Of 37 valves that were subjected to microbiological sample testing, 24.3% yielded microbes, predominantly coagulase-negative staphylococci.

• 在37例运用无针单向阀中进行样本的微生物学检测，24.；3%25病例产生微生物，主要是凝固酶阴性葡萄球菌。