Baseline impedance maps for tissue proximity indications
US10398348B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 19, 2017 |
| Grant date | Sep 3, 2019 |
| Priority date | — |
| Expiry date | Mar 1, 2038 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2025/0166
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A processor is configured to construct a baseline impedance model (BIM) that models a portion of a heart of a subject as a collection of three-dimensional cells, each of which corresponds to a respective volume within the heart, at least some of the cells being designated as baseline-impedance cells, for each of which the BIM specifies a respective baseline impedance, to ascertain, based on a signal received via an electrical interface, an impedance between a catheter electrode, which is within the heart, and an external electrode that is externally coupled to the subject, to identify one of the baseline-impedance cells as a reference cell, to ascertain that the catheter electrode is within a threshold distance of tissue of the heart, by comparing the ascertained impedance to the baseline impedance that is specified for the reference cell, and to update a map of the tissue in response to the ascertaining.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.