Infusion pump for use with prepackaged IV bags
First Claim
1. An infusion pump for use with a flexible bag containing a charge of prepackaged intravenous solution, said bag having a pair of sidewalls and a dispensing port adapted for discharging the solution along a flow path through intravenous tubing for delivery to a patient, the pump comprising the combination of a housing;
- a compartment within the housing for receiving said bag;
an inflatable chamber having a diaphragm which at least partially envelopes the chamber;
pressurizing means operable in a delivery mode for directing fluid under pressure into said inflatable chamber for causing said diaphragm to expand, said pressurizing means further being operable in a recovery mode for directing fluid from the inflatable chamber for enabling said diaphragm to contract; and
means for positioning the flexible bag at a position within the compartment at which the bag sidewalls are caused to be compressed together responsive to said expansion of the diaphragm for pressurizing said charge of intravenous solution with the pressurized intravenous solution being discharged through the dispensing port.
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Accused Products
Abstract
An infusion pump for use with standard pre-filled single dose IV bags. The pump includes an inflatable chamber having a diaphragm which expands under fluid pressure to compress the sidewalls of an IV bag. A fluid is directed under pressure to the chamber for causing it to inflate under influence of a control system. In one embodiment the fluid comprises a liquid which is transferred to and from the chamber from a reservoir. In another embodiment the fluid comprises a gas.
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Citations
17 Claims
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1. An infusion pump for use with a flexible bag containing a charge of prepackaged intravenous solution, said bag having a pair of sidewalls and a dispensing port adapted for discharging the solution along a flow path through intravenous tubing for delivery to a patient, the pump comprising the combination of a housing;
- a compartment within the housing for receiving said bag;
an inflatable chamber having a diaphragm which at least partially envelopes the chamber;
pressurizing means operable in a delivery mode for directing fluid under pressure into said inflatable chamber for causing said diaphragm to expand, said pressurizing means further being operable in a recovery mode for directing fluid from the inflatable chamber for enabling said diaphragm to contract; and
means for positioning the flexible bag at a position within the compartment at which the bag sidewalls are caused to be compressed together responsive to said expansion of the diaphragm for pressurizing said charge of intravenous solution with the pressurized intravenous solution being discharged through the dispensing port. - View Dependent Claims (2, 3, 4, 5, 6)
- a compartment within the housing for receiving said bag;
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7. An infusion pump for use with a flexible bag containing a charge of prepackaged intravenous solution, said bag having a pair of sidewalls and a dispensing port adapted for discharging the solution along a flow path through intravenous tubing for delivery to a patient, said pump comprising the combination of a compartment for receiving said bag;
- a storage reservoir for containing a supply of fluid;
an inflatable chamber having a diaphragm which at least partially envelopes the chamber;
pump means operable in a delivery mode for pumping fluid under a predetermined pressure from said storage reservoir into said inflatable chamber for causing said diaphragm to expand; and
means for positioning the flexible bag at a position within the compartment at which the bag sidewalls are caused to be compressed together responsive to said expansion of the diaphragm for pressurizing said charge of intravenous solution with the pressurized solution being discharged through the dispensing port. - View Dependent Claims (8, 9, 10, 11, 12)
- a storage reservoir for containing a supply of fluid;
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13. A method of infusing intravenous solution from a flexible bag with the bag having a pair of sidewalls and a dispensing port adapted for discharging the solution along a flow path through intravenous tubing for delivery to a patient, the method comprising the steps of holding the bag with a charge of intravenous solution contained therein against the diaphragm of an expandable chamber;
- pressurizing a fluid within said chamber to a pressure level sufficient to cause said chamber to expand;
moving said diaphragm against the bag and compressing said sidewalls together responsive to said expansion of the chamber;
pressurizing said charge of solution within the bag responsive to compression of the bag sidewalls; and
discharging said solution under pressure out through said dispensing port along said flow path and through said intravenous tubing. - View Dependent Claims (14, 15, 16, 17)
- pressurizing a fluid within said chamber to a pressure level sufficient to cause said chamber to expand;
Specification