Exertional leg pain in a patient with vascular risk factors deserves a vascular assessment, even when peripheral pulses are palpable.

👨‍⚕️ Patient: 52-year-old male
History: Diabetes, hypertension, ischemic heart disease, prior stroke
Complaint: Left leg pain and numbness for 3 days, worse with walking.

🧐 Exam Findings:

• No swelling, redness, or discoloration
• Full range of motion
• Palpable peripheral pulses
• Neuro exam: numbness but no motor weakness

🧠 Differential Diagnosis:

• Lumbar radiculopathy
• Peripheral arterial disease (PAD)
• DVT
• Musculoskeletal strain
• Nerve entrapment
• Stroke (given history)

What POCUS added:
Bedside ultrasound reportedly showed no DVT in the veins examined and abnormal arterial flow, described as monophasic and biphasic. The scan coverage and images are not supplied. A negative limited venous scan must be interpreted within a pretest-probability-based DVT pathway; obtain formal or serial ultrasound when that pathway requires it (ASH guidance).
Arterial waveforms depend on the vessel, local resistance and acquisition quality. Downstream flow may become damped when upstream stenosis reduces pressure. “Biphasic” alone does not diagnose obstruction, and bedside waveforms alone cannot establish the lesion’s severity or limb viability (SVM/SVU consensus).

🔬 Next steps:

• Formal arterial Doppler confirmed severe stenosis.
• CT angiogram confirmed severe lower-limb arterial disease.

The time-sensitive decision: Three days of pain with numbness raises concern for acute or acute-on-chronic ischemia; the record does not establish its category. Reassess sensation, motor function, temperature and arterial/venous Doppler signals, and obtain urgent vascular assessment. New weakness or progressive sensory loss demands immediate escalation. Imaging should not delay treatment of a threatened limb. If acute limb ischemia is diagnosed, give systemic unfractionated heparin unless contraindicated, with urgent revascularization assessment; do not prescribe anticoagulation merely for an abnormal waveform. Repeat neurovascular examinations while arranging care. Chronic limb-threatening ischemia is a separate syndrome involving ischemic rest pain, nonhealing wounds or gangrene lasting more than two weeks, not simply severe stenosis on imaging (2024 ACC/AHA multisociety guidance).

💡 Key Takeaway:

Palpable pulses and an unremarkable skin appearance do not settle the cause of exertional pain. Integrate symptoms, examination and vascular testing.

Reported outcome: The account states that early detection led to urgent vascular intervention. It does not describe the procedure, medications, post-treatment examination or follow-up.