What develops on the catheter electrode during boiling plasma, leading to increased electrical impedance?

During boiling plasma, coagulum develops on the catheter electrode. This phenomenon occurs due to the interaction of heat with the biological tissue and fluids surrounding the electrode. As the plasma energy is applied, proteins in the tissue denature and coagulate, forming a gelatinous material that adheres to the electrode surface. This coagulum acts as an insulating layer, which increases the electrical impedance of the system.

As the impedance rises, it can hinder the efficiency of energy transfer during the ablation process, potentially leading to less effective tissue destruction. Understanding this process is crucial for optimizing the operation of ablation devices and ensuring successful procedures. Coagulum formation emphasizes the importance of managing energy delivery to prevent excessive impedance and allow for effective tissue treatment.