Management of Perioperative Pain Using Erector Spinae Plane Block in Open Microscopic Lumbar Surgery

"After consent was obtained, patients will be randomised into control group and an intervention group. For patients randomized into the interventional group, bilateral erector spinae plane block will be performed under general anaesthesia in prone position before the operation. An experienced anaesthetist performs this under ultrasound guidance (using curvilinear probe) in a sterile method.~After identifying L3 transverse process, 21G Stimuplex needle will be inserted via in-plane method. Once needle placement is confirmed and aspiration is negative, 20ml of ropivacaine 0.375% with adrenaline 1:200,000 dilution will be given on each side."

Pre incision of 0.375% ropivacaine 10ml local infiltration will be given to control group