Electrosurgical vessel sealing is a special system developed by TANVI ELECTROMEDICAL APPLIANCES for minimal access and open surgery. This technology can facilitate a range of minimal access surgical procedures, helping to meet government objectives of reduced length of stay for patients in hospital. Each of these devices comprises an electrosurgical unit (ESU) with a high power and low voltage bipolar mode and specialist instruments that combine tissue compression with tissue heating to produce haemostasis in arteries, veins or a bundle of tissue. This is a technology which is different from conventional diathermy and provides a unique combination of pressure and energy to create vessel fusion and permanently fuses vessels up to and including 7 min in diameter and tissue bundles, without dissection or isolation.