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Radiocarpal Fractures and Dislocations · Deep Dive Ortho — Orthopaedic Surgery, AI & Digital Health Podcast.

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Welcome back to Deep Dive Ortho, where we pull
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apart complex orthopedic topics to get to the
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core insights. Today, we're zeroing in on the
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wrist an absolute engineering marvel, isn't it?
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So intricate, allowing incredible precision,
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yet incredibly vulnerable to some truly devastating
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injuries. Our focus for this deep dive is on
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radiocarpal fracture dislocations. These are
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far beyond your everyday sprains or simple breaks.
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They're uncommon, yes, but when they do occur,
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the impact on a patient's life, their function,
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their future, Well, it can be profound and long
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-lasting. Our mission today is to truly unpack
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the intricacies of these severe injuries. We'll
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explore everything from the subtle diagnostic
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clues that can be missed to the sophisticated
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surgical strategies and the long -term realities
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for these patients. We're aiming for a comprehensive,
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nuanced understanding tailored specifically for
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you, our mid -senior medical professionals who
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often face these challenging cases. To guide
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us through this complex anatomical and clinical
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landscape, we're honored to have our expert guest
0:57
with us today. Thank you. It's a pleasure to
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be here. You've hit the nail on the head. Radiocarpal
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fractured dislocations are, without question,
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at the more severe end of the wrist injury spectrum.
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They almost invariably result from high energy
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trauma, and their potential for significant,
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even permanent functional impairment means that
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a truly deep understanding is absolutely crucial.
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It's not just about fixing a bone. It's about
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meticulous planning and execution, really, to
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preserve a patient's long -term quality of life.
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Absolutely. And that meticulous approach begins
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right at the foundation. You know when we talk
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about such profound disruptions, it always circles
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back to the anatomical foundation. This injury
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is so devastating because of how perfectly engineered
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the wrist is. Could you start us off by reminding
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us of its critical components, especially those
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that bear the brunt of these forces? Of course.
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Yes, to appreciate the scale of disruption in
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these injuries, we must first briefly recap the
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wrist's intricate architecture. At its core,
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we have the radiocurple joint. It's the primary
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articulation where the distal end of the radius,
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along with its crucial articular disc, meets
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three key bones of the proximal carpus. The scaphoid,
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the lunate, and the tricotral. Functionally,
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it's classified as a synovial ellipsoid joint,
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which is what grants the wrist its incredible
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range of two -axis movement, flexion extension,
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and abduction. It's vital to remember the radius
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directly articulates with the scaphoid and lunate,
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while its connection to the trichetrol is indirect,
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through that biconcave articular disc. And that
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disc is actually part of the larger triangular
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fibrocartilaginous complex of TFCC. Adjacent
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to this, and equally critical, is the distal
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radial nar joint, or DRUJ. This is a synovial
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pivot joint formed between the ulnar head and
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the sigmoid notch of the radius. Now here's a
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truly remarkable insight. While bones obviously
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provide structure, the osseous components of
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the DRU -J contribute only about 20 % to its
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overall stability. Only 20%. Yes, only about
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20%. The vast majority, a staggering 80%, comes
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from its soft tissues, most notably the triangular
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fibrocartilaginous complex, or TFCC. This isn't
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just a simple disc, it's a sophisticated complex
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that acts as a major stabilizer for both the
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radiocarpal and ulna -carpal joints. It plays
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a critical role in preventing the ulna from impacting
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the carpus, a condition known as ulnocarpal abutment,
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and critically, it facilitates the complex pronation
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and supination movements of the forearm and wrist.
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Its key components include the central articular
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disc itself, the dorsal and palmar radial gnar
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ligaments that tether the radius and ulna, the
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ulnomenescal homolog, and the ulnar collateral
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and ulnocarpal ligaments. You see, even a seemingly
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minor tear here can lead to profound functional
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deficits down the line, far beyond what SC's
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injury alone might cause. That's a really important
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point about the TFCC. It is. Then beyond these
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primary articulations, we have the intricate
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arrangement of the eight carpal bones organized
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into two rows. These bones, along with a dense
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network of intrinsic and extrinsic ligaments,
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function as both static and dynamic stabilizers,
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enabling the wrist's wide range of movements.
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From a clinical perspective, in these severe
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injuries, the intrinsic ligaments of most concern
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are the scaphalunate and lino -trichotral ligaments.
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Each has dorsal, volar, and interosseous fibrocartilaginous
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components, and their integrity is paramount
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to maintaining carpal alignment. And how do we
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check that alignment? You mentioned radiographs
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earlier. Yes. For assessing carpal alignment
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on standard radiographs, we heavily rely on what
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we call the jalula arcs. When we look at a PA
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wrist x -ray, we're almost looking for a specific
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set of curves. Think of it like a finely tuned
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machine. You expect three perfectly smooth concentric
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arches formed by the carpal bones. The first
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arc outlines the proximal margin of the proximal
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carpus, the second outlines its distal margin,
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and the third outlines the proximal margin of
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the capitate and hamet. If any of those arcs
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are broken, jagged, or discontinuous, a loss
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of congruency is a huge red flag. It's a simple
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visual cue that immediately tells you something
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is profoundly out of alignment within the carpus,
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often the first hint of a serious injury. Right,
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a break in the pattern. Exactly. Now, when we
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discuss the extrinsic ligaments, their role in
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preventing radiocarpal dislocation is truly paramount.
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What's truly eye -opening is the sheer biomechanical
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dominance of the Volar Capsular Ligamentus Complex.
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This complex includes critical structures like
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the radioscapocapitate, the long and short radiolunate
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ligaments, and the Palmar capsule. They are not
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just supporting players. They are the primary
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restraint against radiocarvel dislocation. Research
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demonstrates they contribute a substantial 61
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% of resistance to dorsal translation and 48
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% to Palmar translation of the carpus. 61 % for
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dorsal? That's huge! It is. In stark contrast,
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the dorsal ligaments contribute a minor 2 % and
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6 % respectively under the same conditions. This
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isn't just a number. It's a direct roadmap for
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our surgical priorities. Robust repair of these
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holostructures and any associated radial styloid
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fracture isn't an option. It's the absolute non
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-negotiable cornerstone for restoring stability.
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So the Volar site is really the key player in
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preventing dislocation. Absolutely. Finally,
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just briefly on innervation and blood supply.
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The radiocarpal joint receives its nerve supply
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from articular branches of the anterior interosseous
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nerve from the median, the posterior interosseous
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nerve from the radial, and the deep endorsal
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branches of the ulnar nerve. Blood supply is
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primarily from branches of the dorsal and palmar
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carpal arches. However, for these high energy
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injuries, it's a potential for traction neuropraxia
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to these nerves due to the severe deformity.
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That's the real clinical concern we must vigilantly
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monitor. That foundational understanding of the
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wrist's intricate design truly highlights how
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disruptive a radiocarpal fracture dislocation
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can be. It's like a complex machine suddenly
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losing its core alignment, especially when you
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consider how much stability comes from those
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volar ligaments. Knowing that they are the primary
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restraints really puts the severity into perspective.
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So what does this all mean when we talk about
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the injury itself? How does such a severe disruption
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occur, and what exactly defines it, beyond just
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the general idea of a wrist injury? You're right
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to connect the two. The anatomical complexity
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makes these injuries particularly challenging.
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To define it precisely, a radiocarpal dislocation
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or RCD refers to the total loss of contact between
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the carpus and the distal radius. This is a key
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differentiator from simpler intraarticular shear
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or rim fractures of the distal radius, where
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a piece of the articular surface may break off.
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But the main articular fragment still maintains
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contact with the carpus. When we speak of a radiocarpal
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fracture dislocation, or RCFD, we're talking
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of this total loss of contact along with associated
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bony fractures. It's a combined injury of both
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the articulation and bone. Okay, total loss of
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contact. And how common are these? Well, in terms
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of how often we see these, RCFEs are, thankfully,
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rare. They account for only about 0 .2 % of all
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wrist injuries annually. Tiny fraction. Very
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small. Epidemiologically, we tend to see them
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more frequently in males than females, and dorsal
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dislocations are somewhat more common than volar
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dislocations. The most significant demographic
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trend, though, is their strong association with
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high -energy trauma. These aren't typically simple
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slips. They demand significant force. We're talking
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about mechanisms like falls from a significant
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height, high -speed motor vehicle accidents,
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or industrial accidents. Right, serious mechanisms.
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Exactly. The typical mechanism of injury involves
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a high -energy shear or rotational force applying
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to a wrist that is both hyperextended and pronated.
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This classic scenario is often described as a
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foosh injury, a fall on an outstretched hand.
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The sheer force involved in such an event means
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that the damage isn't limited to just the bony
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structures. It also extends to the crucial ligaments
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and can frequently involve vessels and nerves.
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It's truly a domino effect of destruction. A
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domino effect. That's a good way to put it. And
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this brings us to the profound importance of
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identifying concomitant injuries as they are
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exceedingly common with RCFDs. From an orthopedic
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perspective, we frequently find various types
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of distal radius fractures, particularly radial
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styloid avulsion fractures. These are highly
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significant because they often involve the direct
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attachment point of the radioscapocapitate ligament,
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a primary stabilizer we just discussed. Oh, back
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to that key ligament. Precisely. We also commonly
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see volar lunate facet fractures, which are where
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the short radiolunate ligament attaches, and
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ulnar styloid fractures. Beyond the radius and
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ulna, other carpal bone fractures are regrettably
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common, including the scaphoid, lunate trapezium,
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trichotrol hamate, pisiform, and capitate. It's
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a whole cascade. It's also critical to assess
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for an irreducible DRUJ, which can occur due
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to soft tissue interposition and for intercarpal
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injuries, such as capillunate or lunatric control
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dissociation, which further complicate the overall
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stability and long -term prognosis. And what
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about nerves and vessels? You mentioned neuropraxia
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earlier. Yes, neurological involvement is also
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a significant concern, often presenting with
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a patient reporting numbness or weakness. Median
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nerve injuries are more frequent than ulnar nerve
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injuries in these cases. These are typically
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due to a mechanical traction neuropraxia, where
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the nerve is stretched or pulled over the deformed
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wrist during the injury. It's not necessarily
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a direct laceration, but the nerve is functionally
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compromised by the extreme distortion of the
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anatomy. Additionally, radial and ulnar artery
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injuries are not uncommon due to the severe deformity
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that occurs, sometimes requiring immediate vascular
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assessment and potentially repair. That cascade
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of associated injuries you mentioned, it really
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drives home how much is at stake. It's not just
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a bone break, it's a systemic disruption affecting
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bones, ligaments, nerves, vessels. Here's where
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it gets really interesting. The sheer force required
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and the cascade of associated injuries underscore
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the critical need for a meticulous approach.
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So when a patient presents with this level of
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trauma, how do we as clinicians effectively cut
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through the noise and get a definitive diagnosis?
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What are your go -to imaging strategies and what
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are the critical findings we should be looking
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for? Indeed, diagnosis is foundational. and it
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starts with the most accessible tools. Conventional
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radiography, or X -ray as it's commonly called,
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is always the primary radiological investigation
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for acute wrist trauma. For suspected wrist fractures,
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it's essential to obtain at least three views.
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The posterior anterior, or PA view, the lateral
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view, and a 45 degree oblique view. For increased
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sensitivity, particularly when a scaphoid fracture
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is suspected given their high incidence in FUSH
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injuries, we'll often place the hand in ulnar
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deviation for the PA scaphoid views as this elongates
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the scaphoid bone and can unmask subtle fractures.
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High quality radiographs with standardized positioning
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are key. Poor images can lead to significant
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misdiagnoses. Right, good quality views are essential.
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What are the signs on x -ray? On the PA view,
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crucial radiographic signs of a radiocarpal dislocation
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include a total loss of contact between the carpus
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and the radius, often with ulnar translation
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of the carpus and widening of the inner carpal
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spaces. As we discussed, a clear sign is the
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disruption of the jalula arcs, those three concentric
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arcs that define normal carpal alignment, losing
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their coloniality. The broken arcs again. Exactly.
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If you see breaks in those smooth curves, it's
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an immediate red flag. On the lateral view, we
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look for obvious dorsal or volar radiocarpal
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wrist dislocation and a loss of collinearity
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of the lunate with the articular surface of the
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radius. If there's a lunate dislocation, you'll
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specifically see what's often referred to as
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the spilled teacup sign, where the lunate displaces
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vularly, resembling an overturned teacup. Ah,
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the spilled teacup. Classic sign. It is. When
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evaluating associated disco -radius fractures
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on x -ray, we also measure several parameters
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that correlate strongly with long -term patient
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outcomes. These include radial length, normally
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11 to 22 millimeters, radial inclination, normally
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13 to 30 degrees, And the volar, or dorsal tilt,
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measured on the lateral view, normally ranges
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from 4 degrees dorsal to 11 degrees volar tilt.
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Significant deviations, for example, a decrease
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in radial length by more than 2 mm, a dorsal
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tilt greater than 20 degrees, or radial inclination
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less than 10 degrees are all associated with
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decreased long -term risk function and alert
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us to the need for more aggressive intervention.
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Subtle clues on initial radiographs, such as
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soft tissue swelling or the obliteration of the
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pronator quadratus fat stripe, can also hint
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at a fracture. However, it's important to remember
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a critical limitation. Approximately 30 % of
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wrist fractures, especially scaphoid fractures,
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can be radiographically occult on initial x -rays.
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30 % missed on initial x -ray. That's significant.
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It is. A negative x -ray, especially with high
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clinical suspicion, should never rule out a fracture
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definitively. So what's next if the x -ray isn't
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clear or you suspect more? This is precisely
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where computed tomography, or CT, becomes the
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modality of choice for more detailed evaluation.
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CT is invaluable for suspected bony injuries,
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particularly when radiographs are negative or
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indeterminate. It excels at visualizing complex,
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comminuted fractures, and, crucially, it allows
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us to identify and measure intraarticular step
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-offs, especially those greater than 2 millimeters.
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We know these strongly correlate with late development
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of osteoarthritis and typically warrant open
14:06
reduction and internal fixation to restore articular
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congruity. CT also provides multiplanar and volumetric
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reformations, which are incredibly useful for
14:14
comprehensive preoperative planning, allowing
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us to virtually reconstruct the injury before
14:19
we even enter the operating theater. So CT for
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the bone detail and planning. Exactly. It's also
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superior for detecting subtle, non -displaced
14:27
scaphoid fractures and other associated carpal
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injuries that might be missed on conventional
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x -rays. Furthermore, CT is the gold standard
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for evaluating DRUJ dislocations, with the epicenter
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method being the preferred technique for its
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instability and guiding reduction. Okay, and
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where does MRI fit into this picture? Magnetic
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resonance imaging, or MRI, has a more limited
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role in the acute phase of fractures and dislocations
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due to its availability, time constraints, and
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cost. However, its critical role lies in evaluating
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soft tissue injuries, such as damage to tendons,
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ligaments, and muscles components often severely
15:02
compromised in these high -energy traumas. It's
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also excellent for detecting truly occult fractures,
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particularly trabecular fractures without cortical
15:09
breach, which CT you're going to miss. For instance,
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a short protocol MRI can be used effectively
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in the emergency setting specifically for suspected
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occult scaphoid fractures. Optimized parameters
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for wrist MRI typically involve an 8 -12 cm field
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of view, 3 mm slice thickness, and dedicated
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phased array extremity coils. Sequences like
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T2 weighted or proton density with fat suppression
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are ideal for detecting bone meridima and fracture
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lines, while T1 weighted sequences are added
15:36
for assessing bony alignment. It truly provides
15:39
the missing pieces of the puzzle when the soft
15:40
tissue injury is extensive or unclear. That's
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a powerful toolkit for diagnosis. It really underscores
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the importance of choosing the right imaging
15:48
at the right time to get the full picture, especially
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when so much can be missed on initial radiographs.
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It's not just about seeing a break. It's about
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truly understanding the extent of the damage
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to both bone and soft tissue. Once we've identified
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and fully characterized the injury, how do we
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categorize these complex fragments? dislocations.
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Are there classification systems that help guide
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prognosis and management? That's an excellent
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point, as classification helps us both understand
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the severity and plan our approach. While we
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have several classification systems, it's worth
16:20
briefly acknowledging some of the eponymous distal
16:23
radius fractures first. For those of you regularly
16:25
in clinic, terms like collis fracture or Smith
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fracture are second nature. Very familiar names.
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Indeed. They describe specific patterns collis
16:34
with dorsal displacement. often from a fall on
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a dorsiflexed hand, common in older patients
16:40
with osteoporosis. Smith's, the reverse, with
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voller displacement, often from higher energy
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onto a flexed wrist, perhaps in younger individuals.
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Then there's Barton's fracture, an intra -articular
16:51
shear fracture with carpal displacement, either
16:53
voller or dorsal. and the Hutchinson fracture,
16:56
or Chauffeur's fracture, involving the radial
16:59
styloid, again intraarticular. While these terms
17:01
are deeply ingrained in practice, their universal
17:03
reproducibility on radiographs or CT scans is
17:07
actually quite limited, as studies have shown.
17:09
Ah, so maybe less reliable than we think. Potentially.
17:12
Therefore, when assessing the severity of radial
17:15
fractures in the context of our CFDs, the most
17:17
important considerations for us are the precise
17:19
displacement of the fracture fragments, the extent
17:21
of intraarticular extension, and any step off.
17:24
particularly the DRUJ or radiocarpal joint, the
17:27
degree of comminution, and critically, the presence
17:30
of any associated ulnar, other carpal bone, or
17:33
soft tissue injuries. These factors directly
17:35
dictate prognosis and the surgical approach,
17:37
perhaps more than the epinome itself. Okay, focus
17:39
on the specifics of the injury pattern rather
17:41
than just the name. What about classification
17:44
specifically for the radiocarpal fracture dislocations
17:47
themselves? Yes. Moving specifically to radiocarpal
17:51
fracture dislocations, there are a couple of
17:53
classifications we refer to. The monium classification
17:56
divides these injuries based on the presence
17:58
of intercarpal involvement. Type 1 injuries are
18:01
RCFDs without associated intercarpal dissociation.
18:06
So the dislocation is at the radiocarpal joint,
18:09
maybe with a radial styloid fracture, but the
18:11
carpus itself remains intact as a unit. Type
18:14
2, on the other hand, involves an RCFD with associated
18:18
intercarpal dissociation, maybe a carpal bone
18:21
fracture or an intercarpal ligament tear. This
18:24
means the injury has propagated further into
18:25
the carpus. And does that distinction matter
18:27
clinically? It does. It's generally accepted
18:30
that type 2 injuries are typically more severe
18:33
and are associated with worse outcomes, often
18:35
necessitating open reduction and more extensive
18:37
repair. They demand a heightened level of vigilance.
18:39
Right, more complex repair needed. Then there's
18:42
the dumontia classification. This classifies
18:45
RCFDs into two groups, historically attempting
18:47
to guide the surgical approach. Type 1 is a purely
18:51
ligamentous RCFD, or one involving only a small
18:55
cortical evulsion off the radius. The key here
18:57
is primary ligamentous failure. Type 2 refers
19:01
to an RCFD associated with a large radial styloid
19:03
fracture fragment, involving at least one third
19:06
of the scaphoid fossa. The implication is the
19:09
crucial ligaments are attached to that displaced
19:11
styloid fragment. Historically, this suggested
19:14
maybe a volar approach for type 1 and dorsal
19:16
for type 2. However, clinical experience has
19:19
shown that outcomes varied, and current thinking
19:21
often requires a more combined, comprehensive
19:23
approach regardless of this classification to
19:26
ensure full anatomical restoration. So the Dumontier
19:28
type might not dictate the approach as much anymore?
19:31
Not rigidly, no. The injury itself dictates the
19:34
approach needed for full reduction and fixation.
19:37
Finally, it's also important to consider the
19:39
Mayfield classification for perilunate instability,
19:41
as RCFDs can be part of this progressive spectrum,
19:44
especially with high -energy trauma. This describes
19:47
a sequential pattern of ligament disruption around
19:49
the lunate. Stage 1. Scaffolunate dissociation
19:52
widening of that interval. A lesser arc injury.
19:55
Stage 2. Perilunate dislocation. The lunate stays
19:59
aligned with the radius, but the rest of the
20:01
carpus dislocates, usually dorsally. This is
20:04
often a greater arc injury. potentially involving
20:06
fractures like a transcephoid perilunate dislocation.
20:10
Stage 3 adds lunotricatural joint disruption.
20:13
Stage 4, complete disruption of radial lunate
20:16
ligaments, allowing the lunate itself to displace
20:18
volarely that classic spilled teacup sign again.
20:21
The whole carpus sort of unravels sequentially.
20:23
Precisely. And it's worth noting that transcephoid
20:26
perilunate dislocation is actually the most common
20:28
pattern of perilunate fracture dislocation we
20:31
encounter. These stages highlight the extensive
20:33
damage possible beyond just the primary RCFD,
20:36
profoundly impacting function if not addressed
20:38
comprehensively. So, what does this all mean
20:41
for the clinician? These classifications, while
20:44
imperfect perhaps, clearly highlight the need
20:46
to look beyond the obvious and consider the full
20:49
spectrum of injury. It's not just a dislocation,
20:51
it's what else has been disrupted and the sequence
20:53
of that disruption. Once the injury is thoroughly
20:56
assessed and classified, the next critical step
20:59
is management. What are the current approaches,
21:01
both conservative and operative, and what evidence
21:04
guides these often complex decisions? Precisely.
21:07
The initial management is immediate and critical,
21:09
often in the emergency department. The primary
21:12
goal, as soon as the patient presents, is to
21:14
perform an immediate reduction of the dislocation.
21:18
This is paramount, not just to alleviate pain,
21:21
but to prevent further neurovascular injury.
21:24
Remember, those nerves and vessels are stretched
21:26
and to facilitate subsequent imaging by normalizing
21:29
the anatomy somewhat. Immediate reduction can
21:32
make a real difference to nerve recovery. Our
21:34
overarching objective is meticulous restoration
21:37
of wrist anatomy, paying particular attention
21:39
to the radial and ulnar styloids, and crucially,
21:43
restoring the precise length of the attached
21:44
ligaments. This anatomical restoration confers
21:47
stability and is directly linked to positive
21:49
long -term outcomes. Good results are achievable
21:52
with concentric reduction, treatment of intracarpal
21:54
injuries, and sound repair of bone and ligament
21:56
damage. So immediate reduction first. Is non
21:59
-operative management ever an option? Well...
22:01
For non -operative management, the indications
22:03
are quite specific and, frankly, limited for
22:05
true RCFDs. It's typically reserved for patients
22:08
not medically stable for surgery, or in those
22:12
exceptionally rare cases where a truly stable
22:14
radiocarple joint is achieved after a perfect
22:16
closed reduction, confirmed by stress imaging.
22:19
The technique involves longitudinal axial traction,
22:22
then casting for up to six weeks, usually a sugar
22:25
tongue or long arm cast, allowing ligamentous
22:28
scarring. While historically some purely ligamentous
22:31
injuries did okay with this, especially in older,
22:34
low -demand patients, it's associated with common
22:36
persistent instability, like ulnar translation
22:39
and reduced range of motion. So generally not
22:42
the first choice for these high -energy injuries?
22:44
Generally not. For a high -energy RCFD, non -operative
22:48
management is almost always considered suboptimal
22:50
due to the high risk of chronic instability,
22:52
stiffness, and post -traumatic arthritis. Which
22:54
leads us to surgery. It's exactly. Operative
22:56
management is widely considered the standard
22:58
of care for virtually all RCFDs. The main indications
23:02
are an irreducible dislocation, We can't get
23:05
it back in place closed or an unstable joint
23:08
after attempted closed reduction, where it simply
23:10
won't stay reduced. The general approach involves
23:13
open reduction, internal fixation, or RRF, often
23:17
with radiocarpal pinning and meticulous ligament
23:19
repair. The goal is stable fixation, allowing
23:23
early, protected motion. Okay, let's get on to
23:25
the surgical techniques. What approaches do you
23:27
typically use? When it comes to surgical approaches,
23:30
we often utilize a Voller -Henry approach to
23:32
the distal radius. This offers advantages. Nerve
23:35
decompression if needed, fasciotomy access, direct
23:38
repair of those crucial volar ligaments, and
23:41
good access for radial styloid fixation. However,
23:44
it's often not sufficient alone. A dorsal approach
23:46
may also be necessary, particularly for dorsal
23:49
buttress plating, or to elevate impacted articular
23:51
fragments. In fact, a combined volar and dorsal
23:54
approach is frequently required. Surgeons shouldn't
23:56
hesitate to make that second dorsal incision
23:58
for adequate exposure and precise reduction of
24:01
all fragments. An inadequate approach risks a
24:03
poor outcome. Right. Do what's needed for full
24:06
visualization and reduction. What about external
24:08
fixation? Provisional stability can be achieved
24:11
with external fixation. This is incredibly useful
24:15
acutely for restoring length, controlling an
24:17
unstable limb, protecting repairs, and allowing
24:20
early elbow forearm motion while the wrist is
24:22
held. It can be provisional before definitive
24:25
internal fixation, or sometimes definitive immobilization
24:28
for four to six weeks in complex cases or those
24:31
with significant soft tissue injury. And the
24:33
internal fixation itself. You mentioned three
24:35
columns earlier. Yes, a key principle is often
24:38
three -column fixation, addressing the radial,
24:40
intermediate, and ulnar columns. For the radial
24:44
column, radial styloid, robust fixation is crucial
24:47
due to that radioscapacitate ligament attachment.
24:50
We might use K -wires, compression screws, or
24:52
small plates, dorsal, volar, or radial. If it's
24:55
a small fragment or ligament avulsion, soft tissue
24:58
repair with suture anchors may be needed. Robust
25:01
repair here is paramount for stability. The intermediate
25:03
column lunity fast fixation typically uses interfragmentary
25:07
screws or tension band wires. Again, suture anchors
25:10
for ligamentous issues. Anatomical reduction
25:13
here is critical. Even a one two millimeter step
25:15
off risks significant arthritis. The ulnar column
25:18
distal ulnar styloid fixation is more controversial,
25:21
but indicated for DRUJ injury or persistent instability.
25:25
This might involve fixing an onostyloid fracture,
25:28
K -wire screw, tension band, or TSCC repair.
25:31
If the DRUJ is dislocated, it needs meticulous
25:33
reduction and often pinning in mid -supination
25:36
to maintain it while the TSCC heals. The DRUJ
25:39
is often the forgotten joint, but instability
25:40
there is debilitating. It sounds like addressing
25:43
all three columns comprehensively is key. It
25:45
often is. And ligament repair itself is a cornerstone,
25:48
often needing magnification. For volar extrinsic
25:52
ligaments, suture anchors can reattach them.
25:55
It's critical not to overtighten, which could
25:57
limit extension and cause stiffness. We must
25:59
also evaluate and repair other significant ligaments
26:02
if disrupted, like this scaffolding, leaving
26:04
that unstable leads to poor outcomes despite
26:07
good radiocarble repair. For impacted articular
26:10
fragments, bone grafting, examined from iliac
26:13
crest, might be needed to restore the joint surface.
26:16
And you mentioned nerve decompression earlier
26:18
too. Absolutely. Neurovascular decompression
26:20
is essential if there are neurological signs
26:23
pre -op or concern for compartment syndrome.
26:25
Typically achieved via the Palmer approach with
26:27
flexor retinaculum release. Critical for these
26:30
high energy injuries. That's a powerful combination
26:32
of techniques. really customizing the approach
26:35
to the specific injury. It sounds like the emphasis
26:38
is always on restoring that precise anatomical
26:40
alignment and stability. However, even with the
26:43
most meticulous surgical intervention, the journey
26:46
doesn't end there. What are the common complications
26:48
we need to anticipate, and what does the post
26:51
-treatment rehabilitation look like? It sounds
26:53
like it could be a long road. You're absolutely
26:55
right. Surgery is often just the beginning, and
26:58
vigilant post -treatment care is vital. After
27:01
operative repair, patients typically undergo
27:03
immobilization, averaging maybe five weeks, range
27:06
four to eight weeks, often in a splint or cast,
27:09
depending on surgical stability and soft tissue
27:11
repair. But even during immobilization, it's
27:13
crucial to start immediate, gentle, regular movement
27:16
of all uninvolved joints, shoulder, elbow, fingers,
27:20
thumb, to reduce swelling and prevent stiffness
27:22
elsewhere. Early motion is key. Keeping everything
27:25
else moving. Exactly. Once stability allows,
27:28
usually after pin removal or early radiographic
27:30
union, critical early hand exercises begin. Simple
27:33
finger curls, hook fist, tabletop position. For
27:36
the wrist itself, gentle, active and assisted
27:38
range of motion, flexion, extension, deviation,
27:41
pronation, supination introduced as soon as safe,
27:44
avoiding severe discomfort. Move to slight stretch,
27:47
not pain. Early on, we can begin isometric strengthening
27:50
contracting muscles without moving the joint.
27:52
As strength and comfort improve, typically 8
27:55
-12 weeks post -op, progress to isotonic exercises
27:58
with light weights or bands, gradually increasing
28:01
load. Controlled progressive loading is vital.
28:04
Sounds like a carefully staged rehab process.
28:06
What about potential pitfalls, complications?
28:09
Despite best efforts, complications can arise.
28:12
Acute carpal tunnel syndrome is frequent, especially
28:14
with delayed presentation or reduction. Persistent
28:16
or worsening nerve signs often need urgent carpal
28:19
tunnel release. Stiffness is also highly common.
28:22
Maybe 30 -40 % loss in wrist motion are reported.
28:25
Prolonged immobilization is a risk factor, but
28:27
also scarring. Treatment involves intensive hand
28:29
therapy, maybe manipulation under anesthesia,
28:32
or hardware removal if it's impeding motion.
28:34
That's a significant loss of motion potentially.
28:36
It can be. Post -traumatic arthritis is a significant
28:40
long -term risk, especially with non -anatomic
28:43
reduction or chronic instability. That articular
28:46
step -off greater than 2 millimeters is strongly
28:48
associated with late osteoarthritis. We also
28:52
need awareness of late intercarpal disruption
28:54
from occult injuries becoming apparent later.
28:57
While many neurological deficits resolve after
28:59
reduction decompression, some may persist, like
29:01
residual numbness. And non -union or osteonecrosis
29:05
is a concern for associated scapoid fractures
29:07
due to its blood supply and neglected hook of
29:09
Hammett fractures. A lot to watch out for long
29:11
-term. What's the overall prognosis typically?
29:13
Turning to long -term outcomes, the good news
29:15
is that with early diagnosis, precise anatomical
29:18
repair, stable fixation, and good rehab, good
29:21
functional outcomes can generally be expected.
29:24
Reviews show promising results. One study reported
29:27
mean flexion extension arc of 100 degrees, grip
29:29
strength 86 % of the other side. That's excellent
29:33
given the injury severity. Many patients resume
29:35
prior occupations, even high demand ones. However,
29:39
open injuries and dumontia type 2 injuries historically
29:41
show less favorable results, often needing more
29:44
rehab and having higher complication rates. We
29:47
use outcome scores like quick dash, PWRE to assess
29:50
function, pain, motion, grip strength. Scores
29:53
over 65 often considered satisfactory. Interestingly,
29:57
clinical scores and x -ray changes don't always
29:59
correlate perfectly with patient -reported function.
30:02
Someone might have arthritis on x -ray but feel
30:04
fine functionally or vice versa. That's an interesting
30:06
point about the disconnect sometimes between
30:08
imaging and function. It is. And in some refractory
30:11
cases with persistent instability or severe arthritis,
30:14
secondary interventions like radial loon fusion
30:16
or even total wrist fusion might be needed as
30:18
a salvage procedure later on. That's a truly
30:21
comprehensive overview, highlighting both the
30:23
successes we can aim for and the significant
30:25
challenges demanding ongoing vigilance. This
30:29
raises an important question. For our listeners
30:32
working with these patients, what's the key takeaway
30:34
or perhaps a thought to provoke deeper consideration
30:37
on this challenging topic? What's the one thing
30:39
you'd want them to carry forward? For our colleagues,
30:42
I think the critical importance lies in a thorough,
30:45
really deep understanding of the wrist anatomy.
30:47
A judicious, multimodality imaging approach,
30:50
remembering x -rays, are just the start and implementing
30:53
tailored, meticulous surgical strategies. While
30:56
these injuries are rare and complex, precise
30:59
diagnosis and rigorous anatomical restoration
31:01
are absolutely paramount to mitigating those
31:04
long -term problems like post -traumatic arthritis
31:06
and chronic instability. It's about restoring
31:08
not just form but critical function and remembering
31:11
the long game for the patient. That's a powerful
31:13
message, thank you. This deep dive has truly
31:16
laid bare the complexities and the critical pathways
31:18
for managing these significant wrist injuries.
31:22
As we move forward in orthopedic practice, perhaps
31:25
the next frontier lies not just in achieving
31:27
perfect initial reduction, but in truly understanding
31:30
the subtle individual biomechanical responses
31:34
to these high -energy traumas, allowing us to
31:37
predict and prevent long -term functional impairments
31:39
with even greater precision. What more can we
31:42
learn from the patient journey beyond the initial
31:44
fracture? And how can we leverage emerging technologies
31:48
to better understand those long -term adaptations?
31:51
If you found this discussion insightful, please
31:53
take a moment to rate and share Deep Dive Ortho
31:56
with your colleagues. It helps us reach more
31:57
dedicated professionals like yourselves. Thank
32:00
you again for your invaluable expertise and insights
32:02
today. My pleasure entirely. Thank you for having
32:04
me. And thank you for joining us on Deep Dive
32:06
Ortho. We'll be back soon with another exploration
32:08
into the fascinating world of orthopedics.