Ultrasound is an auxiliary department. Generally, if the clinic thinks it is necessary, it needs to go to the bedside. However, bedside examination is really time-consuming, laborious and ineffective, so it is best to communicate with the clinic. If it is not necessary, it is better to send it to the hospital. When patients go to the department for examination, after all, it is impossible to push a good machine to the bedside.
If you are strong enough, you can list the disease types and critical conditions before going to the bedside, but it is difficult to agree in general clinical practice.