Patent ID: 8870787

Claim:
A ventricular shunt system comprising: a catheter assembly comprising: a valve having an inlet port and an outlet port, the valve configured to control a rate of fluid flow between the inlet port and the outlet port; a ventricular catheter having a distal end and a proximal end, the proximal end of the ventricular catheter being coupled to the inlet port of the valve; a drainage catheter having a distal end and a proximal end, the proximal end of the drainage catheter being coupled to the outlet port of the valve; at least one pressure sensor mountable on a portion of the catheter assembly comprising a passive electrical resonant circuit that is configured to be selectively electromagnetically coupled to an ex-vivo source of radio frequency (RF) energy; wherein the passive electrical resonant circuit is variable in response to the pressure in a patient's ventricle, wherein each passive electrical resonant circuit, in response to the electromagnetic coupling, is configured to generate an output signal characterized by a frequency that is dependent upon urged movement of a portion of the passive electrical resonant circuit and is indicative of pressure in the patient's ventricle, wherein the passive electrical resonant circuit of the at least one pressure sensor comprises an inductance-capacitance (LC) resonant circuit that comprises an inductor operably coupled to a capacitor; and a sealed reservoir having a distal end positionable proximate the distal end of the ventricular catheter, the sealed reservoir configured to contain a non-compressible fluid, wherein a portion of the distal end of the reservoir is pliable, wherein the at least one pressure sensor is mountable to detect the pressure of the non-compressible fluid within the sealed reservoir, and wherein the at least one pressure sensor is mounted in a wall of the reservoir.