(19)

(11)

EP 0 435 961 A1

(12)

(43) Date of publication: 10.07.1991 Bulletin 1991/28 (21) Application number: 90900436.0 (22) Date of filing: 17.11.1989

(51) International Patent Classification (IPC):  A61B 6/ 12( . ) (86) International application number: PCT/US1989/005098 (87) International publication number: WO 1990/005486 (31.05.1990 Gazette 1990/12)

(84) Designated Contracting States: AT BE CH DE ES FR GB IT LI LU NL SE (30) Priority: 23.11.1988 US 19880276106 (71) Applicant: BOSTON SCIENTIFIC CORPORATION Watertown, MA 02172-2407 (US)	(72) Inventor: ALVAREZ DE TOLEDO, Fernando Concord, MA 01742 (US) (74) Representative: Deans, Michael John Percy, et al  Lloyd Wise, Tregear & CO. Norman House 105-109 Strand London WC2R OAE London WC2R OAE (GB)