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
Which endoscope design feature makes ureteroscopes particularly challenging to reprocess compared to upper GI endoscopes?
Answer: Their extremely small diameter creates very narrow lumens that are difficult to access for cleaning
Ureteroscopes have very small outer diameters and correspondingly narrow instrument channels, making it difficult to pass brushes and achieve adequate mechanical cleaning.
The 'O-ring' seals found at endoscope valve ports serve to:
Answer: Prevent fluid from entering the endoscope body through valve openings during reprocessing
O-ring seals create a watertight barrier at valve ports, preventing reprocessing fluids from entering the internal endoscope structure during cleaning and disinfection.
What does a 'four-way angulation' tip deflection capability mean for an endoscope?
Answer: The tip can be deflected in up, down, left, and right directions
Four-way angulation means the distal tip can be deflected in all four directions (up/down and left/right), providing full maneuverability within body cavities.
During leak testing, a positive result (bubbles or pressure loss) most likely indicates:
Answer: A breach in the outer sheath, seals, or internal components allowing air escape
A positive leak test result means air is escaping through a breach in the endoscope's integrity, which could allow fluid ingress and damage during reprocessing.
The image bundle in a fiberoptic endoscope differs from the light guide bundle in that the image bundle:
Answer: Transmits the visual image from the distal lens back to the eyepiece
The image bundle carries the visual image captured at the distal objective lens back to the eyepiece or camera head at the proximal end of the scope.
Which statement best describes the relationship between endoscope channel diameter and brushing requirements during manual cleaning?
Answer: The brush diameter must match or slightly exceed the channel diameter to achieve adequate mechanical scrubbing
Using a brush sized to match or slightly exceed the channel diameter ensures the bristles contact the channel walls and effectively remove debris and biofilm.
The proximal end of an endoscope typically includes which of the following structural features?
Answer: The control body with angulation knobs, valve ports, and the eyepiece or video connector
The proximal end (control body) houses the up/down and left/right angulation knobs, air/water and suction valve ports, instrument channel inlet, and the eyepiece or camera connector.