Clubbing of fingers is sign of-

Appeared in: RUHS, Jaipur, PB B.Sc Nursing Entrance-2022

Explanation

Finger clubbing is the bulbous enlargement of the distal segments of the fingers and toes due to the proliferation of connective tissue.
It is strongly associated with conditions that cause chronic hypoxemia (low blood oxygen levels) over a prolonged period.
Chronic lung diseases such as lung cancer, bronchiectasis, cystic fibrosis, and interstitial lung disease are classic causes of chronic hypoxemia, leading to the development of clubbing.

Option A: This is an acute condition causing inflammation and dehydration. It does not cause the long-term hypoxia required for clubbing to develop.
Option B: Shock is an acute state of circulatory collapse and systemic hypoperfusion. Clubbing is a chronic sign that develops over months to years, not from an acute event.
Option C: While a chronic condition, renal disease is primarily associated with anemia, uremia, and electrolyte disturbances. It is not a recognized or common cause of finger clubbing.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Clinical signs of chronic disease as background academic context rather than a clinical decision trigger.
The presence of finger clubbing is a significant clinical finding that should always prompt a thorough investigation for serious underlying systemic diseases, particularly lung cancer, chronic lung infections, and cyanotic heart disease.
Nurses are often the first to notice subtle physical changes like early clubbing during routine patient assessments and play a key role in reporting these findings.
What if? If a patient with new-onset clubbing is also a long-term smoker with a persistent cough, the nurse's priority is to ensure prompt referral for investigation of bronchogenic carcinoma (lung cancer), as this is a classic presentation.

How to Approach the Question

First, identify the key clinical sign in the question: 'clubbing of fingers'.
Recall the pathophysiology of clubbing, which is linked to chronic conditions, particularly those causing long-term hypoxia.
Evaluate each option based on this understanding.
Eliminate acute conditions like 'Acute gastroenteritis' and 'Shock' because clubbing is a chronic sign that develops over an extended period.
Compare the remaining chronic conditions. 'Chronic lung disease' is a classic and common cause of hypoxia-induced clubbing.
Recognize that 'Chronic renal disease' is not typically associated with clubbing, making 'Chronic lung disease' the best answer.

Concept Tested & Keywords

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E6 Medicine Harrison 22e Part 1 p. 320-322

E6 Medicine Harrison 22e Part 2 pp. 874-876, 875-877

Practise the full RUHS, Jaipur, PB B.Sc Nursing Entrance-2022

Attempt every question from this paper in a timed mock, then review the full solution for each one.