CER Endoscope Design and Structure Questions and Answers 3

Question 1

Which component unique to duodenoscopes is designed to deflect accessories exiting the working channel toward the target tissue?

Accepted Answer

Elevator (deflecting mechanism)

Answer

The elevator (deflecting mechanism) in duodenoscopes redirects accessories such as catheters toward the ampulla of Vater during ERCP.

Question 2

Which material is most commonly used for the outer sheath of a flexible endoscope's insertion tube?

Accepted Answer

Polyurethane

Answer

Polyurethane is the standard outer sheath material because it offers flexibility, durability, and resistance to repeated chemical reprocessing.

Question 3

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

Accepted Answer

To insufflate the lumen and flush the objective lens

Answer

The air/water channel delivers air for lumen distension and water to clear debris from the objective lens, maintaining visualization.

Question 4

How many angulation wires are found in a flexible endoscope capable of four-way (up/down/left/right) deflection?

Accepted Answer

Four

Answer

Four angulation wires are required—one for each direction of deflection—controlled by two pairs via the up/down and left/right knobs.

Question 5

What is the term for the distal-most articulating segment of a flexible endoscope that responds to control knob movement?

Accepted Answer

Bending section

Answer

The bending section is the short, actively articulating segment at the distal end, controlled by angulation knobs on the control body.

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