spinal needle

基本解釋

A further complicating factor is variability in the length of epidural needles, which can vary the amount of spinal needle protruding beyond the end of the epidural needle.
另一較復(fù)雜的因素是硬膜外針長(zhǎng)度的變異，此種變異可影響到腰麻針突出硬膜外針的長(zhǎng)度。
The utility model relates to an improved double-tube puncture needle for spinal analgesia and epidural anesthesia, which belongs to the technical field of a medium inputting tube for medical use.
本實(shí)用新型是一種改進(jìn)的脊麻――硬膜外麻醉雙管穿刺針，屬于醫(yī)療用介質(zhì)輸入導(dǎo)管技術(shù)領(lǐng)域。
ip.com
Because they do spinal with only a 25G needle, which is so slim that even puncture of vessel doesn't result in much bleeding.
硬膜外針很粗加上置管的損傷，出血較多且很難避免，因此不作硬膜外是有道理的。