(19)

(11)

EP 0 653 921 A1

(12)

(43) Date of publication: 24.05.1995 Bulletin 1995/21 (21) Application number: 93917985.0 (22) Date of filing: 04.08.1993

(51) International Patent Classification (IPC):  A61B 17/ 00( . ) (86) International application number: PCT/GB1993/001645 (87) International publication number: WO 1994/003112 (17.02.1994 Gazette 1994/05)

(84) Designated Contracting States: AT BE CH DE DK ES FR GR IE IT LI NL PT SE (30) Priority: 05.08.1992 GB 19920016656 (71) Applicant: NATIONAL HEART & LUNG INSTITUTE London SW3 6LY (GB)	(72) Inventor: REDINGTON, Andrew 50 Mortlake Road Surrey TW9 4AT (GB) (74) Representative: Nettleton, John Victor, et al  Abel & Imray Northumberland House 303-306 High Holborn London, WC1V 7LH London, WC1V 7LH (GB)