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Surgical diathermy machine consists of high frequency power oscillator

There are 4 types of Electro surgery technique

1.Cutting

2.Coagulation

3.fulguration

4.Haemostasis

Electro surgical techniques

1.Monopolar- the current flows from active electrode through the patient to neutral electrode( Patient Plate )-

Disposable patient plate 

Eg. L&T,Vally Lab,Martin

2.Bipolar - here two types of electrodes used the current passed between electrodes and return to the generator without passing patient- safest 

Disposable Pencils ,Dispoable Bipolar forceps