Conclusion It is convenient and takes less time and the success rate is high when samples are collected though arterial blood gas needle.
结论采用动脉血气针采集动脉血气标本具有应用方便，穿刺所需时间短，穿刺成功率高等优点。
2
A centre vein puncture needle solves the problem that the existing puncture needle can not accurately decide that a blood vessel being penetrated into by the puncture needle is a vein or an arterial.