Diathermy | 合法醫療器材資訊網

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Diathermy is the use of high frequency alternate polarity radio-wave electrical current to cut or coagulate tissue during surgery. It allows for precise incisions to be made with limited blood loss and is now used in nearly all surgical disciplines.

Diathermy uses very high frequencies (around 0.5-3 MHz) of electrical current. This allows diathermy to avoid the frequencies used by body systems generating electrical current, such as skeletal muscle and cardiac tissue, allowing body physiology to be broadly unaffected during its use.

The radio-frequencies generated by the diathermy heat the tissue to allow for cutting and coagulation, by creating intracellular oscillation of molecules within the cells. Depending on the temperature reached, different results occur: at 60oc, cell death occurs (fulgurate), between 60-99oc, dehydration occurs and the tissues coagulate, and at around 100 oc, the tissues vaporise (cutting).

Due to the s...