SYSTEM AND METHOD FOR DETERMINING STROKE VOLUME OF A PATIENT
First Claim
1. A photoplethysmogram (PPG) system for determining a stroke volume of a patient, the PPG system comprising:
- a PPG sensor configured to be secured to an anatomical portion of the patient, wherein the PPG sensor is configured to sense a physiological characteristic of the patient; and
a monitor operatively connected to the PPG sensor, the monitor receiving a PPG signal from the PPG sensor, wherein the PPG signal includes a primary peak separated from a trailing peak by a dichrotic notch, the monitor comprising a pulse trending module configured to determine a slope transit time of an upslope of the primary peak of the PPG signal, the pulse trending module configured to determine a stroke volume as a function of the slope transit time.
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Accused Products
Abstract
A PPG system for determining a stroke volume of a patient includes a PPG sensor configured to be secured to an anatomical portion of the patient. The PPG sensor is configured to sense a physiological characteristic of the patient. The PPG system may include a monitor operatively connected to the PPG sensor. The monitor receives a PPG signal from the PPG sensor. The monitor includes a pulse trending module determining a slope transit time of an upslope of a primary peak of the PPG signal. The pulse trending module determines a stroke volume of the patient as a function of the slope transit time.
49 Citations
20 Claims
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1. A photoplethysmogram (PPG) system for determining a stroke volume of a patient, the PPG system comprising:
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a PPG sensor configured to be secured to an anatomical portion of the patient, wherein the PPG sensor is configured to sense a physiological characteristic of the patient; and a monitor operatively connected to the PPG sensor, the monitor receiving a PPG signal from the PPG sensor, wherein the PPG signal includes a primary peak separated from a trailing peak by a dichrotic notch, the monitor comprising a pulse trending module configured to determine a slope transit time of an upslope of the primary peak of the PPG signal, the pulse trending module configured to determine a stroke volume as a function of the slope transit time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of determining a stroke volume of a patient from a photoplethysmogram (PPG) system, the method comprising:
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securing a PPG sensor to an anatomical portion of the patient; sensing a physiological characteristic of the patient with the PPG sensor; receiving a PPG signal from the sensor at a monitor comprising a pulse trending module, wherein the PPG signal includes a primary peak separated from a trailing peak by a dichrotic notch; analyzing the PPG signal at the pulse trending module to determine a slope transit time of an upslope of the primary peak of the PPG signal; and calculating a stroke volume at the pulse trending module of the patient based on the slope transit time of the upslope of the primary peak of the PPG signal. - View Dependent Claims (12, 13, 14, 15)
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16. A tangible and non-transitory computer readable medium that includes one or more sets of instructions configured to direct a computer to:
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receive a photoplethysmogram (PPG) signal from a PPG sensor secured to an anatomical portion of a patient, wherein the PPG signal includes a primary peak separated from a trailing peak by a dichrotic notch; determine a slope transit time of an upslope of the primary peak of the PPG signal; and calculate a stroke volume of the patient based on the slope transit time of the upslope of the primary peak of the PPG signal. - View Dependent Claims (17, 18, 19, 20)
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Specification