Automatic electronic apparatus for measuring the bronchial resistance and the elastance of the pulmonary tissue
US4036222A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 15, 1975 |
| Grant date | Jul 19, 1977 |
| Priority date | — |
| Expiry date | Apr 15, 1995 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/085
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The invention relates to medical science. According to the invention, the resistance to air flow through the bronchial tracts and the elastance of the pulmonary tissue are measured and displayed, starting from signals which represent the respiratory air flow and the variation in endothoracic pressure, by means of an apparatus which comprises a flow signal preamplifier, a pressure signal preamplifier, two automatic calculating devices and an electronic control combination. The apparatus makes it possible to use endothoracic pressures measured via the central venous system and can possess an alarm signal which is triggered automatically if the values displayed are memorized values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.