The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 21, 1998
Filed:
Nov. 13, 1996
Donald L Alden, Sunnyvale, CA (US);
Jeffrey J Christian, San Jose, CA (US);
Femrx, Inc., Sunnyvale, CA (US);
Abstract
The invention provides tubular surgical cutters having conical or tapering cutting chambers along substantially the entire length of their cutting apertures. Tissues which are drawn into such a conical chamber and severed from the adjacent tissue are quite easily drawn proximally for aspiration, substantially reducing the likelihood that they will clog the cutter mechanism. In some embodiments, an inner cutting tube having an orifice which is smaller than that of the outer cutting tube limits the size of tissue fragments entrained within the cutting chamber, further reducing the possibility that those fragments will clog the aspiration lumen and interrupt the tissue removal process.