Abstract: Objective  To observe the deep venous stenosis and occlusion caused by different indwelling time of the internal jugular venous catheters.Methods  A total of 48 patients with vascular access problems were enrolled. According to the different indwelling time of temporary catheter in internal jugular vein, the patients were divided into three groups: group one (less than onemonth), group two(13 months) and group three (more than 3 months). All patients were examined by CTA to observe the condition of deep veins and solve the problems of vascular access.Results  The incidence rate of deep venous stenosis or occlusion in three groups were 75.0%, 87.5% and 100%, respectively. The blood vessels involved the internal jugular vein, the cephalic vein and the superior vena cava. And some patients cannot reestablish the vascular access.Conclusion  When the catheter indwelling is more than one month, the vascular stenosis rate is very high. The indwelling catheter should be reduced and the indwelling time should be minimized.

Key words: catheterization, , central , venous; , deep venous；renal , dialysis