Wireless Pressure Sensing Shunts
First Claim
1. An implantable valve, comprising:
- a housing having a reservoir adapted to receive fluid flow therethrough between an inlet port and an outlet port;
a substrate disposed within said reservoir; and
a radio frequency tag disposed on the substrate within the reservoir and including circuitry adapted to change one or more electromagnetic characteristics in response to pressure applied thereto by fluid in the reservoir and to produce a response to a wireless signal characterized by the one or more electromagnetic characteristics that correlates to a pressure of fluid in the reservoir,the radio frequency tag further including a memory for storing data, the memory residing on the same substrate as the circuitry adapted to change one or more electromagnetic characteristics in response to pressure applied thereto.
7 Assignments
0 Petitions
Accused Products
Abstract
Devices and methods useful for sensing or measuring a pressure and remotely indicating or communicating that pressure are provided. The devices and methods have particular utility in sensing pressures in implantable medical devices and more particularly in hydrocephalus shunts. In one exemplary embodiment, an implantable valve can include a housing having a reservoir adapted to receive fluid flow therethrough between an inlet port and an outlet port. The implantable valve can also include a needle-penetrable septum to allow fluid delivery to the reservoir and/or a needle guard disposed within the housing and adapted to protect the radio frequency tag from a needle penetrating into the housing. A radio frequency (RF) tag can be disposed within the reservoir and can be adapted to change one or more of its electromagnetic characteristics in response pressure applied thereto by fluid in or flowing through the reservoir. The RF tag can produce a response to a wireless signal characterized by the one or more electromagnetic characteristics that correlates to a pressure of fluid in or flowing through the reservoir.
130 Citations
20 Claims
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1. An implantable valve, comprising:
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a housing having a reservoir adapted to receive fluid flow therethrough between an inlet port and an outlet port; a substrate disposed within said reservoir; and a radio frequency tag disposed on the substrate within the reservoir and including circuitry adapted to change one or more electromagnetic characteristics in response to pressure applied thereto by fluid in the reservoir and to produce a response to a wireless signal characterized by the one or more electromagnetic characteristics that correlates to a pressure of fluid in the reservoir, the radio frequency tag further including a memory for storing data, the memory residing on the same substrate as the circuitry adapted to change one or more electromagnetic characteristics in response to pressure applied thereto. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An implantable valve, comprising:
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a housing defining a reservoir for receiving fluid flow therethrough; a valve assembly disposed in the housing and adapted to control a rate of fluid flow through the reservoir; a substrate disposed within said reservoir; and a radio frequency tag disposed on the substrate in the reservoir and including circuitry adapted to measure a pressure of fluid in the reservoir and to indicate the measured pressure via at least one electromagnetic characteristic of the radio frequency tag, the radio frequency tag including a memory for storing data, the memory residing on the same substrate as the circuitry adapted to measure the pressure of fluid. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A method for measuring ventricular pressure, comprising:
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positioning a distal end of a ventricular catheter within a patient'"'"'s ventricle; coupling a proximal end of the ventricular catheter to a valve inlet formed on an implantable valve, and coupling a valve outlet formed on the valve to a drainage catheter such that fluid flows from the ventricle through a reservoir in the valve to the drainage catheter, wherein a rate of fluid flowing through the valve is controlled by a valve assembly disposed within the implantable valve; wirelessly obtaining a pressure measurement of a pressure of fluid in the valve by detecting a electromagnetic characteristic a response of a radio frequency tag associated with the valve; and storing data in a memory in the radio frequency tag. - View Dependent Claims (17, 18, 19, 20)
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Specification