Abstract: Objective To investigate the application of early warning scoring of high pressure tolerance in venous vascular access in patients with enhanced CT. Methods From January to May, 2018, 7,660 patients receiving enhanced CT examination in our hospital were selected as the study subjects. The patients with single ID number were included as the control group, and those with double number as the observation group, with 3,830 cases in each group. Nurses in the control group followed the routine nursing operation specifications of intravenous treatment and those in the observation group were required to follow the early-warning scoring of high pressure tolerance in venous vascular access when embedding indwelling needles in addition to routine operation. The incidence of venous puncture difficulty, leakage, image quality and systemic adverse reactions of iodine contrast agent were compared between the two groups. Results There were significantly less cases of leakage in the observation group (Z=2.532, P=0.011). There was no statistical significance in terms of incidence of venous puncture difficulty, image quality, and systemic adverse reactions of iodine contrast agent (P>0.05). Conclusion Enhanced CT leakage rate can be effectively reduced by applying early warning scoring of high pressure tolerance in venous vascular access.

Key words: venous access, warning scoring of high pressure tolerance, enhanced CT, leak rate