초록 ▼

A portable infusion pump for infusing solutions from IV bags. The pump includes a housing having a compartment for removably receiving the bag in a solution-dispensing position. A push plate is mounted on the upper end of a flexible bladder having an outer wall which encloses a pressure chamber. The

A portable infusion pump for infusing solutions from IV bags. The pump includes a housing having a compartment for removably receiving the bag in a solution-dispensing position. A push plate is mounted on the upper end of a flexible bladder having an outer wall which encloses a pressure chamber. The fluid is moved from a reservoir by a peristaltic pump into the pressure chamber so that the bladder is expanded to move the pressure plate toward the IV bag for dispensing the solution through IV tubing to the patient. The bladder has a predetermined configuration so that the differential volume required to fully dispense the solution from the IV bag is less than about 75% of the volume which is swept by movement of the push plate through its full stroke length. The IV tubing is connected to the IV bag by a filling spike having an annular groove which registers with a lock structure on the end of a lid. The lid is manually opened for insertion and removal of the bag to and from the housing compartment.

대표청구항 ▼

A portable infusion pump for infusing intravenous solution from a bag through tubing into a patient, the bag having a flexible sidewall which at least partially encloses a volume to contain the solution, the bag further having a dispensing port for releasable connection with an end of the tubing, th

A portable infusion pump for infusing intravenous solution from a bag through tubing into a patient, the bag having a flexible sidewall which at least partially encloses a volume to contain the solution, the bag further having a dispensing port for releasable connection with an end of the tubing, the pump comprising the combination of a housing having a compartment for removably receiving and supporting the bag in a solution-dispensing position, a push plate positioned within the housing, said push plate having a planar area A1 which is in juxtaposed relationship with said flexible sidewall when the bag is in said solution-dispensing position, actuating means for moving the push plate against said flexible sidewall for compressing the bag and discharging solution therefrom during an infusion phase of an operating cycle, said push plate being moved by the actuating means from a home position toward the bag through a predetermined stroke length LS which is sufficient to substantially empty the solution from the bag with the volume V1 which is swept by movement of the push plate through its stroke length having the relationship V1=LS×A1, said actuating means comprising 1) a reservoir having a supply chamber for holding a supply of fluid, 2) a flexible bladder having an outer wall which encloses a pressure chamber for receiving a charge of said fluid, said outer wall being expandable from a non-operating position through a differential volume V2 which is sufficient to act against and move said push plate through said length LS, said bladder being shaped with a configuration by which said volume V2 is less than about 75% of the volume V1, and 3) pump means for pumping fluid between the reservoir and pressure chamber, said pump means being operable for pressurizing the fluid within the pressure chamber of the bladder to a pressure which is sufficient to expand the outer wall through said differential volume V2.