Fluid infusion delivery system
First Claim
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1. A fluid infusion delivery system comprisingan IV catheter for placement in a vein;
- a fluid line extending from said catheter for delivery of a fluid thereto;
a disposable primary pump connected to said fluid line for delivery a predetermined dose of fluid into said line within a predetermined pressure range; and
a disposable secondary pump connected to said fluid line for delivery a second fluid into said line under a continuous positive pressure less than said pressure range to maintain said catheter patent in the absence of the delivery of fluid from said primary pump.
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Abstract
The infusion delivery system has a primary pump for delivering a medicament into an implanted catheter in a vein as well as a second pump for delivering saline solution into the catheter in order to keep the vein upon completion of the delivery of medicament of the vein. The secondary pump operates under a pressure less than that of the primary pump.
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Citations
20 Claims
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1. A fluid infusion delivery system comprising
an IV catheter for placement in a vein; -
a fluid line extending from said catheter for delivery of a fluid thereto; a disposable primary pump connected to said fluid line for delivery a predetermined dose of fluid into said line within a predetermined pressure range; and a disposable secondary pump connected to said fluid line for delivery a second fluid into said line under a continuous positive pressure less than said pressure range to maintain said catheter patent in the absence of the delivery of fluid from said primary pump. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 20)
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13. A fluid infusion delivery system comprising
an IV catheter for placement in a vein; -
a fluid line extending from said catheter for delivery of a fluid thereto; a primary pump connected to said fluid line for delivering a predetermined dose of medicament into said line; and a secondary pump connected to said line for delivering a saline solution into said line under a continuous positive pressure sufficient to keep the vein open after delivery of said medicament dose. - View Dependent Claims (14)
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15. A dual pump for fluid infusion comprising
a housing having a pair of end walls, a third wall intermediate said end walls and an outlet port in one of said end walls; -
a first piston slidably mounted in said housing to define a drug-receiving reservoir with said third wall; a compressed spring between said first piston and the other of said end walls; means for selectively holding said spring in a compressed state and releasing said spring from said compressed state to bias said first piston towards said wall to impose a pressure on a drug in said reservoir; a tube in communication with and extending between said reservoir and said outlet port to conduct a drug therethrough under pressure; an annular piston slidably mounted in said housing and on said tube in spaced relation to said one end wall to define a saline-solution receiving reservoir therebetween; a second spring to bias said annular piston towards said one end wall to impose a pressure on saline in said saline-solution receiving reservoir; and a one-way valve between said saline-solution receiving reservoir and said outlet port to conduct saline solution therethrough. - View Dependent Claims (16, 17, 18)
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19. A fluid infusion delivery system comprising
an IV catheter for placement in a vein; -
a fluid line extending from said catheter for delivery of a fluid thereto; a disposable primary pump connected to said fluid line for delivering a predetermined dose of fluid into said line within a predetermined pressure range; a disposable secondary pump connected to said fluid line for delivering a second fluid into said line under a continuous positive pressure less than said predetermined pressure range to maintain said catheter patent in the absence of the delivery of fluid from said primary pump; and a one-way valve between said secondary pump and said fluid line to prevent a flow of fluid from said primary pump into said secondary pump.
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Specification