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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

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

    Answer: Elevator (deflecting mechanism)

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

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

    Answer: Polyurethane

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

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

    Answer: To insufflate the lumen and flush the objective lens

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

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

    Answer: Four

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

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

    Answer: Bending section

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

  6. Which endoscope component transmits the image from the distal tip to the eyepiece or external video processor?

    Answer: Image guide fiber bundle or CCD/CMOS chip

    Fiberoptic scopes use an image guide fiber bundle; video scopes use a CCD or CMOS chip at the distal tip to relay electronic image data.

  7. What is the primary function of O-rings located at endoscope channel port openings?

    Answer: To create a watertight seal preventing fluid ingress during immersion

    O-rings form a watertight seal at channel openings to prevent disinfectant or cleaning fluid from entering internal components during reprocessing.