Heart analysis using pressure-controlled intermittent coronary sinus occlusion
US4969470A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 4, 1989 |
| Grant date | Nov 13, 1990 |
| Priority date | — |
| Expiry date | Oct 4, 2009 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/3355
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The coronary sinus is intermittently occluded by use of means for occluding the sinus, a pressure transducer for sensing the fluid pressure within the sinus and providing corresponding fluid pressure signals, and a controller responsive to the transducer and arranged to provide trigger signals to the occluding means to trigger an occlusion and to interrupt the occlusion, the system being characterized in that the controller is arranged to estimate a plateau level of the fluid pressure during each occlusion and for providing a trigger signal to interrupt each occlusion on the basis of the estimate. The duration of the interruption before the next occlusion is controlled in response to the volume flow in the sinus during the interruption. Pharmacological agents are injected into the sinus during the occlusion, for retroperfusion to the heart tissue. An analysis of heart function is obtained by analyzing the local pressure maxima in successive heartbeats during occlusion. Initiation of the next occlusion is timed based on fluid pressure signals taken from the sinus during occlusion. The degree of tissue at risk of infarction (or the amount of infarcted tissue) is estimated based on th…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.