Endoscope Design and Structure Questions and Answers Flashcards
7 cards from real CER practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Endoscope Design and Structure Questions and Answers flashcards as text
Which internal structural layer of the endoscope insertion tube is primarily responsible for transmitting rotational torque to the distal tip?
Answer: Spiral metal mesh/coil layer
The spiral metal mesh or coil wound within the insertion tube wall transmits torsional force so the endoscopist can steer the scope by rotating the control body.
In a video endoscope, where is the image sensor (CCD or CMOS chip) located?
Answer: At the distal tip of the insertion tube
The image sensor is embedded in the distal tip to capture high-resolution images directly at the procedure site and transmit signals proximally.
What is the primary purpose of the water-resistant (leak-test) cap applied to the light guide connector before reprocessing?
Answer: To seal the connector so the scope can be fully submerged during reprocessing
The water-resistant cap seals the light guide connector, allowing complete immersion of the scope body in detergent and high-level disinfectant solutions.
Which endoscope type uses a side-viewing (lateral-viewing) optical design rather than a forward-viewing design?
Answer: Duodenoscope
Duodenoscopes are side-viewing to allow the endoscopist to visualize and cannulate the ampulla of Vater during ERCP procedures.
What dual function does the suction/biopsy channel valve serve during an endoscopic procedure?
Answer: Activates suction and permits passage of accessories through the working channel
Depressing the suction/biopsy valve activates aspiration, and the same port allows accessories such as forceps and snares to be introduced.
The universal cord of a flexible endoscope physically connects which two main components?
Answer: Control body to the external light source and video processor
The universal cord (umbilical) carries light fibers, electrical wires, and fluid lines from the control body to the tower equipment (light source and processor).
What material are the articulating rings within an endoscope's bending section most commonly made of?
Answer: Stainless steel
Stainless steel rings are used in the bending section because of their strength, corrosion resistance, and ability to tolerate repeated flexion cycles.