Patent ID: 9510772
Filing Date: 2016-12-06
CPC Classification: A61B,A61M

Claim Text:
1. A position sensing system, comprising: an electromagnetic field generator; a distal portion of an antenna reference instrument adapted to be introduced minimally invasively into a living coronary sinus of a beating heart of a subject, the distal portion of the antenna reference instrument including at least one electromagnetic sensor and at least one electrode and having an adjustable deflection when located within the living coronary sinus; at least one roving instrument adapted to be introduced into a thorax cavity of the subject, the at least one roving instrument including at least one electrode; and a control unit configured to: with the distal portion of the antenna reference instrument located within the living coronary sinus, measure an electrical-potential difference between the at least one electrode of the antenna reference instrument and the at least one electrode of the at least one roving instrument; and with the distal portion of the antenna reference instrument located within the living coronary sinus, calibrate the measured electrical-potential difference using the determined position coordinates of the antenna reference instrument to determine position coordinates of the at least one roving instrument.