400 d is a surgical cautary machine . Both mono polar and bi polar with double food switch and accessorize.
What is HF Coagulation?
It is a way of coagulation to the 5mm depth of tissue. form a patient plate with a large surface area, a high frequency current is conducted through the patient's body to an active electrode. Once a given minimum value is exceeded, this current density eads to the heating (joule heat), which is necessary for coagulation purposes, close to an active electrode.
Therefore the purpose off ccoagulation is completely accom plished in the HF coagulation. the rate of complate recovery is the epoch-marking change over than 95% at a time comparing any electro surgery with cold steel surgery. The reason is that depth of coagulation is decided by the electrode itself being not affected and determined by doctor's skill, beause the device is designed to coagulate to 5mm depth of tissue. That why HF coagulation is a very simple and safe way of coagulation.