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Table 1 Distribution of membrane vertebral ligament and the incidence of abnormal catheterization (%)

From: An anatomical study of lumbar epidural catheterization

Vertebral Segment Occurrence rate of dorsal meningovertebral ligaments Incidence of catheter exit through the foramen Incidence of catheter curled into a circle Venous plexus puncture rate
L1 22 %(11) 0 0 0
L1-L2 32 %(16) 0 0 0
L2 40 %(20) 0 0 0
L2-L3 38 %(19) 2 %(1) 2 %(1) 2 %(1)
L3 34 %(17) 0 0 4 %(2)
L3-L4 44 %(22) 2 %(1) 4 %(2) 4 %(2)
L4 46 %(23) 0 0 0
L4-5 62 %(31) 0 0 0
L5 30 %(15) 0 0 0
L5-S1 98 %(49) 0 0 0
  1. Values given are percentage (number)