In a unipolar RF system, where does the energy flow originate from?

In a unipolar RF system, energy flows from the ablation electrode to the dispersive electrode. In this configuration, the ablation electrode delivers high-frequency alternating current (RF energy) directly to the target tissue to achieve thermal ablation. This process generates heat within the tissue through resistive heating, effectively destroying the targeted cells.

The dispersive electrode serves an essential role by providing a return path for the current. It is typically placed at a distance from the ablation site on the patient's body to help ensure patient safety and effective energy dispersion. The energy flows in a circuit from the ablation electrode, through the tissue, and then returns via the dispersive electrode to the generator, facilitating the ablation process.

This flow of energy is critical for ensuring that the desired therapeutic effect is achieved while minimizing damage to surrounding healthy tissue. Understanding this energy flow is fundamental to the safe and effective use of unipolar RF systems in clinical practice.