Compared with monopolar, bipolar energy delivery is characterized by which statement?

• A. Bipolar energy requires higher energy and causes more lateral tissue damage.
• B. Bipolar energy delivery generally requires lower energy and causes less lateral tissue damage than monopolar.
• C. Bipolar devices cannot seal vessels.
• D. Bipolar energy is the same as monopolar.

Answer: (B)

In electrosurgery, the way the current travels differs between bipolar and monopolar systems. Bipolar energy is confined to the tissue between the two tips of the instrument, so the energy is delivered with lower voltage and current density. This focused delivery achieves effective coagulation and seal with less overall energy and much less lateral heat spread to surrounding tissues. Monopolar energy, by contrast, sends current from the active tip through the patient to a distant return pad, creating a broader current path, higher voltages, and more widespread thermal spread, increasing the potential for collateral tissue damage.

Because of this, bipolar energy generally requires lower energy and causes less lateral tissue damage than monopolar, making it particularly suitable for precise vessel sealing and reducing risk to adjacent structures. The other statements are incorrect because bipolar devices can seal vessels, and bipolar is not the same as monopolar in energy delivery and tissue effects.