Electrocardiographic measurement method for controlling an intra-aortic balloon pump
US4809681A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 30, 1987 |
| Grant date | Mar 7, 1989 |
| Priority date | — |
| Expiry date | Mar 30, 2007 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/3303
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A pair of spaced electrodes are disposed inside the thoracic aorta near the heart and are used to sense R- and P-waves in an ECG signal. The electrodes are moved to an ideal intra-aortic position, which is that where R- and P-waves are sensed to have the same magnitude, the P-wave, which occurs earlier than the R-wave, serving as means for accurately predicting the occurrence of the R-wave. The electrodes are affixed to the distal end of an intra-aortic balloon, which is capable of being disposed at the ideal position by monitoring of the R- and P-waves sensed by the electrodes. The balloon is deflated at the occurrence of the R-wave, which has been correctly predicted by the earlier P-wave.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.