Injection catheter with needle electrode

摘要

An injection catheter for infusing therapeutic and diagnostic agents into the heart comprises a catheter body and a tip section mounted at the distal end of the catheter body. A needle control handle is provided at the proximal end of the catheter body. An injection needle extends through the tip section, catheter body, and needle control handle. The injection needle is longitudinally slidable within the tip section so that its distal end can extend beyond the distal end of the tip section upon suitable manipulation of the needle control handle. The catheter further comprises an electrode lead wire having a first end electrically connected to the injection needle and a second end electrically connected to a suitable monitoring apparatus or to a source of ablation energy. The injection needle can thus be used for mapping or ablation in addition to introducing therapeutic and diagnostic agents into the heart.

主权项

1. An injection catheter comprising:
a catheter body comprising a flexible tubing having proximal and distal ends and at least one lumen therethrough; a tip electrode mounted at the distal end of the catheter body; a needle control handle at the proximal end of the catheter body; an injection needle extending through the tip electrode, catheter body, and needle control handle and having a proximal end attached to the needle control handle and a distal end within the tip electrode, wherein the injection needle is longitudinally slidable within the tip electrode so that its distal end can extend beyond the distal end of the tip electrode upon suitable manipulation of the needle control handle; an electrode lead wire having a first end electrically connected to the injection needle and a second end electrically connected to a suitable monitoring apparatus or to a source of ablation energy; and a penetration monitoring electrode fixedly mounted on the injection needle and electrically insulated from the injection needle.