Abstract:Abstract Objective:To analyze and compare the clinical effect of once-hole dual approach spine endoscope (OSE) technology and unilateral biportal endoscopy(UBE) technology in the treatment of lumbar spinal stenosis. Methods: The clinical data of 148 patients with lumbar spinal stenosis who underwent OSE technology and UBE technology from January 2022 to December 2022 in multiple clinical research centers(Sixth Medical Center of PLA General Hospital/Department of Sports Medicine, First Affiliated Hospital of Kunming Medical University/Department of Spinal Surgery, Qujing Second People's Hospita) were retrospectively analyzed. There were 73 patients in OSE group, 45 males and 34 females, aged 62.75±6.06 years. There were 75 cases in UBE group, including 49 males and 31 females, aged 61.28±6.37 years old. The operation time, intraoperative radiation times,the amount of blood loss, incision length, the duration of hospital stay, and surgical complications of the two groups were recorded. All patients were followed up for 12 months.The visual analogue scale (VAS) of lumbar and leg pain was compared between the two groups before operation and at each time point (1month, 3 months, 6 months, 12 months) after operation. VAS score, oswestry disability index (ODI), preoperative and postoperative follow-up data (disc height, the cross-sectional area of dural sac, facet joint retention rate); The modified MacNab standard was used to evaluate the curative effect of the last follow-up operation in the two groups. Results: 148 patients successfully completed the operation and follow-up, OSE group and UBE group had no significant differences in operation time, intraoperative radiation times, intraoperative amount of blood loss, the duration of hospital stay, surgical complications (P>0.05). Compared with UBE group, the incision length of OSE group was smaller, and the difference was statistically significant (P<0.05). The lumbar pain scores and ODI values at 1 month, 3 months, 6 months and 12 months after surgery were significantly improved in both groups compared with those before surgery (P<0.05). Compared with UBE group,lumbar pain scores and ODI values in OSE group at 1 month and 3 months after surgery were significantly improved, and the difference was statistically significant (P<0.05). There was no significant difference in lumbar pain scores and ODI values between the two groups at 6 and 12 months after surgery (P>0.05). There were no significant differences in leg pain scores between the two groups at each time point before and after surgery (P>0.05). The cross-sectional area of dural sac at the operative level was significantly increased between the two groups, with statistical significance (P<0.05),while there was no statistical significance between the two groups (P>0.05). Compared with the approach side, the contralateral facet joint retention rate was higher, the difference was statistically significant (P<0.05), but there was no statistically significant difference between the two groups (P>0.05). There was no significant difference in the disc height between the two groups at all time points after surgery (P>0.05). There was no significant difference in the excellent and good rate between the two groups 12 months after operation (P>0.05). Surgical complications: One case suffered dural sac tear in each of the two groups, and the difference was not statistically significant (P>0.05).Conclusion: OSE technique is compatible with the advantages of open surgery and minimally invasive surgery, which is a safe and effective method for lumbar spinal stenosis.