American Endoscopy Services (AES) is a company contracted out by the University of Virginia to maintain and assist the surgical team on the endoscopic video system.

The AES staff is present during all endoscopic surgeries and are the ultimate troubleshooting resource.



Image Out of Focus
Image Too Dark
Spots on the Monitor Image
Poor Color Reproduction



Image out of Focus

First, adjust the camera's gray focus ring on the adapter.

It is best to focus the camera when it is closest to the operative site. This ensures that when it is moved back to obtain a wide picture, it will remain in focus.

If the focus dial does not work, it may be because the coupling of the scope and the adapter is not tight.

Use the rabbit ears to detach the camera from the adapter and aim the camera at a wall. Use the focus dial. If there is still not a clear picture, it may be the scope or light cord.


Image Too Dark

· Turn up the intensity of the light source
· Confirm light source connections
· Check lamp and bulb. May be very hot.
· Adjust contrast/brightness on the monitor



Spots on the Monitor

If dust particles appear on the monitor image, rotate the scope. If the dust particles rotate with the image, the duct is in the scope. Clean the scope.

If the dust particles do not rotate, the dust is behind the scope. Clean the optical surfaces of the camera head and adaptor with alcohol-dipped cotton swab


Poor Color Reproduction

The most common cause of color distortion is failure to correctly white balance the video system. Repeat the white balance procedure with correct ambient illumination, and pointing the camera at a pure white, not off -white, object

Ask AES to readjust the monitor with reference to the color bar pattern.

Occasionally, blood from the operative site will dry in the distal tip of the scope giving the entire image a pinkish hue. Use a wet 4x4 or sponge to wipe the dried blood off the tip of the scope.



Fogging is a slow loss of definition and clarity in the monitor image.

It is also seen as a buildup of a hazy white halo around the perimeter of the circular image.

It is generally caused when moisture on the scope or coupler lenses is warmed from room temperature to body temperature.

To avoid fogging, make sure that the entire area is very dry before assembling the camera, the coupler and the scope.

Use an anti-fogging agent on the lens or use a sponge soaked in hot saline.



Sometimes the scope lens gets dirty.

One method commonly used it to quickly and gently stick the lens in the liver bed.

If that does not work, then the surgeon will ask the camera operator to remove the camera and get the scrub nurse's assistance in cleaning the lens.

The cleaning agent used is called FRED.