Primary outcome: first-attempt success rate of radial artery cannulation and catheter placement Secondary outcomes: number of attempt of radial artery cannulation, overall procedure time, overall success rate(success rate of puncture and catheter placement within 5 minutes), PSV, EDV, RI, TAmean, systolic and diastolic blood pressure before and after puncture, heart rate, patient comfort, pain score, incidence of local hematoma, thrombosis, and spasm.
The aim of this study is to conduct a prospective, single-center randomized controlled study to investigate the effect of mild midazolam combined with sufentanil on radial artery cannulation in novice operators.