CER Endoscope Design and Structure 4

Question 1

A 'double-channel' endoscope differs from a standard endoscope in that it has:

Accepted Answer

Two instrument channels running through the insertion tube

Answer

Double-channel endoscopes contain two parallel instrument channels, allowing simultaneous passage of two accessories or improved suction capability.

Question 2

The 'up/down' and 'left/right' angulation knobs on the control body operate by:

Accepted Answer

Tension applied to stainless steel angulation wires attached to the bending section

Answer

Rotating the angulation knobs adjusts tension on stainless steel wires that run through the insertion tube and attach to the bending section, causing tip deflection.

Question 3

What is the significance of a 'waterproof' vs. 'water-resistant' rating on endoscope components?

Accepted Answer

Waterproof components can be fully immersed during reprocessing; water-resistant ones cannot

Answer

Only components rated as waterproof or fully immersible may be submerged in liquid during reprocessing; water-resistant components may only tolerate surface moisture.

Question 4

In flexible endoscope construction, what is the role of the 'mesh braid' layer within the insertion tube?

Accepted Answer

It provides torque transmission and prevents kinking of the tube

Answer

The stainless steel mesh braid layer within the insertion tube transmits rotational torque from the control body to the distal end and prevents the tube from kinking.

Question 5

Which structure on the distal end of a colonoscope provides insufflation of the colon during the procedure?

Accepted Answer

Air/water nozzle directed at the objective lens and cavity

Answer

The air/water nozzle at the distal tip directs air into the colon for insufflation and water onto the objective lens for cleaning, both critical to visualization.

CER - Certified Endoscope Reprocessor Practice Test

CER - Certified Endoscope Reprocessor Practice Test

CER Endoscope Design and Structure 4