Endoscopic Equipment & Instrumentation Flashcards

What type of light source is most commonly used in modern video endoscopy systems?

Answer: Xenon arc lamp

Xenon arc lamps provide the high-intensity, white-spectrum light required for modern video endoscopy imaging.

Which component of a video endoscope converts optical images into electronic signals?

Answer: Charge-coupled device (CCD)

The CCD (or CMOS sensor) at the distal tip of a video endoscope converts light into electronic signals for display.

What is the purpose of the air/water valve on an endoscope?

Answer: Delivers air to distend the lumen and water to clean the lens

The air/water valve allows the endoscopist to insufflate air to distend the organ lumen and flush water to clear debris from the lens.

Which term describes the maximum angle through which an endoscope tip can be deflected?

Answer: Angulation range

Angulation range specifies the maximum degrees of tip deflection (up/down and left/right) achievable with the angulation controls.

A dual-channel endoscope is primarily advantageous because it allows:

Answer: Simultaneous use of two accessories

Dual-channel endoscopes have two instrument channels, enabling simultaneous passage of two accessories for complex therapeutic procedures.

What does the term 'working length' refer to in endoscope specifications?

Answer: The insertable shaft length from the control body to the distal tip

Working length is the length of the insertable portion of the endoscope that can be introduced into the patient.

Which endoscope design feature allows visualization of structures at the side rather than the front of the scope?

Answer: Side-viewing (lateral-viewing) configuration

Side-viewing endoscopes (such as the duodenoscope) have the objective lens oriented laterally, enabling visualization of the ampulla of Vater.