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Medisys PLC
03 March 2004



Embargoed until 0700 3 March 2004


Medisys PLC

('Medisys' or 'the Group')


Hypoguard Named in Complaint for Patent Infringement

Medisys announces that Hypoguard, the Group's diagnostics division, has been
named as one of four defendants in a Complaint For Patent Infringement made by
Roche Diagnostics Corporation in the Indianapolis Division of the United States
District Court. The other named defendants are Apex Biotechnology Corp.
('Apex'), Medline Industries, Inc. and Home Diagnostics, Inc.

The Complaint alleges that the use and sale of the Assure family of blood
glucose monitoring system products, which includes Assure, Assure II and Assure
3, infringe two patents owned by Roche. The Assure products are manufactured
and supplied to Hypoguard by Apex under the terms of a supply and distribution
agreement (the 'Agreement'). The Agreement includes an indemnity, given by Apex
to Hypoguard, for liability arising from the Assure products infringing the
intellectual property of a third party. Apex has confirmed that it will stand
behind such indemnity in relation to Roche's Complaint.

Hypoguard is currently investigating the validity of the patents cited by Roche
in the Complaint and assessing whether or not the allegations in Roche's
Complaint have any merit. Following the completion of this exercise Hypoguard
will respond to the Complaint and further update shareholders.


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Enquiries:
Medisys PLC 020 7563 5200
Michael Barry, Chief Financial Officer

Weber Shandwick Square Mile 020 7067 0700
Terry Garrett /Susanne Walker