Impedance monitoring for detecting pulmonary edema and thoracic congestion
US8131356B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 7, 2007 |
| Grant date | Mar 6, 2012 |
| Priority date | — |
| Expiry date | Jun 4, 2029 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/4878
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An implantable medical device includes a housing for the implantable device that is sized for implantation in a chest region of a patient and includes a housing electrode. A left ventricular lead port is connectable to a proximal end of a lead having first and second insulated conductors that extend from the proximal end of the lead to corresponding first and second electrodes near a distal end of the lead. An electrical impedance measurement circuit is electrically connected to the left ventricular lead port and the housing electrode. The circuit may inject current between the first lead electrode and the housing electrode, and measure a voltage potential, created by the current injection, between the second lead electrode and the housing electrode. The ratio of the measured voltage to injected current may be used for assessing pulmonary edema. The lead electrodes may be located in a left ventricular coronary vein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.