Method and apparatus for non-invasive monitoring of central venous pressure
US4986277A · kind A · utility
Inventor
Key dates
| Filing date | Aug 24, 1988 |
| Grant date | Jan 22, 1991 |
| Priority date | — |
| Expiry date | Aug 24, 2008 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/412
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method and apparatus for measuring central venous pressure (CVP) is disclosed, along with an improved transducer (50) for measuring CVP in infants. Changes in CVP may also be monitored by employing the method and apparatus of the invention. According to the invention, a transducer is disposed on the neck of a subject (or on the head in the case of infants), and the signal from the transducer is processed to obtain the cardiac component. Thereafter, the vertical distance from the transducer to a reference level is adjusted until the position is located at which the signal transitions between a venous configuration and an arterial or mixed venous-arterial configuration, at which position the vertical distance approximates CVP.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.