1Heeg P. Reprocessing endoscopes: national recommendations with a special emphasis on cleaning-the German perspective ~J3. J klosp Infect,2004,56(2) :23-26.
2Karadenz YM,Kilic D,Kara-Altan S,et al. Evaluation of the role of ultrasound machines as a source of nosocomial and cross-infection[J]. Invest Radiol,2001,36(9) :554-558.
3Lewis T,Patel V, Ismail A,et al. Sterilisation, disinfection and cleaning of theatre equipment~ do we need to extend the Spaulding classification[J]. J Hosp Infect, 2009,72 (4) : 361- 363.
