System and method for detecting pulmonary congestion based on stroke volume using an implantable medical device
US9049995B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 12, 2012 |
| Grant date | Jun 9, 2015 |
| Priority date | — |
| Expiry date | Jul 8, 2033 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/363
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Techniques are provided for detecting pulmonary congestion based on an increase in right ventricular (RV) stroke volume over left ventricular (LV) stroke volume. In one example, the device generates an index based on accumulated differences between RV stroke volume and LV stroke volume while RV stroke volume exceeds LV stroke volume, such that the index is indicative of an ongoing imbalance between RV and LV stroke volume. The index is compared to a suitable threshold to detect a severe imbalance indicative of pulmonary edema. Additionally, techniques are described for estimating RV and LV stroke volumes based on pulmonary artery pressure, left atrial pressure, aortic pressure, LV strain or on various intracardiac or extracardiac impedance measurements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.