Ultrasound examination has the following characteristics: First, ultrasound examination uses ultrasound to sweep the human body, so there is no radiation to the human body, and it is a relatively safe examination method, and most of the population can be examined accordingly with ultrasound. Second, ultrasound examination is relatively simple and convenient, and because ultrasound instruments are relatively dexterous, bedside examination can be performed on critically ill patients, so it is very much used in emergency medicine. Third, ultrasound can choose the appropriate probe according to the different parts of the patient’s examination. One machine can be equipped with multiple inspection probes, so many hospitals can use one machine to scan most of the organs of the patient’s body accordingly.