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Tissue fusion technology, or vessel sealant devices, are bipolar electrosurgery devices that rely on tissue fusion for control of blood vessels and lymphatics. These devices measure tissue impedance and subsequently deliver the appropriate the amount of energy to achieve a safe seal. Vessel sealant devices have been approved for sealing vessels up to 7 mm in diameter [15–17].

This system uses low voltage with high current. The generator senses tissue impedance (electrical resistance) and adjusts the energy to achieve hemostasis while minimizing heat and tissue carbonization (ssss1). An acoustic signal is delivered to indicate that the sealing cycle has been completed. This system denatures elastin and collagen, and the strength of the seal is dependent on the ratio of elastin and collagen within the tissues [18]. The handpiece applies a certain amount of pressure on the tissue to fuse. This amount of pressure is characteristic of the device used. Vessel sealant devices can achieve hemostasis without dissection of the blood vessels. This is particularly valuable when blood vessels are surrounded by fat or other tissues (e.g., an ovarian pedicle). A 5‐mm handpiece can also be used for blunt tissue dissection.