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US 2010/0249559 A1Published application
Medical Device For Assessing Intravascular Blood Volume And Technique For Using The Same
AssigneeNelicor Puritan Bennett LLC
InventorDavid Lovejoy
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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.
Claims20
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.
2 more elements
A monitor, comprising:
- 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.
1 more element
A system for automatically controlling delivery of a fluid, comprising:
- 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.
4 more elements
Dependencies are inferred from the claim text.