7Loftus RW,Muffly MK,Koff MD,et al.Hand contamination of anesthesia providers is an important risk factor for intraoperative bacterial transmission.Anesth Analg,2011,11 (2):98-105.
10DU MOULIN G C, SAUBERMAN A J. The anesthesia machine and circle system are not likely to be source of bacterial con- tamination[ J ]. Anesthwsiology, 1977,47 (4) :353-358.
