Method 100 cases in observation group receive artery sampling by preset artery blood collector.100 cases in control group receive artery sampling by disposable syringe.

• 方法观察组100例用预设型动脉采血器采动脉血,对照组100例用一次性注射器采动脉血,观察两组标本合格率、采血时患者疼痛程度及采血后穿刺处压迫时间。