Distal Gastrointestinal Tract Pathology Quiz

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Which of the following best reflects the definition of constipation in clinical practice?

A Passage of hard stools or difficulty passing stools ✓
B Painful defecation due to anal fissures
C Complete absence of bowel sounds on examination
D Infrequent bowel movements fewer than three times per week only
E Abdominal bloating caused by excess intestinal gas

The answer is A: Passage of hard stools or difficulty passing stools

Explanation

Why A is correct

See Constipation. Option A is correct because constipation is a symptom, not a disease, and in clinical practice it describes unsatisfactory defaecation: infrequent stools, difficulty passing stools, hard stools or a sense of incomplete emptying. NICE describes it as a symptom-based disorder, and the Rome IV criteria used for diagnosis include bowel movements fewer than three times a week. Frequency is therefore only one part of the picture: some people pass a stool every day but strain to pass hard stools, whereas others pass stools less often without any difficulty. Chronic constipation usually means symptoms for at least three months, and it is more common in women, in older people and during pregnancy. Constipation can have a cause, such as a drug or a medical condition (secondary constipation), or it can be functional, with no known cause.

Nature: Constipation is a symptom, not a disease.
Definition: Unsatisfactory defaecation, with infrequent stools, difficulty passing stools, hard stools or a sense of incomplete emptying.
Frequency: Fewer than three bowel movements a week is only one part of the picture.

Why the other options are incorrect

B. Painful defecation due to anal fissures: Painful defecation from an anal fissure is a separate local problem, although a fissure can be caused by constipation and can make it worse. It would be correct for a question about the symptoms of an anal fissure.
C. Complete absence of bowel sounds on examination: Complete absence of bowel sounds is a sign of paralytic ileus or bowel obstruction. It is an examination finding, not a definition of constipation. It would be correct for a question about ileus.
D. Infrequent bowel movements fewer than three times per week only: Fewer than three bowel movements a week is one of the criteria, but the word 'only' makes the option too narrow. Constipation also includes hard stools, difficulty passing stools and a feeling of incomplete emptying. It would be right without the word 'only' if frequency were being asked about.
E. Abdominal bloating caused by excess intestinal gas: Abdominal bloating from excess gas can accompany constipation, but it is not part of its definition. It would be correct for a question about a symptom of functional bowel disorders.

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