Esophageal transducer
US3939823A · kind A · utility
33Cited by
6References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 28, 1975 |
| Grant date | Feb 24, 1976 |
| Priority date | — |
| Expiry date | Jan 28, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L9/0033
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An esophageal transducer measures pressure due to esophageal contractions. The transducer is inserted into the esophagus at the end of a catheter. The transducer is fully contained within a housing at the end of the catheter and is capable of measuring pressure variations at all points about its entire circumference. The housing has a flexible portion extending around its entire circumference which encloses a fluid-filled section. The fluid of the fluid-filled section contacts a pressure-sensitive piezoelectric material which produces an electrical output indicative of pressure changes in the fluid-filled section.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.