Is ultrasonic therapy harmful to the body?

With the current development of medical technology, there are already many equipment products used in medical treatments, which play many auxiliary therapeutic roles, and there are some devices that can help in many areas. Ultrasonic therapy device is such a device. Currently, ultrasonic therapy device is used in traditional Chinese medicine, surgery, internal medicine, orthopedics, etc., using the unique properties of ultrasound to achieve therapeutic effects. Now let’s talk about whether ultrasonic therapy device is harmful to the body.

Is ultrasonic therapy harmful to the body?

1. The working principle of ultrasound is to utilize the physical principle of sound waves. The frequency > 20000Hz is ultrasound, and the medical ultrasound frequency is 1~15MHz. The essence of ultrasound is sound waves, that is, mechanical waves, so it does not have the hazards of ionizing radiation. So far, ultrasound examinations have not been found to cause harm to the human body.

2. The biological effect of ultrasound on the human body is related to the ultrasound power and irradiation time. Low-power ultrasound has limited irradiation time and will not produce obvious biological effects. Although high-intensity ultrasound (>5W/cm2) is used to crush stones and destroy tumor tissue and has a strong mechanical power effect, diagnostic ultrasound only uses ultrasound as a signal and requires extremely small power.

Therefore, diagnostic ultrasound has been considered very safe for many years. Under the internationally prescribed safety threshold conditions, no obvious side effects were found, including adverse effects on the embryo and early pregnancy fetus.

3. Although ultrasound examination is a very safe imaging examination method, caution should still be adopted in daily ultrasound diagnosis. That is, use the minimum output power, reduce the examination time, avoid long-term irradiation at fixed parts (especially the eyes and early embryos), and minimize certain side effects that may be caused by ultrasound irradiation.

Ultrasonic waves have the following characteristics:

1) Ultrasonic waves can be effectively transmitted in media such as gas, liquid, solid, and solid solution.

2) Ultrasound can transmit very strong energy.

3) Ultrasonic waves will produce reflection, interference, superposition and resonance phenomena.

4) When ultrasonic waves propagate in liquid media, they can produce strong impact and cavitation phenomena on the interface.