Patent ID: 6672841
Filing Date: 2004-01-06
Classification: A61M,F04B,G01F

Abstract:
A pumping device for delivering and metering medical fluids comprising:a. a membrane unit having a membrane bordering a first chamber; b. a pumping unit connected to the first chamber by a hydraulic unit containing hydraulic fluid that is in fluid connection with the first chamber; c. a hydraulic sensor in fluid connection with the hydraulic unit, the hydraulic sensor adapted and arranged for measuring the pressure of the fluid within the hydraulic unit; d. a measuring device for measuring the pumping unit output; and e. a control unit connected to the measuring device, the pumping unit, and the hydraulic sensor; wherein the control unit is adapted and arranged for controlling the pumping unit output based on the measurements of the measuring device, and wherein the control unit is adapted for shutting off the pumping unit in response to a measured pressure outside a predetermined range.