What are the hazards of ultrasound to the human body

Technology is developing very rapidly now, and medical facilities are also a huge leap compared to the past. However, safety risks have continued to emerge. Low-dose ultrasound is a potential carcinogenic and teratogenic factor, and different frequencies and sound intensities have certain hazards to different individuals. Ultrasonic cleaning technology is now widely used. This type of companies basically exists in the fields of optics, hardware, auto parts, molds, plastics, medicine, electronics, etc. What are the hazards of ultrasound to the human body? Let’s find out.

1. Low-dose ultrasound is a potential carcinogenic and teratogenic factor, and different frequencies and sound intensities have certain hazards to different individuals.

2. Because ultrasound has a strong penetrating ability for both solids and liquids, when the energy is high, it can cause the particles of the material to vibrate at a high frequency, and part of the energy can also be converted into heat energy, causing the local temperature to increase. When high-intensity pulsed ultrasonic waves propagate in a liquid containing micron-sized bubbles, they can cause the bubbles to shrink, expand, and even explode violently.

3. 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.

4. When ultrasound propagates in the body, it causes changes in the body's functions and structures through the interaction between tissues, which is called the biological effect of ultrasound. The mechanism of producing biological effects is thermal effect and cavitation effect.

5. The so-called thermal effect refers to the process in which part of the energy of ultrasound is absorbed by biological tissue and converted into heat energy, which increases the temperature of the tissue; the cavitation effect refers to the process in which ultrasound interacts with the gas nuclei or microbubbles in the tissue, causing them to suddenly burst, generate huge instantaneous pressure, and change the internal structure of the tissue.

The above describes the hazards of ultrasound to the human body. Sometimes exposure to ultrasound is unavoidable, and medical use is the most widespread. Pregnant women should not operate things like cleaning machines as they are very harmful. In necessary circumstances, ultrasound can be chosen for treatment or examination. Do not stay in an ultrasonic environment for a long time.