Patent
Telemetric differential pressure sensing method
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TLDR
In this article, a differential pressure sensing device is fully implanted in the body of a patient to monitor internal pressure such as intracranial pressure, which is measured through the intact skin and a nearly coplanar membrane.Abstract:
A differential pressure sensing device is fully implanted in the body of a patient to monitor internal pressure such as intracranial pressure. A movable element in the sensor communicates with the internal pressure of the body to be measured on one side and the atmospheric pressure on the other, the latter communicated through the intact skin and a nearly coplanar membrane. The movable element's differential pressure dependent displacement changes a physical characteristic of the sensor, such as the resonant frequency of a tuned L-C circuit, and the change is detected external to the body by a radiating detector system, such as a frequency swept radio frequency oscillator, by which the internal pressure is read out.read more
Citations
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References
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Patent
Intracranial pressure monitor
TL;DR: In this article, a pressure monitoring device is implanted in the cranium to measure intracranial pressure, which comprises a passive resonant circuit having a natural frequency influenced by ambient pressure.
Patent
Intracranial pressure sensing device
TL;DR: A fluid pressure sensor for use internal to the human body including a completely ceramic sectioned outer shell having an opening therein for allowing fluid access to a thin metal diaphragm member is presented in this article.
Patent
Physiological pressure sensing and telemetry means employing a diode connected transistor transducer
TL;DR: In this article, a pressure measurement apparatus and method, the apparatus having a pressure sensitive element, an audio oscillator, a transmitter, a receiver, a frequency-to-voltage converter and a read-out device was used to measure the amount of signal voltage being fed to the readout device.
Patent
Pressure sensing system and method
TL;DR: In this paper, a pressure sensing system for measuring fluid pressure of a living body employs a resonant sonic transponder implanted inside the living body, which is a function of the fluid pressure impinging on the Transponder.
Patent
Intercranial pressure transducer
TL;DR: In this paper, a small sealed capsule is located in a trephined hole in the patient's skull, with its active face in the form of a diaphragm in contact with the dura mater.