Using touching or inserting radiator microwave can generate high temperature at very small parts of human body and cause local coagulation of biological tissue to achieve operation or therapy purpose.
l Basic theory
Human tissue is a comparatively ideal load of microwave absorption(when water content>90%).Once microwave radiate,ultrahigh- frequency current around radiator generates heat to electric resistance of human biological tissue and causes temperature rising.The degree and range of temperature rising are determined by the characteristics of radiator、the frequcncy、power and action time of microwave.From microstand point,microwave can lead to ultra-high speed polarized vibration of biomolecule,which generates calory.
l Main characteristics
¡ Internal heating,high performance,quick
Because the heat source is not the radiator but human body tissue around it ,so it is called internal heating.what’s more,because of the bad heat conductivity of human body tissue(similar to cork wood),it is hard for calory to arrive exterior.so it has the features of high frequency and speed.It takes just few seconds to stop bleeding and coagulate.
¡ Easy control,strong applicability
The design of various kinds of radiators can meet therapy and operation request for different parts.For example, on one hand,you can insert small pinhead radiator at the end of slender coaxial cable into stomach to stop bleeding through endoscope biopsy hole,on the other hand,you can also use esophageal dilator radiator to dredge and congeal esophageal obstruction and it is widely used.
¡ Safe and reliable,no side effect
There is no need to adopt protection measures because the microwave leakage of this equipment is small and it is intermittency short emission. On the contrary,due to the disinfection and sterilization action of microwave,there is no need to consider infection and complication. Clinic proved that the microwave coagulation treatment may cause certain oedema,which will disappear automatically within several days.