(19)

(11)

EP 0 596 940 A1

(12)

(43) Date of publication: 18.05.1994 Bulletin 1994/20 (21) Application number: 92916064.0 (22) Date of filing: 01.07.1992

(51) International Patent Classification (IPC):  A61L 31/ 06( . ) (86) International application number: PCT/SE1992/000494 (87) International publication number: WO 1993/000936 (21.01.1993 Gazette 1993/03)

(84) Designated Contracting States: DE ES FR GB IT (30) Priority: 10.07.1991 SE 19910001867 (71) Applicant: MEDINVENT S-756 47 Uppsala (SE)	(72) Inventor: AGERUP, Bengt S-756 47 Uppsala (SE) (74) Representative: Mrazek, Werner  Dr. Ludwig Brann Patentbyra AB P.O. Box 1344 S-751 43 Uppsala S-751 43 Uppsala (SE)