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Zorluk: OrtaSurgical and Procedural Interventions

A 7272-year-old man is brought to the emergency department complaining of sudden-onset, severe pain in his right leg that began 33 hours ago. He has a history of atrial fibrillation but stopped taking his prescribed apixaban one month ago. On physical examination, the right leg is pale and cold to the touch. He exhibits profound motor weakness with an inability to dorsiflex the right toes. Sensation to light touch is absent over the dorsum of the right foot. Pulses are palpable in the bilateral femoral arteries but are absent in the right popliteal and pedal arteries by continuous-wave Doppler. The left leg examination is unremarkable. Which of the following are the most appropriate immediate interventions for this patient? (Select exactly two)

  1. Emergent open surgical embolectomyCevap
  2. Intravenous unfractionated heparin infusionCevap
  3. C
    Computed tomography angiography of the right lower extremity
  4. D
    Catheter-directed intra-arterial alteplase infusion
  5. E
    Admission to the medical telemetry unit for continuous anticoagulation observation

Cevap

The most appropriate immediate interventions are intravenous unfractionated heparin infusion and emergent open surgical embolectomy.
This patient presents with classic signs of acute limb ischemia (ALI) due to an arterial embolism, which likely originated from his unanticoagulated atrial fibrillation. His presentation of sensory loss (anesthesia over the dorsum of the foot) and motor weakness (inability to dorsiflex the toes) clinically classifies his condition as Rutherford category IIb, indicating an immediately threatened limb. In this emergent setting, the mandatory concurrent interventions are the immediate initiation of an intravenous unfractionated heparin infusion to prevent secondary thrombus propagation, and an emergent open surgical embolectomy to rapidly restore perfusion. Delaying surgical revascularization in a Category IIb limb risks irreversible tissue necrosis, compartment syndrome, and subsequent amputation.

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1
Identify the clinical presentation and diagnosis.
The patient has sudden-onset pain, pallor, pulselessness, paresthesias, and paralysis (the classic signs of acute limb ischemia) with a likely embolic source from atrial fibrillation.
Diagnosing acute limb ischemia is primarily clinical and dictates the urgency of intervention.
2
Classify the severity of the acute limb ischemia.
The presence of sensory loss and profound motor weakness categorizes this as Rutherford class IIb, an immediately threatened limb.
The classification determines whether the patient has time for advanced imaging and slow pharmacologic therapies, or if they require immediate operative rescue.
3
Select the appropriate concurrent medical and procedural interventions.
Systemic anticoagulation with heparin must be started immediately, followed directly by transportation to the operating room for an open surgical embolectomy.
Heparin prevents clot propagation, while surgery rapidly extracts the embolus to restore perfusion before irreversible tissue damage occurs.

Anahtar Kavram

Management of Rutherford Class IIb Acute Limb Ischemia
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Konular

Surgical and Procedural Interventions

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