John M Mathis

US Patent:

60483431, Apr 11, 2000

Filed:

Jun 2, 1999

Appl. No.:

9/324106

Inventors:

John M. Mathis - Roanoke VA
Stephen M. Belkoff - Kingsville MD
Charles J. Phillips - Annapolis MD
Marshall D. Welch - Lafayette CO
Steven M. Kmiec - Coventry CT

International Classification:

A61B 1758

US Classification:

606 72

Abstract:

A bone screw system (100) is provided that includes a cannulated bone screw (110) and an adapter (140) designed to be releasably coupled to the screw (110). The screw (110) has a head (112) with an opening (126) formed therein. A shank portion (114) of screw (110) extends from the head (112) and has a closed end bore (124) formed therein in open communication with the opening (126). The screw (110) has a threaded portion (116) in which a plurality of apertures (122) are formed in a root portion (120) of the thread. The adapter (140) has a distal end (150) adapted for releasable coupling with the head (112) and has a passage (162) extending longitudinally therethrough for open communication with the bore (124) of the screw (110). The adapter (140) further includes a grip portion (154) formed by a plurality of spaced annular ridges (156). The proximal end of adapter (140) has a fitting (142) formed thereon for coupling to a device for dispensing a purchase enhancing composition, through the adapter (140) and bore (124) to the apertures (122).

US Patent:

62210297, Apr 24, 2001

Filed:

May 13, 1999

Appl. No.:

9/311692

Inventors:

John M. Mathis - Roanoke VA
Stephen M. Belkoff - Kingsville MD
Charles J. Phillips - Annapolis MD
Marshall D. Welch - Lafayette CO
Steven M. Kmiec - Coventry CT

Assignee:

Stryker Corporation - Kalamazoo MI

International Classification:

A61B 1000

US Classification:

600564

Abstract:

A universal biopsy system is provided for performing percutaneous medical procedures. The biopsy system includes a cannula assembly removably coupled to a handle. The releasable coupling structures of the handle and the cannula assembly allow for rotational displacement of the cannula assembly using the handle, as well as the application of an axially directed force, either toward or away from the patient.