Lumbar vertebra surgery performed with a bilateral posterior quadratus lumborum block

The methods for perioperative pain management have remained limited for lumbar vertebrae surgery. Several type of quadratus lumborum (QL) block has been reported to be an effective analgesic in not only trunk surgery but also lower limbs surgery [1,2,3]. Of these QL block, a posterior QL block, injects local anesthetic at the posterior aspect of the QL, may be effective analgesic in lumbar vertebrae surgery because local anesthetic may flow to the transverse process and block posterior branched of lumbar spinal nerve (Fig.

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