Blood infusion control system
First Claim
1. A blood infusion control system for venous infusion of physiologic fluid for achieving pre-set hematocrit levels in a patient and reporting the patient'"'"'s blood volume during administration of transfusion therapy, said system comprising:
- an infusion assembly having a first infusion pump for propelling a first physiologic fluid into the body of a patient and a second infusion pump for propelling a second physiologic fluid into the body of the patient, said first and second infusion pumps having variable flowrates and operating in sychronized relationship to each other; and
a controller for controlling the operation of said first and second infusion pumps to regulate the flowrates of said first and second physiologic fluids being propelled by said first and second infusion pumps, said controller synchronizing the flowrate of said first and second infusion pumps to control the total flowrate of said first and second infusion pumps in response to a patient'"'"'s hematocrit levels and blood volume.
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Accused Products
Abstract
The Blood Infusion Control System of the present invention integrates components of rapid infusion systems with a computer controller designed to synchronize two infusion pumps in a manner that produces a pre-selected patient hematocrit (HCT*) while reporting the patient'"'"'s estimated blood volume (BVE). In order to attain HCT*, the Blood Replacement Controller (BRC) drives a dual-pump assembly to deliver streams of asanguinous fluid and blood through flexible conduits into intravenous (IV) catheters to mix with the patient'"'"'s blood volume having an initial hematocrit (HCTi). The BRC utilizes measured patient data as feedback input to control flowrates of the two-pump infusion assembly. The patient'"'"'s estimated blood volume is extrapolated from hematocrit changes in response to the fluid and blood infusion. The major components that comprise BICS are two infusion pumps, a microcomputer controller to actuate the two pumps, a heat exchanger, a bubble trap-filter, air/temperature/pressure sensors, and disposable tubing conduits. The design methodology represents a blood infusion device that can rapidly deliver filtered, bubble free, warmed volumes to patients with significant hypovolemia. This subject invention is a sample data control system that rapidly dispenses crystalloid/colloid fluids and red blood cells by venous infusion in a manner that 1) achieves HCT* in the patient and 2) reports the patient'"'"'s BVE. BICS could enhance the ability of clinical teams in operating rooms and trauma receiving areas to stabilize patients suffering cardiovascular deterioration from acute blood loss.
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Citations
20 Claims
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1. A blood infusion control system for venous infusion of physiologic fluid for achieving pre-set hematocrit levels in a patient and reporting the patient'"'"'s blood volume during administration of transfusion therapy, said system comprising:
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an infusion assembly having a first infusion pump for propelling a first physiologic fluid into the body of a patient and a second infusion pump for propelling a second physiologic fluid into the body of the patient, said first and second infusion pumps having variable flowrates and operating in sychronized relationship to each other; and a controller for controlling the operation of said first and second infusion pumps to regulate the flowrates of said first and second physiologic fluids being propelled by said first and second infusion pumps, said controller synchronizing the flowrate of said first and second infusion pumps to control the total flowrate of said first and second infusion pumps in response to a patient'"'"'s hematocrit levels and blood volume. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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- 12. A system for administering transfusion therapy to a patient, comprising a computer processor programmed to control the conjoined cyclical motion of first and second infusion pumps operating at variable flowrate ratios in combination with elements to condition physiologic fluids and blood to be acceptable for delivery through flexible tubing into patient catheters.
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20. A method for specifying variable flowrate ratios of infusion pumps comprising the steps of:
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(a) providing a computer processor programmed to control the conjoined cyclical motion of first and second infusion pumps operating at variable flowrate ratios in combination with elements to condition physiologic fluids and blood to be acceptable for delivery through flexible tubing into patient catheters; (b) achieving a variable total flowrate, as set by an operator, of said physiologic fluids and blood; (c) regulating said patient'"'"'s hematocrit level to achieve a value pre-selected by the operator; and (d) reporting an estimate of the patient'"'"'s blood volume and other related hemodynamic parameters whereby the operator can simultaneously infuse the physiologic fluids and blood into the patient without having to pre-mix these components in a mixing chamber before delivery through a single pump.
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Specification