The Clinical Effect Of Percutaneous Endoscopic Interlaminar Discectomy(Delta System)in The Treatment Of Single-segment Lumbar Spinal Stenosis

Objective Evaluate the safety and efficacy of percutaneous endoscopic interlaminar discectomy(delta system)in the treatment of single-segment lumbar spinal stenosis.Methods Investigate and analyze the patients with single-segment lumbar spinal stenosis treated by Chi Feng city hospital from December 2017 to June 2019.According to the different operation methods,the patients were divided into experimental group(treated by percutaneous endoscopic interlaminar discectomy(Delta system))and control group(treated by posterior lumbar decompression and internal fixation,PLIF),with a total number of 60 cases.Experimental group:30 cases,Males accounted for 53.33% and females 46.67%,aging from 45 to 65 years,average age were(56,±5)years,position of spinal canal stenosis L4/L5 accounted for 20% and L5/S1 was 80%.Control group:30 cases,Males accounted for 43.33%and females 56.67%;aging from 48 to 72,average age were(58,±4)years;spinal canal stenosis position L4/L5 accounted for 30% and L5/S1 was 70%.The duration time of operation、length of the incision and intraoperative blood loss were recorded and the visual analogue score(VAS)and Oswestry dysfunction index(ODI)at 1 day before preoperation and 3 days,3 months,6 months after postoperation were recorded.And the modified Macnab criteria was used to evaluate the effectiveness 6 months after postoperation.Results All patients finished the operation successfully and accepted post-operative follow-up.The length of incision,the amount of bleeding and the duration of operation were statistically significant(P<0.05).There was no significant difference in low back pain and leg pain VAS scores and ODI index of dysfunction between the two groups at 1 day before preoperation and3 months,6 months after postoperation(P>0.05),there was statistically significant difference in3 days after operation between the two groups(P<0.05);The VAS score and ODI index of leg pain at any time points were statistically significant in the two groups(P<0.05).;The excellent and good rate of the experimental group at 6 months after postoperation was found to be higher than that of the control group by comparison,but the difference was not statisticallysignificant(P>0.05).Conclusion Percutaneous endoscopic interlaminar discectomy(Delta system)and PLIF are equally effective in the treatment of single segment lumbar spinal stenosis,but the Delta system has smaller incisions and less intraoperative bleeding,it is therefore one of the safe and effective surgical methods.