By which instrument is a Rectal examination performed?

Appeared in: Bihar CHO - 2021

Explanation

A proctoscope is the specific instrument designed for the visual examination of the anal canal and the lower rectum, a procedure known as proctoscopy.
The image provided clearly shows a proctoscope, which is a short, rigid, hollow tube with an accompanying obturator for smooth insertion.
It is used to diagnose and evaluate local conditions such as hemorrhoids, fissures, and rectal bleeding.
While other scopes examine parts of the lower GI tract, the proctoscope is the most precise instrument for a focused rectal examination as implied by the question and image.

Option B: A vaginascope, or vaginal speculum, is used for gynecological examinations to visualize the vagina and cervix.
Option C: A rectoscope (or rigid sigmoidoscope) is longer than a proctoscope and is used to examine the entire rectum and the distal sigmoid colon.
Option D: A colonoscope is a very long, flexible instrument used to visualize the entire large intestine (colon) from the rectum to the cecum.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Identification of instruments for lower gastrointestinal examination as background academic context rather than a clinical decision trigger.
Correct instrument selection is crucial for accurate diagnosis and patient safety. Using the wrong scope can lead to missed pathology or patient injury.
Patient education and psychological support are key nursing responsibilities. Explaining the procedure, sensations, and purpose can significantly reduce patient anxiety and improve cooperation.
Nurses must be vigilant for complications like vasovagal reactions or (rarely) perforation during and after the procedure, monitoring vital signs and patient comfort.

How to Approach the Question

First, analyze the question to identify the core task: linking a procedure ('Rectal examination') with the correct instrument.
Next, carefully examine the provided image. Identify the instrument shown; in this case, it's a short, rigid tube characteristic of a proctoscope.
Evaluate each option based on your knowledge and the visual clue. A proctoscope is used for the rectum.
Eliminate the incorrect options. A vaginascope is for the vagina. A colonoscope is for the entire colon. A rectoscope is a close distractor but a proctoscope is more specific for the lower rectum and matches the image perfectly.
Select the option that best matches both the procedure described and the instrument depicted in the image.

Concept Tested & Keywords

Concept Tested: Identification of instruments for lower gastrointestinal examination.
Stem keywords: Rectal examination, instrument
Lead-in keywords: By which

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E6 Nursing Brunner Adult Health 3SA Vol 1 Part 2 p. 84-86

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