A - Human Necessities – 61 – B
Patent
A - Human Necessities
61
B
128/113
A61B 17/14 (2006.01)
Patent
CA 1145636
Abstract of the Disclosure A surgical instrument useful in closed surgery, as of the knee, in the form of a vacuum shaver comprising an external stationary tube having a side-facing, axially extending shaving port and an internal rotary blade. Radial bearing portions at both proximal and distal ends radially support the blade in shearing relation to the external tube. A vacuum conduit draws fluid and articles to be shaved into the shaving port, and draws discrete shavings through the instrument, while the blade is driven at shearing speeds. In a form particularly suited for closed intra-articular surgery by arthroscopy, the ratio of the axial length of the shaving port to the internal diameter of the passage through which shavings are withdrawn is in the range of 1.5 to 2.0, the shaving blade is of helical form of substantially less than one full turn over the length of the shaving port and the drive motor rotates the blade at speeds in the range of 100 to 200 rpm. The blade is defined by a cut-out in an inter- nal tube, with portion of the full tube defining bearings at the ends of the blade. The external tube, at the distal and proxi- mal sides of the shaving port defines scraping edges, with the vacuum shaving port receiving the resultant scrapings. A distal sideways in the direction of the shaving port upon axial forward motion; serrations on the edge of the shaving port resist axial movement of tissue along the port during shaving action; and both axial sides of the shaving port define cutting edges with the drive motor adapted to drive the rotary blade in either direction at the selection of the surgeon.
347340
Bonnell Leonard J.
Johnson Lanny L.
Mchugh Edward H.
Sjostrom Douglas D.
Smart & Biggar
Smith & Nephew Inc.
LandOfFree
Surgical instrument suitable for closed surgery such as of... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Surgical instrument suitable for closed surgery such as of..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Surgical instrument suitable for closed surgery such as of... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1133134