Latest / Deep Dive Ortho — Orthopaedic Surgery, AI & Digital Health Podcast. / Proximal Humerus Fractures

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Proximal Humerus Fractures · Deep Dive Ortho — Orthopaedic Surgery, AI & Digital Health Podcast.

• 0:00
  Welcome to The Deep Dive. Today, we're tackling
• 0:03
  something that really blends intricate mechanics
• 0:05
  with some quite complex decision making. It's
• 0:08
  the kind of puzzle, I think, that resonates whether
• 0:10
  you're building a product, managing a team, or,
• 0:14
  well, in this case, dealing with a broken bone.
• 0:17
  We're diving into proximal humorous fractures,
• 0:19
  often just called a broken shoulder. Indeed.
• 0:22
  And it's an injury that really highlights how
• 0:25
  something seemingly straightforward, like a simple
• 0:27
  fall, can actually lead to surprisingly complex
• 0:30
  challenges. Right. So for this Deep Dive, we've
• 0:33
  looked at a range of expert sources, insights
• 0:36
  from the Orthopedic Trauma Association, detailed
• 0:38
  clinical reviews like stat pearls and ortho bullets,
• 0:41
  bits from the bone school, and also a summary
• 0:43
  document from the Stanford AVA lab. OK. And our
• 0:46
  mission today is really to distill the essential
• 0:48
  knowledge from all of that material. Why focus
• 0:50
  on this specific injury? Well, partly because
• 0:53
  it's remarkably common, isn't it, particularly
• 0:55
  among older adults? Yes, very much so. And managing
• 0:59
  it really seems to involve navigating complexity,
• 1:03
  evaluating trade -offs, often under uncertainty,
• 1:06
  and committing to what sounds like quite a demanding
• 1:08
  recovery. These feel like universal themes. Absolutely.
• 1:12
  By looking closely at the sort of anatomy of
• 1:15
  the problem, how we classify its severity, the
• 1:18
  nuanced choices around treatment, and the realities
• 1:21
  of recovery and managing potential risks in a
• 1:23
  specialist field like orthopedics, we definitely
• 1:27
  find parallels. Parallels to strategic challenges
• 1:30
  you might face in, well, any professional field
• 1:32
  really. It's about understanding a specific intricate
• 1:35
  system to gain perhaps broader insights into
• 1:38
  problem solving and resilience. Right, okay.
• 1:41
  Let's get into the mechanics of it then. When
• 1:42
  we talk about a proximal humerus fracture, where
• 1:45
  exactly are we focusing? What's the actual system
• 1:47
  we need to understand here? Okay, let's start
• 1:49
  with the basic structure, drawing on the descriptions
• 1:51
  and sources like the OTA and stat pearls. Your
• 1:53
  shoulder joint is... Well, it's a marvel of mobility,
• 1:56
  really. Yeah. And at its core, you have three
• 1:58
  bones. The clavicle, your collarbone, the scapula,
• 2:03
  which is the shoulder blade, and the humerus,
• 2:05
  your upper arm bone. OK. The proximal humerus
• 2:08
  is simply the section of that humerus closest
• 2:10
  to the shoulder joint. So essentially, the very
• 2:13
  top of the arm bone. So the part that forms the
• 2:15
  ball in the ball and socket joint of the shoulder.
• 2:18
  Precisely. But this ball region, it's not just
• 2:20
  one simple solid structure. To really understand
• 2:23
  how it breaks, orthopedically, it's often viewed
• 2:26
  as being made up of four functional parts. Four
• 2:28
  parts? Yes. This way of thinking was really crystallized
• 2:32
  by the surgeon Charles Near, whose classification
• 2:35
  system we'll definitely come back to. These parts
• 2:37
  are based on how the bone tends to fragment when
• 2:40
  it's injured, often along weaker lines or areas
• 2:42
  where key tendons attach. Four parts within just
• 2:45
  the top of that one bone. That already sounds
• 2:47
  more complex than just a simple break. What are
• 2:50
  they? Well, based on the detailed descriptions
• 2:53
  across our sources, stat pearls, ortho bullets,
• 2:55
  they all cover this. These four key parts are...
• 3:00
  Firstly, the articular segment. That's the rounded
• 3:03
  smooth cartilage covered surface of the humeral
• 3:07
  head itself. Right. The actual ball part that
• 3:09
  moves against the socket on the shoulder blade.
• 3:11
  The surface that allows that smooth movement.
• 3:14
  Exactly. Then... Just below that articular surface,
• 3:17
  you have the anatomic neck. Anatomic neck, okay.
• 3:19
  This is basically the line where the original
• 3:21
  growth plate was in childhood, separating the
• 3:23
  head from the rest of the bone. Fractures right
• 3:25
  along this line can be tricky because they're
• 3:27
  very close to the blood supply feeding the humeral
• 3:29
  head itself. Right, that sounds important. Okay,
• 3:32
  anatomic neck. What's the third part? The third
• 3:34
  is the surgical neck. This is located a bit further
• 3:37
  down the bone, below those bony bones called
• 3:39
  the tuberosities. We'll get to those next. Okay.
• 3:42
  It's often described as the narrowest point or
• 3:44
  perhaps the weakest structural zone of the upper
• 3:47
  humerus. And this is a critically important area
• 3:49
  because a very high percentage of proximal humerus
• 3:52
  fractures happen right here through the surgical
• 3:54
  neck, especially in things like falls onto an
• 3:58
  outstretched arm. It's just a frequent point
• 4:00
  of failure under stress. That makes sense, a
• 4:02
  point of sort of mechanical vulnerability. Okay,
• 4:05
  so we have the articular surface, the anatomic
• 4:07
  neck, the surgical neck. What's the fourth part?
• 4:10
  The fourth part, well, it actually refers to
• 4:12
  two bony prominences or bumps located just below
• 4:16
  the humeral head on the side of the bone. These
• 4:18
  are the greater tuberosity and the lesser tuberosity.
• 4:21
  Right. The greater tuberosity is on the outer
• 4:23
  side of the shoulder, and it's the crucial attachment
• 4:25
  point for three of the four rotator cuff muscles,
• 4:28
  the supraspinatus, infraspinatus, and teres minor.
• 4:31
  These muscles are absolutely vital for lifting
• 4:35
  and rotating the arm outwards. The lesser tuberosity
• 4:38
  is on the front of the bone, and that's where
• 4:40
  the subscapularis muscle attaches, which helps
• 4:43
  with inward rotation. So these tuberosities aren't
• 4:45
  just bumps then, they're actually anchors for
• 4:48
  the muscles that power our shoulder movement.
• 4:50
  Precisely. They are completely integral to the
• 4:53
  function and the stability of the joint. And
• 4:55
  actually, The groove that runs between these
• 4:58
  two tuberosities, that's called the occipital
• 5:00
  groove. That's where the long head of the biceps
• 5:02
  tendon runs. Okay. So when we talk about a proximal
• 5:05
  humerus fracture, we're talking about a break
• 5:06
  that affects one or more of these four functional
• 5:10
  units. The head, the anatomic neck, the surgical
• 5:13
  neck, or those tuberosities. And the nature of
• 5:16
  the fracture, it depends on... which of these
• 5:19
  parts break and, crucially, how they move relative
• 5:22
  to each other. Absolutely. That's the crux of
• 5:24
  it. The OTA source really highlights that the
• 5:27
  pattern and the severity are highly variable.
• 5:29
  It depends heavily on which parts are fractured
• 5:32
  and, really importantly, the extent to which
• 5:34
  these fractured segments have moved or, as we
• 5:37
  say, displaced from their normal anatomical position.
• 5:41
  Right. This displacement is absolutely key to
• 5:43
  determining the stability of the fracture and,
• 5:46
  ultimately, how it should be treated. That leads
• 5:48
  us neatly into how these injuries actually happen.
• 5:50
  You mentioned it's not just one type of event.
• 5:52
  The sources point to quite a distinct pattern,
• 5:54
  don't they? They do, yes. Staff pearls and ortho
• 5:57
  bullets. Both really emphasize what's called
• 5:59
  the classical bimodal distribution of these fractures.
• 6:02
  Bimodal, meaning? It means the injury mechanism
• 6:05
  and the type of patient affected tend to fall
• 6:08
  into two pretty distinct peaks, or groups. Understanding
• 6:12
  these patterns helps us understand the underlying
• 6:14
  risk factors, and often the likely bone quality
• 6:17
  involved. OK, let's explore these two groups.
• 6:20
  What's the most common scenario then? Well, the
• 6:22
  largest group, and this accounts for the clear
• 6:25
  majority of these fractures, involves older adults,
• 6:28
  typically people over the age of 65. Okay. In
• 6:31
  this demographic, the injury is usually caused
• 6:34
  by a low energy mechanism. Most commonly, it's
• 6:37
  a simple fall from standing height. The classic
• 6:39
  scenario is someone tripping, falling onto an
• 6:42
  outstretched hand, or perhaps directly onto their
• 6:45
  elbow or shoulder. And this is where bone density
• 6:47
  comes into play, I assume. Exactly. Stat Pearls
• 6:49
  explicitly notes that in this older population,
• 6:52
  these fractures are very frequently fragility
• 6:55
  fracture. Fragility fractures, meaning the bone
• 6:57
  breaks easily. Precisely. It means the bone has
• 7:01
  broken, not necessarily because the force was
• 7:03
  immense, but because the bone quality itself
• 7:06
  has been compromised, usually by osteoporosis
• 7:08
  or osteopenia thinning of the bone. The bone
• 7:11
  simply isn't strong enough to withstand even
• 7:13
  a moderate force. And these fragility fractures
• 7:16
  are a really significant contributor to the overall
• 7:18
  healthcare burden associated with osteoporosis.
• 7:22
  The incidence of proximal humerus fractures is
• 7:24
  cited as high as maybe 4 % to 6 % of all adult
• 7:28
  fractures. And notably, there's a strong female
• 7:31
  predominance, a reported 2 .1 female to male
• 7:34
  ratio, which reflects the higher prevalence of
• 7:36
  osteoporosis in women. So a very common issue
• 7:39
  in older women, often acting as a sort of red
• 7:42
  flag for underlying bone weakness. What about
• 7:45
  the other group in this bimodal distribution?
• 7:46
  The second peak involves younger, typically more
• 7:49
  active patients. Now for them, it takes a much
• 7:51
  higher energy trauma to cause a fracture in the
• 7:53
  proximal humerus because their bone is generally
• 7:55
  much stronger and denser. Examples of these high
• 7:58
  energy mechanisms would be things like road traffic
• 8:02
  collisions, falls from significant height, or
• 8:05
  maybe high impact sports injuries. That's described
• 8:07
  in the OTA and STAPROL sources. Right. These
• 8:10
  injuries in younger patients are often more severe.
• 8:13
  They might involve more comminution. That means
• 8:16
  shattering of the bone. And they carry a higher
• 8:18
  risk of associated injuries to the surrounding
• 8:20
  soft tissues, nerves, or blood vessels, just
• 8:23
  because of the sheer force involved. It's a stark
• 8:25
  contrast, isn't it? A simple stumble for one
• 8:28
  group versus a major impact for the other really
• 8:31
  highlights different underlying vulnerabilities
• 8:33
  or the external forces at play. So someone sustains
• 8:37
  this injury? What are the immediate signs and
• 8:40
  symptoms you'd expect to see? Well the clinical
• 8:43
  presentation is usually quite dramatic and pretty
• 8:45
  typical of a significant bone injury near a major
• 8:47
  joint. Severe pain is almost always the primary
• 8:50
  symptom localized right around the shoulder and
• 8:53
  the upper arm and this pain is significantly
• 8:55
  worse with any attempt at all to move the arm.
• 8:58
  Swelling and bruising are also very common and
• 9:00
  because of gravity The bruising can actually
• 9:02
  be quite extensive. It might track downwards
• 9:05
  over several days, sometimes appearing around
• 9:07
  the elbow, or even further down in the forearm
• 9:09
  or hand. That's mentioned in the OTA and unknown
• 9:12
  19 sources. Patients will typically hold the
• 9:15
  injured arm very close to their body, often supporting
• 9:18
  it with the other hand, and report an inability
• 9:21
  or just extreme reluctance to move it actively.
• 9:24
  Sometimes they might describe a grating or grinding
• 9:27
  sensation we call that crepitus if the fractured
• 9:30
  bone ends are unstable and rubbing together.
• 9:32
  And beyond just observing and asking about the
• 9:35
  pain, a physical examination sounds absolutely
• 9:37
  crucial to assess the full extent of the damage.
• 9:40
  Oh, absolutely critical. A thorough physical
• 9:42
  examination is indispensable. The clinician will
• 9:45
  visually inspect the shoulder looking for any
• 9:47
  obvious deformity, swelling, or that breathing
• 9:49
  we mentioned. They'll gently palpate the area,
• 9:52
  feel around to identify points of maximal tenderness,
• 9:55
  and potentially feel for that crepitus. However,
• 9:58
  a vital component of the examination, and this
• 10:00
  is heavily emphasized in stepperals and ortho
• 10:02
  -bullets, is the neurovascular assessment. Neurovascular,
• 10:06
  checking nerves and blood vessels. Exactly. checking
• 10:09
  the function of the nerves and the blood vessels
• 10:11
  supplying the arm and hand. Why is that specific
• 10:14
  check so important in a shoulder fracture compared
• 10:17
  to, say, a broken wrist? It's because of the
• 10:21
  very close proximity of major nerves and blood
• 10:24
  vessels to the proximal humerus. particularly
• 10:27
  around that surgical neck area where so many
• 10:29
  fractures occur. The nerve most frequently at
• 10:32
  risk in these injuries is the axillary nerve.
• 10:35
  This nerve actually wraps around the surgical
• 10:37
  neck of the humerus, and it supplies motor function
• 10:39
  to the deltoid muscle, that's the big muscle
• 10:42
  covering the shoulder, essential for lifting
• 10:44
  the arm away from the body. It also supplies
• 10:46
  sensation to the skin over the outer aspect of
• 10:49
  the shoulder, sometimes called the regimental
• 10:51
  badge area. So damage to that nerve could mean
• 10:54
  real weakness in lifting the arm. Precisely.
• 10:57
  A complete axillary nerve injury can result in
• 11:00
  a noticeable weakness or even inability to abduct
• 11:03
  to lift the arm sideways and often a patch of
• 11:06
  numbness on that outer shoulder. Ortho Bullets
• 11:08
  notes that axillary nerve palsy or weakness can
• 11:11
  occur in quite a significant percentage of cases,
• 11:15
  potentially up to 58%. based on some EMG studies,
• 11:18
  although many of these might be temporary or
• 11:20
  partial injuries, what we call neuropraxia. It's
• 11:23
  also highlighted that the nerve is particularly
• 11:25
  vulnerable during certain surgical approaches.
• 11:27
  For instance, with lateral pin placement, if
• 11:30
  doing pericucaneous fixation. Are blood vessels
• 11:32
  also at risk then? Yes, though perhaps less commonly
• 11:35
  injured than the axillary nerve, especially in
• 11:37
  lower energy fractures. The axillary artery runs
• 11:40
  close by and can potentially be damaged. particularly
• 11:44
  in severely displaced fractures or fracture dislocations
• 11:47
  or in those high -energy traumas. Scott Pearls
• 11:50
  mentions arterial injury occurs in... perhaps
• 11:53
  up to 5 % of cases. So it's absolutely crucial
• 11:56
  to check the patient's pulses in the wrist and
• 11:58
  hand and assess the color and temperature of
• 12:01
  the limb to make sure there's adequate blood
• 12:03
  flow. Although, as OrthoBullets points out, the
• 12:05
  shoulder has quite good collateral circulation
• 12:08
  alternative blood pathways. So relying solely
• 12:11
  on pulses might sometimes miss a more subtle
• 12:14
  vascular issue. Assessing motor function and
• 12:17
  sensation for other major nerves like the radial
• 12:20
  and musculocutaneous nerves is also part of a
• 12:23
  thorough exam. So pain, bruising, swelling, potential
• 12:26
  nerve, or even vascular compromise sounds quite
• 12:29
  involved. How do clinicians then get a really
• 12:31
  precise blueprint of the fracture pattern itself
• 12:34
  to guide their decisions? Yeah, that's where
• 12:36
  medical imaging becomes absolutely indispensable.
• 12:39
  Radiographs or x -rays, as most people know them,
• 12:41
  are the absolute cornerstone. They're the mandatory
• 12:44
  initial step. Right. And our sources are very
• 12:46
  specific about the views required to get a complete
• 12:48
  picture. You need what's called a complete trauma
• 12:51
  series of the shoulder. This isn't just one or
• 12:52
  two quick pictures. A trauma series? What does
• 12:54
  that typically include? Well, it involves several
• 12:57
  views taken at different angles. The aim is to
• 12:59
  get orthogonal, meaning 90 -degree perspectives,
• 13:03
  which are essential for judging displacement
• 13:04
  in multiple planes. You need to see it front
• 13:07
  -on and side -on, essentially. OK. Q views usually
• 13:10
  include, first, a true AP anteroposterior view,
• 13:15
  sometimes called a grassy view. This is taken
• 13:18
  with the patient rotated slightly so the x -ray
• 13:20
  beam goes straight through the glenohumeral joint
• 13:22
  space, showing it clearly without the scapula
• 13:25
  overlapping. Gives you that front -on view of
• 13:27
  the joint. Right. Second, a scapular Y view.
• 13:30
  This is a lateral or side -on view. It's taken
• 13:33
  with the patient positioned so the scapula is
• 13:35
  seen on its side, and it looks a bit like the
• 13:37
  letter Y. The humerus should normally sit right
• 13:40
  in the center of that Y. This view is excellent
• 13:42
  for assessing if the humeral head has shifted
• 13:44
  forwards or backwards relative to the socket,
• 13:46
  and it also helps rule out shoulder dislocations.
• 13:50
  And a third view. Yes, usually an axillary lateral
• 13:52
  view. This one is taken ideally with the arm
• 13:55
  abducted, lifted slightly away from the body.
• 13:57
  If the patient can manage it, shooting the x
• 13:59
  -ray beam up from the armpit area. This view
• 14:03
  is crucial for assessing displacement in the
• 14:05
  axial plane. again, forward or backward movement,
• 14:09
  and for seeing those tuberosities clearly in
• 14:11
  profile. Now, if the patient can't lift their
• 14:14
  arm due to pain or the injury itself, modified
• 14:17
  axial views or other techniques might be needed.
• 14:20
  That makes sense, getting multiple angles to
• 14:21
  see the problem from all sides, like looking
• 14:23
  at a complex structure from different viewpoints
• 14:25
  before you decide how to fix it. What if those
• 14:27
  standard x -rays aren't quite enough, if it looks
• 14:30
  particularly complicated? Exactly. If the fracture
• 14:33
  pattern is very complex, maybe shattered into
• 14:36
  many pieces, or if there's a strong suspicion
• 14:39
  that the break extends right into the joint surface
• 14:41
  itself, what we call intra -articular involvement,
• 14:43
  or simply if you need more detail for surgical
• 14:46
  planning, then a CT scan, computed tomography,
• 14:50
  is incredibly valuable. Stat pearls and orthobolates
• 14:53
  both highlight its utility. A CT scan provides
• 14:56
  detailed cross -sectional images, almost like
• 14:59
  slices through the bone. It allows surgeons to
• 15:02
  see precisely the number and position of all
• 15:04
  the fragments, the degree of convolution, how
• 15:06
  shattered it is, and the exact relationship of
• 15:09
  the humeral head to the glenoid socket. This
• 15:12
  is vital for planning how to fix it, whether
• 15:14
  with pins, plates, or even a replacement. It's
• 15:17
  particularly good for assessing the position
• 15:19
  of those two porosities and the state of the
• 15:21
  articular surface. And MRI, is that ever necessary
• 15:24
  for these fracture? MRI, magnetic resonance imaging.
• 15:29
  is less commonly used for assessing the bone
• 15:31
  fracture itself. Its strength is really in evaluating
• 15:34
  soft tissues. As the Orthobolus points out, an
• 15:37
  MRI might be considered if there's a strong suspicion
• 15:39
  of a significant associated soft tissue injury
• 15:41
  that could really impact the treatment or the
• 15:43
  outcome. For example, a complete tear of the
• 15:46
  rotator cuff tendons, or perhaps significant
• 15:49
  ligament damage, which might happen alongside
• 15:51
  the fracture in those higher energy traumas.
• 15:53
  Okay, so imaging gives us that detailed blueprint.
• 15:56
  Then comes the task of actually classifying the
• 15:59
  damage, which seems to be where orthopedic surgeons
• 16:02
  translate all this complex image data into a
• 16:05
  framework for making decisions. We mentioned
• 16:07
  the near classification earlier. Let's dig into
• 16:10
  that. How does it work, and why is this act of
• 16:13
  classification so central to deciding the path
• 16:16
  forward? Yeah, classification is absolutely fundamental
• 16:18
  in orthopedic trauma. It does two main things.
• 16:21
  It provides a common language so surgeons can
• 16:23
  communicate effectively about specific injury
• 16:25
  patterns, and it provides a framework for grouping
• 16:28
  similar injuries together, which in turn helps
• 16:31
  guide treatment algorithms and allows us to compare
• 16:34
  outcomes in research studies. The near classification,
• 16:37
  which is based on those four functional parts
• 16:39
  we discussed earlier, the articular surface or
• 16:41
  head, the greater tuberosity, the lesser tuberosity,
• 16:44
  and the shaft or surgical neck region is arguably
• 16:47
  the most widely used system for proximal humerus
• 16:49
  fractures. And it classifies fractures based
• 16:52
  purely on the number of these four primary parts
• 16:54
  that are significantly displaced. So it's not
• 16:57
  just about how many fracture lines you can see
• 16:59
  on the x -ray, but specifically about how far
• 17:02
  the main pieces have moved. That feels like a
• 17:04
  key distinction. It is the key distinction. That's
• 17:06
  the critical insight from near system. A fracture
• 17:10
  line can exist, maybe multiple lines, but if
• 17:13
  the pieces remain in relatively good alignment,
• 17:16
  it's treated very differently than if they've
• 17:18
  shifted significantly out of place. According
• 17:20
  to StatPearls and OrthoBullets, a segment is
• 17:23
  considered significantly displaced if it is moved
• 17:26
  by more than one centimeter. or 10 millimeters,
• 17:29
  or if it's angled by more than 45 degrees relative
• 17:32
  to its normal anatomical position. Right. Those
• 17:34
  are the specific thresholds used to determine
• 17:37
  if a part counts towards the classification number.
• 17:39
  Got it. Okay, so let's walk through the near
• 17:41
  categories based on that displacement rule. How
• 17:43
  does it start? Right. It starts simply. A one
• 17:46
  -part fracture. This means there are fracture
• 17:49
  lines present in the proximal humerus, potentially
• 17:51
  separating multiple segments, but, and this is
• 17:54
  the crucial bit, none of the four main parts,
• 17:57
  head, tuberosity, shaft, are displaced by more
• 18:00
  than that one centimeter or 45 degrees. So it's
• 18:02
  key, multiple cracks don't automatically make
• 18:06
  it a multi -part fracture in the Nair system
• 18:08
  if the fragments are still essentially in place.
• 18:11
  Orthobolus notes that these minimally displaced
• 18:13
  fractures often technically two -part surgical
• 18:15
  neck fractures, but with minimal shift, are actually
• 18:18
  the most common type we see. So even if there
• 18:21
  are breaks technically separating several areas,
• 18:24
  if everything stays relatively put, it's classified
• 18:27
  as a one -part. That's maybe a bit counterintuitive
• 18:29
  at first. What's a two -part fracture then? A
• 18:32
  two -part fracture means there are fracture lines
• 18:34
  separating two or more segments, but only one
• 18:37
  of those four major functional parts is significantly
• 18:40
  displaced again, more than one centimeter or
• 18:42
  45 degrees. Just one part moved significantly.
• 18:45
  Yes. A very common example highlighted by ortho
• 18:48
  bullets is a surgical neck fracture, where the
• 18:51
  main shaft fragment is displaced upwards or angled.
• 18:53
  but the humeral head and the tuberosities remain
• 18:56
  together as a single unit and in reasonable alignment
• 18:59
  relative to each other. Or, alternatively, maybe
• 19:02
  the greater tuberosity alone is pulled off and
• 19:05
  displaced, but the head and shaft remain aligned.
• 19:07
  Okay, makes sense. And it just increases from
• 19:09
  there. Exactly. A three -part fracture involves
• 19:12
  fracture lines separating three or more segments,
• 19:15
  and now two of the four primary parts are significantly
• 19:18
  displaced relative to the others. Two parts out
• 19:21
  of place. Yes. So a typical three -part fracture
• 19:24
  might involve a fracture through the surgical
• 19:26
  neck with significant displacement of both the
• 19:29
  greater and lesser tuberosities relative to the
• 19:32
  humeral head and shaft. or perhaps displacement
• 19:34
  of just one tuberosity in the surgical neck fragment.
• 19:37
  The point is, two of those four core units are
• 19:40
  significantly out of alignment. Right. And finally,
• 19:43
  the most severe in this system. That would be
• 19:45
  the four -part fracture. This is the most complex
• 19:48
  and generally unstable pattern classified by
• 19:50
  NEAR. It means there are fracture lines separating
• 19:52
  all four primary parts, the articular segment
• 19:55
  head, the greater tuberosity, the lesser tuberosity,
• 19:57
  and the shaft. And three of these four parts
• 20:00
  are significantly displaced relative to each
• 20:02
  other and the remaining segment. The blood supply
• 20:05
  to the humeral head is often significantly compromised
• 20:08
  in these injuries, which dramatically increases
• 20:10
  the risk of the bone in the head dying off what
• 20:12
  we call a vascular necrosis, or AVN. Okay. OrthoBullets
• 20:16
  also mentions some specific patterns that are
• 20:18
  particularly problematic, like fractures right
• 20:21
  through the anatomic neck, which have a very
• 20:23
  high risk of AVN, fracture dislocations, where
• 20:27
  the humeral head is not only broken but also
• 20:29
  completely out of the socket, and head split
• 20:31
  fractures, where the articular surface itself
• 20:33
  is actually shattered. These are often considered
• 20:36
  within or alongside the four -part category due
• 20:39
  to their severity and implications for treatment,
• 20:42
  especially the risk to blood supply. So the NEAR
• 20:44
  system provides a kind of shorthand, driven entirely
• 20:47
  by displacement, for communicating the complexity
• 20:50
  and the likely instability of the fracture. We
• 20:53
  also saw mention of another system, the AOTA
• 20:56
  classification. Is that widely used as well,
• 20:59
  or is it more for specific purposes? Yes, the
• 21:01
  AOATA system is another important classification,
• 21:04
  and it's also referenced in StatPearls and OrthoBolix.
• 21:06
  It's generally a more detailed and comprehensive
• 21:09
  system than NEAR. It's actually part of a much
• 21:11
  larger universal system. designed for classifying
• 21:14
  all bone fractures throughout the body. It organizes
• 21:18
  proximal humerus fractures into three main groups
• 21:21
  labeled A, B, and C, based primarily on whether
• 21:24
  the fracture is extra -articular, meaning it
• 21:27
  doesn't involve the joint surface directly. Those
• 21:29
  are the A types. Partially intraarticular, some
• 21:32
  involvement of the joint surface, the B types.
• 21:34
  Or fully intraarticular, crossing the joint surface
• 21:37
  significantly, the C types. Right. And then within
• 21:39
  each of those groups, there are numerous subgroups
• 21:42
  that detail specific fracture patterns and the
• 21:45
  level of convolution or shattering. Unknown19
• 21:48
  mentions that a newer version from 2018 attempts
• 21:51
  to integrate some of NEAR's concepts about displacement
• 21:54
  while providing even greater descriptive power.
• 21:57
  So, more detailed. Yes, much more granular. It's
• 21:59
  often preferred in research settings because
• 22:01
  it allows for very precise comparisons between
• 22:04
  studies. And it's also very useful for detailed
• 22:06
  preoperative planning, especially for the really
• 22:08
  complex cases, as it allows for finer distinctions
• 22:11
  in the fracture patterns. But perhaps for day
• 22:13
  -to -day communication, NEAR is still very commonly
• 22:15
  used because of its relative simplicity based
• 22:18
  on that key concept of displacement. Okay, so
• 22:21
  we've sort of dissected the anatomy, understood
• 22:23
  the ways it breaks, and how those breaks are
• 22:26
  classified based on displacement. Now comes the
• 22:29
  really crucial, and it sounds like often challenging
• 22:32
  phase, deciding on the actual treatment. This
• 22:35
  seems less like a simple A or B choice and much
• 22:38
  more like navigating a complex decision tree,
• 22:41
  especially given all the variability and patience
• 22:44
  in fracture patterns. It is indeed a complex
• 22:46
  decision. This is where applying all that knowledge
• 22:48
  to a very specific situation becomes paramount,
• 22:51
  much like, as you say, strategic decision making
• 22:53
  in other fields. And here's where it gets really
• 22:56
  interesting and perhaps quite counterintuitive
• 22:58
  for many people. Okay. The sources we looked
• 23:00
  at consistently state that the majority of proximal
• 23:03
  humerus fractures are actually treated successfully
• 23:05
  without surgery. Really? That is surprising.
• 23:08
  When you picture a broken shoulder, I think most
• 23:10
  people instinctively assume surgery is needed.
• 23:12
  It's a common assumption, but the data suggests
• 23:14
  otherwise. Both the OTA and StatPearl site figures
• 23:17
  suggesting that somewhere between 80 % and 85
• 23:20
  % of these fractures can be managed non -operatively.
• 23:23
  80 to 85 percent. Wow! So non -operative management
• 23:26
  is the default path for most. For fractures that
• 23:29
  are minimally displaced, and remember what minimally
• 23:31
  displaced means in the Nair system, no part displaced
• 23:35
  more than one centimeter or 45 degrees non -operative
• 23:38
  management is generally the preferred approach.
• 23:40
  Okay. This includes almost all one -part fractures,
• 23:44
  even if there are multiple fracture lines visible,
• 23:46
  and indeed many two -part surgical neck fractures
• 23:49
  where the displacement is still within those
• 23:51
  accepted limits. Even some displaced greater
• 23:54
  tuberosity fractures might be managed non -operatively
• 23:57
  initially. Although ortho bullets specifies that
• 24:00
  displacement of the greater tuberosity by more
• 24:02
  than about five millimeters is usually considered
• 24:04
  unacceptable for non -operative treatment. Why
• 24:07
  is that specific tuberosity displacement such
• 24:10
  an issue? Because the rotator cuff muscles attach
• 24:12
  there. If that fragment heals in a position that's
• 24:15
  too high or too far back, it can physically block
• 24:17
  the shoulder from moving properly. causing painful
• 24:20
  impingement and significant loss of function,
• 24:22
  especially lifting the arm. The muscles pull
• 24:24
  it out of place. Right, makes sense. So if the
• 24:27
  pieces are still in relatively good alignment,
• 24:29
  the body is often capable of healing it itself
• 24:32
  given the chance. Precisely. The goal of non
• 24:35
  -operative treatment is simply to allow the bone
• 24:37
  to heal naturally. in an acceptable position
• 24:40
  while trying to maintain as much shoulder function
• 24:42
  as possible throughout the process. It's essentially
• 24:45
  a trust in the body's own biology. OK. This management
• 24:49
  typically starts with a period of immobilization,
• 24:51
  usually just for a few weeks, maybe two to three,
• 24:54
  in a sling or a similar support like a shoulder
• 24:57
  immobilizer. This is primarily for comfort during
• 25:00
  the initial very painful phase, and also to provide
• 25:03
  some protection for the healing tissues. Just
• 25:05
  a few weeks of immobilization, not months of
• 25:08
  being completely still then. Crucially, no. And
• 25:11
  this is a really key point highlighted across
• 25:13
  the sources. Prolonged, rigid immobilization
• 25:16
  of the shoulder is actually detrimental. Why
• 25:18
  is that? Because it inevitably leads to significant
• 25:21
  stiffness. The shoulder capsule thickens and
• 25:24
  contracts. potentially resulting in a frozen
• 25:27
  shoulder or adhesive capsulitis, which could
• 25:29
  be incredibly difficult to recover from. So the
• 25:32
  non -operative protocol needs to transition relatively
• 25:35
  quickly into a phase of progressive, supervised
• 25:38
  physical therapy and rehabilitation. As early
• 25:41
  as, say, 10 to 14 days after the injury, once
• 25:44
  the very acute pain starts to settle, patients
• 25:47
  are often encouraged to begin gentle range of
• 25:49
  motion exercises such as pendulum exercises as
• 25:52
  their pain allows. Pendulum exercises. That's
• 25:55
  just letting the arm hang down and gently swinging
• 25:57
  it. Exactly. Using gravity to create some gentle
• 26:00
  movement at the shoulder joint without actively
• 26:02
  using the muscles. This helps prevent the capsule
• 26:05
  from seizing up. Okay. Then active assisted range
• 26:08
  of motion where the patient uses their good hand
• 26:10
  or a therapist helps to move the injured arm
• 26:13
  typically begins around four to six weeks once
• 26:15
  the initial pain is subsided further and there's
• 26:17
  some early biological healing starting full active
• 26:20
  range of motion using their own muscles and then
• 26:22
  strengthening exercises follow on from that gradually
• 26:25
  increasing in intensity as the bone continues
• 26:27
  to heal and symptoms improve. It requires significant
• 26:30
  patient buy -in though. Diligence is key. And
• 26:34
  a good rehabilitation team is vital, as noted
• 26:36
  in Unknown 19. Pain management throughout this
• 26:39
  whole process is also absolutely critical to
• 26:41
  allow participation in therapy. How long does
• 26:44
  the bone itself take to heal? The bone itself
• 26:47
  usually takes roughly three to four months to
• 26:49
  achieve solid biological healing, or union, according
• 26:51
  to the OTA. But, and this is important, regaining
• 26:54
  full function, the movement and strength often
• 26:57
  takes considerably longer. Okay, so non -operative
• 27:00
  is the main path for most, focusing heavily on
• 27:02
  early movement and diligent rehab. When is surgery
• 27:05
  indicated then? When do clinicians decide that
• 27:07
  the risks and costs of operating are actually
• 27:10
  outweighed by the potential benefits? Surgery
• 27:13
  is generally reserved for those fractures that
• 27:15
  are significantly displaced beyond those near
• 27:17
  thresholds or fractures that are inherently unstable
• 27:20
  or ones that involve specific patterns that are
• 27:24
  considered unlikely to heal well or restore adequate
• 27:26
  function if they're just left in the sling. Right.
• 27:28
  The decision is also very heavily influenced
• 27:31
  by patient factors. We have to consider their
• 27:33
  age, their overall health, their functional demands.
• 27:37
  What do they need to be able to do with that
• 27:39
  arm? Their general activity level, the quality
• 27:41
  of their bone, Is it strong or osteoporotic?
• 27:44
  And even things like their hand dominance. Okay.
• 27:47
  For example, a young active person with a significantly
• 27:50
  displaced three -part fracture is much more likely
• 27:53
  to benefit from surgery aimed at restoring the
• 27:56
  anatomy as perfectly as possible to give them
• 27:58
  the best chance of optimal long -term function.
• 28:01
  That might be different compared to, say, an
• 28:04
  older, less active individual with lower functional
• 28:06
  demands and perhaps poorer bone quality where
• 28:09
  the risks of surgery might be higher and the
• 28:11
  potential gains less critical for their lifestyle.
• 28:14
  Makes sense. StatPearls and OrthoBullets outline
• 28:16
  several main surgical options, each with its
• 28:19
  own specific indications, advantages, and potential
• 28:22
  drawbacks. Okay, let's try and walk through the
• 28:24
  main surgical strategies then. It sounds like
• 28:26
  there are different approaches for different
• 28:28
  types of break or maybe different types of patient.
• 28:30
  Exactly. It's all about tailoring the solution
• 28:33
  to the specific problem and also to the capabilities
• 28:36
  of the system, meaning the patient's bone quality,
• 28:39
  their overall health, their ability to participate
• 28:42
  in rehab, and so on. One option is closed reduction
• 28:45
  and percutaneous pinning, CRPP. Closed reduction,
• 28:49
  meaning no big cut. That's right. It involves
• 28:52
  manipulating the bone fragments back into a better
• 28:54
  alignment without making a large surgical incision,
• 28:58
  closed reduction, and then holding them in that
• 29:00
  position using metal pins or sometimes wires
• 29:03
  which are inserted through small poke holes in
• 29:05
  the skin, percutaneous pinning. Okay. When would
• 29:08
  that be used? It's often considered for certain
• 29:10
  two -parter or maybe some three -part surgical
• 29:13
  neck fractures, or occasionally specific four
• 29:15
  -part fractures, particularly in patients who
• 29:18
  have good quality bone where the fragments can
• 29:21
  be manipulated back into place relatively easily
• 29:23
  and are expected to hold with just pins. What
• 29:26
  are the sort of pros and cons of that approach?
• 29:29
  Well, the main advantage is that it's less invasive
• 29:32
  than open surgery. That potentially means a quicker
• 29:35
  initial recovery, less disruption to the blood
• 29:37
  supply. Right. But the fixation isn't as mechanically
• 29:40
  strong or rigid as using plates and screws. OrthoBullets
• 29:44
  notes that CRPP can have higher rates of certain
• 29:46
  complications, like pin -side infections or loss
• 29:50
  of reduction, meaning the bone slipping out of
• 29:51
  place again after surgery compared to other methods.
• 29:54
  And as we discussed earlier, the axillary nerve
• 29:56
  is definitely at risk, particularly with pins
• 29:59
  placed from the lateral or outer side. OK. What
• 30:02
  about using plates and screws? That sounds like
• 30:04
  a much more rigid way to hold everything together.
• 30:07
  It is. That's open reduction and internal fixation,
• 30:10
  or IF. This is a more direct approach. It involves
• 30:13
  making a surgical incision, exposing the fracture
• 30:16
  site, open reduction, carefully putting the bone
• 30:19
  fragments back together like a jigsaw puzzle
• 30:21
  under direct vision, and then fixing them firmly
• 30:24
  in place using anatomically pre -contoured metal
• 30:27
  plates and screws. Okay. This is often indicated
• 30:30
  for displays two, three, and particularly some
• 30:33
  four -part fractures, especially those displaced
• 30:35
  surgical neck fractures and significantly displaced
• 30:38
  tuberosity fractures. Remember those needing
• 30:41
  to be pulled back down if displaced more than
• 30:43
  five millimeter. It's often the preferred method
• 30:46
  in younger patients where restoring the precise
• 30:48
  anatomy is considered critical for optimal long
• 30:50
  -term function. Unknown 19 mentions it's typically
• 30:53
  aimed at younger patients or those where the
• 30:55
  fragments are distinct and manageable enough
• 30:57
  to piece back together. Are there specific technical
• 31:00
  challenges with using plates and screws in this
• 31:02
  particular bone, the humerus? Yes, absolutely.
• 31:05
  Especially given that many of these fractures,
• 31:07
  the low -energy ones, occur in older patients
• 31:10
  who often have osteoporotic bone. Meaning the
• 31:12
  bone is soft? Exactly. Soft and sometimes quite
• 31:15
  brittle, which doesn't provide a very strong
• 31:18
  grip for the screws. Orthobolus goes into significant
• 31:21
  detail on this. A key challenge is providing
• 31:24
  adequate support on the inner or medial side
• 31:26
  of the humerus. Why is that side so important?
• 31:29
  Because without good support there, the humeral
• 31:31
  head has a tendency to collapse or shift downwards
• 31:34
  and inwards into what we call a varus position,
• 31:37
  especially if the bone is shattered underneath,
• 31:39
  combinated. This varus collapse is a common failure
• 31:42
  mechanism. Right. So surgeons use specific techniques
• 31:46
  to try and prevent this. They might place a specific
• 31:48
  screw, called a calcar screw, upwards into a
• 31:51
  denser area of bone on that medial side. Or sometimes,
• 31:55
  particularly in severe convolution, they might
• 31:57
  even use a piece of donor bone, often a strut
• 32:00
  graft taken from the patient's fibula, lower
• 32:02
  leg bone, and place it alongside the plate to
• 32:04
  act as a buttress, providing that crucial medial
• 32:07
  support. Wow, using bone from the leg. Yes, it
• 32:09
  can provide excellent mechanical support. Even
• 32:12
  with these techniques, screw cutout, where the
• 32:14
  screws lose their grip in the soft bone of the
• 32:16
  humeral head and pull out, remains a significant
• 32:19
  and relatively common complication after locking
• 32:22
  plate fixation. It's reported in maybe up to
• 32:25
  14 % of cases in some series. Careful plate positioning
• 32:29
  is also essential to avoid irritating or damaging
• 32:32
  nearby structures, like the rotator cuff tendons
• 32:34
  or blood vessels. It really sounds like a technically
• 32:37
  demanding surgery, particularly when dealing
• 32:39
  with weaker bone. What about the option of using
• 32:42
  a rod inside the bone instead? Yes, that's intramedullary
• 32:45
  nailing. This involves inserting a specially
• 32:48
  designed metal rod down the hollow central canal,
• 32:51
  the medullary cavity of the humerus. This rod
• 32:54
  crosses the fracture site. Screws are then inserted
• 32:57
  through the bone and into the nail both above
• 32:59
  and below the fracture to lock the fragments
• 33:01
  in the nail together and control rotation. Okay,
• 33:04
  when is nailing used? It's typically used for
• 33:06
  certain fractures of the surgical neck or perhaps
• 33:09
  some specific two or three part fractures. It's
• 33:12
  often considered in younger patients with good
• 33:14
  bone quality or sometimes when there's also a
• 33:17
  fracture further down the humeral shaft that
• 33:19
  needs fixing as well, the nail can potentially
• 33:21
  address both. What are the pros and cons of nailing
• 33:25
  compared to, say, pleating? Well, ortho bullets
• 33:27
  suggest IMN can potentially have favorable healing
• 33:30
  rates and might allow for slightly earlier range
• 33:33
  of motion compared to plates in some cases, as
• 33:36
  it acts more like an internal splint, a load
• 33:38
  sharing device. However, a potential downside
• 33:41
  is the insertion point for the nail. Where does
• 33:43
  it go in? It usually has to be inserted through
• 33:45
  the very top of the humerus, which often requires
• 33:48
  making a split in or going through part of the
• 33:51
  rotator cuff tendons, usually the supraspinatus.
• 33:54
  This necessary violation of the rotator cuff
• 33:56
  can sometimes lead to persistent shoulder pain
• 33:58
  or impingement symptoms after surgery. There
• 34:01
  are also risks to nerves, particularly the axillary
• 34:03
  and radial nerves, with the placement of the
• 34:06
  locking screws used to secure the nail. Okay,
• 34:08
  so different trade -offs again. Now what about
• 34:11
  the most significant intervention, replacing
• 34:13
  the joint entirely? Right, that's arthroplasty,
• 34:15
  or shoulder replacement. This is generally considered
• 34:18
  for the most severe fracture patterns where the
• 34:20
  bone fragments are deemed unlikely to heal reliably,
• 34:24
  perhaps where the articular surface itself is
• 34:26
  badly damaged or split, or, crucially, where
• 34:30
  the blood supply to the humeral head is thought
• 34:32
  to be significantly compromised, leading to a
• 34:34
  very high risk of that avascular necrosis, AVN,
• 34:37
  the bone dying off. It also sometimes uses a
• 34:41
  salvage procedure if other surgical attempts,
• 34:44
  like ORIF, have failed. Arthroplasty is generally
• 34:47
  chosen more frequently for older patients, especially
• 34:50
  those with poorer bone quality, or perhaps those
• 34:52
  who already had significant shoulder arthritis
• 34:54
  or rotator cuff problems even before the fracture.
• 34:57
  The sources describe two main types used for
• 35:00
  fracture. OK, what are they? The first is hemiarthroplasty,
• 35:02
  hemi meaning half. This involves replacing only
• 35:05
  the humeral side of the joint. The ball is replaced
• 35:08
  with a metal prosthesis. The socket side, the
• 35:11
  glenoid on the shoulder blade, is left as it
• 35:13
  is. This might be used in slightly younger patients,
• 35:16
  maybe those aged 40 to 65, with certain fracture
• 35:19
  patterns where the head isn't salvageable, but
• 35:21
  the rotator cuff is still functional. Or it's
• 35:24
  also an option in older patients with severely
• 35:26
  shattered anatomic neck fractures, or four -part
• 35:29
  fractures, as described in sat pearls and ortho
• 35:32
  bullets. What's the main challenge with heme
• 35:34
  arthroplasty for fractures? A really critical
• 35:37
  challenge is getting those tuberosity fragments,
• 35:39
  remember, where the rotator cuff muscles attach
• 35:42
  to heal correctly onto the middle prosthesis
• 35:44
  and in the right position. This is technically
• 35:47
  demanding. If the tuberosities don't heal properly
• 35:50
  or heal in the wrong place, then the rotator
• 35:53
  cuff function is compromised, which can significantly
• 35:56
  limit movement, particularly the ability to rotate
• 35:59
  the arm outwards. Okay. And the other... type
• 36:02
  of replacement, the one that sounds like it's
• 36:04
  becoming more common. Yes, that's the reverse
• 36:06
  total shoulder arthroplasty, RSA. This is being
• 36:09
  used increasingly, particularly in older, perhaps
• 36:12
  less functionally demanding patients with complex
• 36:14
  fractures. It's called reverse because it fundamentally
• 36:16
  alters the shoulder's normal biomechanics. In
• 36:19
  a standard shoulder replacement, you replace
• 36:21
  the ball with a metal ball and the socket with
• 36:24
  a plastic socket. In an RSA, you actually put
• 36:28
  the ball component onto the shoulder blade side
• 36:31
  on the glenoid socket, and you put a socket component
• 36:33
  onto the top of the humeral bone. It flips the
• 36:36
  joint around. Exactly. It effectively reverses
• 36:39
  the ball and socket. The clever thing about this
• 36:41
  design is that it allows the large deltoid muscle
• 36:44
  on the outside of the shoulder to become the
• 36:46
  primary elevator of the arm, effectively bypassing
• 36:49
  the need for a functional rotator cuff. Ah, I
• 36:52
  see. So it's indicated in elderly patients with
• 36:54
  very complex fractures, especially four -part
• 36:56
  fractures, those where the tuberosities are shattered
• 36:59
  beyond repair, non -reconstructable, those with
• 37:02
  very poor bone stock making fixation difficult,
• 37:04
  or importantly, those who already had large irreparable
• 37:07
  rotator cuff tears before they even broke. their
• 37:09
  shoulder. So the RSA is chosen when the normal
• 37:12
  engine for lifting the arm the rotator cuff is
• 37:15
  damaged or can't be relied upon and it essentially
• 37:18
  leverages a different engine the deltoid muscle
• 37:20
  to do the work. That's a very good way to think
• 37:22
  about it, yes. It shifts the joint's center of
• 37:25
  rotation downwards and inwards, which tensions
• 37:28
  the deltoid muscle fibers more effectively, allowing
• 37:30
  them to lift the arm even without a working rotator
• 37:33
  cuff. Interesting. OrthoBullets notes that even
• 37:36
  when doing an RSA for fracture, attempting to
• 37:39
  repair the greater tuberosity fragment back to
• 37:41
  the prosthesis is still generally recommended
• 37:44
  if possible, as it seems to improve the overall
• 37:47
  range of motion, particularly rotation. Okay.
• 37:50
  stat pearls adds an interesting observation.
• 37:53
  RSA performed as a primary procedure for a bad
• 37:55
  fracture or perhaps after failed non -operative
• 37:58
  management might actually yield better functional
• 38:01
  outcomes than RSA performed as a salvage procedure
• 38:04
  after a failed attempt at ORIF with plates and
• 38:07
  screws. Why might that be? The thinking is perhaps
• 38:10
  there's less scarring and damage to the surrounding
• 38:12
  muscles and tissues in the non -operative group
• 38:14
  compared to those who've had a previous complex
• 38:17
  open surgery that didn't succeed. It's really
• 38:19
  clear there's no single best treatment then.
• 38:21
  It's all about carefully matching the intervention
• 38:23
  to the specific patient, the specific fracture
• 38:26
  pattern, and the predicted likelihood of success
• 38:29
  with the different methods, considering all those
• 38:31
  risks and benefits. Which brings us to the journey
• 38:34
  after the initial treatment, the road to recovery.
• 38:38
  This sounds like it's probably a marathon, not
• 38:40
  a sprint. Absolutely. That's a very apt description.
• 38:44
  Whether treated nonoperatively with just a sling
• 38:46
  or operatively with complex metalwork, recovery
• 38:49
  from a proximal humerus fracture is often a lengthy
• 38:52
  and demanding process for the patient. Right.
• 38:54
  While the bone itself might achieve biological
• 38:56
  union, as we said, in maybe three to four months,
• 38:58
  according to the OTA, regaining full or even
• 39:01
  near full pain -free range of motion, strength,
• 39:04
  and functional independence takes significantly
• 39:06
  longer, often six months to a year and sometimes
• 39:09
  even more. That's a really substantial commitment
• 39:12
  of time and effort. What makes the recovery so
• 39:15
  particularly challenging with this injury? Well,
• 39:17
  several factors contribute. Pain is often prolonged,
• 39:20
  especially in the early stages, and managing
• 39:23
  it effectively is key to enabling refabilitation.
• 39:26
  Stiffness is a major, major hurdle. Stiffness?
• 39:30
  Yes. The shoulder joint is notoriously prone
• 39:32
  to developing adhesive capsulitis, that frozen
• 39:35
  shoulder, after almost any significant injury
• 39:37
  or period of immobilization. And this can happen
• 39:40
  regardless of whether it was treated non -operatively
• 39:42
  or operatively. Regaining strength in the shoulder
• 39:45
  and arm muscles, which weaken very rapidly with
• 39:48
  disuse, requires dedicated, consistent effort
• 39:51
  over many months. And unknown 19 also highlights
• 39:55
  something important. The significant emotional
• 39:58
  and psychological impact these injuries can have.
• 40:01
  How so? Think about the loss of independence.
• 40:03
  the inability to perform simple daily tasks like
• 40:06
  dressing or cooking, the persistent pain, and
• 40:09
  sometimes the frustratingly slow pace of recovery.
• 40:11
  This can understandably lead to frustration,
• 40:14
  anxiety, and sometimes even depression, which
• 40:16
  in turn can impact motivation for rehab. So that
• 40:19
  diligent physical therapy we talked about earlier
• 40:21
  isn't just recommended. It sounds absolutely
• 40:23
  essential. It is absolutely non -negotiable.
• 40:26
  You simply won't get the best possible outcome
• 40:28
  without it. A structured progressive rehabilitation
• 40:31
  program guided by a physiotherapist is the cornerstone
• 40:35
  of recovery, whether the fracture was treated
• 40:37
  with a sling or with the most complex surgery.
• 40:40
  OrthoBullets describes a typical multi -phase
• 40:42
  program, starting with those gentle, often passive
• 40:45
  or pendulum range of motion exercises very early
• 40:48
  on, progressing carefully to active assisted
• 40:51
  and then full active range of motion as healing
• 40:53
  allows and pain settles. And finally, incorporating
• 40:56
  progressive strengthening exercises for the rotator
• 40:59
  cuff, deltoid, and scapular stabilizing muscles,
• 41:02
  along with more advanced functional exercises
• 41:04
  relevant to the patient's goals. Without this
• 41:07
  commitment to physical therapy, significant stiffness
• 41:10
  and lasting limitations in movement are almost
• 41:12
  guaranteed. This is stressed across all the main
• 41:15
  sources, the OTA or the bullets unknown 19. What
• 41:18
  are the potential long -term outcomes then, even
• 41:20
  assuming successful treatment and good rehab?
• 41:23
  Are there often lingering issues people should
• 41:25
  be aware of? While most patients will certainly
• 41:27
  see significant improvement over time, it is
• 41:30
  important to manage expectations realistically.
• 41:33
  Full restoration back to exactly the pre -injury
• 41:36
  level of function isn't always achieved, particularly
• 41:39
  with the more complex fracture patterns, or often
• 41:42
  in older patients. The OTA mentions that persistent
• 41:46
  stiffness, perhaps not regaining the last few
• 41:49
  degrees of motion, some degree of ongoing soreness
• 41:52
  or pain, particularly with certain activities
• 41:54
  or weather changes, and maybe not quite regaining
• 41:57
  the original level of strength, these are not
• 41:59
  uncommon long -term outcomes. The shoulder might
• 42:02
  just feel and move a bit differently than it
• 42:04
  did before the injury, even years later. And
• 42:07
  beyond just those lingering symptoms, what about
• 42:09
  actual complications that can arise, either during
• 42:12
  healing or later on? We touched on some earlier,
• 42:14
  like nerve injury or infection. Yes. Unfortunately,
• 42:17
  complications can occur with both non -operative
• 42:19
  and operative management, and they can obviously
• 42:21
  significantly impact the final outcome, sometimes
• 42:24
  requiring further intervention. Drawing from
• 42:26
  the information in StatPearls, OrthoBullets,
• 42:28
  and Unknown19, the potential complications include
• 42:31
  quite a range. Non -union. This is where the
• 42:34
  bone simply fails to heal completely. Orthobolus
• 42:37
  states, this is perhaps most common after two
• 42:40
  -part surgical neck fractures, and risk factors
• 42:43
  include being older, being a smoker, and significant
• 42:45
  displacement initially. Melunian, this means
• 42:48
  the bone does heal, but it heals in a poor or
• 42:52
  abnormal position, maybe with significant angulation
• 42:54
  or displacement remaining. A malunited greater
• 42:58
  tuberosity fragment, for instance, healing too
• 43:00
  high, is a classic cause of chronic pain and
• 43:03
  impingement of the rotator cuff tendons when
• 43:06
  lifting the arm of vascular necrosis, AVN. I
• 43:09
  mentioned this. The blood supply to the humeral
• 43:11
  head gets disrupted by the fracture lines, causing
• 43:14
  the bone tissue in the head to die. This can
• 43:16
  lead to the head collapsing or fragmenting over
• 43:18
  time, causing pain and arthritis. It's a significant
• 43:21
  risk, particularly in those four -part fractures
• 43:23
  and anatomic neck fractures, precisely because
• 43:26
  the fracture lines run through areas critical
• 43:28
  for blood supply. Stiffness Adhesive Capsulitis,
• 43:31
  that frozen shoulder we discussed, a significant
• 43:33
  loss of range of motion due to scarring and thickening
• 43:36
  of the joint capsule. This is a risk in almost
• 43:38
  any significant shoulder injury or surgery, but
• 43:42
  particularly common after fractures due to the
• 43:44
  initial trauma and necessary periods of immobilization.
• 43:48
  Okay. Nerve injury. While some nerve issues might
• 43:50
  be present right from the initial injury, nerve
• 43:53
  damage can also occur during surgery or sometimes
• 43:56
  nerve function doesn't recover fully. The axillary
• 43:58
  nerve is the most commonly affected. Radial and
• 44:01
  musculocutaneous nerve injuries are less common,
• 44:04
  but certainly possible. Hardware complications.
• 44:07
  These are specific to operative treatment involving
• 44:09
  plates, screws, pins, or nails. Examples include
• 44:13
  that screw cut out from the bone, especially
• 44:15
  with plates in poor quality osteoporotic bone.
• 44:19
  Hardware can also loosen over time, break, or
• 44:21
  sometimes just become prominent or irritating,
• 44:24
  requiring removal later on. Infection. Always
• 44:27
  a risk with any surgery, though thankfully relatively
• 44:30
  low with modern techniques, it can be devastating
• 44:32
  if it occurs, often requiring further operations.
• 44:35
  Post -traumatic arthritis. Arthritis can develop
• 44:37
  in the shoulder joint over time, sometimes years
• 44:40
  later, especially if the original fracture involved
• 44:42
  the articular surface, or if there was a malunion
• 44:45
  or AVN that altered the joint mechanics. And
• 44:49
  these complications, particularly things like
• 44:51
  painful non -union, Malunion, AVN, or severe
• 44:54
  stiffness can sometimes necessitate further surgery
• 44:57
  down the line. Often, this might involve converting
• 44:59
  to a salvage shoulder replacement, particularly
• 45:02
  in older individuals, if the pain dysfunction
• 45:04
  are severe enough. It really highlights that
• 45:07
  fixing the initial break is just the very beginning,
• 45:09
  isn't it? Managing the whole biological and mechanical
• 45:12
  environment to get successful healing and good
• 45:14
  long -term function is incredibly complex. It
• 45:17
  also underscores the need for expertise right
• 45:19
  at the start. diagnosis. What else could potentially
• 45:23
  cause similar symptoms that might be mistaken
• 45:26
  for a proximal humerus fracture initially? That's
• 45:29
  a critical point for clinicians. Yes, being able
• 45:33
  to distinguish a fracture from other potential
• 45:36
  sources of severe shoulder pain and dysfunction
• 45:38
  is step one. StatProls provides quite an extensive
• 45:42
  list of these differential diagnoses that must
• 45:44
  be considered. It's a bit like ensuring you're
• 45:46
  diagnosing the correct root cause of a business
• 45:48
  problem before you jump to proposing a solution.
• 45:51
  Right. What sorts of things are on that list?
• 45:53
  What else could it be? Well, it's quite broad,
• 45:56
  as you might imagine. It certainly encompasses
• 45:57
  other traumatic injuries right around the shoulder
• 46:00
  complex. Things like dislocations of the main
• 46:03
  shoulder joint itself, which can actually occur
• 46:05
  with fractures, complicating things further,
• 46:07
  or fractures of the clavicle. the collarbone,
• 46:10
  or the scapula, the shoulder blade. But it also
• 46:13
  includes a wide range of non -bony injuries and
• 46:16
  conditions that can cause significant shoulder
• 46:18
  pain. Rotator cuff pathology. This is a big one.
• 46:21
  It includes acute tears, maybe partial or full
• 46:24
  -thickness tears caused by the same trauma that
• 46:26
  might have caused a fracture. Or it could be
• 46:29
  chronic issues like tendonitis or impingement
• 46:31
  syndromes where the tendons are getting pinched.
• 46:34
  Degenerative conditions, things like pre -existing
• 46:36
  or developing glenohumeral arthritis, just wear
• 46:39
  and tear of the joint surface, or even avascular
• 46:42
  necrosis, AVN, occurring independently of any
• 46:44
  recent trauma. Capsular issues. Adhesive capsulitis,
• 46:48
  that frozen shoulder again. Sometimes the onset
• 46:51
  can be relatively sudden, making it difficult
• 46:53
  to differentiate from the stiffness following
• 46:55
  a fracture initially, although the history of
• 46:58
  injury is usually different. Biceps, tendon problems,
• 47:02
  things like inflammation, tendonitis, or even
• 47:04
  ruptures of the long head of the biceps tendon
• 47:06
  where it runs near the shoulder joint, acromioclavicular
• 47:09
  joint issues, the joint at the top of the shoulder
• 47:12
  where the collarbone meets the shoulder blade.
• 47:14
  Things like AC joint separation from a fall or
• 47:17
  just arthritis in that joint. Shoulder instability.
• 47:21
  Patients might have recurrent dislocations or
• 47:23
  just a general feeling of looseness called multi
• 47:25
  -directional instability. And then less common,
• 47:29
  but still possible, are neurovascular issues
• 47:31
  presenting primarily as pain. Things like nerve
• 47:34
  entrapments, perhaps superscapular neuropathy,
• 47:37
  affecting the rotator cuff muscles, or thoracic
• 47:39
  outlet syndrome affecting nerves and vessels
• 47:41
  as they leave the neck. Or, very rarely, vascular
• 47:45
  events like subclavian artery thrombosis. So
• 47:47
  quite a significant overlap in potential symptoms,
• 47:51
  then, really requiring a systematic approach
• 47:53
  to diagnosis using the patient's history, the
• 47:55
  physical exam findings, and then targeted imaging
• 47:57
  to confirm. Precisely. A thorough evaluation
• 48:00
  is absolutely essential to pinpoint the exact
• 48:03
  name the nature of the injury or the condition
• 48:04
  causing the symptoms. This is why self -diagnosis
• 48:07
  for severe shoulder pain is really risky. And
• 48:09
  getting an expert clinical assessment is paramount.
• 48:12
  And as Stat Pearls notes, optimal management
• 48:15
  requires more than just understanding the injury
• 48:17
  itself. It requires tailoring the treatment plan
• 48:20
  very carefully to the individual patient, considering
• 48:22
  their age, their functional status, their hand
• 48:25
  dominance, their overall health, and any other
• 48:27
  medical problems, even their social situation
• 48:30
  and support network, and crucially, personal
• 48:32
  goals and expectations for recovery. It has to
• 48:35
  be a holistic assessment, not just focusing narrowly
• 48:38
  on the broken bone. This comprehensive approach
• 48:41
  to managing these injuries, especially when you
• 48:43
  consider how common they are in our aging population,
• 48:47
  feels like it must pose a significant challenge
• 48:49
  for healthcare systems more broadly. Are the
• 48:52
  sources touching upon how the system is grappling
• 48:54
  with this, particularly perhaps the cost aspect?
• 48:57
  They are, yes. And this is a point with significant
• 49:00
  implications that go beyond just this specific
• 49:02
  injury. The StatPearl source in particular highlights
• 49:05
  that proximal humerus fractures, precisely because
• 49:08
  they are common, and the treatment, especially
• 49:10
  surgical treatment and rehab, can be costly,
• 49:12
  are increasingly becoming a focus of health care
• 49:14
  cost containment strategies and alternative payment
• 49:17
  models. Cost containment and alternative payment
• 49:20
  models. What does that actually mean in practice?
• 49:24
  What means that health care systems and the organizations
• 49:27
  that pay for care, like insurers or government
• 49:29
  bodies, are actively looking for ways to manage
• 49:32
  the total costs associated with treating these
• 49:35
  injuries more efficiently and predictably. Right.
• 49:38
  This includes initiatives like bundled payments,
• 49:40
  where a single predetermined payment is made
• 49:42
  to cover all the services related to a specific
• 49:45
  episode of care, say, from the initial fracture
• 49:48
  diagnosis right through several months of recovery
• 49:51
  and rehabilitation, rather than paying for each
• 49:53
  individual doctor visit, x -ray, surgery, therapy
• 49:56
  session separately. Oh, I see. The idea is this
• 49:59
  encourages hospitals and all the providers involved
• 50:01
  to coordinate care more effectively, reduce unnecessary
• 50:04
  variations, and control the overall cost of that
• 50:06
  episode. There's also a growing emphasis on standardizing
• 50:09
  diagnosis, treatment, and rehabilitation pathways
• 50:12
  based on the best available evidence and outcomes
• 50:14
  data. Standardizing care pathways. Does that
• 50:17
  risk creating a sort of one -size -fits -all
• 50:21
  approach, given how much variability there seems
• 50:23
  to be in these fractures and, as you said, in
• 50:26
  the patients themselves? That's exactly the tension,
• 50:29
  isn't it? Yeah. And StatPearls explicitly cautions
• 50:32
  against adopting a rigid one -size -fits -all
• 50:35
  strategy. The goal, ideally, is not to eliminate
• 50:38
  individualized care based on clinical judgment
• 50:40
  and patient needs, but rather it's about using
• 50:43
  big data. aggregating information from large
• 50:46
  patient populations, analyzing outcomes from
• 50:48
  different treatments in different groups through
• 50:50
  research studies to identify best practices,
• 50:53
  understand risk factors better, and determine
• 50:55
  which treatments tend to be most effective and
• 50:56
  cost effective for different patient profiles
• 50:59
  and fracture types. This population -level knowledge
• 51:01
  should then inform what they call customized
• 51:03
  application at the level of the hospital or clinic
• 51:06
  and ultimately at the individual patient level.
• 51:08
  So, using the big -picture data to help refine
• 51:11
  individual treatment decisions, rather than dictating
• 51:14
  them rigidly from the top down. Exactly. It's
• 51:16
  about establishing evidence -based guidelines
• 51:18
  and protocols that can guide decision -making
• 51:21
  and reduce unwarranted variation, while still
• 51:24
  allowing clinicians the flexibility to exercise
• 51:26
  their judgment and incorporate patient preferences.
• 51:30
  But achieving this effectively requires really
• 51:32
  strong active communication and collaboration
• 51:35
  among the entire healthcare team. The whole team.
• 51:38
  Yes, the orthopedic surgeons, the anesthetists,
• 51:41
  nurses, physical therapists, occupational therapists,
• 51:45
  perhaps geriatricians for older patients, social
• 51:47
  workers, case managers, everyone involved needs
• 51:50
  to work together to ensure the patient receives
• 51:52
  coordinated, efficient, and effective care right
• 51:55
  from the moment of injury through their long
• 51:57
  -term recovery. It's a systemic challenge that
• 51:59
  really requires a team -based solution. And just
• 52:02
  going back to those low -energy fractures in
• 52:04
  older patients, StatPearls also notes that the
• 52:06
  fracture itself is effectively a diagnosis of
• 52:08
  compromised bone density, doesn't it? Yes, that's
• 52:11
  a crucial point highlighted in the Pearls section
• 52:13
  of that source. For any older adult who sustains
• 52:16
  a proximal humerus fracture from a simple fall
• 52:19
  or minimal trauma, assessing and addressing their
• 52:22
  underlying bone health, specifically looking
• 52:24
  for osteoporosis, is really non -negotiable.
• 52:28
  Because that fracture acts as a sentinel event.
• 52:31
  It's a major warning sign indicating that the
• 52:35
  patient is at significantly high risk for suffering
• 52:37
  other fragility fractures in the future, particularly
• 52:40
  devastating ones like hip fractures or vertebral
• 52:43
  fractures in the spine or wrist fractures. Right.
• 52:45
  So ensuring these patients receive appropriate
• 52:47
  follow -up, which usually involves bone density
• 52:50
  testing, like a decasis scan, and then management,
• 52:53
  which might include lifestyle advice, calcium
• 52:56
  and vitamin D supplementation, and potentially
• 52:58
  specific osteoporosis medications. That's a key
• 53:01
  part of providing comprehensive care. It's not
• 53:04
  just about fixing the immediate break. That connects
• 53:06
  back really powerfully to prevention then, doesn't
• 53:08
  it? If poor bone quality and falls are the major
• 53:11
  factors driving the most common type of proximal
• 53:14
  humerus fracture, then surely addressing those
• 53:16
  upstream issues has to be critical. Absolutely.
• 53:19
  And Unknown 19 provides some specific prevention
• 53:22
  strategies that resonate broadly with the idea
• 53:24
  of risk management. management. For older adults,
• 53:27
  fall prevention is paramount. What does that
• 53:29
  involve? It involves several things. Identifying
• 53:32
  and modifying potential environmental hazards
• 53:34
  in their home, things like securing loose rugs,
• 53:37
  improving lighting, installing grab bars or handrails
• 53:40
  in bathrooms and on stairs. It also involves
• 53:43
  reviewing their medications, as some can cause
• 53:45
  dizziness or unsteadiness. Ensuring they have
• 53:48
  appropriate, well -fitting footwear is important
• 53:50
  too. And crucially, incorporating regular balance
• 53:53
  and strength training exercises into their routine
• 53:56
  can significantly reduce fall risk. For athletes
• 53:59
  or perhaps people involved in high impact activities
• 54:02
  or contact sports, using appropriate protective
• 54:05
  gear like shoulder pads where relevant is key.
• 54:07
  And for everyone, really, particularly as we
• 54:10
  age, focusing on overall bone health is vital.
• 54:13
  That means ensuring adequate dietary intake or
• 54:16
  supplementation of calcium and vitamin D, avoiding
• 54:19
  smoking, limiting alcohol intake, and engaging
• 54:22
  in regular weight -bearing physical activity,
• 54:24
  things like walking, jogging, dancing, stair
• 54:27
  climbing, which helps stimulate bone density
• 54:29
  and also maintain muscle strength, which further
• 54:32
  supports balance and reduces fall risk. This
• 54:34
  entire journey we've discussed from, you know,
• 54:36
  really understanding the intricate anatomy of
• 54:39
  the brake and classifying its severity to then
• 54:41
  navigating those complex treatment decisions
• 54:43
  with all their inherent risks and trade -offs
• 54:45
  and then committing to what sounds like an often
• 54:48
  arduous road of recovery while managing potential
• 54:50
  complications, it truly does mirror challenges
• 54:53
  we often face in many professional domains, doesn't
• 54:55
  it? It really does. That need to deeply understand
• 54:59
  a complex system before intervening. the need
• 55:02
  to classify problems effectively to help guide
• 55:05
  action, the need to weigh different potential
• 55:08
  solutions based on evidence, but also considering
• 55:10
  the specific context and the individual system
• 55:13
  you're dealing with, the need to anticipate and
• 55:15
  manage inherent risks, and ultimately the need
• 55:18
  to embrace a resilient, often team -based approach
• 55:21
  to achieve the desired outcome. Whether you're
• 55:24
  talking about healthcare, engineering, finance,
• 55:26
  or business strategy, these core principles seem
• 55:28
  remarkably consistent. Well, we hope this deep
• 55:31
  dive has given you a much clearer picture of
• 55:33
  proximal humerus fractures, perhaps revealing
• 55:35
  some of the layers of complexity beneath what
• 55:37
  might initially seem like just a straightforward
• 55:39
  broken bone. Yes. From the subtle yet critical
• 55:42
  points of anatomy, the distinct patterns of injury
• 55:45
  depending on age and mechanism, the classification
• 55:48
  systems that help structure our decision -making
• 55:50
  around displacement, the important nuances and
• 55:53
  trade -offs between non -operative care and the
• 55:56
  various operative strategies, right through to
• 55:58
  the demanding but absolutely vital process of
• 56:01
  rehabilitation and being aware of the potential
• 56:03
  hurdles of complications, understanding these
• 56:05
  different facets really provides a robust framework
• 56:08
  for thinking about this injury. And it all stems
• 56:10
  directly from the comprehensive source material
• 56:13
  we've been exploring today, the Orthopedic Trauma
• 56:15
  Association guidelines, those detailed reviews
• 56:18
  and stat pearls and ortho bullets, insights from
• 56:20
  the bone school and the Stanford AVA lab summary
• 56:24
  document. So our thanks to the experts and authors
• 56:27
  behind all of those valuable resources. Indeed.
• 56:30
  They provide the foundational knowledge that's
• 56:32
  absolutely necessary to navigate what is often
• 56:34
  a very complex clinical challenge. If you found
• 56:37
  this deep dive insightful, perhaps because it
• 56:39
  helped you understand complexity through a slightly
• 56:41
  different lens today, please do consider leaving
• 56:44
  us a rating and maybe sharing it with someone
• 56:46
  in your network who you think might also benefit.
• 56:49
  And finally, perhaps consider this provocative
• 56:51
  thought. building on that increasing prevalence
• 56:53
  of these injuries, especially in older adults.
• 56:57
  Given the clear interception of an aging global
• 56:59
  population, the rising incidence of osteoporosis,
• 57:03
  and the significant functional implications in
• 57:05
  healthcare costs associated with proximal humerus
• 57:08
  fractures is the healthcare system currently
• 57:10
  doing enough to shift its focus from primarily
• 57:14
  treating these injuries after they happen to
• 57:16
  more effectively preventing them on a true population
• 57:18
  scale. What systemic changes might be needed
• 57:21
  to really manage this growing fragility fracture
• 57:24
  epidemic proactively rather than reactively?
• 57:27
  A question with some very broad implications
• 57:29
  indeed. Something to think about. Until next
• 57:31
  time on The Deep Dive.