Conacher I D, Kokri M
Br J Anaesth. 1987 Feb;59(2):155-61. doi: 10.1093/bja/59.2.155.
Five patients who underwent thoracic operations had an extradural catheter placed in the paravertebral space. X-ray contrast was injected through the catheters. In those who had detectable analgesia, contrast spread extensively, laterally, along one intercostal space, and up and down the paravertebral spaces. In one patient, contrast appears to have entered the extradural space and, in another who had no detectable analgesia, the contrast was probably dispersed intrapleurally. The significance of these findings is discussed.
五名接受胸科手术的患者在椎旁间隙放置了硬膜外导管。通过导管注入X射线造影剂。在那些有可检测到的镇痛效果的患者中，造影剂广泛地向外侧沿着一个肋间间隙扩散，并在椎旁间隙上下扩散。在一名患者中，造影剂似乎进入了硬膜外间隙，而在另一名没有可检测到的镇痛效果的患者中，造影剂可能在胸膜腔内扩散。讨论了这些发现的意义。
