Hospira, Inc.

David T Wang

Marwan A Fathallah

Lori E Lucke

Robert P Cousineau

John Stephen Ziegler

Mansour A Saleki

Robert R Boyd

Kent D Abrahamson

Howard L Greene

Eric R Navin

Michael W Lawless

Brian A Kidd

Peter J Scaramuzzi

Benjamin T Mullin

A method and pump that accurately senses air in a fluid delivery line pulses or activates and deactivates the air sensor(s) multiple times during the pumping phase of the fluid delivery cycle and can generate alarms based upon a single indication or a cumulative indication of air in the line. The pump can include multiple air sensors spaced along the delivery line so that the method can use the multiple signals therefrom to distinguish real moving air bubbles from false positives and/or air bubbles adhered to the inner wall of the line.

System for reducing air bubbles in a fluid delivery line

System and method for reducing air bubbles in a fluid delivery line

A medical pump with an improved continuity low flow delivery system and method for use with a pumping chamber, for example in a cassette, is disclosed. The pump includes a pump drive for exerting a force on the pumping chamber and a sensor for sensing the force/pressure exerted by the pump drive on the pumping chamber. The pump drive position sensor senses the position of the pump drive. The medical pump also includes a processing unit and a memory having a programming code adapted to calculate the rate of change of the sensed force/pressure values and determine whether the rate of change of the sensed force/pressure values meets a rate of change threshold. Once the rate of change threshold is met, the programming code is adapted to calculate a remaining pump drive travel value for determining how much farther the pump drive should travel before the end of an effective pump cycle. The programming code is further adapted to trigger one or more signals to drive the pump drive for the remainder of the effective pump cycle using the remaining pump drive travel value.

System and method for improved low flow medical pump delivery

Growing community of inventors

Sunnyvale, CA, United States of America

David T Wang