Thoracolecular tube abdominal tube why do B ultrasound?

Although physical examinations such as sight, touch, tapping, and listening can help determine the condition of the chest and ascites, B-ultrasound can more accurately help the operator understand the amount of chest and ascites, the distance from the abdominal wall, and whether there is fiber wrapping, so as to be aware of and reduce complications. In order to reduce the risk, the majority of hospitals need to perform routine B-ultrasound positioning when doing chest puncture and abdominal puncture