The length of the flexible sigmoidoscope is:
**Core Concept**
The flexible sigmoidoscope is a medical instrument used for visual examination of the sigmoid colon and rectum. Its design and length are crucial for effective and safe use during procedures.
**Why the Correct Answer is Right**
The flexible sigmoidoscope typically has a length of 60 cm, which allows for examination of the sigmoid colon and rectum. The length enables the operator to easily maneuver the scope and visualize the mucosa without causing discomfort or complications to the patient. The 60 cm length is also sufficient to allow for proper insertion and withdrawal of the scope during procedures.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because the length of the flexible sigmoidoscope is not typically 40 cm, which would be too short for effective examination of the sigmoid colon and rectum.
* **Option B:** This option is incorrect because the length of the flexible sigmoidoscope is not typically 80 cm, which would be too long for examination of the sigmoid colon and rectum, and may cause discomfort or complications to the patient.
* **Option C:** This option is incorrect because the length of the flexible sigmoidoscope is not typically 100 cm, which would be excessively long for examination of the sigmoid colon and rectum.
**Clinical Pearl / High-Yield Fact**
It's essential to note that the length of the flexible sigmoidoscope may vary slightly depending on the manufacturer and model, but 60 cm is the standard length used in most medical settings.
**Correct Answer: C. 60 cm**