The position used in sigmoidoscopy is:

Appeared in: AIIMS Delhi NO-2016

Explanation

The knee-chest position is specifically indicated for the examination of the rectum and colon.
In this position, the patient kneels and rests their chest on the table, which causes the sigmoid colon to straighten out.
This alignment allows gravity to pull the abdominal organs slightly forward, away from the pelvis, providing the examiner with a clearer view and easier passage for the sigmoidoscope.
An alternative and often more comfortable position for the patient is the left lateral or Sims' position, which also facilitates access to the sigmoid colon.

Option B: The supine position (lying on the back) does not provide access to the anus and rectum, making it unsuitable for a sigmoidoscopy.
Option C: While the lithotomy position exposes the perineal area, it is not the preferred position for a sigmoidoscopy as it doesn't straighten the sigmoid colon as effectively as the knee-chest or Sims' position.
Option D: Fowler's position is a semi-sitting position that is completely inappropriate for a rectal examination.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Patient positioning for endoscopic procedures as background academic context rather than a clinical decision trigger.
Proper positioning is crucial for the success and safety of a sigmoidoscopy. Incorrect positioning can cause patient discomfort, increase the risk of perforation, and lead to an incomplete examination.
Nurses play a key role in educating the patient, assisting them into the correct position, and ensuring their privacy and comfort throughout the procedure.
What if? If a patient is elderly or has severe arthritis and cannot assume the knee-chest position, the nurse should anticipate this and prepare to assist them into the left lateral (Sims') position, which is a common and effective alternative.

How to Approach the Question

First, identify the core of the question, which is asking for the specific patient position required for a sigmoidoscopy.
This is a factual recall question. Access your knowledge about common medical procedures and the associated patient positioning.
Evaluate each option. Think about the anatomy involved. A sigmoidoscopy examines the lower colon, so the position must provide clear access to the rectum.
Consider the purpose of each position: Knee-chest and Sims' for rectal access, Supine for anterior body access, Lithotomy for perineal/GU access, and Fowler's for respiratory ease.
Select the option that aligns the body correctly to straighten the sigmoid colon and facilitate the procedure.

Concept Tested & Keywords

Q7PZ_ouD-Dzjj9RTK-6FWS

E6 Nursing Fundamentals Taylor pp. 210-212, 382-384

Practise the full AIIMS Delhi NO-2016

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