System for, and method of, acquiring physiological signals of a patient
First Claim
1. In combination for determining individual ones of a plurality of physiological conditions of a patient, an amplifier constructed to measure and process the physiological rights of the patient and to provide analog signals representative of the measurements, an analog-to-digital converter operationally coupled to the amplifier for converting the analog signals to digital signals, a microprocessor for selecting individual ones of the physiological signals to be measured and processed by the amplifier and for adjusting characteristics of the amplifier to measure and process the selected physiological signals, the microprocessor being operative to receive the digital signals from the converters, and a member operatively coupled to the microprocessor for receiving the digital signals from the microprocessor.
1 Assignment
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Accused Products
Abstract
A host directs a microprocessor to command each of a plurality of amplifiers to process signals relative to individual ones of a plurality of physiological signals in a patient. The signals are provided to the amplifiers by terminals which are connected to different parts of the patient'"'"'s body. The terminals provide signals to the amplifiers simultaneously but the microcompressor processes the signals sequentially. The microprocessor tests and calibrates the amplifiers before processing the signals from the terminals. The amplifiers have substantially the same construction regardless of where the associated terminals are disposed on the patient'"'"'s body. The amplifiers may be provided with characteristics to eliminate noise and to provide output signals in a limited frequency range in which the relative phases of the signals in the limited frequency range are preserved.
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Citations
95 Claims
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1. In combination for determining individual ones of a plurality of physiological conditions of a patient,
an amplifier constructed to measure and process the physiological rights of the patient and to provide analog signals representative of the measurements, an analog-to-digital converter operationally coupled to the amplifier for converting the analog signals to digital signals, a microprocessor for selecting individual ones of the physiological signals to be measured and processed by the amplifier and for adjusting characteristics of the amplifier to measure and process the selected physiological signals, the microprocessor being operative to receive the digital signals from the converters, and a member operatively coupled to the microprocessor for receiving the digital signals from the microprocessor.
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8. In combination for determining individual ones of a plurality of physiological conditions of a patient,
a plurality of amplifiers each constructed to measure and process the physiological conditions of the patient and to provide analog signals representative of the measurements, a microprocessor for selecting individual ones of the physiological signals to be measured and processed by each of the amplifiers, each of the amplifiers being operatively coupled to the microprocessor to measure and process the individual ones of the physiological conditions selected by the microprocessor to be measured and processed, and a sample-and-hold circuit operatively coupled to the amplifiers to provide for a simultaneous measurement of the selected physiological signals in the amplifiers and to process the physiological signals sequentially.
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16. In combination for determining individual ones of a plurality of physiological conditions parameters of a patient,
a plurality of amplifiers each operative to provide measurements and processing of the physiological conditions of a patient, input circuitry operative to select an operation of each of the amplifiers to measure and process individual ones of the physiological conditions, sample-and-hold circuitry operative to sample the amplifiers simultaneously to obtain physiological signals representative of the individual ones of the physiological conditions selected for the amplifiers and to process the physiological signals from the different amplifiers sequentially, and output circuitry for analyzing the characteristics of the processed signals.
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23. In combination for determining individual ones of plurality of physiological conditions of a patient in each of a plurality of channels,
a host for indicating individual ones of the physiological conditions of the patient in each of the channels, a plurality of amplifiers each disposed in an individual one of the channels, a microprocessor responsive to the indications from the host of the individual ones of the physiological signals for the channels to provide the physiological signals for the channel, the amplifiers being operative upon the provision of the individual ones of the physiological signals for the channel to provide output signals indicative of the physiological condition, the microprocessor being responsive to the signals from the amplifiers for introducing the signals to the host.
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28. In a combination for determining individual ones of a plurality of physiological conditions of a patient in each of a plurality of channels,
a plurality of amplifiers each constructed to provide signals indicative of individual ones of the different physiological conditions, a plurality of terminals each connected to an individual one of the amplifiers to provide to the amplifier signals indicative of the individual ones of the physiological conditions for amplification of the signals by the amplifier, the terminals being adapted to be applied to the body of the patient, a host for indicating the physiological conditions to be determined by each of the amplifiers, and a microprocessor responsive to signals from the host for introducing the signals to the amplifiers to control the operation of each of the amplifiers in providing signals in an individual range of frequencies dependent upon the physiological conditions being measured by the amplifier where the characteristics of the signals from the amplifier are representative of the physiological conditions being provided by the amplifier.
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34. In combination for determining individual ones of a plurality of physiological conditions for a patient in each of a plurality of channels,
a plurality of amplifiers each constructed to provide signals indicative of individual ones of the plurality of different physiological conditions, each of the amplifiers including a high pass filter and a gain control circuit, a plurality of terminals each connected to an individual one of the amplifiers to provide to the amplifiers signals indicative of the individual ones of the physiological conditions from the amplifiers, the terminals being adapted to be applied to the body of the patient, a microprocessor associated with the amplifiers for adjusting the operation of the high pass filters in each of the amplifiers in accordance with the physiological conditions to be indicated by the amplifiers and for adjusting the gain of the amplifiers to be within particular minimum and maximum limits, and a host for providing instructions to the microprocessor to control the adjustments provided by the microprocessor in the high pass filter in each of the amplifiers.
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39. In combination for determining individual ones of a plurality of physiological conditions of a patient,
a plurality of programmable recorders for indicating individual ones of the physiological conditions of the patient, a central archive and study evaluation center for instructing each of the recorders to indicate individual ones of the physiological conditions of the patient, a digital subscriber line, first ones of the recorders being operative to communicate with the station through the digital subscriber line, a high speed modem, second ones of the recorders being operative to communicate with the station on a wireless basis through the modem, each of the recorders being operative to transmit to the stations signals indicative of the physiological conditions being determined by the recorder in accordance with the instructions from the station, the station being responsive to the signals from each of the recorders to determine if the recorder is operating properly and being operative, upon an improper operation of the recorders, to change the operation of the recorders to have the recorders operate properly.
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45. In a combination for determining individual ones of a plurality of physiological conditions of a patient,
a plurality of programmable recorders for indicating individual ones of the physiological conditions of the patient, a central archive and study evaluation station for instructing each of the recorders to indicate individual ones of the physiological conditions of the patient, a digital subscriber line, first one of the recorders being operative to communicate with the station through the digital signal line, a high speed modem, second ones of the recorders being operative to communicate with the station on a wireless basis through the modem, each of the recorders being operative to transmit to the station signals indicative of the physiological conditions being determined by the recorder in accordance with the instructions from the station.
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50. In combination in an amplifier for determining individual ones of a plurality of physiological conditions of a patient,
means for providing input signals representing the individual ones of the physiological conditions, a differential filter-amplifier for amplifying the input signals in a first range of frequencies and for rejecting noise, a filter for providing signals in a range of frequencies reduced relative to the range of frequencies of the signals from the differential filter-amplifier, and a stage providing an adjustable gain in the signals from the differential filter-amplifier to provide the gain within particular upper and lower limits.
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55. In combination for determining individual ones of a plurality of physiological conditions of a patient,
a filter having differential properties for receiving input signals representative of individual ones of the physiological conditions of the patient and for passing the signals in a first range of frequencies while reducing noise, a differential amplifier for providing a further elimination of noise and a gain in amplification in the signals from the filter, a gain stage for providing gain in the signals from the differential amplifier between particular maximum and minimum levels and for providing a stable D C reference, and a low pass filter for passing the signals only in a reduced range of frequencies relative to the signals from the gain stage and for preserving the relative phases of the signals in the reduced frequency range.
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62. In combination for determining individual ones of a plurality of physiological conditions of a patient,
a low pass filter having differential properties for receiving input signals representative of individual ones of the physiological conditions of the patient and for passing the signals in a first range of frequencies while reducing noise, a low pass filter providing a limit on amplitude for passing quickly the signals from the low pass filter, a gain stage responsive to the signals from the low pass filter for providing a gain in the signals within particular maximum and minimum limits, and a low pass filter for passing the signals from the gain stage only in a reduced range of frequencies relative to the signals from the gain stage and for preserving the relative phases of the signals in the reduced frequency range.
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68. In combination for determining individual ones of a plurality of physiological conditions of a patient,
a low pass filter having differential properties for receiving input signals representative of individual ones of the physiological conditions of the patient in a first range of frequencies while reducing noise, stages for controlling the amplitude and gain of the signals from the low pass filter and for providing a stable DC reference for a processing of the signals, and a low pass filter for passing the signals only in a reduced range of frequencies relative to the range of frequencies of the signals passed by the high pass filter and for preserving the relative phases of the signals in the reduced frequency.
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73. A method of determining individual ones of a plurality of physiological conditions of a patient, including the steps of:
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downloading a program for a PSSR solid state recorder (PSSR) from a host, adjusting the characteristics of the amplifier in accordance with the program from the host, providing a calibration of the amplifier and adjusting the amplifier to meet calibration standards, adjusting impedances in the amplifier in accordance with the program downloaded to the amplifier, adjusting the frequency range of the amplifier in accordance with the program downloaded to the amplifier from the host, testing and adjusting the gain of the amplifier to provide the gain within particular upper and lower limits when the calibration test has been completed, and sending data from the amplifier to the host when the previous steps have been successfully completed.
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77. A method of determining individual ones of a plurality of physiological conditions of a patient, including the steps of:
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downloading a program for a PSSR from a host, testing and adjusting the gain of the amplifier to provide the gain within particular upper and lower limits, adjusting the frequency range of the amplifier in accordance with the program downloaded to the amplifier, and determining the physiological signals of the patient in accordance with the program provided to the amplifier from the host. - View Dependent Claims (79, 80)
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82. A method of determining individual ones of a plurality of physiological conditions for a patient including the steps of
downloading programs for a plurality of amplifiers from a host, attenuating the signals in the amplifiers to a first range of frequencies, producing particular gains in the amplifiers, and attenuating the signals in the first range of frequencies to signals in a second range of frequencies lower than the first range of frequencies while maintaining the phases of the signals in the second range of frequencies.
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87. A method of determining individual ones of a plurality of physiological conditions of a patient, including the steps of:
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downloading instructions to a plurality of amplifiers from a host relating to the individual ones of the physiological conditions of the patient to be determined by each of the amplifiers, adjusting the characteristics of each of the amplifiers to provide measurements of the physiological conditions of the amplifiers in accordance with the instructions from the host, and providing the measurements in the amplifiers of the physiological conditions to be measured by the amplifiers in accordance with the instructions from the host.
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92. A method of determining individual ones of a plurality of physiological parameters, including the steps of:
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introducing instructions from a host to each of a plurality of amplifiers to have the amplifier determine individual ones of the physical parameters of the patient, simultaneously determining the individual ones of the physiological parameters in each of the amplifiers in accordance with the instructions from the host, and sequentially providing outputs indicating the individual ones of the physiological parameters of the amplifiers in the plurality.
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Specification