(19)

(11)

EP 0 594 620 A1

(12)

(43) Date of publication: 04.05.1994 Bulletin 1994/18 (21) Application number: 91915140.0 (22) Date of filing: 15.07.1991

(51) International Patent Classification (IPC):  A61N 1/ 36( . ) A61N 1/ 362( . ) (86) International application number: PCT/US1991/004972 (87) International publication number: WO 1993/001861 (04.02.1993 Gazette 1993/04)

(84) Designated Contracting States: FR GB (71) Applicant: ZMD CORPORATION Wilmington, DE 19810 (US)	(72) Inventor: FREEMAN, Gary, A. Newton Centre, MA 02159 (US) (74) Representative: TER MEER - MÜLLER - STEINMEISTER & PARTNER  Mauerkircherstrasse 45 D-81679 München D-81679 München (DE)