Detection of pressure waves transmitted through catheter/lead body
US5899927A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 17, 1997 |
| Grant date | May 4, 1999 |
| Priority date | — |
| Expiry date | Oct 17, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N1/36514
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
In an implanted medical device, a method and apparatus for detecting pressure waves caused by movement of a body organ, muscle group, limb or the like and transmitted through a catheter or lead body to the implanted medical device employing a pressure wave transducer mounted in relation to the proximal end of the catheter or lead to detect the transmitted pressure waves. The system may also include a reference transducer having the same pressure wave response characteristics as the pressure wave transducer but isolated from the proximal connector end for providing a reference signal including common mode pressure wave noise that both transducers are simultaneously subjected to. The pressure wave signal and the reference signal are preferably amplified, bandpass filtered to the body pressure wave of interest and stored, telemetered out or used to trigger a device operation. The pressure and reference wave transducers preferably are piezoelectric crystal transducers or accelerometers in direct or indirect mechanical contact with the proximal connector end of the catheter and is encapsulated from the body within a device connector assembly. Preferably, the catheter is a lead extending…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.