Result:In interventional group improved posture hadn't increase operation difficulty or enlongate duration, but reduce time duration of cervical hyper extension.
结果：干预组并不增加手术难度及手术时间，但可显著缩短术中头颈部过伸位的时间；
Result:In interventional group improved posture hadn't increase operation difficulty or enlongate duration, but reduce time duration of cervical hyper extension.
结果：干预组并不增加手术难度及手术时间，但可显著缩短术中头颈部过伸位的时间；
应用推荐