Delivery Apparatus for Pressurised Medical Liquids

摘要

A delivery apparatus for pressurised medical liquids comprises a primary reservoir (2) and a primary pressurising means (18) configured for removably pressurising medical liquid (4) in the primary reservoir (2) to a delivery pressure. A secondary reservoir (6) has an inlet (14) connected via a valve (16) to receive pressurised liquid from the primary reservoir (2). Secondary pressurising means (8,36) is arranged for supplying a compensating pressure to the received pressurised liquid to maintain it at substantially the delivery pressure as pressure is reduced in the primary reservoir (2), particularly during refilling with medical liquid from an unpressurised source (34).