Implantable medical device for sensing absolute blood pressure and barometric pressure
First Claim
1. A implantable medical device system for measuring barometric pressure within a patient'"'"'s body and for measuring absolute cardiac pressure within the patient'"'"'s heart comprising:
- an implantable medical device for powering an absolute pressure sensor and for processing absolute cardiac pressure signal values and for powering a barometric pressure sensor and for processing barometric pressure signal values;
an implantable absolute pressure sensor adapted to be located in a pressure measurement site of the patient'"'"'s heart coupled with said implantable medical device for deriving and providing absolute cardiac pressure signal values to said implantable medical device for processing;
lead means for coupling said implantable absolute pressure sensor with said implantable medical device for providing power to said absolute pressure sensor and for conveying absolute cardiac pressure signal values to said implantable medical device; and
an implantable barometric pressure sensor adapted to be located at a site removed from the patient'"'"'s heart that is not affected by cardiac pressure for deriving and providing barometric pressure signal values to said implantable medical device for processing in conjunction with said absolute cardiac pressure values.
1 Assignment
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Accused Products
Abstract
An implantable barometric pressure sensor coupled with an implantable medical device (IMD) provides a barometric pressure related, reference pressure value for use in combination with an absolute pressure value measured by an implantable absolute pressure sensor coupled to the IMD. In one embodiment, the barometric pressure sensor is implanted under the skin and subcutaneous tissue layer at or near the implant site of the IMD. In variations of this embodiment, the barometric pressure is formed as part of a connector module of the IMD or extends from the connector module. In a further embodiment, a percutaneous access device is provided which is adapted to be implanted to extend through the skin and subcutaneous tissue layer of the patient and is coupled with the barometric pressure sensor to provide for an air chamber extending between the atmosphere and the barometric pressure sensor. The barometric pressure sensor is preferably enclosed within an air chamber of the implantable medical device, and a catheter extends between the air chamber of the implantable medical device and the percutaneous access device. Or the barometric pressure sensor is enclosed within an air chamber of the percutaneous access device, and a lead extends between the barometric pressure sensor and the implantable medical device.
404 Citations
25 Claims
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1. A implantable medical device system for measuring barometric pressure within a patient'"'"'s body and for measuring absolute cardiac pressure within the patient'"'"'s heart comprising:
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an implantable medical device for powering an absolute pressure sensor and for processing absolute cardiac pressure signal values and for powering a barometric pressure sensor and for processing barometric pressure signal values; an implantable absolute pressure sensor adapted to be located in a pressure measurement site of the patient'"'"'s heart coupled with said implantable medical device for deriving and providing absolute cardiac pressure signal values to said implantable medical device for processing; lead means for coupling said implantable absolute pressure sensor with said implantable medical device for providing power to said absolute pressure sensor and for conveying absolute cardiac pressure signal values to said implantable medical device; and an implantable barometric pressure sensor adapted to be located at a site removed from the patient'"'"'s heart that is not affected by cardiac pressure for deriving and providing barometric pressure signal values to said implantable medical device for processing in conjunction with said absolute cardiac pressure values. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system for measuring barometric pressure and for measuring absolute pressure within a patient'"'"'s body comprising:
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an implantable medical device for powering an absolute pressure sensor and a barometric pressure sensor and for processing barometric pressure signal values and absolute pressure signal values; an implantable absolute pressure sensor adapted to be located in a pressure measurement site of the patient'"'"'s body coupled with said implantable medical device for deriving and providing absolute pressure signal values to said implantable medical device for processing; a barometric pressure sensor located in said implantable medical device for deriving and providing barometric pressure signal values to said implantable medical device for processing; and means for providing an air passage between said barometric pressure sensor and the atmosphere exterior to the patient'"'"'s body for applying barometric pressure to said barometric pressure sensor.
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13. A system for measuring barometric pressure and for measuring absolute pressure within a patient'"'"'s body comprising:
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an implantable medical device for powering an absolute pressure sensor and a barometric pressure sensor and for processing barometric pressure signal values and absolute pressure signal values; an implantable absolute pressure sensor adapted to be located in a pressure measurement site of the patient'"'"'s body coupled with said implantable medical device for deriving and providing absolute pressure signal values of fluctuations in a physiologic pressure to said implantable medical device for processing; a barometric pressure sensor located in said implantable medical device for deriving and providing barometric pressure signal values to said implantable medical device for processing; and means for providing an air passage between said barometric pressure sensor and the atmosphere exterior to the patient'"'"'s body for applying barometric pressure to said barometric pressure sensor comprising; a percutaneous access device adapted to be implanted in the patient'"'"'s skin having an air passageway therethrough; and means coupled between said percutaneous access device and said implantable medical device for applying atmospheric air pressure to said barometric pressure sensor.
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14. An implantable medical device method for deriving relative physiologic signal value data for use by and/or storage within an implantable medical device implanted within a patient'"'"'s body comprising the steps of:
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implanting an ambient state or condition monitoring device under the skin and subcutaneous tissue layer of the patient'"'"'s body, and with the implanted ambient state or condition monitoring device, sensing an ambient state or condition outside the body affecting a sensed physiologic state or condition within the body; deriving a reference signal value from the sensed ambient state or condition; and conveying the reference signal value to the implantable medical device; implanting a physiologic state or condition monitoring device in relation with a body organ, and with physiologic state or condition monitoring device, sensing a physiologic state or condition within the body of the patient; deriving an absolute physiologic signal value from the sensed physiologic state or condition; and conveying the absolute physiologic signal value to the implantable medical device; and combining the conveyed absolute physiologic signal value and ambient signal value to derive a relative physiologic signal value therefrom. - View Dependent Claims (15, 16, 17, 18, 19)
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20. An implantable system for deriving relative physiologic signal value data for use by and/or storage within an implantable medical device implanted within a patient'"'"'s body comprising the steps of:
an ambient state or condition monitoring device adapted to be implanted under the skin and subcutaneous tissue layer of the patient'"'"'s body, the implanted ambient state or condition monitoring device further comprising, means for sensing an ambient state or condition outside the body affecting a sensed physiologic state or condition within the body; means for deriving a reference signal value from the sensed ambient state or condition; and means for conveying the reference signal value to the implantable medical device; a physiologic state or condition monitoring device adapted to be implanted in relation with a body organ, the physiologic state or condition monitoring device further comprising, means for sensing a physiologic state or condition within the body of the patient; means for deriving an absolute physiologic signal value from the sensed physiologic state or condition; and means for conveying the absolute physiologic signal value to the implantable medical device; and means in the implantable medical device for combining the conveyed absolute physiologic signal value and ambient signal value to derive a relative physiologic signal value therefrom. - View Dependent Claims (21, 22, 23, 24, 25)
Specification