Arterial line emulator
AssigneeMedwave, Inc.
InventorRoger C. Thede
Life of this patent
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Abstract
An arterial line emulator interfaces a non-invasive blood pressure monitor with an invasive blood pressure monitor. The emulator receives pressure waveform signals from the non-invasive blood pressure monitor, and receives a transducer excitation voltage from the invasive blood pressure monitor. The emulator converts the pressure waveform signal from the non-invasive blood pressure monitor into an analog signal which is scaled as a function of the excitation voltage. The scaled analog pressure signal is supplied as an input to the invasive blood pressure monitor, and emulates the signal which would be received from a catheter-based blood pressure transducer.
Claims18
A method of interfacing a non-invasive blood pressure monitor that produces digital data representing a non-invasively sensed blood pressure waveform with an invasive blood pressure monitor that provides an excitation voltage to an invasive blood pressure sensor and receives an analog pressure signal from the invasive blood pressure sensor at a pressure signal input, the method comprising:
- converting the digital data to a scaled analog signal based upon the excitation voltage;
- and
- providing the scaled analog pressure signal to the pressure signal input invasive blood pressure monitor.
A device for interfacing a non-invasive blood pressure monitor with an invasive blood pressure monitor, the device comprising:
- means for receiving a blood pressure waveform signal from the non-invasive blood pressure monitor;
- means for sensing an excitation voltage provided by the invasive blood pressure monitor;
- and
- means for providing to an input of the invasive blood pressure monitor a scaled analog pressure waveform signal which is a function of the blood pressure waveform signal received from the non-invasive blood pressure monitor and the excitation voltage sensed.
A blood pressure monitoring system comprising:
- a non-invasive blood pressure monitor that produces, at an output, a non-invasively sensed blood pressure waveform signal;
- an invasive blood pressure monitor that displays blood pressure waveforms based upon an analog waveform signal received at an input from an invasive pressure sensor energized by an excitation voltage supplied by the invasive blood pressure monitor;
- and
- an emulator connected to the output of the non-invasive blood pressure monitor and the input of the invasive blood pressure monitor for providing to the input of the invasive pressure sensor an analog signal based upon the non-invasively sensed blood pressure waveform signal and the excitation voltage which emulates the analog waveform signal produced by an invasive pressure sensor.
A method of interfacing a non-invasive blood pressure monitor with an invasive blood pressure monitor, the method comprising:
- receiving a blood pressure waveform signal from the non-invasive blood pressure monitor;
- sensing an excitation voltage provided by the invasive blood pressure;
- and
- providing a scaled analog pressure waveform signal to an input of the invasive blood pressure monitor, the scaled analog pressure waveform signal being a function of the blood pressure waveform signal received from the non-invasive blood pressure monitor and the excitation voltage sensed.
A method of interfacing a non-invasive blood pressure monitor and an invasive blood pressure monitor, the method comprising:
- receiving digital data representing a non-invasively sensed blood pressure waveform for the non-invasive blood pressure monitor;
- sensing an excitation voltage supplied by the invasive blood pressure monitor;
- producing an analog blood pressure waveform signal based upon the digital data, the analog blood pressure waveform signal having a period based upon the digital data and an amplitude based upon the digital data and an excitation voltage;
- and
- supplying the analog blood pressure waveform signal to an input of the invasive blood pressure monitor.
Dependencies are inferred from the claim text.