55 years old male, known smoker complains of pain in calf on walking. pain still persists on continuing walk, but can walk with effort. which grade of claudication does this patient fall under
**Core Concept**
The patient's symptoms are indicative of intermittent claudication, a manifestation of peripheral arterial disease (PAD). Intermittent claudication is a condition characterized by muscle pain (ache, cramp, numbness, or sense of fatigue) in the lower extremities, typically occurring with exercise and relieved by rest.
**Why the Correct Answer is Right**
The patient's ability to walk with effort but not without pain suggests that he has grade 2 claudication, as per the Fontaine classification. This classification system categorizes claudication into four grades based on the severity of symptoms:
- Grade 1: Asymptomatic, but with abnormal ankle-brachial index (ABI)
- Grade 2: Intermittent claudication, pain on walking, but able to walk with effort
- Grade 3: Severe claudication, pain at rest, but able to walk with assistance
- Grade 4: Ischemic rest pain, pain at rest, and often accompanied by tissue loss
The patient's symptoms align with grade 2 claudication, indicating that he has moderate symptoms of PAD that are exacerbated by exercise.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because grade 1 claudication is asymptomatic, and the patient is experiencing pain on walking.
**Option B:** This option is incorrect because grade 3 claudication is characterized by pain at rest, which is not present in this patient.
**Option D:** This option is incorrect because grade 4 claudication is characterized by ischemic rest pain, often accompanied by tissue loss, which is not present in this patient.
**Clinical Pearl / High-Yield Fact**
It's essential to remember that claudication symptoms can be relieved by rest, which is a key distinguishing feature of intermittent claudication.
**Correct Answer: C. Grade 2 claudication.**