What is the frequency range of surgical diathermy?

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Surgical diathermy involves current frequencies in the range of 400 KHz to 10 MHz. Currents up to 500 MA may then be safely passed through the patient.

What is working principle of surgical diathermy?

The surgical diathermy performs its function by the application of high density radio frequency current which can be used to cut or coagulate tissue. Its improper use can result in electrical burns and even electrocution.

What is the frequency range of the sound used for ultrasound diathermy?

Ultrasound diathermy is a deep heating modality that uses high-frequency acoustic vibrations. The frequencies employed are above the human audible spectrum (ie, higher than 17 kHz), typically in the range of 0.8-1.0 MHz.

What are the different methods of surgical diathermy?

There are three main types of diathermy: shortwave, microwave, and ultrasound.

Why higher frequencies are used for diathermy?

Diathermy is produced by high-frequency, 13.56 MHz, alternating electrical current that generates heat because of the impedance (resistance) of the tissue through which it is passed. The heat created by the diathermy energy coagulates tissues.

What is the difference between cut and COAG?

Cut/Coag Most wet field electrosurgical systems operate in two modes: “Cut” causes a small area of tissue to be vaporized, and “Coag” causes the tissue to “dry” (in the sense of bleeding being stopped).

What is the frequency range of the sound used for ultrasound diathermy Mcq?

0.7 – 3.3 MHz
5. What is the frequency range of the sound used for ultrasound diathermy? Explanation: The ultrasound treatment can penetrate up to 2 – 5 cm deep within the skin to relieve pain. The frequency of 0.7 – 3.3 MHz is used.

What is the difference between short wave diathermy and microwave diathermy?

Microwave diathermy, seldom used in the United States, uses high-frequency electromagnetic waves (2450 MHz; wavelength of 11 m) to heat tissues. Short- wave diathermy uses high-frequency electromagnetic waves that are similar to radio waves (10–100 MHz) to heat deep tissues.

What is the frequency of short wave diathermy?

Short wave diathermy uses a frequency around 27 MHz, corresponding to a wavelength of about 12 m.

When do you use monopolar vs bipolar?

Though monopolar surgery is more commonly used due to its effectiveness, bipolar surgery is preferred with patients who have life-sustaining devices in their body that might fail if a current is passed through.

What is the difference between bipolar and monopolar diathermy?

In monopolar action, the electrical current oscillates between the surgeon’s electrode, through the patient’s body, until it meets the ‘grounding plate’ (typically positioned underneath the patient’s leg) to complete the circuit. In bipolar diathermy, the two electrodes are found on the instrument itself.