(19)

(11)

EP 0 611 289 A1

(12)

(43) Date of publication: 24.08.1994 Bulletin 1994/34 (21) Application number: 92922417.0 (22) Date of filing: 13.10.1992

(51) International Patent Classification (IPC):  A61B 5/ 00( . ) A61B 18/ 26( . ) (86) International application number: PCT/US1992/008713 (87) International publication number: WO 1993/007806 (29.04.1993 Gazette 1993/11)

(84) Designated Contracting States: DE FR GB IT (30) Priority: 15.10.1991 US 19910777639 (71) Applicants: Seton Health Care Foundation Milwaukee Wisconsin 53211 (US) JOHNSON, W., Dudley Germantown, WI 53022 (US)	(72) Inventors: JOHNSON, W. Dudley Germantown, WI 53022 (US) MUCKERHEIDE, Myron C. Port Washington, WI 53074 (US) (74) Representative: Cardwell, Stuart Martin, et al  Roystons Tower Building Water Street Liverpool, Merseyside L3 1BA Liverpool, Merseyside L3 1BA (GB)