Abstract:
PROBLEM TO BE SOLVED: To provide a method and an instrument, which are improved for providing a surgeon with information about the position and direction of a medical instrument.SOLUTION: This endovascular delivery system includes: an endovascular prosthetic device; and a guide wire active for a signal, engaging the endovascular prosthetic device. A rotary encoder is coupled with the guide wire and the endovascular prosthetic device to provide an encoder signal on the guide wire. The encoder signal is indicative of axial angular position of the endovascular prosthetic device during implantation of the endovascular prosthetic device in the body of a patient.
Abstract:
PROBLEM TO BE SOLVED: To provide a method for measuring a place and a direction of an object in a body of a patient. SOLUTION: The method includes positioning body-electrodes in galvanic contact with a body of a patient and positioning a mapping-tool having a mapping-electrode in a plurality of regions in the body. The method further includes tracking the mapping-tool at different positions in each of the regions using a location-measuring system, and for each region, generating respective sets of calibration-currents between the body-electrodes and the mapping-electrode at the different positions in the region. A respective relation is derived for each region between the respective set of the calibration-currents and the different positions, and is used in determining the location of an investigation-tool in response to the different respective relations and investigation-tool-currents. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide an effective device and a method for identifying a target probe positioned within a living body at real time. SOLUTION: A method for position sensing includes placing at a known position within a living body of a subject a reference probe including at least one reference electrode. Electrical currents are passed through the body between the reference electrode and body surface electrodes. Characteristics of the electrical currents are measured and are used to generate an approximation of the known position of the reference probe. A correction factor is determined from a relationship between the approximation and the known position. A target probe including at least one target electrode is placed within the body of the subject and second electrical currents are passed through the body between the target electrode and the body surface electrodes. Characteristics of the second electrical currents are measured and used to generate a calculated position of the target probe. The correction factor is applied to correct the calculated position. COPYRIGHT: (C)2008,JPO&INPIT