Straining during defecation causes?

Appeared in: RUHS, Jaipur, M.Sc Nursing Entrance Exam-2018

Explanation

Straining during defecation, also known as the Valsalva maneuver, significantly increases intra-abdominal pressure.
This pressure is transmitted to the venous plexuses in the anal canal, causing them to become engorged with blood and swell.
Over time, this repeated pressure and engorgement weaken the supporting tissues, leading to the formation of hemorrhoids, which are dilated and prolapsed vascular cushions.
The process is a direct mechanical consequence of the force exerted during straining.

Option A: Polyps are abnormal growths of tissue from a mucous membrane. They are not caused by the mechanical act of straining.
Option B: Diarrhoea is characterized by frequent, loose, watery stools. It is the opposite of a condition that would necessitate straining.
Option D: Constipation is the cause of straining, not the effect. A person strains because they are constipated and have hard, difficult-to-pass stools.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Pathophysiology of Hemorrhoids as background academic context rather than a clinical decision trigger.
Nurses play a key role in patient education to prevent hemorrhoids by addressing the root cause of straining, which is often constipation.
Key nursing interventions include promoting a high-fiber diet, ensuring adequate fluid intake, and encouraging regular physical activity to promote bowel regularity.
What if? If a patient is prescribed opioid analgesics for post-operative pain, the risk of constipation and subsequent straining increases significantly. The nurse must proactively administer stool softeners and monitor bowel movements to prevent hemorrhoid development.

How to Approach the Question

First, identify the core relationship being tested in the question: 'Straining causes X'. This is a cause-and-effect question.
Analyze the term 'straining during defecation'. This implies a forceful pushing action, which increases pressure in the abdominal and pelvic areas.
Evaluate each option to determine its relationship with straining:
Does straining cause Polyps? (Unlikely, these are tissue growths).
Does straining cause Diarrhoea? (No, these are opposite concepts).
Does straining cause Hemorrhoids? (Plausible, as it involves increased pressure in the rectal area).

Concept Tested & Keywords

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E6 Nursing Brunner Adult Health 3SA Vol 1 Part 2 p. 156-158

E6 Nursing Fundamentals Potter Perry 12e Part 6 p. 25-27

E6 Medicine Harrison 22e Part 2 p. 488-490

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