And then pull out the needle from the same place to dura mater exterual canal to insert a vessel into the epidural for six pati...

• 结论硬脊膜穿破后再行硬膜外麻醉,作为一种补救措施,只要麻醉者掌握给药原则,并作必要的药械准备,完成原定手术是可行的。