Bedside Ultrasound-guided Real-time Biliary Drainage by Emergency Surgeon Improving Prognosis in the Frail and High Risk Elderly Patients With Severe Acute Suppurative Infection of Biliary Tract: A Randomised Controlled Trial

After admission, vital signs will be collected by nurses and scored according to the Canadian health and aging clinical frailty scale 3 . Emergency surgeons will evaluate patients' airway, respiratory and circulatory status and intervene according to their condition. For patients with stable vital signs, CT will be performed first. Patients with untable vital signs and hemodynamics, bedside ultrasound will be performed by an emergency surgeon while aggressive rescue measures and further CT scans will be performed if the patient's condition permitted.The patients in the experimental group will be diagnosed by emergency surgeon using Philips CX50 portable ultrasound and treated by ultrasound-guided puncture and drainage at the first time, these included ultrasound-guided percutaneous transhepatic gallbladder drainage (PTGD) and percutaneous transhepatic choledochal drainage (PTCD) .In the control group, the patients will be scheduled for puncture and drainage treatment in the traditional ultrasound department at the same time of stabilizing vital signs.Then the two groups of patients will be followed up, through CT results to understand the accuracy of emergency bedside ultrasound.