Zhefeng Q, Luo C, Zhang L, et al. Application of optimized ultrasonic localization system for radial artery puncture by intern doctors: A randomized trial[J]. Med Sci Monit, 2019, 25: 1566‐1571.
Confirmation of initial blood return and needle tip visualization in the target vein on the ultrasound screen (arrowhead).
The probe is advanced forward slightly until the needle tip disappears from the screen, and the puncture angle is reduced slightly.
The needle tip is advanced forward slightly until it appears on the screen again (arrowhead).
Nam K, Jeon Y, Yoon S, et al. Ultrasound‐guided radial artery cannulation using dynamic needle tip positioning versus conventional long‐axis in‐plane techniques in cardiac surgery patients: A randomized, controlled trial[J]. Minerva Anestesiol, 2020, 86 (1): 30‐37
Wang J, Lai Z, Weng X, et al. Modified long‐axis in‐plane ultra‐ sound technique versus conventional palpation technique for ra‐ dial arterial cannulation: A prospective randomized controlled trial[J/OL]. Medicine (Baltimore), 2020, 99(2): e18747.