NECKLACE-SHAPED PHYSIOLOGICAL MONITOR
First Claim
1. A necklace system for measuring a pulse oximetry (SpO2) value and configured to be worn around a patient'"'"'s neck, comprising:
- a pulse oximetry system comprising a pulse oximetry circuit connected through an oximetry cable to an optical sensor comprising a first light source operating in the red spectral region, and a second light source operating in the infrared spectral region, the pulse oximetry circuit configured to generate a first waveform representing a signal generated with the first light source, and a second waveform representing a signal generated with the second light source;
a digital processing system comprising a microprocessor configured to receive the first and second waveforms, or processed versions thereof, and configured to process the first and second waveforms, or processed versions thereof, to generate an SpO2 value; and
,a cable configured to be worn around the patient'"'"'s neck, the cable housing the pulse oximetry circuit and the digital processing system.
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Accused Products
Abstract
The invention provides a neck-worn sensor (referred to herein as the ‘necklace’) that is a single, body-worn system that measures the following parameters from an ambulatory patient: heart rate, pulse rate, pulse oximetry, respiratory rate, temperature, thoracic fluid levels, stroke volume, cardiac output, and a parameter sensitive to blood pressure called pulse transit time. From stroke volume, a first algorithm employing a linear model can estimate the patient'"'"'s pulse pressure. And from pulse pressure and pulse transit time, a second algorithm, also employing a linear algorithm, can estimate systolic blood pressure and diastolic blood pressure. Thus, the necklace can measure all five vital signs along with hemodynamic parameters. It also includes a motion-detecting accelerometer, from which it can determine motion-related parameters such as posture, degree of motion, activity level, respiratory-induced heaving of the chest, and falls.
10 Citations
17 Claims
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1. A necklace system for measuring a pulse oximetry (SpO2) value and configured to be worn around a patient'"'"'s neck, comprising:
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a pulse oximetry system comprising a pulse oximetry circuit connected through an oximetry cable to an optical sensor comprising a first light source operating in the red spectral region, and a second light source operating in the infrared spectral region, the pulse oximetry circuit configured to generate a first waveform representing a signal generated with the first light source, and a second waveform representing a signal generated with the second light source; a digital processing system comprising a microprocessor configured to receive the first and second waveforms, or processed versions thereof, and configured to process the first and second waveforms, or processed versions thereof, to generate an SpO2 value; and
,a cable configured to be worn around the patient'"'"'s neck, the cable housing the pulse oximetry circuit and the digital processing system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification