Systems, methods, and devices for using passive pressure sensors to measure pressure at an inaccessible location
US10980436B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 1, 2017 |
| Grant date | Apr 20, 2021 |
| Priority date | — |
| Expiry date | Apr 26, 2038 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2210/1017
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
In some embodiments, systems, methods and devices for using passive pressure sensors to measure pressure at an inaccessible location are provided. In some embodiments, a system for determining pressure in a ventriculoperitoneal shunt implanted in a subject is provided, the system comprising: an acoustic source emitting signals over a range of frequencies; the ventriculoperitoneal shunt, comprising: a lumen that provides a conduit for cerebrospinal fluid between; and a passive acoustic element in a wall of the ventriculoperitoneal shunt filled with a gas, wherein the passive acoustic element emits a second signal at a resonant frequency that varies based on the pressure on the passive acoustic element; an acoustic receiver that detects the second signal and outputs an electrical signal that represents at least the resonant frequency; and a processor programmed to: receive the electrical signal; determine the pressure using the resonant frequency; and present the pressure using a display.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.