Power infuser
First Claim
1. A power infuser comprising at least one cardiotomy reservoir and means to charge the reservoir with fluid, fluid conduit means providing a recirculatory loop communicating from and returning to the reservoir, an air embolus sensor in a near downstream location relative to the reservoir in the loop, a non-fluid contact pump in the loop downstream of the air embolus sensor, means to control the temperature of the fluid in the loop, a bubble trap-filter in a far downstream location relative to the reservoir in the loop said bubble trap-filter having an inlet and outlet, said fluid conduit means including tubing means in fluid communication with the filter outlet at one end and with the reservoir at a second end to complete the recirculatory loop, and separate means in fluid communication with the tubing means between the bubble-trap filter outlet and reservoir to selectably discharge fluid from the loop to a patient, said discharge means being downstream of the bubble trap-filter.
0 Assignments
0 Petitions
Accused Products
Abstract
A modular, power augmented medical infusion apparatus to provide rapid transfusion of relatively large quantities of blood, blood components, colloid, and fluids to patients. All components of the infuser that contact blood are sterlie, disposable, and easily assembled. Disassembled or partially assembled the components are also easily transportable. The major components comprise a pair of filtered cardiotomy reservoirs, an air embolus sensor, a modular double roller pump, a heat exchanger, a bubble trap-filter and disposable fluid conduits. The bubble trap-filter is located in the distal most location of the recirculating loop just upstream of the Y-connector to the patient and the air sensor just downstream of the cardiotomy reservoir in the proximal location of the recirculating loop. The experimental infuser has been safely and successfully used with patients undergoing liver transplantation, combined liver and kidney transplantation, major vascular surgery, and other operations associated with large rapid transfusion requirements.
-
Citations
22 Claims
- 1. A power infuser comprising at least one cardiotomy reservoir and means to charge the reservoir with fluid, fluid conduit means providing a recirculatory loop communicating from and returning to the reservoir, an air embolus sensor in a near downstream location relative to the reservoir in the loop, a non-fluid contact pump in the loop downstream of the air embolus sensor, means to control the temperature of the fluid in the loop, a bubble trap-filter in a far downstream location relative to the reservoir in the loop said bubble trap-filter having an inlet and outlet, said fluid conduit means including tubing means in fluid communication with the filter outlet at one end and with the reservoir at a second end to complete the recirculatory loop, and separate means in fluid communication with the tubing means between the bubble-trap filter outlet and reservoir to selectably discharge fluid from the loop to a patient, said discharge means being downstream of the bubble trap-filter.
-
22. A power infuser comprising at lesat one cardiotomy reservoir, a vertical pole and base supporting said reservoir, at least one intravenous fluid bag mounted on said pole above the reservoir and in fluid communication with the reservoir, fluid conduit means providing a recirculatory loop communicating from and returning to the reservoir, an air embolus detector in a near downstream location relative to the reservoir in the loop and mounted on the pole, a roller pump in the loop downstream of the air embolus detector, the roller pump being mounted on the base, a heat exchanger in the loop and mounted on the pole, a bubble trap-filter in a far downstream location relative to the reservoir in the loop and mounted on the pole said bubble trap filter having an inlet and outlet, said fluid conduit means including tubing means in fluid communication with the filter outlet at one end and with the reservoir at a second end to complete the recirculatory loop, and separate means in fluid communication with the tubing means between the bubble trap-filter outlet and reservoir to selectably discharge fluid from the loop to a patient, said discharge means being downstream of the bubble trap-filter, said mountings on said pole being easily detachable from said pole.
Specification