CER Endoscope Design and Structure Questions and Answers 2

Question 1

Which component of a flexible endoscope houses the light guide bundles and image fiber bundle?

Accepted Answer

Umbilical cord/light guide tube

Answer

The umbilical cord connects the endoscope to the light source and houses the light guide bundles that transmit illumination.

Question 2

What is the function of the air/water channel in a flexible endoscope?

Accepted Answer

To insufflate air into the lumen and flush the lens with water for visualization

Answer

The air/water channel delivers air to distend the lumen for visualization and water to clean the lens at the distal tip.

Question 3

In a video endoscope, how is the image transmitted from the distal tip to the processor?

Accepted Answer

Via a charge-coupled device (CCD) or CMOS sensor and electrical cable

Answer

Video endoscopes use a CCD or CMOS chip at the distal tip to capture images and transmit them electronically to the video processor.

Question 4

What is the purpose of the elevator channel found in duodenoscopes?

Accepted Answer

To direct accessories emerging from the instrument channel toward the ampulla of Vater

Answer

The elevator (forceps elevator) in duodenoscopes deflects accessories to angle them toward the ampulla during ERCP procedures.

Question 5

Which material forms the flexible outer sheath (insertion tube covering) of most modern endoscopes?

Accepted Answer

Polyurethane or similar polymer blend

Answer

The insertion tube is covered with a polyurethane-based polymer that is flexible, durable, and compatible with high-level disinfectants.

CER - Certified Endoscope Reprocessor Practice Test