Endoscopic instrument

Details Endoscopic instrument Endoscopic instrument

1996-05-28

1997-11-18

Flanagan, Beverly M.

Surgery

Endoscope

Having auxiliary channel

600157, 600135, A61B 112

Patent

active

056882220

ABSTRACT:
An endoscopic instrument with an inner sheath carrying instrument optics and an outer sheath enclosing the inner sheath so as to form a gap between the sheaths, the outer sheath having apertures radially through its distal end zone to provide fluid communication between the gap and the surroundings of the outer sheath. The inner sheath acts as a supply duct and the gap between the inner and outer sheaths acts as an evacuation duct for the rinsing fluid. A hole connects the interior of the inner sheath to the gap at the distal end of the inner sheath, the clear cross-section of the hole being substantially less than the sum of the cross-sections of the apertures at the distal zone of the outer sheath.

REFERENCES:
patent: 3939839 (1976-02-01), Curtiss
patent: 4770163 (1988-09-01), Ono et al.
patent: 5509892 (1996-04-01), Bonnet

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