In-vivo calibration of contact force-sensing catheters using auto zero zones
US10791950B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 30, 2011 |
| Grant date | Oct 6, 2020 |
| Priority date | — |
| Expiry date | Jun 9, 2034 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2560/0223
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method for the in vivo re-calibration of a force sensing probe such as an electrophysiology catheter provides for the generation of an auto zero zone. The distal tip of the catheter or other probe is placed in a body cavity within the patient. Verification that there is no tissue contact is made using electrocardiogram (ECG) or impedance data, fluoroscopy or other real-time imaging data and/or an electro-anatomical mapping system. Once verification that there is no tissue contact is made, the system recalibrates the signal emanating from the force sensor setting it to correspond to a force reading of zero grams and this recalibrated baseline reading is used to generate and display force readings based on force sensor data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.