(19)

(11)

EP 0 834 075 A1

(12)

(43) Date of publication: 08.04.1998 Bulletin 1998/15 (21) Application number: 96917588.0 (22) Date of filing: 10.06.1996

(51) International Patent Classification (IPC):  G01N 33/ 538( . ) G01N 33/ 543( . ) (86) International application number: PCT/GB1996/001393 (87) International publication number: WO 1996/042017 (27.12.1996 Gazette 1997/04)

(84) Designated Contracting States: DE FR GB IT SE (30) Priority: 08.06.1995 GB 19950011586 (71) Applicant: TEPNEL MEDICAL LIMITED Knutsford, Cheshire WA16 9PD (GB)	(72) Inventors: MINTER, Stephen, John New Mills SK12 4QL (GB) WRAITH, Michael Altrincham, Cheshire WA15 4YN (GB) (74) Representative: Atkinson, Peter Birch, et al  MARKS & CLERK, Sussex House, 83-85 Mosley Street Manchester M2 3LG Manchester M2 3LG (GB)