Esophageal function and EKG monitor
US4503859A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 16, 1983 |
| Grant date | Mar 12, 1985 |
| Priority date | — |
| Expiry date | Jun 16, 2003 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/4205
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A monitoring system which records data relating to esophageal acidity fluctuations. The data is recorded on a miniature tape recorder and is then played back and converted to a visually perceptible format. The system has a unique interface circuit for converting the voltage difference between an esophageal probe and a reference electrode into a frequency modulated signal for recording. Another interface circuit reconverts the recorded frequency modulated signal into a voltage for a strip chart recorder. A multi-monitor embodiment is also disclosed which records data relating to esophageal spasms and heart activity in addition to esophageal acidity fluctuations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.