Title: Lumbar punctures and ultrasound
题目：腰穿和超声
Author作者: Jennifer Guyther

Infant lumbar puncture is often difficult and may require repeated attempts. The traditional body positioning is lateral decubitus. Previous studies have examined the safety of having the patient in a sitting position, and neonatal studies have suggested that the subarachnoid space increases in size as the patient is moved to the seated position.
婴儿腰椎穿刺往往是困难的，可能需要多次尝试。传统的身体姿势是侧卧。以往的研究已经检查了让病人坐着安全性； 同时新生儿研究表明，新生儿蛛网膜下腔随病人移动到坐在而增加。
A study by Lo et al published last month looked to see if the same held true in infants.
 

上个月Lo等人发表了一项研究，看是否这一现象在婴儿中也是成立的。
50 healthy infants less then 4 months old had the subarachnoid space measured by ultrasound between L3-L4 in 3 positions: lateral decubitus, 45 degree tilt and sitting upright.
这项研究对50个健康的小于4个月的婴儿在L3-L4之间的蛛网膜下腔的大小用超声在3个不同的位置：侧卧，45度倾斜，正坐位进行了测量。
This study found that the size of the subarachnoid space did not differ significantly between the 3 positions.
这项研究发现，蛛网膜下腔的大小在3个位置之间没有显着不同。
Authors postulated that a reason for increase sitting LP success rate that had been reported in anestesia literature with tilt position could be due to other factors such as increased CSF pressure, intraspinous space widening or improved landmark identification.
作者推测，麻醉杂志报到的坐位可增加腰穿成功率，可能是由于其他因素，如脑脊液压力增高，脊突间间隙增宽或表面标记更明显。
References参考文献：
Sitting or Tilt Position for Infant Lumbar Puncture Does Not Increase Ultrasound Measurements of Lumbar Subarachnoid Space Width. PediatrEmer Care 2013;29: 588-591.