Endoscope Design and Structure 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 flashcards as text
What distinguishes a side-viewing (oblique) endoscope from a forward-viewing endoscope?
Answer: The lens is angled to the side of the distal tip rather than facing forward
Side-viewing endoscopes, such as duodenoscopes, have the objective lens oriented laterally on the distal tip, allowing visualization of structures like the ampulla of Vater.
The elevator (raising bridge) found on duodenoscopes is unique because it:
Answer: Directs accessories exiting the instrument channel toward the target tissue
The elevator mechanism at the distal tip of a duodenoscope deflects accessories exiting the instrument channel, directing them toward the papilla during ERCP.
Which of the following best describes the light guide bundle in a fiberoptic endoscope?
Answer: Thousands of thin glass or plastic fibers conducting light from source to distal tip
The light guide bundle consists of thousands of fine glass or plastic fibers that transmit illumination from the external light source to the distal tip.
What is the function of the universal cord on a flexible endoscope?
Answer: It connects the control body to the light source, video processor, and other external equipment
The universal cord connects the endoscope body to external equipment including the light source, video processor, air/water pump, and suction unit.
Why is it critical for reprocessing personnel to know the number and configuration of channels in an endoscope?
Answer: To ensure all lumens are flushed and cleaned during reprocessing
Each channel must be individually flushed, brushed, and disinfected; missing a channel can result in retained bioburden and patient infection risk.
The outer jacket of the insertion tube must remain intact during reprocessing primarily to:
Answer: Prevent fluid ingress into the internal components and electrical systems
Breaches in the outer jacket allow reprocessing fluids to enter the internal structure, leading to corrosion, electrical damage, and potential patient harm.
Which endoscope component directly contacts the mucosal surface and must withstand repeated high-level disinfection or sterilization?
Answer: Distal end cap and insertion tube outer sheath
The distal end cap and insertion tube sheath contact patient mucosa directly and must be reprocessed to at least the high-level disinfection standard after every use.