在医院及化验室中,由于意外的血液污染导致的感染播散,逐渐为人们所重视。血液对环境的污染可发生在静脉穿刺,标本转送及化验室操作期间。使用常规针具采血,需把血液自注射器转注至试管中,这一操作可造成环境的污染。而用负压试管收集血标本,则不容易发生这种污染。负压试 In hospitals and laboratories, people are paying more attention to the spread of infections caused by unexpected blood contamination. Blood contamination of the environment can occur during venipuncture, specimen transfer, and laboratory operations. Using conventional needles to take blood, it is necessary to transfer the blood from the syringe into the test tube, which can cause environmental pollution. With negative pressure test tube to collect blood samples, it is not prone to such pollution. Negative pressure test