Endoscopy Flashcards
(10 cards)
What is an endoscope used for?
To investigate areas inside the human body that would otherwise be inaccessible
An endoscope allows for visual examination through small incisions or natural openings.
What technology allows light to be sent and received from remote areas in an endoscope?
Bundles of optical fibres
These fibres carry light to the area being investigated and transmit the image back.
What additional elements can be included in an endoscope besides light?
Water, air, and control wires for surgical instruments
This enhances the functionality of the endoscope during procedures.
What is the function of the objective lens in an endoscope?
To focus an image onto the cut ends of the optical fibres
This lens is located at the distal end of the endoscope.
How does each fibre in the optical bundle relate to the image produced?
Each fibre carries light for one pixel in the image
This pixelation creates the overall image viewed by the operator.
What is the purpose of the eyepiece lens in an endoscope?
To refocus light exiting from the fibre bundle to be viewed as an image
This can be viewed directly by the eye or through a camera.
What characterizes the images obtained from an endoscope?
They are analogue images
The brightness and color of each pixel vary with time in direct proportion to the light collected.
What is an arthroscope?
A small fibre optic camera used for keyhole surgery on joints
It allows for minimally invasive procedures, often in the knee joint.
Fill in the blank: The brightness and color of each pixel in an analogue image vary with time in direct proportion to the _______.
light collected by the objective lens
True or False: An endoscope can only be used for visual examination.
False
An endoscope can also deliver water, air, and facilitate surgery.
