Medical Device For Assessing Intravascular Blood Volume And Technique For Using The Same
First Claim
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1. A method, comprising:
- using a processor;
receiving a plethysmographic waveform signal from a sensor, wherein the plethysmographic waveform signal is generally representative of a blood oxygen saturation of a patient;
receiving information related to a patient parameter that may influence the plethysmographic waveform signal; and
determining plethysmographic waveform variability based at least in part on the plethysmographic waveform signal and/or the information related to the patient parameter.
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Abstract
Embodiments of the present invention relate to a system and method for determining a physiologic parameter of a patient. Specifically, embodiments of the present invention include methods and systems for correcting a pulse oximetry plethysmographic waveform variability measurement based on parameters that may influence the waveform variability. The corrected measurement may be used to estimate intravascular blood volume and/or fluid responsiveness of a patient.
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Citations
20 Claims
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1. A method, comprising:
using a processor; receiving a plethysmographic waveform signal from a sensor, wherein the plethysmographic waveform signal is generally representative of a blood oxygen saturation of a patient; receiving information related to a patient parameter that may influence the plethysmographic waveform signal; and determining plethysmographic waveform variability based at least in part on the plethysmographic waveform signal and/or the information related to the patient parameter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A monitor, comprising:
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an input circuit capable of receiving a plethysmographic waveform signal and information relating to a patient parameter that influences the plethysmographic waveform signal; a memory storing an algorithm configured to calculate a plethysmograhpic waveform variability based at least in part on the plethysmographic waveform signal and/or the information related to the patient parameter; and an output circuit configured to provide an indication of the plethysmograhpic waveform variability. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A system for automatically controlling delivery of a fluid, comprising:
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a delivery mechanism capable of delivering a fluid to a patient; and a controller, wherein the controller is capable of; receiving a plethysmograhpic waveform signal and information relating to a patient parameter that influences the plethysmographic waveform signal; determining a plethysmograhpic waveform variability based at least in part on the plethysmographic waveform signal and the information related to the patient parameter; and generally automatically adjusting delivery of the fluid based on a comparison of the plethysmograhpic waveform variability with a predetermined value. - View Dependent Claims (17, 18, 19, 20)
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Specification