Surgical cutting instrument

Details Surgical cutting instrument Surgical cutting instrument

1978-03-10

1981-01-27

Michell, Robert W.

Surgery

Truss

Pad

128276, A61B 1732

Patent

active

042469023

ABSTRACT:
A surgical cutting instrument, particularly useful for ophthalmic surgery, includes an elongate probe formed of an outer tubular member having an aperture in the distal end thereof and an inner cutting member having a peripheral cutting edge at the distal end thereof and an elongate body with an opening running therealong and carrying a piston disposed in a chamber of a hub through which the inner cutting member extends and which communicates with a source of suction, a drive unit for reciprocating the inner cutting member relative to the outer member, the opening along the inner cutting member forming an increased cross sectional flow area for cut substances being withdrawn by suction and the relative reciprocation of the inner and outer members coupled with increasing and decreasing pressure from the piston agitating the cut substances to prevent clogging of the probe. A finger-operated valve is formed of an elastic tubing stretched over the closed end of a rigid tube communicating with the chamber of the hub, the rigid tube having an opening in a side wall adjacent the closed end, which opening is normally sealed by the elastic tubing and can be opened by applying a force to the tubing at a position opposite the opening.

REFERENCES:
patent: 3561429 (1971-02-01), Jewett
patent: 3815604 (1974-06-01), O'Malley et al.
patent: 3882872 (1975-05-01), Douvas et al.
patent: 3977409 (1976-08-01), Brendling
patent: 4108182 (1978-08-01), Hartman et al.
patent: 4167943 (1979-09-01), Banko

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