Intermittent Claudication and Differential Diagnosis

Review flashcards covering the definition, symptoms, clinical measurements, and differential diagnosis of intermittent claudication, including neurogenic and venous variations.

What is intermittent claudication?

Pain felt in the legs during walking due to arterial insufficiency, commonly associated with peripheral artery disease (PAD).

Describe the characteristic pain of intermittent claudication.

Patients experience tightness or cramp-like pain in the legs that occurs after walking a certain distance and resolves completely within a few minutes of rest.

How is 'claudication distance' defined?

The distance a patient can walk before experiencing pain in the legs due to intermittent claudication.

What is meant by 'total walking distance'?

The maximum distance a patient can walk before the pain becomes so severe that they must stop.

How does the location of pain relate to the level of arterial disease?

The calf is most commonly affected by femoropopliteal disease, while pain in the thigh or buttock indicates common femoral or aortoiliac obstruction.

What are the three main symptoms of Leriche’s syndrome in male patients?

Bilateral common iliac or internal iliac artery occlusion leading to buttock claudication and erectile dysfunction.

How does walking uphill affect claudication?

It typically reduces the claudication distance, meaning symptoms occur after a shorter distance compared to walking on flat ground.

What are the expected outcomes for patients with claudication using best medical therapy and supervised exercise?

$50\%$ of patients will improve, $30\%$ will remain stable, and $20\%$ will deteriorate further.

What is the primary purpose of performing interventions for claudication?

Interventions are performed purely for symptomatic relief, as only a small minority of patients progress to critical limb ischaemia.

What specific questions can help assess the impact of claudication on a patient's lifestyle?

Can you walk to the clinic from the bus stop or car park without stopping? Can you do your own shopping? What are you unable to do because of the pain?

Identify the site and onset of neurogenic claudication.

It typically involves ill-defined pain throughout the whole leg and often has an immediate onset upon walking or standing up.

How does venous claudication feel, and what is its typical laterality?

It is characterized by a 'bursting' pain in the leg and is nearly always unilateral.

How long does it take for arterial claudication pain to disappear after stopping walking?

The pain disappears completely within $1–2$ minutes.

How can neurogenic claudication pain be relieved?

Bending forwards and stopping walking can provide relief, and the patient may sit down for full relief.

What is the status of pulses in different types of claudication?

Pulses may be reduced or absent when walking stops (arterial), normal when bending forwards (neurogenic), and present but difficult to feel if oedema is present (venous).

How does the straight-leg raising test result vary among different claudication types?

The test is normal when walking stops (arterial) and when sitting down (venous), but may be limited when bending forwards (neurogenic).