Pulse oximeter based techniques for controlling anesthesia levels and ventilation levels in subjects
First Claim
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1. A non-invasive pulse oximetry system for controlling anesthesia levels in subjects comprising:
- A light source adapted to be attached to an external appendage of a subject and configured to emit at least two distinct wavelengths of light directed at the appendage; and
A receiver adapted to be attached to the external appendage of a subject and configured to receive the light from the light source that has been directed at the appendage and generating received signals there from, wherein the pulse oximetry system derives a plurality of physiologic parameters of the subject from the received signals, and wherein the system will signal at least one alarm when the physiologic parameters are indicative of improper anesthesia levels in the subject, and wherein the physiologic parameters derived by the system include arterial pulse distention measurements and arterial breath distention measurements and wherein at least one alarm associated with anesthesia levels is based upon a comparison of the arterial distention measurements.
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Abstract
Medical devices and techniques derive breath rate, breath distention, and pulse distention measurements of a subject from a pulse oximeter system coupled to the subject. These parameters together with the conventional physiologic parameters obtained from a pulse oximeter system can be used to assist in controlling the ventilation levels and the anesthesia levels of the subject. The development has human applications and particular application for animal research.
29 Citations
15 Claims
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1. A non-invasive pulse oximetry system for controlling anesthesia levels in subjects comprising:
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A light source adapted to be attached to an external appendage of a subject and configured to emit at least two distinct wavelengths of light directed at the appendage; and A receiver adapted to be attached to the external appendage of a subject and configured to receive the light from the light source that has been directed at the appendage and generating received signals there from, wherein the pulse oximetry system derives a plurality of physiologic parameters of the subject from the received signals, and wherein the system will signal at least one alarm when the physiologic parameters are indicative of improper anesthesia levels in the subject, and wherein the physiologic parameters derived by the system include arterial pulse distention measurements and arterial breath distention measurements and wherein at least one alarm associated with anesthesia levels is based upon a comparison of the arterial distention measurements. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for controlling anesthesia levels in subjects comprising:
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Attaching a light source and receiver to an external appendage of a subject; Emitting at least two distinct wavelengths of light directed at the appendage from the light source; Receiving the light from the light source that has been directed at the appendage at the receiver; Generating received signals from the light received at the receiver; Deriving a plurality of physiologic parameters of the subject from the received signals; Generating at least one alarm when the physiologic parameters are indicative of improper anesthesia levels in the subject, wherein the plurality of physiologic parameter include arterial pulse distention measurements and arterial breath distention measurements and wherein at least one alarm associated with anesthesia levels is based upon a comparison of the arterial distention measurements; and Controlling anesthesia levels based upon at least some of the physiologic parameters. - View Dependent Claims (9)
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10. A non-invasive pulse oximetry system configured for controlling anesthesia levels in subjects comprising:
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A light source adapted to be attached to an external appendage of a subject and configured to emit at least two distinct wavelengths of light directed at the appendage; A receiver adapted to be attached to the external appendage of a subject and configured to receive the light from the light source that has been directed at the appendage and generating received signals there from, wherein the pulse oximetry system derives at least a heart rate and a breath rate of the subject from the received signals; and An alarm configured to be signaled when the ratio of heart rate and breath rate is beyond preset thresholds, and wherein the system calculates arterial pulse and breath distention measurements, and further including an alarm configured to be signaled when a comparison of pulse distention and breath distention is beyond preset thresholds. - View Dependent Claims (11, 12)
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- 13. A method of controlling at least one of the anesthesia level or ventilators settings of a subject that is receiving at least one of anesthesia or respiratory support through a ventilator, the method comprising the steps of providing a non-invasive sensor pulse oximetry system configured to calculate arterial distention measurements of the subject, and using the measured arterial distention measurements as indicators for at least one of proper and improper levels of anesthesia or proper and improper ventilator control settings wherein the non-invasive sensor system further calculates breath and pulse distention measurements and wherein a breath distention measurement that is less than the pulse distention is indicative of proper anesthesia levels and/or proper ventilation settings.
Specification