During irrigation, which statement about its effect on energy delivery is NOT accurate?

During irrigation, which statement about its effect on energy delivery is NOT accurate?

• A. Accurate Measure of Tissue Temperature
• B. Cooler Electrode Temperatures
• C. Higher Power Delivery Safe
• D. Reduced Thrombus Formation

Answer: (A)

Irrigation cools the electrode-tissue interface, which changes how energy is delivered during ablation. By flushing saline through the catheter tip, heat is carried away more efficiently, so you can apply higher power without overheating the surface. That cooling also keeps the electrode temperature lower, reducing risk of char and thrombus formation, and it helps keep delivery safer at higher power settings. The trade-off is in temperature sensing. The thermocouple or sensor at the tip reflects the cooled electrode temperature, not the actual tissue temperature deeper underneath. Because the tissue can heat up more than the cooled surface, relying on the electrode tip temperature underestimates true tissue temperature. So the statement that irrigation provides an accurate measure of tissue temperature isn’t accurate, even though the other statements describe real effects of irrigation on energy delivery.

Irrigation cools the electrode-tissue interface, which changes how energy is delivered during ablation. By flushing saline through the catheter tip, heat is carried away more efficiently, so you can apply higher power without overheating the surface. That cooling also keeps the electrode temperature lower, reducing risk of char and thrombus formation, and it helps keep delivery safer at higher power settings.

The trade-off is in temperature sensing. The thermocouple or sensor at the tip reflects the cooled electrode temperature, not the actual tissue temperature deeper underneath. Because the tissue can heat up more than the cooled surface, relying on the electrode tip temperature underestimates true tissue temperature. So the statement that irrigation provides an accurate measure of tissue temperature isn’t accurate, even though the other statements describe real effects of irrigation on energy delivery.