Apparatus for patient-controlled infusion

Details Apparatus for patient-controlled infusion Apparatus for patient-controlled infusion

A - Human Necessities

61

M

A61M 5/142 (2006.01) A61M 5/14 (2006.01)

Patent

CA 2112365

A reservoir (3) is connected to a manually operable pump such as an aspirating syringe (1) via a flow control tube (4) which has a fine bore of accurately known size. Actuation of the syringe (1) by the patient discharges a fixed volume of drug via a non-return valve (5) to the patient. The syringe (1) is refilled by a return spring (2) drawing liquid from the reservoir (3) at a rate controlled by the bore of the flow control tube (4), thus silting a maximum dosage rate.

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