2017 年 43 巻 1 号 p. 45-52
Hypertensive emergency is a situation in which uncontrolled hypertension is associated with acute end-organ damage. Nicardipine hydrochloride is a calcium channel blocker indicated for the treatment of hypertensive emergencies. However, nicardipine infusion-related phlebitis is a common and significant problem in clinical practice. The aim of this study was to survey the incidence of nicardipine infusion-related phlebitis and to identify associated risk factors for phlebitis. We conducted a retrospective observational study at Fukuoka Tokushukai medical center. A total of 79 patients who received precision continuous infusion of nicardipine were enrolled in this study. Nicardipine infusion-related phlebitis occurred in 34 (25.7％) of 132 peripheral intravenous catheters. On multivariate logistic analysis, “the dosing period over 24 hours” and “no co-infusion of saline” were significantly associated with an increased risk of nicardipine infusionrelated phlebitis. The odds ratio (OR) and 95％ confidence interval (95％ CI) for the occurrence of phlebitis with respect to “the dosing period over 24 hours” and “no co-infusion of saline” were 5.04 (2.012 - 12.657) and 3.36 (1.190 - 9.514), respectively. In addition, the optimal cut-off level of the dilution rate of saline was determined to be 4.23 times (sensitivity 73.5％, specificity 58.8％) based on receiver operating characteristic (ROC) analysis for predicting the occurrence of phlebitis. To minimize the risk of peripheral phlebitis, we propose that medical professionals should consider changing the infusion site every 24 hours at least and co-infusing saline diluted more than 4-5 times.