PUMP DRIVE AND CONTROL SYSTEM FOR INFUSION TO AND ASPIRATIONFROM A SURGICAL SITE

摘要

A pumping system for use in medical applications where liquids must be infus ed and aspirated, and which is cost effective to simply dispose of it after a single use. The system features positive displacement pump(s) (64, 80) such as reciprocating pump(s) which may contain a damping mechanism to dampen out th e peaks and valleys in the fluid pressure that is pumped, which is important f or preventing cavitation. Embodiments furthermore feature a shut-off valve (76) on the extraction side so that certain injected fluids such as contrast medium, are not immediately pumped out of the patient. In a preferred embodiment, the system also features means for independently controlling the fluid pressure/volume on the infusion and extraction sides, self-priming capability, a continuous fluid path, and visual air bubble detection (20), with viewports located at important points in the fluid path, such as at pum ps and valves.