Management of Non-Reabsorbable Lower Limb Hematoma

Initial Assessment

The American College of Cardiology and other guideline societies recommend immediately assessing for "strong signs" of vascular injury, such as absent pulses, pallor, neurological motor or sensory deficits, or presence of a thrill/murmur, which mandate immediate surgical exploration or CT angiography 1
Evaluate for "weak signs" of vascular injury, such as non-pulsatile hematoma near arterial pathways, trauma near major vascular axes, or neurological deficits suggesting nerve compression, and perform CT angiography as these indicate occult vascular injury in 3-25% of cases 1, 2

Immobilize the affected limb immediately to prevent further injury and promote healing 1, 3
Apply ice packs to the hematoma site and place compression dressings to control bleeding and prevent expansion 1, 3

Confirmed vascular injury on imaging requires repair, and surgical evacuation should be performed promptly to avoid significant complications including tissue necrosis 1
Compartment syndrome development, indicated by increased pain, tense muscle, or nerve injury, requires fasciotomy, especially when compartment pressure is >30 mmHg 4, 5

Monitor closely for compartment syndrome development after any intervention or in conservative management, as compartment syndrome occurs when pressure >30 mmHg causes capillary and venule compression leading to muscle malperfusion 4, 5
Clinical evaluation for fasciotomy is prompted by increased pain, tense muscle, or nerve injury when intracompartment pressure measurement is unavailable, and fasciotomy should be considered for Category IIb ischemia when time to intervention is >4 hours 4, 5

Once bleeding is controlled and hemostasis achieved, initiate pharmacological thromboprophylaxis with LMWH, as early pharmacological thromboprophylaxis with LMWH is strongly recommended after hemorrhage control, with timing determined by injury type 1, 3
Adjust thromboprophylaxis for renal function, patient weight, and bleeding risk assessment to minimize the risk of venous thromboembolism 1

Do not miss compartment syndrome, and maintain a high index of suspicion and low threshold for fasciotomy when clinical signs develop, as compartment syndrome can lead to significant morbidity and mortality 4, 5
Do not underestimate injury severity in elderly patients, as ground-level falls can cause significant morbidity with lower vital sign thresholds needed for intervention 1