Which method of catheter cooling involves internal cooling only?

The method of catheter cooling that involves internal cooling only is closed-loop catheter cooling. This technique utilizes a catheter designed with internal channels that circulate a coolant fluid directly within the catheter itself. The coolant absorbs heat from the surrounding tissue as it flows through the channels, maintaining an optimal temperature during procedures.

This method is beneficial as it provides effective cooling while minimizing the risk of thermal injury to adjacent tissues. The closed-loop design allows for continuous recirculation of the coolant, ensuring that the temperature is consistently regulated throughout the procedure.

In contrast, other methods mentioned involve varying degrees of external cooling or other mechanisms that do not focus solely on internal cooling within the catheter. By understanding how closed-loop catheter cooling operates, one can appreciate its effectiveness in maintaining proper thermal management during ablation procedures.