CATHETER WITH AN ELECTROMAGNETIC GUIDANCE SENSOR

摘要

The present invention relates to an electrophysiology catheter (an electrode catheter) having an electromagnetic sensor designed internally into the tip portion. The catheter is a size 7 French or 8 French of metal braided construction with preferably three lumens. The catheter has a deflectable tip utilizing an offset lumen with a puller wire, a non compressible coil in the body section and a compressible Teflon sheath in the tip section. The coil is glued to the catheter shaft at both ends of the coil but does not run through the deflectable section, thus deflection of the puller wire which deflects the tip to the coil, keeps the body from compressing and deflecting. The puller wire is soldered to a tip electrode and runs to a control handle. The electromagnetic sensor is mounted internally in the catheter tip by a combination of a hole drilled in the three lumen tip and a hollow bridging that covers the electromagnetic sensor and connects the tip electrode to the catheter shaft. Optionally mounted on the bridging tube are one or more ring electrodes adjacent to the tip electrode. The tip electrode is secured to the end of the bridging tube by an etched Teflon ring which mates the electrode stem to the inside of the ring.