04875468 is referenced by 77 patents and cites 21 patents.

A biopsy channel for a borescope or endoscope is formed of a thin-wall elastomeric tubular sleeve or sheath that is interference fitted over an expanded polytetrafluoroethylene (Teflon) liner. An end fitting can be formed of a metal or plastic tube, preferably with an internal chamfer. This can be secured by epoxy in either end of the channel, after suitably priming the elastomeric sleeve or sheath. This channel has high dimensional stability and can withstand bending to tight radii without kinking.

Title
Elastomer-ePTFE biopsy channel
Application Number
7/289324
Publication Number
4875468
Application Date
December 23, 1988
Publication Date
October 24, 1989
Inventor
Robert L Vivenzio
Auburn
NY, US
Allan I Krauter
Syracuse
NY, US
Agent
Wall and Roehrig
Assignee
Welch Allyn
NY, US
IPC
A61B 1/00
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