IV Catheter Gauge에 따른 PSI 유용성 평가

Evaluation of PSI Effectiveness by IV Catheter Gauge : According to Viscosity of Contrast Media, Temperature, and Connection Tools

Purpose It aims to confirm the pressure difference between the cases of normal saline injection and contrast media injection using power injector, and to prevent the adverse events such as extravasation and so on, comparing PSI according to each condition like securing the vessel of gauge to meet the exam flow rate, maintenance of temperature, selection of connection tool, etc, and injecting the contrast media with the optimum conditions. Materials and methods 18G, 20G, 22G, and 24G catheter were inserted into 50 cm rubber, and connected with 3-way, MRVLS, 18G needle+ injection cap, directly, and with the coil of injector syringe. Injected the normal saline using power injector with the flow rates of 2.0, 2.5, 3.0, 4.0, and 5.0cc/sec, and inject contrast media, Ultravist 300, Ultravist 370, Iopamiro 300, Optiray320, and Visipaque 320, under the same conditions. And injected the contrast media with the temperature change 25℃ and 37℃. Results PSI during the contrast media injection with power injector was measrned twice to 5 times as high as the one during the normal saline injection. The lower the viscosity of contrast media, the higher the temperature, the thicker the catheter gauge, the lower the flow rate was, the lower PSI was measured. Conclusion 3-way, MRVLS, direct connection in the high flow exam is useful, while 3-way, direct connection is useful in the low flow exam and the cases that the vessel is weak. The vessel stability test for the injection solution should be performed accurately considering the difference of contrast media viscosity and standardized to use the contrast media in the heating cabinet since the viscosity may be varied approximately one-and-a half times according to the temperature of contrast media. Further objective experimental studies are required to anticipating the resistance of blood vessel by the patients’ diseases and IV site based on this study.