Extremity Trauma Initial Management

Immediate Management: Prehospital and in the Emergency Department

• Trauma to the extremities, including injuries to nerves, vessels, bones, muscles, ligaments, tendons, and skin, represents one of the most common patterns of traumatic injury. It is estimated that up to 60% of traumatically injured patients sustain some form of extremity injury.¹ Early recognition and management are essential to prevent life-threatening hemorrhage, limb loss, long-term disability, and functional impairment.
• Mechanisms of injury include blunt force trauma, high-energy collisions, penetrating trauma, blast or explosion injuries, and crush mechanisms. Understanding the relationship between the mechanism of injury and the resulting injury pattern is critical for accurate diagnosis, guiding treatment strategies, and identifying associated injuries. This knowledge is essential for optimizing patient care and improving outcomes.
• Initial assessment should follow the Advanced Trauma Life Support (ATLS) xABCDE priorities: eXsanguinating hemorrhage, Airway, Breathing, Circulation, Disability, and Exposure. Life-threatening hemorrhage from extremity trauma must be rapidly identified and addressed during the primary survey.

Hemorrhage Control

Initial interventions to control bleeding include:

• Direct pressure
• Wound packing
• Tourniquet application
• Pelvic binder application when pelvic injury is suspected.
• Resuscitative endovascular balloon occlusion of the aorta (REBOA) may be considered for more proximal control, and this can be performed in the Emergency Department (ED) (for additional reading, see the OA summary on REBOA. Link)

Life-threatening hemorrhage may result from:

• Pelvic fractures
• Long-bone fractures (e.g., femoral shaft fractures)
• Traumatic amputations
• Extremity injuries involving major arterial disruption.
• Appropriate positioning, reduction, and splinting of injured limbs should be performed only by trained personnel to avoid worsening injuries.

Damage Control Resuscitation

Key components include:

• Permissive hypotension (when appropriate)
• Activation of massive transfusion protocols
• Administration of tranexamic acid (TXA): 1g bolus followed by 1g over 8 hours within 3 hours of injury² (for additional reading, see the OA summary on antifibrinolytics: Link).
• Damage control surgery (DCS) when needed.
• Early operative or endovascular hemorrhage control is a major determinant of survival. Transfer to the operating room (OR) or interventional radiology (IR) should be delayed only for life-saving stabilization.3 Active volume resuscitation using blood products (preferred) or crystalloid should begin immediately in unstable patients.

Pelvic Fractures Management

• Pelvic fractures most commonly occur after high-energy blunt trauma and are frequently associated with other significant injuries. Up to 50% of patients sustain concomitant internal injuries, emphasizing the need for a systematic and multidisciplinary approach to management.¹
• The pelvis can hold 4–6 liters of blood, and bleeding is usually venous, although arterial injury may occur. Approximately 10–15% of patients with pelvic fractures present to the ED in shock, and mortality may reach 32%.⁴

Management

• Pelvic stabilization – apply a pelvic sheet or commercial pelvic binder around the greater trochanters with the legs internally rotated. This should be done as early as possible, often in the prehospital environment.
• Initiate resuscitation with blood products or crystalloid as needed, in accordance with damage-control principles. If the patient remains persistently unstable, urgent involvement of orthopedic and trauma surgery is essential. Depending on institutional capability, REBOA may be considered in an unstable patient. Immediate preperitoneal pelvic packing may be performed as part of DCS to achieve rapid hemorrhage control.
• Consider TXA within 3 hours of injury as per major trauma guidelines.
• Imaging
  • Pelvis/chest X-ray (part of primary survey)
  • Focused Assessment with Sonography in Trauma (FAST) exam to assess for intraabdominal bleeding (part of primary survey)
  • Computed tomography (CT) scan for stable patients
  • If the patient stabilizes after resuscitation, IR should be consulted for angiography and embolization of bleeding vessels.
• The World Society of Emergency Surgery has published guideline on the classification and management of pelvic trauma, with the goal of restoring homeostasis and addressing the pathophysiologic disturbances associated with disruption of the mechanical stability of the pelvic ring.⁵

Major Arterial Injury and Traumatic Extremity Amputation Management

• Major vascular injury, including disruption of arteries, veins, or both, can result in significant hemorrhage and may present either as external hemorrhage or contained bleeding within soft tissues. Early recognition and rapid hemorrhage control are critical to prevent limb loss and death.

Management

• Early tourniquet placement is lifesaving in cases of uncontrolled extremity hemorrhage. (For additional reading, see the OA summary on Stop the Bleed. Link
  • Apply 2–3 inches (5–7 cm) above the injury site.
  • Avoid placing a tourniquet over a joint.
  • Typical inflation pressures: Upper extremity: > 250 mmHg; Lower extremity: > 400 mmHg
  • Document the time of application clearly.
  • If bleeding continues after the first tourniquet is applied, a second tourniquet may be applied directly above the first. Neither tourniquet should be removed. At the same time, continue to apply direct pressure over the wound to optimize hemorrhage control.
  • Reassess within 2 hours to determine whether partial deflation, reinflation, or alternative hemorrhage control techniques are required.
  • Tourniquet removal or adjustment should occur only when appropriate alternative hemorrhage-control strategies are available, and the clinical team is prepared for potential hemodynamic effects.
  • Muscle ischemic tolerance is limited. Therefore, timely restoration of perfusion is essential. Limb survival depends on:
    • Severity of initial injury
    • Ischemia time
    • Degree of shock
    • Associated soft tissue damage.
• Resuscitation with blood products and crystalloid solutions as indicated.
• For hemodynamically stable patients, CT angiography is the preferred modality to evaluate vascular injury and ongoing bleeding.
• Serial pulse checks, Doppler assessment, and ankle-brachial index or injured extremity index measurements aid in ongoing evaluation.
• Realignment and splinting of associated fractures may improve perfusion and reduce pain.
• Frequent neurovascular reassessments are required to detect evolving ischemia or compartment syndrome.
• Urgent surgical and/or vascular consultation (including transfer to a tertiary center) for OR exploration of bleeding vessels or damage control is usually required.
• Replantation of an amputated limb is a complex decision-making process focused on maximizing long-term functional outcomes rather than simply preserving the limb. The ATLS principle of “life over limb” emphasizes treating the greatest threat to life first. In cases of severe trauma, such as a mangled extremity accompanied by life-threatening injuries, primary amputation may be necessary to save the patient’s life, even when limb salvage might otherwise be technically feasible.

Tourniquet Physiology and Associated Complications

• Tourniquet application can be lifesaving in cases of life-threatening extremity hemorrhage. However, prolonged application can lead to significant metabolic derangements and systemic complications. Battlefield studies have shown high complication rates associated with extended tourniquet use.
• Physiologic Effects of tourniquet application:
  • Local ischemia and compression: Muscle and nerve ischemia increase with tourniquet duration, contributing to neurologic deficits and potential compartment syndrome.
  • Tourniquet inflation increases systemic vascular resistance (SVR) and effectively raises circulating blood volume and systolic arterial pressure. Bilateral thigh tourniquet application can increase effective circulating volume by up to 15% (approximately 750 mL in an adult) if the limbs are drained of blood. This can be a life-saving measure in a hemodynamically unstable patient.
  • Conversely, tourniquet deflation may cause a sudden decrease in SVR, transient hypotension, hypothermia, and arrhythmias. Both cardiac failure and cardiac arrest have been reported in the under-resuscitated patient.
  • Tourniquet deflation causes a rise in PaCO₂ as accumulated carbon dioxide from the ischemic limb enters the systemic circulation. Hyperventilation may be required to mitigate the deleterious effects of hypercapnia in trauma patients, especially in those with traumatic brain injury (TBI).
  • Tourniquet inflation promotes a global hypercoagulable state, whereas tourniquet deflation increases fibrinolysis by promoting the release of tissue plasminogen in response to limb acidosis and hypoxemia.
  • Tourniquet inflation may raise core body temperature, and deflation can cause a transient decrease due to redistribution of heat from the core to the extremity. Maintaining normothermia is critical in polytrauma patients.
• Complications of tourniquet application include nerve palsy, muscle ischemia requiring fasciotomy, compartment syndrome, rhabdomyolysis, acute kidney injury, and thromboembolic events.
• Ischemia-reperfusion injury occurs when prolonged tourniquet-induced limb ischemia leads to metabolic acidosis and cellular damage, and the subsequent restoration of blood flow triggers an inflammatory cascade. This process worsens tissue injury through oxidative stress, free radical formation, and endothelial dysfunction. These systemic changes also increase oxygen consumption and carbon dioxide production. These systemic effects can exacerbate multi-organ dysfunction in trauma patients.
• Posttourniquet syndrome is a reaction to prolonged limb ischemia, leading to subsequent increased vascular permeability resulting in interstitial and intracellular edema. It is characterized by muscle stiffness and weakness, pallor, joint stiffness, and paresthesia. Symptoms may persist for 1–6 weeks after tourniquet application.^6,7

Bilateral Femur Fracture Management

• Patients with multiple long-bone fractures, particularly bilateral femoral shaft fractures, face significantly increased risks of morbidity and mortality. These injuries are frequently associated with:
  • Major hemorrhage
  • Fat embolism
  • Pulmonary complications
  • Hemorrhagic shock and multi-organ failure

Management

• Rapid immobilization of fractured femurs: prehospital Thomas splint and Kendrick traction splint or external fixation with pins, or weight traction.
• Aggressive resuscitation, including early blood transfusion.
• Prevention of fat embolism syndrome through fracture stabilization.
• Early external or temporary stabilization is preferred in unstable patients, followed by definitive internal fixation when clinically appropriate.

Open and Closed Fractures and Other Musculoskeletal Injuries Management

• Open fractures can lead to rapid external blood loss and hemodynamic instability. Closed fractures may bleed into soft tissues more slowly but can progress to hemorrhage shock if left untreated.
• After initial stabilization and resuscitation, extremity injuries are reassessed during the secondary and tertiary surveys to ensure that no injuries are missed. Delayed diagnosis increases the risk of limb loss and other complications, including infection, neurovascular injury, and compartment syndrome.

Management

• Temporary reduction and stabilization (such as splints or external fixation) minimize pain, reduce bleeding, and facilitate safe transport and imaging. Definitive internal fixation can be performed as the patient’s clinical condition allows.
• Antibiotic administration is particularly important in open contaminated fractures.
  • Administer IV antibiotics within 1 hour of arrival to the ED.
  • A first-generation cephalosporin is typical for Gustilo–Anderson type I–II fractures.
  • Broader coverage is required for injuries involving heavy contamination or those related to farming, in accordance with local institutional protocols.
  • Delays greater than 3 hours significantly increase the risk of infection.¹
• Wound Management
  • Early irrigation and debridement in the ED or OR are essential.
  • Tetanus prophylaxis must be provided unless the patient is recently immunized or contraindicated.
  • Large or complex wounds may require staged debridement, negative-pressure therapy, or flap reconstruction in collaboration with plastic surgery. Hyperbaric oxygen therapy has been shown to accelerate wound healing and enhance angiogenesis.

• A Morel–Lavallée lesion is a closed traumatic degloving injury caused by shearing forces that separate the dermis from the underlying fascia. It is usually associated with high-energy mechanisms and underlying fractures. The space fills with hematoma, lymphatic fluid, or necrotic fat. It can lead to severe muscle damage and increase the risk of complications such as compartment syndrome.
• Clinical features include:
  • Ecchymosis
  • Skin hypermobility and fluctuance
  • Soft tissue swelling
  • Association with underlying fractures
  • Risk of infection or compartment syndrome

Management

• Compression dressings
• Image-guided drainage for fluid collections
• Operative irrigation and debridement for large, chronic, or recurrent lesions.