1Verghess S,Padmaja P,Sudha P,et al.Central catheter related infections.J Commun Dis.1993,31(1):1~4.
2Nahum E,Levy I,Katz J,et al.Efficacy of subcutaneous tunneling for prevention of baterial colonization of femoral central venous catheters in critically ill children.Pediatr Infect Dis J.2002,21(11):1000~1004.