Introduction: The systems of energy in surgery are applied in order to achieve better and more effective performing of procedures. Whereas various energy sources, including electricity, ultrasound, laser and argon gas, may be used, the fundamental principle involves tissue necrosis and hemostasis by heating. ELECTRO SURGERY: Electro Surgery is a surgical technique by which surgical procedures are performed by focused heating of the tissue using devices based on high-frequency currents. It represents one of the most frequently used energy systems in laparoscopy. ULTRASOUND ENERGY: The basic principle of operation of the ultrasound surgical instruments is the usage of low-frequency mechanic vibrations (ultrasound energy within the range of 20-60 kHz) for cutting and coagulation of tissue. LASER: Laser is the abbreviation for Light Amplification by Stimulated Emission of Radiation, aimed at increasing light by stimulated emission of radiation and it is the name of the instrument which generates coherent beam of light. ARGON PLASMA COAGULATION: It has been in use since 1991 for endoscopic hemostasis. It uses high-frequency electric current and ionized gas argon. The successful application of devices depends on the type of surgical procedure, training of the surgeon and his knowledge about the device. Surgeons do not agree on the choice of device which would be optimal for a certain procedure.
Conclusion: The whole team in the operating room must have the basic knowledge of the way an energy system works so as to provide a safe and effective treatment of patients. The advantages and shortcomings of different systems of energy have to be taken into account while we use a special mode.