CATHETER WITH SERIALLY CONNECTED SENSING STRUCTURES AND METHODS OF CALIBRATION AND DETECTION Russian patent published in 2018 - IPC A61M27/00 A61B18/14 

FIELD: medical equipment.

SUBSTANCE: group of inventions relates to medical technique, namely to devices for determining position and measuring pressure. Catheter for use with a catheterization system having a plurality of external magnetic field generators, each generating a position-data magnetic field, the catheter comprises a flexible tubing, a distal section adapted for engagement with patient tissue, the distal section has a proximal portion, distal portion and a flexible joint between the proximal portion and the distal portion, an internal magnetic field generator positioned in one of the proximal or distal portions, generating a pressure-data magnetic field, a first plurality of pressure sensing coils and second plurality of position sensing coils, positioned in the other of the proximal and distal portions, the first plurality of pressure sensing coils is adapted to sense the pressure-data magnetic field and generate signals representative of data relating to pressure exerted on the distal section when engaged with tissue, second plurality of position sensing coils is adapted to sense each of the position-data magnetic fields and generate signals representative of data relating to a position of the distal section, a first lead aerially connecting at least one pair of one of the first plurality of pressure sensing coils and one of the second plurality of position sensing coils, and a second lead transmitting signals from the at least one pair for signal process. In a second embodiment, the catheter comprises at least one pressure sensing coil positioned in the proximal portion, each of which is adapted to sense the pressure-data magnetic field and generate signals representative of data relating to pressure, exerted on the distal section when engaged with tissue, at least two position-data coils located in the proximal portion, each of which is adapted to sense the position-data magnetic fields and generate signals, representative of data relating to a position of the distal section, a first lead aerially connecting a pair of one of at least one pressure sensing coil and one of at least two position-data coils, second lead transmitting signals from a pair, wherein the signals represent both data relating to a position of the distal section and data relating to pressure exerted on the distal section. Group of inventions includes a method of CALIBRATION of a first catheter for detecting interference with magnetic field sensing, caused by the presence of a second catheter or other metal or ferrous object.

EFFECT: use of the group of inventions provides extension of the arsenal of means for determining position and measuring pressure by means of a catheter.

20 cl, 4 dwg