Abstract: Objective To compare the clinical efficacy of percutaneous transforaminal endos-copic discectomy(PTED) and Quadrant minimally invasive system in treatment of the single segment of lumbar disc herniation(LDH). In order to provide a safe and effective surgical method for the treatment of single segment lumbar disc herniation.Methods 74 cases of patients with single lumbar disc herniation treated were retrospectively reviewed, The patients were divided into two groups according to the operation methods.45 patients were treated by PTED(PTED group) and 29 patients were treated by Quadrant minimally invasive system(Quadrant group).Compare the operative time, blood loss,incision length, the time of bed rest，length of hospital stay and intraoperative complications between the two groups. Visual analogue scale(VAS), Oswestry disability index(ODI), Japanese orthopedic Association (JOA) and modified MacNab criteria were used for surgical efficacy evaluation.Result The operation time was （79.5±9.5）min，blood loss was（18.6±3.4）ml, incision length was（0.8±0.1）cm,the time of bed rest was（1.5±0.7）d，length of hospital stay was （5.3±1.0）d,the VAS score in three days after operation was（2.9±0.6） ，which were shorter or lower in PTED group compared with the Quadrant group[（70.3±8.7）min,（44.9±4.6）ml,（4.5±0.3）cm,（3.4±0.6）d,（8.0±0.8）](all P<0.05).The operation time were shorter in Quadrant group（70.3±8.7） compared with the PTED group（79.5±9.5）(P<0.05); The postoperative ODI、JOA and MacNab criteria excellent rate had no significant difference between the two groups(P>0.05).Conclusion Both PTED and Quadrant minimally invasive system are effective in the treatment the single segment of LDH.Comparatively,PTED were less bleeding,short incision length, rapid recovery. It will be a good choice for the treatment of single segment lumbar disc herniation.

Key words: percutaneous transforaminal endoscopic discectomy, Quadrant minimally invasive system, lumbar disc herniation