| 摘要 |
PROBLEM TO BE SOLVED: To provide a shunt system for implantation into a patient for the purpose of diverting excess fluid from the lateral ventricles of the patient's brain to a diversion site. SOLUTION: The shunt includes a pressure transducer for measuring ICP, a rate of flow transducer for measuring the flow rate of the CSF flowing within the shunt, and telemetry circuitry. A remote reader with an antenna is provided to selectively interrogate and provide inductive power to the implanted shunt. Upon interrogation, the pressure and rate of flow measurements are calibrated, multiplexed, and transmitted on a carrier signal back to the remote reader/antenna. The reader/antenna extracts the pressure and flow rate data from the carrier wave and further separates the data by demultiplexing the signal. The reader further includes a barometer for providing local barometric pressure and uses this information together with the data from the implanted transducers. COPYRIGHT: (C)2009,JPO&INPIT |
