Patent ID: 8939930
Filing Date: 2015-01-27
Classification: A61M

Abstract:
1. A high-pressure drug pump device comprising: a drug reservoir; an exit member for fluidically connecting the reservoir with a drug injection site; a flow restrictor for restricting fluid flow through the exit member, the flow restrictor having a flow resistance factor of at least 10 an electrolysis pump comprising a pump chamber in mechanical communication with the drug reservoir via an intervening displacement member, the electrolysis pump being operable to exert a pressure of at least 5 psi to drive the displacement member toward the exit member and thereby force therethrough fluid in the drug reservoir; and circuitry for operating the pump to generate a pressure of at least 5 psi, the circuitry and the flow restrictor cooperating to cause continuous fluid flow through the exit member at a constant flow rate in the range from about 400 nl/min to about 5 μl/min.