Hamman's sign is a feature of:

Appeared in: DSSSB 6 September 2024

Explanation

Hamman's sign (or Hamman's crunch) is a crunching sound heard over the heart, synchronized with the heartbeat.
This sound is pathognomonic for pneumomediastinum, which is the presence of air in the mediastinal space.
Boerhaave's syndrome is a full-thickness (transmural) rupture of the esophagus, usually caused by forceful vomiting.
This rupture allows air from the esophagus to leak directly into the mediastinum, causing pneumomediastinum and thus, Hamman's sign.

Option A: Diverticulosis is a condition involving the formation of small pouches (diverticula) in the wall of the colon, not the esophagus. It is anatomically unrelated to the mediastinum.
Option B: Mallory-Weiss syndrome involves a partial-thickness tear of the mucosa at the gastroesophageal junction. While also caused by vomiting, it does not perforate the full esophageal wall, so air does not escape into the mediastinum.
Option C: Achalasia cardia is an esophageal motility disorder where the lower esophageal sphincter fails to relax properly. It causes dysphagia (difficulty swallowing) but does not involve a rupture or tear.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Clinical signs of esophageal perforation as background academic context rather than a clinical decision trigger.
Recognizing Hamman's sign is critical for nurses as it indicates a potential surgical emergency. It should prompt immediate notification of the physician.
Boerhaave's syndrome has a high mortality rate if not diagnosed and treated promptly. The nurse's role in rapid assessment and preparation for surgery is vital.
What if? If a patient has forceful vomiting followed by hematemesis but has no chest pain, subcutaneous emphysema, or Hamman's sign, the most likely diagnosis shifts to Mallory-Weiss syndrome, which is managed more conservatively.

How to Approach the Question

First, identify the key term in the question: 'Hamman's sign'.
Recall or deduce the definition of this clinical sign. It's a crunching sound over the chest, synchronous with the heartbeat.
Connect the sign to its underlying cause, which is air in the mediastinum (pneumomediastinum).
Analyze the given options to determine which condition could cause air to enter the mediastinum.
Boerhaave's syndrome is a full-thickness esophageal rupture, which provides a direct path for air to leak into the mediastinum.
Rule out the other options: Mallory-Weiss is a partial tear (no air leak), Achalasia is a motility issue (no rupture), and Diverticulosis affects the colon (wrong location).

Concept Tested & Keywords

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E6 Pathology- ROBBINS & COTRAN PATHOLOGIC BASIS OF DISEASE 10TH Ed p. 759-761

E6 Medicine Harrison 22e Part 2 p. 417-419

Practise the full DSSSB 6 September 2024

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