1[1]Bagnally Reeb H.Diagnosis of central venous access device occlusion[J].Journal of Intravenous Nursing,1998,21(5S):115-121.
2[2]Lawson M,Bottino JC,Hurtubise MR,et al.The use of urokinase to restore the patency of occluded central venous catheters[J].American Journal of Intravenous,1982,5:29-32.
