Objective To compare the short‐term clinical effects of single segment and two segments of Dynesys dynamic in‐ternal fixation system for treating lumbar degenerative disease .Methods 40 cases of degenerative lumbar disease treated by the Dynesys dynamic fixation system combined with posterior approach decompression from 2009 July to March 2012 were selected and performed the evaluation on the clinical effects by the waist and leg pain visual analogue scale (VAS) ,the Oswestry disability index (ODI) and the orthopaedic spinal association of North America (NASS) index .The imaging method was used to observe the mobili‐ty of operative segment and proximal adjacent segment and the degenerative change of intervertebral height .Results All of the 40 cases were followed up .The VAS score and ODI score at postoperative 3 months and last follow‐up were significantly decreased when compared with the pre‐operative scores (P<0 .05);there was no statistically significant differences in the VAS score and ODI score at 3 months and last follow‐up between the single segment group and the 2‐segment group (P> 0 .05) .The NASS index showed no statistically significant difference in the postoperative effect satisfaction between the two groups (P>0 .05);there was no statistically significant difference in the variation of the intervertebral height between before operation and at the last follow‐up (P>0 .05) .There was statistically significant difference in the motility of proximal adjacent segment at the last follow‐up between the two groups (P<0 .05);but comparing the motility of proximal adjacent segment between the last follow‐up and pre‐operation , only the single segment group showed statistically significant difference (P< 0 .05) .Conclusion The Dynesys dynamic fixation system combined with posterior approach decompression operation has good clinical effect in the treatment of lumbar degenerative disease .Meanwhile ,the single segment method has more significant effect on the motility of proximal adjacent segment than the double segments method .

【Objective】 To explore the clinical value of laparoscopic radical cystectomy based on fascia anatomy for bladder cancer treatment. 【Methods】 The clinical data of 51 patients with bladder cancer who underwent 3D laparoscopic radical cystectomy during Jan.2015 and Jun.2022 were retrospectively analyzed.The surgery was performed based on membrane anatomy technology along four longitudinal and two transverse planes to complete the radical cystectomy.The pelvic plexus was preserved for patients with normal preoperative sexual function. 【Results】 All surgeries were completed without conversion to open operation.The mean operation time was (502.52±108.99) min, mean intraoperative blood loss was (275.96±155.18) mL, mean postoperative drainage time was (4.14±2.41) d, and the mean postoperative hospital stay was (16.37±4.85) d.The mean number of lymph nodes removed was (17.98±11.48).The mean postoperative follow-up was (30.27 ±19.39) months.At the last follow-up, no Clavien ≥grade 3 complications were observed.The estimated overall survival (OS), tumor-specific survival (TSS), and recurrence-free survival (RFS) were 82.4%, 92.2%, and 88.2%, respectively.The lymph node positive patients had shorter OS and RFS (60.0%, 60.0%) than the lymph node negative patients (84.8%, 91.3%).Among the 19 male patients who underwent radical cystectomy with pre-exposure and preservation of pelvic plexus, daytime and nocturnal continence rate were 83.3% and 72.2%, respectively, and 17 patients recovered potency within 6 months postoperatively. 【Conclusion】 Laparoscopic radical cystectomy based on fascia anatomy is safe and effective in laparoscopic radical cystectomy, with standardized surgical procedure, satisfactory oncological outcomes, little hemorrhage, few complications and fast recovery.