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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

  1. Which component of a flexible endoscope houses the imaging sensor or fiber optic bundle at the distal tip?

    Answer: Distal end

    The distal end contains the imaging sensor (CCD/CMOS) or fiber optic bundle, along with the light guide lens and instrument channel opening.

  2. What is the primary purpose of the biopsy/instrument channel in a flexible endoscope?

    Answer: To allow passage of accessories such as forceps and snares

    The instrument channel (also called the working or biopsy channel) allows clinicians to pass accessories like biopsy forceps, snares, and brushes to the operative site.

  3. The angulation or bending section of a flexible endoscope is located:

    Answer: At the distal end just proximal to the tip

    The bending section is located just behind the distal tip and allows the endoscope tip to deflect in response to angulation knob movements.

  4. Which material is commonly used to form the outer sheath of the insertion tube to provide flexibility and durability?

    Answer: Polyurethane or rubber over a metal mesh braid

    The insertion tube outer sheath is typically made of polyurethane or rubber material supported by a braided metal mesh, providing both flexibility and structural integrity.

  5. In a video endoscope, what converts optical images into electronic signals at the distal tip?

    Answer: Charge-coupled device (CCD) or CMOS sensor

    Video endoscopes use a CCD or CMOS chip at the distal tip to convert optical images directly into electronic signals transmitted to the video processor.

  6. The water/air channel in a flexible endoscope is used to:

    Answer: Inflate the colon for colonoscopy and wash the lens

    The water/air channel delivers air to insufflate body cavities and water to flush the objective lens, maintaining a clear view during the procedure.

  7. Which endoscope component is most susceptible to damage from improper coiling or tight bends during transport and storage?

    Answer: Insertion tube and bending section

    The insertion tube and delicate bending section are most vulnerable to kinking and internal wire breakage when coiled too tightly or bent sharply.