(19)

(11)

EP 0 578 691 A1

(12)

(43) Date of publication: 19.01.1994 Bulletin 1994/03 (21) Application number: 92907612.0 (22) Date of filing: 03.04.1992

(51) International Patent Classification (IPC):  A61B 5/ 042( . ) A61J 15/ 00( . ) (86) International application number: PCT/GB1992/000601 (87) International publication number: WO 1992/017150 (15.10.1992 Gazette 1992/26)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IT LI LU MC NL SE (30) Priority: 05.04.1991 GB 19910007195 (71) Applicants: COLSON, Deborah Jill London N5 2SN (GB) COSTELOE, Kathleen Louise London EC2V 5AA (GB)	(72) Inventors: COLSON, Deborah Jill London N5 2SN (GB) COSTELOE, Kathleen Louise London EC2V 5AA (GB) (74) Representative: Cooke, William Douglas, et al  Hughes Clark & Co. P.O. Box 22 114/118 Southampton Row London WC1B 5AA London WC1B 5AA (GB)