Before successful puncture in the superficial cervical veins, heparin cap was well connected, scalp vein set was connected, the thread led in and the air was exhausted. After successful puncture, 3M transparent dressing was use to fasten.

• 颈外静脉穿刺前要连接好肝素帽,连接头皮针与引线排气,成功穿刺后用3M透明敷料固定。