What happens to the tissue when the temperature exceeds 100°C during RF ablation?

When the temperature during RF ablation exceeds 100°C, the primary phenomenon that occurs is tissue vaporization and blood boiling. At this elevated temperature, the proteins within the tissue start to denature, and the water content in the cells transitions into vapor. This process can lead to the formation of vapor bubbles that expand and ultimately cause cellular destruction.

The boiling of blood can also lead to the rapid, uncontrolled vaporization of the liquid within the tissue, promoting additional tissue damage. This dramatic effect not only contributes to the destruction of the targeted tissue but can also enhance the overall effectiveness of the ablation procedure by ensuring that the energy delivered is efficiently utilized in causing tissue removal.

Thus, the correct understanding of what occurs at these high temperatures crucially involves recognizing the mechanisms of vaporization and boiling, which directly influence the outcome of the RF ablation treatment.