5Chathas K, Paton B. Sick infants with a percutaneous central venous catheter quality assurance Program[J]. Perinat Neonat Nurs, 1997,10(4) : 72.
6Forauer A R, Alonzo M. Change in peripherally inserted central catheter tip position with abduction and adduction of the upper extremity[J]. J Vasc Interv Radiol, 2000,11 (10) : 1315- 1318.