Automatic dual rate i.v. administration

Details Automatic dual rate i.v. administration Automatic dual rate i.v. administration

A - Human Necessities

61

M

128/91

A61M 5/14 (2006.01)

Patent

CA 1160528

ABSTRACT OF THE DISCLOSURE This invention relates to a new device for use in piggyback I.V. administration sets. The device allows for automatic switching between primary and secondary liquids to be intermittently administered at different rates. The device comprises a first receiving chamber with an inlet for primary liquid, a second receiving chamber with an inlet for secondary liquid, a delivery chamber having a common outlet for both liquids and an intermediate chamber between the delivery chamber and the receiving chambers. The intermediate and first receiving chambers are separated by a hydrophilic micro- porous membrane which when wet, passes primary liquid but not air at the maximum pressure within the device. The membrane is located in the upper portion of the device in position to retain air on the downstream side thereof to prevent back-flow of secondary liquid therethrough. This construction allows for a more efficient and operable device then found with the prior art.

420727

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