Do you know these knowledge about ultrasonography?

1. Is ultrasound examination harmful to the body?
The medium used in ultrasonic examination is ultrasonic waves, which have no ionizing radiation. The conduction in the human body utilizes the characteristics of sound waves, just like our speaking voice. Ultrasound examination is a very safe examination, so it is commonly used in obstetrics for fetal examination.

2. Is color ultrasound more advanced than B ultrasound?
The full name of color ultrasound is color Doppler ultrasound. B ultrasound is B-type two-dimensional ultrasound. Color ultrasound is based on B-type two-dimensional ultrasound with the addition of color Doppler inspection function. It can check the blood supply of organs and blood flow spectrum. Whether the shape and blood flow velocity are normal, so color Doppler ultrasound is more widely used in clinical practice.
3. What is the substance applied during the ultrasound examination?
During an ultrasound examination, the doctor will apply a layer of jelly-like substance on the examination site. It is called a coupling agent, which is a water-soluble liquid that isolates the air and allows the ultrasound probe to be in better contact with the skin. The conduction of sound waves ensures the inspection effect, without any poisonous effect, just wipe it dry with toilet paper after our inspection.
4. Why is fasting required for abdominal ultrasound?
Generally, when performing an abdominal ultrasound examination, the doctor will advise the patient to fast. This is because if you eat before the examination, the entire digestive system will become active, and some gas in the intestinal tract will interfere with the ultrasound examination, resulting in erroneous results. In addition, if the gallbladder shrinks or empties after eating, the gallbladder cannot be checked. Except in emergencies of course.