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Zorluk: OrtaCardiothoracic and Vascular Surgery

A 72-year-old male with a history of poorly controlled type 2 diabetes mellitus and tobacco use disorder is evaluated in the outpatient vascular surgery clinic for worsening right foot pain. Over the past month, he has experienced a continuous, burning ache in his right toes that frequently awakens him from sleep. He notes that the pain is somewhat alleviated by sitting up and dangling his foot over the edge of the bed. Physical examination of the right lower extremity demonstrates cool, shiny, and hairless skin. There is a 1.5-cm, well-demarcated, dry ulcer with a pale base located on the tip of the great toe. Palpation of the right femoral pulse is normal, but the popliteal, dorsalis pedis, and posterior tibial pulses are absent. Capillary refill time in the toes is 5 seconds. The ankle-brachial index is 0.35 on the right. Which of the following is the most appropriate next step in the management of this patient?

  1. Computed tomography angiography of the lower extremitiesCevap
  2. B
    Initiation of a supervised, graded treadmill exercise program
  3. C
    Prescription of a broad-spectrum intravenous antibiotic regimen
  4. D
    Application of a multilayer compression wrap to the lower leg
  5. E
    Immediate scheduling for a below-knee amputation

Cevap

Computed tomography angiography of the lower extremities is the most appropriate next step to plan for limb-salvaging revascularization.
The correct answer is to perform computed tomography angiography of the lower extremities. This patient presents with the classic triad of critical limb ischemia (CLI): ischemic rest pain (burning pain at night, relieved by gravity/hanging the foot), tissue loss (dry, well-demarcated arterial ulcer), and objective evidence of severe perfusion deficit (ABI < 0.4). CLI is an advanced stage of peripheral arterial disease with a high risk of limb loss. While intermittent claudication is initially managed with risk factor modification and supervised exercise, CLI requires urgent surgical or endovascular revascularization. To plan the revascularization strategy, the vascular surgeon must define the exact location and extent of the arterial occlusions using cross-sectional imaging such as CTA or MRA.

Adım Adım Çözüm

1
Analyze the patient's symptoms and history.
The patient has a history of burning foot pain at night (rest pain) relieved by dependency, a hallmark of severe arterial insufficiency.
Identifying the nature of the pain helps differentiate between claudication (exertional) and critical limb ischemia (rest).
2
Evaluate the physical examination findings.
Cool, shiny, hairless skin, absent distal pulses, and a dry arterial ulcer on the great toe indicate severe chronic ischemia with tissue loss.
Tissue loss confirms the diagnosis of critical limb ischemia (CLI).
3
Interpret the objective diagnostic data.
The ankle-brachial index (ABI) is 0.35, which is < 0.4.
An ABI < 0.4 provides objective confirmation of severe peripheral arterial disease consistent with CLI.
4
Determine the appropriate management protocol.
CLI represents an imminent threat to limb viability. The priority is revascularization, which requires precise imaging of the arterial anatomy via CTA, MRA, or conventional angiography.
Unlike claudication, which is managed conservatively initially, CLI requires urgent interventional planning to salvage the limb.

Anahtar Kavram

Patients with critical limb ischemia (rest pain, arterial ulcers, gangrene, ABI < 0.4) require urgent anatomic imaging of the arterial tree (e.g., CT angiography) to plan for surgical or endovascular revascularization.
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Cardiothoracic and Vascular Surgery

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