Extremity Vascular Trauma, Limb Salvage, and Compartment Syndrome

65.1Treat the limb and the life together

Extremity vascular trauma is managed well only when hemorrhage control, restoration of perfusion, skeletal stability, soft-tissue viability, and long-term function are considered at the same time. The first operative question is not “open or endovascular?” but whether the patient has uncontrolled bleeding, threatened life, threatened limb, or a stable injury that can tolerate imaging and deliberate planning. Hard signs—active pulsatile bleeding, expanding hematoma, palpable thrill, audible bruit, and distal ischemia—should be documented explicitly because they move the patient directly to hemorrhage control and operative or endovascular intervention rather than prolonged diagnostic work-up. EAST penetrating extremity trauma PMG 2012 · AAST EAST lower 2023 · AAST PROOVIT registry (DuBose) 2015 · Low compartment pressure 2019 Soft signs—small hematoma, bleeding reported at the scene, or a wound near a named artery—should trigger Ankle-Brachial Index measurement, with an ABI below 0.9 prompting CT angiography to define occult arterial injury in a stable patient.

The surgeon’s record should preserve the elements that later explain both the decision and the outcome: mechanism, side and level of injury, hard or soft signs, ABI when applicable, initial neurologic examination, estimated warm ischemia time, associated fracture or dislocation, soft-tissue contamination, venous injury, and whether hemorrhage control, shunt placement, definitive repair, fasciotomy, or amputation was performed. Contemporary limb-salvage literature emphasizes that ischemia interval, fracture or dislocation pattern, neurologic deficit, soft-tissue injury, and the limits of score-driven amputation decisions should be documented because they shape both salvage strategy and later function Mangled Extremity Severity 2023 · Blunt popliteal artery 2022 · Limb Salvage 2022.

Prehospital hemorrhage control is part of the vascular operation, not a separate episode. A properly applied tourniquet for life-threatening extremity bleeding can preserve the patient long enough to allow vascular reconstruction and is associated in observational cohorts with improved limb and functional outcomes compared with delayed application. In the receiving hospital, the tourniquet time, distal temperature and motor-sensory examination, and any interval restoration or loss of pulses should be recorded because those details affect the urgency of revascularization, the decision for prophylactic fasciotomy, and the later interpretation of muscle injury. EAST penetrating extremity trauma PMG 2012 · AAST EAST lower 2023 · Prehospital tourniquet application 2023 · AAST PROOVIT registry (DuBose) 2015 · Low compartment pressure 2019

The priority sequence is clearest when the patient has shock, active hemorrhage, or a rapidly ischemic limb: control hemorrhage, restore temporary or definitive inflow and outflow, decompress when indicated, and then consolidate skeletal and soft-tissue management. Temporary intravascular shunts are most useful when definitive vascular reconstruction will be delayed by physiological exhaustion, mass-casualty constraints, contamination, transfer, or the need for staged orthopedic stabilization. The rationale is practical: shunts can rapidly restore distal perfusion, registry data show favorable patency at exchange in most cases, and trauma consensus reviews support their role as temporary bridges when physiology or skeletal stabilization must precede definitive repair. EAST penetrating extremity trauma PMG 2012 · AAST PROOVIT analysis 2018

Warm ischemia time is a central decision variable. Ischemia beyond six hours is associated with sharply increased amputation risk, and ischemia exceeding four to six hours is a threshold at which prophylactic fasciotomy should be strongly considered after repair, particularly when the injury is high energy or accompanied by combined arterial and venous injury. These thresholds are not substitutes for clinical judgment: a cold, insensate limb after prolonged shock, crush, venous obstruction, or delayed recognition may require fasciotomy or reassessment even when the clock is uncertain. EAST penetrating extremity trauma PMG 2012 · AAST EAST lower 2023 · AAST PROOVIT registry (DuBose) 2015 · Low compartment pressure 2019

Blunt popliteal artery injury after tibiofemoral trauma illustrates the need to treat the limb and the life together. EAST penetrating extremity trauma PMG 2012 · Blunt popliteal artery 2022 When ischemia is advanced, a vessel-first strategy prioritizes restoration of distal perfusion, with skeletal fixation deferred until flow is re-established; when gross instability threatens the vascular repair or when combined teams are immediately available, skeletal stabilization and vascular repair can be sequenced to minimize added ischemia time. The operative plan should state why vessel-first or bone-first sequencing was chosen, because delayed perfusion in the popliteal segment carries a high functional and amputation penalty.

The mangled extremity decision should not be delegated to a score. The Mangled Extremity Severity Score and related tools have inconsistent predictive performance in modern vascular trauma, particularly in popliteal artery injury and in settings where microsurgical, nerve, and soft-tissue reconstruction may alter functional potential. A defensible decision integrates ischemia time, muscle viability, soft-tissue coverage options, contamination, age, comorbidity, major nerve injury, patient preference when available, and the rehabilitation resources needed for recovery. AAST EAST lower 2023 · Primary amputation 2015 · Mangled Extremity Severity 2023 · Limb Salvage 2022

The compartment syndrome assessment begins before the incision and continues after revascularization. Acute compartment syndrome in tibial fracture and vascular trauma cannot be excluded by a single pressure measurement, because confirmed cases may show variable pressures, low measured pressures, and elevated myoglobin. A conventional 30 mmHg threshold is often cited but has limited specificity; the decision must incorporate ischemia time, reperfusion, swelling, pain pattern, neurologic change, venous injury, fracture, and the consequences of missing the diagnosis. EAST penetrating extremity trauma PMG 2012 · AAST EAST lower 2023 · AAST PROOVIT registry (DuBose) 2015 · Low compartment pressure 2019

Major nerve injury is often the dominant determinant of whether a salvaged limb will be useful. A technically successful arterial repair may leave the patient with a painful, insensate, unstable, or nonfunctional limb when sciatic, tibial, peroneal, brachial plexus, or other major neural injury prevents meaningful sensorimotor recovery. In upper-limb trauma, salvage is usually feasible when nerve and soft-tissue substrate permit, whereas amputation becomes more appropriate when extensive nerve loss precludes useful function. EAST penetrating extremity trauma PMG 2012 · AAST EAST lower 2023 · Primary amputation 2022 · Upper extremity vascular 2024 · Limb Salvage 2022

When lower-extremity fasciotomy is required, the objective is complete decompression, not simply opening the most swollen area. Trauma fasciotomy of the leg uses a two-incision four-compartment release of the anterior, lateral, superficial posterior, and deep posterior compartments to reduce missed-compartment risk. EAST penetrating extremity trauma PMG 2012 · Postoperative rehabilitation compartment 2023 Postoperative care then becomes part of limb salvage: early motion, serial dressing changes, staged wound management, and delayed closure or skin grafting are common when fasciotomy wounds remain open for several days.

65.2Open and endovascular are complementary

Open repair and endovascular repair should be viewed as complementary tools selected according to physiology, anatomy, injury morphology, contamination, ischemia time, and the ability to surveil the repair. Open repair remains the default for popliteal and below-knee traumatic arterial injuries, particularly when there is transection, thrombosis, crush, combined orthopedic injury, or a need for fasciotomy and direct muscle assessment. Endovascular repair has an expanding role for selected focal lesions in stable patients, especially non-popliteal injuries and anatomically difficult proximal exposures. EAST penetrating extremity trauma PMG 2012 · Systematic review meta-analysis 2024

The open operation is favored when rapid control, direct debridement, shunting, venous repair, or bypass is required. Autogenous vein, usually great saphenous vein from the contralateral leg, is the default conduit for extremity vascular reconstruction in trauma. EAST penetrating extremity trauma PMG 2012 · AAST PROOVIT registry (DuBose) 2015 Synthetic conduit is reserved for selected circumstances such as noninfected upper-extremity or proximal lower-extremity reconstruction, and patch repair is best suited to focal lesions rather than extensive segmental injury.

The surgeon should decide early whether the operation is damage-control or definitive. In a physiologically exhausted patient, a patient with major contamination, a casualty surge, or an unstable fracture that must be temporized, shunt placement can be the correct vascular operation. Shunts are used predominantly in lower-extremity vascular trauma with associated long-bone or soft-tissue injury, and registry experience reports favorable patency at the time of exchange in most patients. EAST penetrating extremity trauma PMG 2012 · AAST PROOVIT analysis 2018

Forward and austere settings reinforce the same principle. Locked temporary vascular shunts used in wartime settings can permit transport survival when placed before evacuation, supporting shunt availability in forward surgical teams and other systems where definitive vascular reconstruction may occur at a higher echelon of care. Locked Temporary Vascular 2016 The operative note should identify the shunted vessel, whether inflow and outflow were restored, the fixation method, distal perfusion after placement, associated venous injury, fasciotomy status, and the intended timing of exchange.

Endovascular treatment is most appropriate when the patient is stable, the lesion is focal, access can be obtained safely, and the target artery is large enough and anatomically suitable for a covered stent. Selected upper-extremity and proximal lower-extremity injuries, including axillary, subclavian, and common iliac lesions, may be treated with covered stent grafts to reduce morbidity from difficult exposure. This approach requires a plan for access-site management, confirmation of inflow and outflow, and follow-up surveillance because the initial technical success does not eliminate later repair failure. EAST penetrating extremity trauma PMG 2012 · Systematic review meta-analysis 2024

The popliteal artery is a special case. Open repair remains the usual default because the injury is often associated with knee dislocation, tibiofemoral trauma, thrombosis, intimal disruption, venous injury, and compartment risk. When orthopedic stabilization and vascular repair compete for time, the order should be chosen according to ischemia duration, the severity of instability, and team configuration; combined orthopedic and vascular teams can shorten total ischemic delay by sequencing stabilization and revascularization deliberately rather than serially. EAST penetrating extremity trauma PMG 2012 · Blunt popliteal artery 2022

Upper-extremity vascular trauma requires the same disciplined selection. Brachial and axillary arterial injuries are treated with proximal control through appropriate exposure and with primary repair, vein interposition, or covered stent for selected proximal lesions. Associated brachial plexus injury and venous injury shape the functional result, so a patent repair should not be mistaken for complete recovery. EAST penetrating extremity trauma PMG 2012 · Upper extremity vascular 2024

Venous injury deserves an explicit plan. When feasible, primary venous repair or interposition is preferred because reconstruction may reduce early venous hypertension and edema; ligation is reserved for unstable patients or situations where repair is not practical. The postoperative plan should anticipate swelling, wound management, fasciotomy implications, and the need to distinguish expected edema from recurrent ischemia or evolving compartment syndrome. EAST penetrating extremity trauma PMG 2012 · AAST PROOVIT registry (DuBose) 2015

On-table angiography is useful when direct exploration alone does not answer the clinical question. It can confirm inflow and outflow, identify occult distal injury, and guide selective branch embolization when required. In stable patients with soft signs or ABI below 0.9, CT angiography is the preferred preoperative imaging test; digital subtraction angiography is used selectively when an intervention is anticipated or when intraoperative clarification will change the repair. EAST penetrating extremity trauma PMG 2012 · AAST EAST lower 2023 · AAST PROOVIT registry (DuBose) 2015 · Low compartment pressure 2019

Compartment syndrome prevention is a repair decision as much as a postoperative diagnosis. Prophylactic fasciotomy should be considered after prolonged ischemia of more than four to six hours, high-energy injury, combined arterial and venous injury, or substantial reperfusion risk. Delayed fasciotomy after a missed diagnosis is associated with limb loss, and the morbidity of an unnecessary fasciotomy must be weighed against the consequence of failing to decompress a reperfused limb. EAST penetrating extremity trauma PMG 2012 · AAST EAST lower 2023 · AAST PROOVIT registry (DuBose) 2015 · Postoperative rehabilitation compartment 2023 · Low compartment pressure 2019

Post-fasciotomy management determines whether the vascular repair ultimately yields a functional limb. Early motion, serial dressing changes, prolonged wound care, and delayed closure or skin grafting are common after fasciotomy wounds remain open for several days. EAST penetrating extremity trauma PMG 2012 · Postoperative rehabilitation compartment 2023 Rehabilitation should begin as soon as the wound and repair permit, because stiffness, edema, weakness, and soft-tissue failure may compromise a technically successful reconstruction.

Iatrogenic injuries should be approached with the same urgency as battlefield or civilian trauma. Popliteal artery injury after arthroscopic knee surgery is uncommon but recognized; delayed recognition is associated with higher rates of compartment syndrome and amputation. Popliteal Artery Injury 2025 Postoperative pulse change, calf pain, compartment swelling, or unexplained neurologic symptoms after knee arthroscopy should prompt urgent vascular assessment rather than observation alone.

65.3REBOA access can become extremity trauma

REBOA is used for truncal hemorrhage, but its access site can create or compound extremity vascular trauma. Distal limb ischemia and femoral access-site injury recur across reports of REBOA complications, with sheath size, balloon time, and operator experience described as dominant modifiable risk factors. The vascular surgeon evaluating a patient after REBOA should treat the access limb as a potential injured extremity, not as a routine puncture site. Complications associated use 2024

The post-REBOA limb examination should be systematic: document the access side, sheath size when known, balloon duration when known, pulses, Doppler signals, skin temperature, motor and sensory status, groin hematoma, expanding swelling, and whether additional femoral manipulation or angiography is planned. Any loss of distal perfusion, expanding access-site hematoma, limb coolness, new neurologic deficit, or compartment concern should escalate evaluation from surveillance to urgent imaging, operative exploration, endovascular repair, or fasciotomy depending on physiology and anatomy. EAST penetrating extremity trauma PMG 2012 · AAST EAST lower 2023 · AAST PROOVIT registry (DuBose) 2015 · Complications associated use 2024 · Low compartment pressure 2019

Access planning after REBOA matters because the artery used for balloon control may no longer be the safest route for downstream angiography or intervention. Alternative vascular access for angiography after REBOA is a workflow priority; the contralateral femoral, brachial, or radial artery may be safer depending on body habitus, injury pattern, shock state, and the condition of the original femoral access site. Safety speed Assessing 2025 · Complications associated use 2024 The decision should be made before repeated puncture or sheath upsizing compounds the injury.

REBOA-related extremity injury also changes limb-salvage planning. A groin access injury with distal ischemia should be assessed by the same criteria used for other extremity arterial injuries: hard signs require immediate control; soft signs require ABI and selective CTA; evolving compartment syndrome after ischemia or reperfusion requires prompt decompression when indicated. When the access limb has also been exposed to shock, massive resuscitation, vasopressor physiology, or prolonged occlusion, the threshold for serial examination should be low. EAST penetrating extremity trauma PMG 2012 · AAST EAST lower 2023 · AAST PROOVIT registry (DuBose) 2015 · Complications associated use 2024 · Low compartment pressure 2019

Massive resuscitation may create a second compartment problem in the abdomen while the team is focused on the limb. Intra-abdominal hypertension is defined as sustained intra-abdominal pressure above 12 mmHg, and abdominal compartment syndrome as pressure above 20 mmHg with new organ failure. Prevention after massive resuscitation includes restrictive crystalloid use, balanced product resuscitation, prompt definitive hemorrhage control, and consideration of open-abdomen damage-control closure when pressures rise above consensus thresholds. Intra-abdominal hypertension abdominal 2013

Compartment pressure thresholds in abdominal-limb injury

The relationship between abdominal compartment syndrome and extremity vascular repair is practical. Rising intra-abdominal pressure, ongoing shock, and delayed hemorrhage control can impair distal perfusion, increase edema, and complicate assessment of the repaired limb. A patient with REBOA exposure, major transfusion, and extremity revascularization therefore requires parallel surveillance of the access site, the treated limb, and global physiology rather than isolated inspection of the bypass or stent. Intra-abdominal hypertension abdominal 2013 · Complications associated use 2024

65.4Clinical integration, follow-up, and evidence boundaries

The bedside algorithm is simple but must be executed without drift. Hard signs of extremity vascular injury mandate operative or endovascular control. Soft signs require ABI, and ABI below 0.9 should trigger CT angiography in a stable patient. If imaging shows a lesion requiring treatment, the surgeon must then decide between open repair, endovascular repair, shunt-first damage control, fasciotomy, venous repair or ligation, and orthopedic sequencing. EAST penetrating extremity trauma PMG 2012 · AAST EAST lower 2023 · AAST PROOVIT registry (DuBose) 2015 · Low compartment pressure 2019

Follow-up begins intraoperatively. Before leaving the operating room, the team should confirm inflow, outflow, distal perfusion, neurologic status when assessable, venous management, fasciotomy status, and whether on-table angiography has excluded occult distal injury. This is especially important after shunt placement, popliteal repair, proximal covered stenting, combined arterial and venous injury, or repair in the setting of high-energy fracture or dislocation. EAST penetrating extremity trauma PMG 2012 · AAST EAST lower 2023 · Blunt popliteal artery 2022 · AAST PROOVIT registry (DuBose) 2015 · Low compartment pressure 2019

Registry and meta-analytic data support several practical principles but do not remove the need for surgeon judgment. Extremity vascular trauma cohorts are dominated by penetrating mechanisms, lower-extremity injuries, and frequent concomitant orthopedic injury; definitive repair achieves acceptable limb salvage in most patients, but outcomes vary by ischemia time, anatomy, associated soft-tissue injury, and center capabilities. Observational data also suggest that center volume and trauma-vascular surgeon presence may support limb salvage, although causal attribution to volume alone is limited by case-mix. EAST penetrating extremity trauma PMG 2012 · AAST EAST lower 2023 · AAST PROOVIT registry (DuBose) 2015

The lower-extremity repair should be followed as a limb, not merely as a conduit. Swelling, pain, neurologic change, recurrent coolness, absent Doppler signal, wound contamination, graft exposure, delayed closure, and infection risk all change the treatment plan. Fasciotomy wounds require planned dressing changes, early motion, delayed closure or grafting when needed, and coordination with rehabilitation, because limb salvage without function is an incomplete endpoint. EAST penetrating extremity trauma PMG 2012 · Primary amputation 2015 · Postoperative rehabilitation compartment 2023 · Limb Salvage 2022

Functional prognosis must be discussed early and revisited honestly. Systematic reviews of mangled extremity management show overlapping long-term functional outcomes between primary amputation and limb salvage, with the observed difference depending on scoring system and follow-up duration. The clinical conversation should therefore focus on likely sensorimotor recovery, soft-tissue coverage, infection control, number of operations, rehabilitation burden, patient goals, and the feasibility of a durable, usable limb. AAST EAST lower 2023 · Primary amputation 2022 · Primary amputation 2015 · Limb Salvage 2022

Post-limb-salvage rehabilitation and wound management

Upper-extremity trauma has a different functional calculus. Salvage is often reasonable when arterial reconstruction, soft-tissue coverage, and nerve substrate can support meaningful use; amputation is favored when extensive nerve loss makes useful recovery unlikely. Primary amputation 2022 Brachial plexus injury may dominate outcome after axillary or brachial arterial trauma, so postoperative counseling should separate vascular patency from hand function. EAST penetrating extremity trauma PMG 2012 · Upper extremity vascular 2024

The surgeon should not overstate the predictive value of scoring systems. The Mangled Extremity Severity Score does not reliably predict amputation in popliteal artery injury cohorts, and related tools remain under scrutiny because modern reconstruction has changed the boundary between technically salvageable and functionally worthwhile limbs. Mangled Extremity Severity 2023 · Limb Salvage 2022 Scores may structure discussion, but they should not replace individualized assessment of ischemia, muscle viability, nerve injury, soft tissue, comorbidity, patient values, and rehabilitation access. AAST EAST lower 2023

Selective fasciotomy is a continuing follow-up decision. Prolonged ischemia of more than four to six hours, high-energy injury, and combined arterial and venous injury justify prophylactic decompression; after repair, the team must continue to watch for compartment swelling, pain, neurologic change, myoglobin-associated muscle injury, and loss of distal perfusion. Because pressure measurements can be misleading, clinical context remains the reference point. EAST penetrating extremity trauma PMG 2012 · AAST EAST lower 2023 · AAST PROOVIT registry (DuBose) 2015 · Low compartment pressure 2019

Shunt-first care requires a defined endpoint. Temporary shunts are a bridge during physiologic exhaustion, staged orthopedic stabilization, mass-casualty conditions, or transfer; they are not a substitute for definitive vascular reconstruction once the patient, limb, and team are ready. At exchange, patency, distal runoff, soft-tissue viability, venous injury, need for fasciotomy, and conduit choice should be reassessed rather than assuming that the definitive repair plan is unchanged from the initial operation. EAST penetrating extremity trauma PMG 2012 · AAST PROOVIT analysis 2018 · Locked Temporary Vascular 2016

The evidence boundary is important. Much of extremity vascular trauma practice is informed by observational registry data, military experience, systematic reviews of heterogeneous cohorts, and expert guideline synthesis. These sources consistently support rapid hemorrhage control, ABI-driven selective imaging, early restoration of flow, autogenous conduit when feasible, damage-control shunting when definitive repair will be delayed, fasciotomy for prolonged ischemia or high-risk injuries, and individualized limb-salvage decisions rather than score-driven amputation. EAST penetrating extremity trauma PMG 2012 · Systematic review meta-analysis 2024 · AAST EAST lower 2023 · AAST PROOVIT registry (DuBose) 2015 · Low compartment pressure 2019

European and military experiences complement civilian registry data by emphasizing damage-control vascular surgery, temporary shunting, transportable vascular control, and selective fasciotomy in systems where injury mechanism, evacuation time, and operative resources differ from civilian trauma centers. The shared principle is that the repair strategy must match the patient’s physiology and the limb’s remaining functional substrate. EAST penetrating extremity trauma PMG 2012 · Locked Temporary Vascular 2016

Finally, delayed recognition remains one of the avoidable causes of poor outcome. Popliteal artery injury after arthroscopy, occult arterial injury after soft-sign penetrating trauma, access-site injury after REBOA, and compartment syndrome after reperfusion all require active surveillance rather than reassurance from an initially acceptable examination. The safest follow-up plan states exactly what finding will trigger escalation: ABI below 0.9, loss of Doppler signal, expanding hematoma, new neurologic deficit, worsening swelling, persistent calf pain after knee intervention, or evidence of distal ischemia. EAST penetrating extremity trauma PMG 2012 · AAST EAST lower 2023 · Popliteal Artery Injury 2025 · AAST PROOVIT registry (DuBose) 2015 · Complications associated use 2024 · Low compartment pressure 2019