Abstract: Objective To investigate the effect of unilateral dual-channel endoscopy on the recovery of lumbar spine function in patients with free lumbar disc herniation.Methods A total of 93 patients with free lumbar disc herniation who were admitted to the hospital from October  2020 to September  2021 were selected as the research objects.All patients received unilateral dualchannel endoscopic treatment.Surgery-related indicators of 93 patients(intraoperative blood loss,operative time,and postoperative bedtime) were counted.The modified MacNab efficacy evaluation standard was used to evaluate the efficacy 12 months after the operation.Visual analogue scale(VAS) and Oswestry dysfunction index(ODI) were compared before operation,1 month after operation,and 12 months after operation.The incidence of complications within 3 months after the operation and the recurrence rate within 12 months after the operation were recorded.Results The operation time,intraoperative blood loss,and postoperative bed rest time of 93 patients were(82.35±10.61)min,(48.47±6.59)ml,and (8.65±1.72)d,respectively.At 12 months after operation,the excellent and good rate of 93 patients was 92.47%.At 12 months after operation,the VAS score and ODI of the patients were lower than those at 1 month after operation and before operation(P<0.05).One month after operation,the VAS score and ODI of the patients were lower than those before operation(P<0.05).At 3 months after surgery,the overall complication rate among 93 patients was 6.45%.At 12 months after surgery,3 of the 93 patients had recurrence,and the recurrence rate was 3.23%.Conclusion The unilateral dual-channel endoscopy technique is effective in the treatment of free-type lumbar disc herniation,which can relieve the patient’s low back and leg pain,restore lumbar spine function.

Key words: unilateral dual-channel endoscopy, Free lumbar disc herniation, lumbar spine function, safety