Blood Volume Controller During Fluid Removal
First Claim
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1. A blood volume control method comprising:
- monitoring an actual condition of a patient, wherein the condition is indicative of blood volume in the patient;
comparing the actual condition to a desired value for the condition and determining a difference between the actual condition and desired value;
if the difference exceeds a predetermined value, automatically infusing an infusion solution into the patient in response to the determination of a low blood volume.
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Abstract
A blood volume control method has been developed including: monitoring a condition of a patient (such as hematocrit (Hct)), wherein the condition is indicative of blood volume in the patient; automatically determining that the condition indicates a low blood volume in the patient; automatically infusing an infusion solution into the patient in response to the determination of a low blood volume, and automatically adjusting the infusion to maintain the monitored condition at a predetermined value.
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Citations
27 Claims
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1. A blood volume control method comprising:
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monitoring an actual condition of a patient, wherein the condition is indicative of blood volume in the patient;
comparing the actual condition to a desired value for the condition and determining a difference between the actual condition and desired value;
if the difference exceeds a predetermined value, automatically infusing an infusion solution into the patient in response to the determination of a low blood volume. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A blood volume control system comprising:
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a Hct sensor connected to a patient, measuring a Hct of blood in the patient;
an infusion pump connectable to fluid tube for providing fluid communication of a source of an infusion solution to a venous system of a patient via a catheter;
a controller receiving a signal from the Hct sensor, wherein the signal is indicative of the Hct and generating a control signal for the infusion pump, wherein the controller actuates the pump in response to an indication from the Hct sensor of a low Hct. - View Dependent Claims (10, 11, 12)
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13. A method for controlling a patients Hct using a Hct sensor and an infusion pump, said method comprising:
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sensing an actual Hct of blood in a vascular system of a patient;
determining a difference between the actual Hct and a threshold Hct;
automatically adjusting an infusion of an infusion solution to the patient to reduce the difference below a predetermined value. - View Dependent Claims (14)
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15. A method of preventing vascular volume depletion using a Hct sensor and an infusion pump, said method comprising:
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determining a current Hct of blood in a patient;
comparing the current Hct to a desired Hct value;
infusing an infusion solution to a venous system of the patient if the current Hct is below the desired Hct target value, and infusing the infusion solution into the patient at a rate determined to maintain the desired Hct target value. - View Dependent Claims (16, 17, 18, 19)
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20. A method of preventing vascular volume depletion during diuretic delivery using a Hct sensor, an infusion solution, an infusion pump and catheter, said method comprising:
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sensing an indicator of a current Hct of blood in a patient;
comparing the indicator to a target, an infusion pump connected to the vascular system of the patient, and infusing a volume expansion solution into the vascular space at a rate required to maintain the target. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27)
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Specification