Estimating cardiovascular pressure and volume using impedance measurements
US8938292B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 31, 2008 |
| Grant date | Jan 20, 2015 |
| Priority date | — |
| Expiry date | Jun 1, 2032 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N1/36564
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Techniques for estimating a cardiac chamber or vascular pressure based upon impedance are described. A device or system may measure an impedance between at least two electrodes implanted within or proximate to a cardiovascular system. The device or system may estimate a pressure of an element of the cardiovascular system based on a relationship between impedance and volume of the element, and based on a empirical relationship between the volume and the pressure. The device or system may also estimate the dimension of the element based on the impedance-volume relationship, or other characteristics based on the impedance. Because the impedance measurements may be obtained, in some examples, by using electrodes and leads implanted within the cardiovascular system and coupled to an implantable medical device, a practical estimation of a cardiovascular pressure can be obtained on a chronic basis without requiring the use other invasive sensors, such as micronanometer transducers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.