INTRACORPOREAL PRESSURE MEASUREMENT DEVICES AND METHODS
First Claim
1. A pressure measurement system, comprising:
- an implantable target pressure sensor;
an implantable internal reference pressure sensor located remotely from the target pressure sensor;
an external reference pressure sensor configured to wirelessly transmit a local atmospheric pressure signal; and
a controller in communication with the implantable target pressure sensor and the implantable internal reference pressure sensor, the controller configured to;
determine a correlation factor between a signal from the implantable internal reference pressure sensor and the local atmospheric pressure signal from the external reference pressure sensor at times when the external reference pressure sensor is in communication with the controller;
determine a calibrated reference pressure based on a signal from the implantable internal reference pressure sensor and a correlation factor at times when the external reference pressure sensor is not in communication with the controller; and
determine a relative physiological target pressure valueat times when the external reference pressure sensor is in communication with the controller, by adjusting the signal from the target pressure sensor by the signal from the external reference pressure sensor; and
at times when the external reference pressure sensor is not in communication with the controller, by adjusting the signal from the target pressure sensor by a calibrated reference pressure.
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Accused Products
Abstract
The invention relates to devices, systems, and methods for the measurement of a pressure within a body that is adjusted to compensate for variations in local atmospheric pressure. A pressure measurement system can include an implantable target pressure sensor, an implantable internal reference pressure sensor located remotely from the target pressure sensor, an external reference pressure sensor configured to transmit a telemetric signal that is indicative of the local atmospheric pressure, and at least one condition indicator. The implantable medical device system further includes a controller configured to determine a correlation factor based on a signal from the implantable reference pressure sensor and the signal from the external reference pressure sensor.
131 Citations
20 Claims
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1. A pressure measurement system, comprising:
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an implantable target pressure sensor; an implantable internal reference pressure sensor located remotely from the target pressure sensor; an external reference pressure sensor configured to wirelessly transmit a local atmospheric pressure signal; and a controller in communication with the implantable target pressure sensor and the implantable internal reference pressure sensor, the controller configured to; determine a correlation factor between a signal from the implantable internal reference pressure sensor and the local atmospheric pressure signal from the external reference pressure sensor at times when the external reference pressure sensor is in communication with the controller; determine a calibrated reference pressure based on a signal from the implantable internal reference pressure sensor and a correlation factor at times when the external reference pressure sensor is not in communication with the controller; and determine a relative physiological target pressure value at times when the external reference pressure sensor is in communication with the controller, by adjusting the signal from the target pressure sensor by the signal from the external reference pressure sensor; and at times when the external reference pressure sensor is not in communication with the controller, by adjusting the signal from the target pressure sensor by a calibrated reference pressure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A pressure measurement system comprising:
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an implantable target pressure sensor; an implantable internal reference pressure sensor located remotely from the target pressure sensor; an external reference pressure sensor configured to wirelessly transmit a local atmospheric pressure signal; at least one condition indicator; and a controller in communication with the implantable target pressure sensor, the implantable internal reference pressure sensor, and the at least one condition indicator, the controller configured to; determine a correlation factor between a signal from the implantable internal reference pressure sensor and the local atmospheric pressure signal from the external reference pressure sensor at times when the external reference pressure sensor is in communication with the controller; determine a calibrated reference pressure based on a signal from the implantable internal reference pressure sensor and a correlation factor at times when the external reference pressure sensor is not in communication with the controller; and determine a relative physiological target pressure value in response to a signal from the at least one condition indicator.
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12. A method for determining local atmospheric pressure from within the body of a patient, the method comprising:
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providing an implantable local pressure sensor and at least one condition indicator within a human body; providing an implantable medical device comprising a controller that is configured to receive signals from the implantable local pressure sensor and the at least one condition indicator; providing an external reference pressure sensor that is configured to transmit a wireless signal to the controller; determining and storing a correlation factor when the external reference pressure sensor is in communication with the controller;
the correlation factor based on a comparison of a signal from the implantable local pressure sensor and the signal from the external reference pressure sensor; anddetermining a local atmospheric pressure value. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification