SYSTEM FOR MEASURING VITAL SIGNS USING BILATERAL PULSE TRANSIT TIME
First Claim
1. A device for measuring a patient'"'"'s vital signs, comprising:
- a housing;
a first sensor, attached to the housing, comprising a first electrode and a first optical system configured to generate a first optical signal;
a second sensor, attached to the housing, comprising a second electrode;
an amplifier system, in electrical contact with the first and second electrodes, configured to processes electrical signals from the first and second electrodes to generate an electrical waveform; and
,a microprocessor, in electrical communication with the amplifier system and first optical system, the microprocessor configured to process the electrical waveform and first optical signal, or at least one derivative thereof, with an algorithm to determine at least one of the patient'"'"'s vital signs.
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Accused Products
Abstract
The invention provides a monitor for measuring blood pressure and other vital signs from a patient without using a cuff. The invention provides a hand-held device for measuring vital signs (e.g. blood pressure) from a patient that features: i) a housing that encloses a first sensor, that includes a first electrode and a first optical system configured to generate a first optical signal; ii) a second sensor that includes a second electrode and a second optical system configured to generate a second optical signal; iii) an amplifier system, in electrical contact with the first and second electrodes, configured to processes electrical signals from the first and second electrodes to generate an electrical waveform; and iv) a microprocessor, in electrical communication with the amplifier system, first optical system, and second optical system, the microprocessor configured to process the electrical waveform and first and second optical signals with an algorithm to determine at least one of the patient'"'"'s vital signs.
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Citations
24 Claims
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1. A device for measuring a patient'"'"'s vital signs, comprising:
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a housing; a first sensor, attached to the housing, comprising a first electrode and a first optical system configured to generate a first optical signal; a second sensor, attached to the housing, comprising a second electrode; an amplifier system, in electrical contact with the first and second electrodes, configured to processes electrical signals from the first and second electrodes to generate an electrical waveform; and
,a microprocessor, in electrical communication with the amplifier system and first optical system, the microprocessor configured to process the electrical waveform and first optical signal, or at least one derivative thereof, with an algorithm to determine at least one of the patient'"'"'s vital signs. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A hand-held device for measuring a patient'"'"'s vital signs, comprising:
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a housing configured to be held in the patient'"'"'s hand; a first sensor, attached to the housing and configured to receive a finger from the patient'"'"'s left hand, comprising a first electrode and a first optical system configured to generate a first optical signal; a second sensor, attached to the housing and configured to receive a finger from the patient'"'"'s right hand, comprising a second electrode and a second optical system configured to generate a second optical signal; an amplifier system, in electrical contact with the first and second electrodes, configured to processes electrical signals from the first and second electrodes to generate an electrical waveform; and
,a microprocessor configured to process the electrical waveform or a processed version thereof, first optical signal or a processed version thereof, and the second optical signal or a processed version thereof with an algorithm to determine at least one of the patient'"'"'s vital signs.
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21. A device for measuring a patient'"'"'s vital signs, comprising:
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a housing; a first sensor, attached to the housing, comprising a first electrode and a first optical system configured to generate a first optical signal; a second sensor, attached to the housing, comprising a second electrode and a second optical system configured to generate a second optical signal; an amplifier system, in electrical contact with the first and second electrodes, configured to processes electrical signals from the first and second electrodes to generate an electrical waveform; and
,a microprocessor configured to process the electrical waveform or a processed version thereof, the first optical signal or a processed version thereof, and the second optical signal or a processed version thereof with an algorithm to determine at least one of the patient'"'"'s vital signs.
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22. A device for measuring a patient'"'"'s vital signs, comprising:
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a first electrode; a second electrode; a first pulse detection system configured to generate a first pulse signal; a second pulse detection system configured to generate a second pulse signal; an amplifier system, in electrical contact with the first and second electrodes, configured to processes electrical signals from the first and second electrodes to generate an electrical waveform; and
,a microprocessor, in electrical communication with the amplifier system, first pulse detection system, and second pulse detection system, the microprocessor configured to process the electrical waveform and first and second pulse signals with an algorithm to determine at least one of the patient'"'"'s vital signs.
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23. A device for measuring a patient'"'"'s vital signs, comprising:
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a first optical system at a first location on a subject and configured to generate a first optical signal; a second optical system at a second location on a subject that is approximately mirror-symmetric about a patient'"'"'s sagittal plane to that of the first location and configured to generate a second optical signal; and
,a microprocessor, in electrical communication with the first optical system and second optical system, the microprocessor configured to process the first and second optical signals with an algorithm to determine at least one of the patient'"'"'s vital signs.
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24. A method for calculating blood pressure, comprising:
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detecting an electrical waveform corresponding to the potential difference between a first electrode at a first location on a subject and a second electrode at a second location on a subject; detecting a first pulse signal on a subject and calculating a first time difference between the occurrence of a first feature on the electrical waveform and a second feature on the first pulse signal; detecting a second pulse signal on a subject and calculating a second time difference between the second pulse signal and the first pulse signal; and
,calculating the subject'"'"'s blood pressure using the first time difference, the second time difference, and an algorithm relating those time differences to blood pressure.
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Specification