05658133 is referenced by 104 patents and cites 67 patents.

A medical infusion pump (10) for delivering liquids to a patient includes an elastomeric pump chamber (140) contractable between a refill position and a discharge position. An inlet valve (122) is operatively associated with an elastomeric inlet (142) supplying liquid to the pump chamber (140). The inlet valve (122) is selectively positionable in an open position permitting and a closed position preventing flow of liquid between the inlet (142) and the pump chamber (142). An outlet valve (124) is operatively associated with an elastomeric outlet (144) which conveys liquid from the pump chamber (140). The outlet valve (124) is selectively positionable in an open position permitting and a closed position preventing flow of liquid between the outlet (144) and pump chamber (140). A pump motor (256) and associated plunger (120) contracts and expands the pump chamber (140) between the refill position and the discharge position. An electronic control (542) operatively associated with the pump motor (256) and plunger (120) and the inlet and outlet (122, 124) valves actuates the pump motor (256) and the inlet and outlet valves (122, 124) to drive liquid through the pump chamber (140) in a predetermined pumping cycle. The electronic control (542) includes a routine for dissipating ballooning in the pump chamber (140), the inlet (142) or the outlet (144) by delaying movement of the pump motor (256) with the pump chamber (140) in the contracted position and the outlet valve (124) in the open position a select amount of time.

Title
Pump chamber back pressure dissipation apparatus and method
Application Number
209519
Publication Number
5658133
Application Date
February 15, 1995
Publication Date
August 19, 1997
Inventor
Larry Blankenship
Boulder
CO, US
Warren P Heim
Boulder
CO, US
Daniel C Colesworthy III
Boulder
CO, US
Robert L Anderson
Boulder
CO, US
Agent
T D Bratschun
P E Schaafsma
F C Kowalik
Assignee
Baxter International
IL, US
IPC
F04B 49/00
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