CER Endoscope Design and Structure 2

Question 1

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

Accepted Answer

Distal end

Answer

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

Question 2

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

Accepted Answer

To allow passage of accessories such as forceps and snares

Answer

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.

Question 3

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

Accepted Answer

At the distal end just proximal to the tip

Answer

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

Question 4

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

Accepted Answer

Polyurethane or rubber over a metal mesh braid

Answer

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.

Question 5

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

Accepted Answer

Charge-coupled device (CCD) or CMOS sensor

Answer

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.

CER - Certified Endoscope Reprocessor Practice Test

CER - Certified Endoscope Reprocessor Practice Test

CER Endoscope Design and Structure 2