Pulse oximeter with motion detection
First Claim
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1. A method of analyzing pulse oximetry measurements made on a patient, comprising:
- taking pulse oximetry measurements of the patient at a measurement site;
detecting motion of at least a part of the patient; and
analyzing pulse oximetry measurements taken at times selected according to the detected motion of the at least part of the patient.
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Abstract
There is a need for a technique to compensate for, or eliminate, motion-induced artifacts in patient-attached critical care monitoring instruments. Consequently, the invention is directed to improving pulse-oximetry by incorporating additional signals to aid in the triggering of the pulse-oximeter or in analyzing the data received by the pulse oximeter. This includes detecting when the patient moves and analyzing the pulse-oximetry data in light of the detected movement.
303 Citations
40 Claims
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1. A method of analyzing pulse oximetry measurements made on a patient, comprising:
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taking pulse oximetry measurements of the patient at a measurement site;
detecting motion of at least a part of the patient; and
analyzing pulse oximetry measurements taken at times selected according to the detected motion of the at least part of the patient. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system for making a pulse oximetry measurement of a patient, comprising:
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means for taking pulse oximetry measurements of the patient at a measurement site;
means for detecting motion of at least part of the patient; and
means for analyzing pulse oximetry measurements taken at times selected according to the detected motion of the at least part of the patient.
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13. An apparatus for measuring oxygen saturation of hemoglobin at a measurement site on a patient, comprising:
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a controller having a motion detector unit having a first input to receive an input signal related to motion of at least a part of the patient and an oxygen saturation unit having a second input to receive signals related to measurements of oxygen saturation of hemoglobin made at the measurement site, wherein the controller analyzes signals related to measurements of oxygen saturation made at times selected based on the input signal related to the motion of the at least part of the patient. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21)
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22. A sensor unit for making measurements of hemoglobin oxygen saturation on a patient, comprising:
a body attachable to the patient having one or more optical ports for delivering light to the patient at first and second wavelengths for measuring hemoglobin oxygen saturation, the body including a motion sensor. - View Dependent Claims (23, 24, 25)
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26. A method of analyzing pulse oximetry measurements made on a patient, comprising:
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taking pulse oximetry measurements of the patient at a measurement site using a pulse-oximetry sensor head; and
electronically detecting motion of the pulse-oximetry sensor head relative to the measurement site. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33)
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34. A system for analyzing pulse oximetry measurements made on a patient, comprising:
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means for taking pulse oximetry measurements of the patient at a measurement site using a pulse-oximetry sensor head; and
means for electronically detecting motion of the pulse-oximetry sensor head relative to the measurement site.
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35. A system for measuring oxygen saturation of hemoglobin at a measurement site on a patient, comprising:
a controller having an oxygen saturation unit having a first input to receive signals from a pulse-oximeter sensor head, a first motion detector analyzer having a first input to receive an input signal related to motion of at least a part of the patient; and
a second motion detector analyzer having a second input to receive an input signal related to motion of the sensor head. - View Dependent Claims (36, 37, 38, 39, 40)
Specification