Fig. 1

X-ray images of PICC before(a) and after arm movements(b). 1a/1b, 13-year boy, right basilic vein insertion, 4.0 Fr catheter, the tip was in the right jugular vein before arm movements. 2a/2b, 6-year girl, right basilic vein insertion, 4.0 Fr catheter, the tip was in the left subclavian vein before arm movements. 3a/3b, 5-year boy, right cephalic vein insertion, 4.0 Fr catheter, the tip was in the left subclavian vein before arm movements. 4a/4b, 5-month boy, left axillary vein insertion, 1.9Fr catheter, the tip was in the left jugular vein before arm movements. 5a/5b, 7-year boy, right cephalic vein insertion, 3.0 Fr catheter, the tip was in the right jugular vein before arm movements. 6a/6b, 20-month boy, right basilic vein insertion, 3.0 Fr catheter, the tip was in the left brachiocephalic vein before arm movements. Tips of all PICCs were in the superior vena cava after arm movements