Modified Dynamic Needle Tip Positioning vs Conventional Long-axis In-plane in Radial Artery Cannulation

Conventionally, long-axis in-plane (LA-IP), short-axis out-of-plane (SA-OOP) and dynamic needle tip positioning based on SA-OOP views are commonly used method to image the target vessel during cannulation under US guidance. A modified SA-OOP that add developing line on the ultrasonic probe improve the success rate of cannula insertion into the radial artery on the first attempt.

Inclusion Criteria:The diagnostic criteria of coronary atherosclerotic heart disease according to the tenth version of international Classification of diseases(ICD-10);Requires invasive arterial blood pressure monitoring;New York Heart Association(NYHA) classification I, II or III;The American Society of Anesthesiologists (ASA) classification I, II or III;Patients older than 18 years and younger than 85 years (Adult);Patients signed the informed consent before the study.Exclusion Criteria:Patients with hemodynamically unstable (systolic blood pressure 60 or less);Patients with abnormal results of the modified Allen test;Patients with ulnar artery occlusion;Patients with coagulation disorders;Patients with skin abnormalities such as inflammation or hematoma at the cannulation site;Patients with raynaud disease and prevalent atherosclerosis;Patients with history of hand or wrist trauma or surgery;Patients who have undergone radial artery interventional therapy or radial artery cannulation within 3 months on the puncture side;Patients with BMI more than 40 kg/m2;Patients who have participated in other relevant clinical studies within 3 months.