Catheter system

Abstract

An injection adaptor hub for a medical catheter.

1 .- 21 . (canceled) 
     
     
         22 . An injection electrode comprising:
 a flexible, metallic coil comprising coil windings, an insulated proximal end, an uninsulated distal end, and a lumen extending therealong;   a metallic guide rod disposed within the lumen of the metallic coil;   an injection port configured such that fluid injected into the port flows through the lumen of the metallic coil;   a connector in electrical communication with the metallic coil and configured to energize the uninsulated distal end;   a thermocouple in electrical communication with the metallic coil and configured to measure temperature at the uninsulated distal end;   wherein electrical conductors of the connector, the thermocouple, or both, extend within the lumen of the metallic coil; and   wherein a portion of the uninsulated distal end comprises a plurality of the coil windings spaced apart to allow the fluid injected through the lumen to flow out therebetween around a full exterior circumference of the lumen of the metallic coil.