Single sensor pressure differential device
US4901731A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 27, 1988 |
| Grant date | Feb 20, 1990 |
| Priority date | — |
| Expiry date | Apr 27, 2008 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/0215
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An apparatus and method for sensing in vivo the fluid pressure differential between spaced locations in a biological fluid vessel using a single pressure transducer. The transducer has a deformable member mounted to a housing; a conduit extends within the housing with one end opening at a location spaced from the transducer and the other end opening adjoining the inner surface of the member. With the housing inserted in the biological fluid vessel, the outer surface of the deformable member is exposed to the fluid pressure adjacent the member, while the inner surface is exposed to the fluid pressure within the conduit. The deformable member flexes in response to the fluid pressure differential across the member, which is a direct measure of the fluid pressure differential between spaced-apart locations in the fluid-filled vessel. Strain gauges are mounted to the member to generate a signal indicative of the pressure differential, with electrical leads coupled to the strain gauges and received in a catheter threaded in the vessel. In a preferred embodiment, the transducer is mounted proximal to an angioplasty balloon and the conduit opens distal to the balloon. This arrangement can …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.