Advanced Health Assessment Practice Exam

What is the angle associated with late clubbing of the nails?

1. Less than 160 degrees

2. 160 degrees

3. 180 degrees

4. Over 200 degrees

The correct answer is: 180 degrees

Late clubbing of the nails is typically characterized by a significant increase in the angle between the nail bed and the nail. In this context, an angle of 180 degrees indicates that the fingernail has a more pronounced curvature and distention, which is a hallmark of clubbing. This anatomical change occurs due to various underlying conditions, often related to chronic hypoxia or vascular changes associated with pulmonary or cardiovascular diseases. When assessing clubbing, a normal angle is usually around 160 degrees or less. Angles greater than this, particularly reaching 180 degrees, signal the transition from normal nails to the definitive signs of clubbing, which may require further investigation into possible underlying health issues. Understanding this criterion for clubbing helps healthcare providers to recognize the signs of systemic disease early and guides further diagnostic steps.