177
Participants
Start Date
April 1, 2020
Primary Completion Date
March 1, 2021
Study Completion Date
March 1, 2021
ultrasonic guidance
Standard process for blood collection using Ultrasonic Guided puncture
2nd Affiliated Hospital, School of Medicine, Zhejiang University, China, Zhejiang
Second Affiliated Hospital, School of Medicine, Zhejiang University
OTHER