Intracranial monitoring and therapy delivery control device, system and method
First Claim
1. A system for measuring intracranial fluid pressure in a patient, the system comprising:
- (a) a subcutaneously implanted hermetically sealed implantable medical device;
(b) a lead coupled to the implantable medical device having a capacitive pressure sensor for measuring absolute intracranial fluid pressure;
(c) an external device having a barometric pressure sensor;
wherein the external device and the implantable medical device are configured to communicate telemetrically with one another such that the external device may uplink data sensed, stored or processed by the implantable medical device, a proximal end of the lead being configured for attachment to the implantable medical device, the capacitive pressure sensor being configured to receive electrical power from an electrical energy source disposed within the implantable medical device, the capacitive pressure sensor having a metal diaphragm for sensing pressure and generating signals representative thereof, electrical and electronic circuitry being disposed within the implantable medical device and configured to receive signals generated by the capacitive pressure sensor; and
wherein the implantable medical device is configured to combine first data representative of the intracranial fluid pressure signals and second data representative of the barometric pressure signals to derive third data representative of intracranial gage pressure.
1 Assignment
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Accused Products
Abstract
An implantable medical device having an hermetically sealed enclosure housing electrical and electronic circuitry and a battery for powering such circuitry is connected to an intracranial lead or pigtail which measures or senses intracranial physiologic signals such as intracranial fluid pressure and/or temperature. The implantable medical device is preferably implanted subcutaneously beneath a patient'"'"'s skin and telemeters stored data or real-time-sensed data to an external device which may be configured to combine barometric pressure data with intracranial pressure data to derive intracranial gage pressure. The implantable medical device and its associated lead reduce the risk of intracranial infections.
545 Citations
14 Claims
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1. A system for measuring intracranial fluid pressure in a patient, the system comprising:
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(a) a subcutaneously implanted hermetically sealed implantable medical device;
(b) a lead coupled to the implantable medical device having a capacitive pressure sensor for measuring absolute intracranial fluid pressure;
(c) an external device having a barometric pressure sensor;
wherein the external device and the implantable medical device are configured to communicate telemetrically with one another such that the external device may uplink data sensed, stored or processed by the implantable medical device, a proximal end of the lead being configured for attachment to the implantable medical device, the capacitive pressure sensor being configured to receive electrical power from an electrical energy source disposed within the implantable medical device, the capacitive pressure sensor having a metal diaphragm for sensing pressure and generating signals representative thereof, electrical and electronic circuitry being disposed within the implantable medical device and configured to receive signals generated by the capacitive pressure sensor; and
wherein the implantable medical device is configured to combine first data representative of the intracranial fluid pressure signals and second data representative of the barometric pressure signals to derive third data representative of intracranial gage pressure.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification