The reliability of cecal landmarks during colonoscopy

Area of Science:

• Gastroenterology
• Endoscopic Procedures
• Anatomical Studies

Background:

• Confirming cecal intubation in colonoscopy can be difficult and time-consuming.
• Anatomical landmarks offer potential visual cues, but their reliability is uncertain.

Purpose of the Study:

• To evaluate the reliability of three specific cecal landmarks, individually and in combination, for confirming colonoscopic intubation.
• To determine the most dependable visual indicators for successful cecal visualization during colonoscopy.

Main Methods:

• Prospective evaluation of 601 consecutive colonoscopies confirmed by fluoroscopy.
• Assessment of the presence and combination of three cecal landmarks: ileocecal sphincter, appendiceal orifice, and transillumination.
• Analysis of landmark identification rates in relation to overall cecal intubation success.

Main Results:

• At least two cecal landmarks were identified in 96% of successful colonoscopies.
• The ileocecal sphincter was the most consistently identified landmark (98% overall).
• The appendiceal orifice (87%) and transillumination (74%) were also frequently observed, particularly with the ileocecal sphincter.

Conclusions:

• The ileocecal sphincter is the most reliable landmark for confirming cecal intubation.
• Combining the ileocecal sphincter with other landmarks like the appendiceal orifice or transillumination enhances diagnostic certainty.
• Utilizing multiple landmarks, especially the ileocecal sphincter, improves the accuracy and efficiency of colonoscopic cecal confirmation.