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Zorluk: OrtaSurgical and Procedural Interventions

A 72-year-old man presents to the emergency department with sudden, severe pain in his left lower leg that began 2 hours ago. He has a history of permanent atrial fibrillation but reports running out of his prescribed oral anticoagulant medication three weeks ago. On physical examination, his left foot and calf are pale and cool to the touch. The left femoral pulse is palpable, but the popliteal, dorsalis pedis, and posterior tibial pulses are absent to palpation and inaudible on continuous-wave Doppler ultrasound. Sensation is markedly decreased over the dorsum of the foot, and the patient is unable to move his toes. The right lower extremity is warm with strong distal pulses. Which of the following interventions are indicated for the immediate management of this patient? (Select all that apply)

  1. Initiation of a continuous intravenous unfractionated heparin infusionCevap
  2. Urgent open surgical thromboembolectomyCevap
  3. C
    Computed tomography angiography of the lower extremities
  4. D
    Catheter-directed intra-arterial thrombolysis
  5. E
    Observation with sequential Doppler ultrasound examinations

Cevap

The correct interventions are the initiation of a continuous intravenous unfractionated heparin infusion and urgent open surgical thromboembolectomy.
The correct interventions directly address the pathophysiology of acute limb ischemia in an immediately threatened extremity (Rutherford IIb). Intravenous unfractionated heparin provides rapid systemic anticoagulation to prevent the existing clot from propagating into stagnant distal collateral vessels. Because the patient already has a motor deficit (inability to move toes), the tissue is highly susceptible to irreversible infarction, necessitating immediate mechanical clot removal via urgent open surgical thromboembolectomy. Together, these steps form the standard perioperative and surgical management sequence for limb salvage.

Adım Adım Çözüm

1
Diagnose the acute condition based on the clinical presentation.
The patient's sudden onset of pain, pallor, pulselessness, paresthesias, and paralysis (inability to move toes) in the setting of unantagonized atrial fibrillation points to acute limb ischemia (ALI) secondary to an arterial embolus.
Accurate clinical diagnosis is the first step in determining the urgency and type of intervention required.
2
Stratify the severity of the ischemia.
The presence of a motor deficit (paralysis) and inaudible arterial Doppler signals classifies the limb as Rutherford category IIb (immediately threatened).
Severity classification dictates the acceptable timeframe for reperfusion and guides the choice between surgical and endovascular management.
3
Determine the mandatory concurrent medical and surgical interventions.
Immediate systemic anticoagulation with IV heparin must be started to halt clot propagation, followed rapidly by urgent surgical thromboembolectomy for definitive reperfusion.
Category IIb limbs cannot tolerate the time delays associated with imaging or catheter-directed thrombolysis.

Anahtar Kavram

Patients with acute limb ischemia presenting with profound sensorimotor deficits (Rutherford category IIb) require immediate systemic anticoagulation with intravenous heparin and urgent open surgical revascularization.
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Surgical and Procedural Interventions

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