Objective To evaluate the features of optical molecular imaging of bladder tumor cells labeled by tumor homing peptide fluorescent molecular probe, and to explore the theoretical foundation of optical molecular imaging for bladder cancer diagnosis.Methods After prepared the FITC-CSNRDARRC fluorescent molecular probe, laser scanning confocal microscope, immuno fluorescence and multispectral fluorescence in vivo optical molecular imaging system have been used to evaluate the binding sites, the affecting factors of binding rates, the specificity and the targets.BIU-87 bladder tumor cell line, BIU-87 bladder tumor cell line, 68 cases of paraffin bladder tumor tissue samples, 16 cases of paraffin glandular bladder inflammatory samples, 43 cases of paraffin renal clear cell carcinoma samples, 68 cases of paraffin gastric adenocarcinoma samples, 29 cases of urine exfoliated cells suspected bladder cancer and BIU-87 bladder cancer nude xenograft have been used in this study.Results The binding site of FITC-CSNRDARRC fluorescent molecular probe were at the nucleus of labeled bladder tumor cells.The binding rates were correlated linearly with the dose of probe and the grade of pathology.The in vitro and in vivo studies demonstrate that the probe has a binding specificity with bladder tumor. When the FITC-CSNRDARRC fluorescent molecular probe labeled tumor cells, bright green spots were observed under laser scanning confocal microscope.The bright green spots were more apparent after stained by DAPI again.The tissue samples and tumor cells in the urine can be successful labeled and identified by fluorescence microscope.Optical molecular imaging of in vivo xenograft tumor tissues showed fluorescent spots under EMCCD.Conclusions The labeled loci of single cell by FITC-CSNRDARRC probe have been identified. The spatial resolution of optical molecular image is related to sensitivity of CCD, and the optical molecular imaging cannot be imaged by the conventional endoscope camera.

【Objective】 To investigate the effect or endoscopic discectomy via interlaminar approach in the treatment of lumbar disc herniation under local or general anesthesia. 【Methods】 We selected 78 patients with lumbar disc herniation （L5-S1） who underwent endoscopic discectomy via interlaminar approach from January 2018 to February 2020. According to the anesthesia method， they were divided into local anesthesia group （40 patients） and general anesthesia group （38 patients）. Baseline data， complications， operation time， length of hospital stay， hospitalization expenses， preoperative and postoperative VAS scores were compared between the two groups to evaluate the difference in clinical outcomes. 【Results】 There was no significant difference between the two groups in gender （23/17 vs. 20/18）， age （38.45±13.59 vs 37.39±13.35） years， preoperative VAS score （7.05±1.32 vs. 6.95±1.47）， or other baseline data （P>0.05）. The operation was completed successfully in both groups， and the operation time （83.57±13.24 vs. 86.28±15.43） minutes did not statistically differ （P>0.05）. No complications such as cerebrospinal fluid leakage， nerve injury， or wound infection occurred. In the local anesthesia group， the VAS pain score at 1d， 1 month and 6 months after surgery was 3.05±1.34， 1.90±0.98 and 1.80±1.09， respectively， which were significantly lower than those before surgery （P<0.001）. The VAS pain scores of the general anesthesia group at the above three time points were 3.24±2.01， 2.03±1.20 and 1.59±1.31， respectively， which were also significantly lower than those before surgery （P<0.001）， but the difference was not statistically significant compared with that of the local anesthesia group at the same time point （P>0.05）. However， compared with the general anesthesia group， the length of hospital stay （2.93±0.92） d and the cost of hospitalization （29 397.97±1 398.09） yuan in the local anesthesia group were decreased by 25.8% and 11.7%， respectively， with statistical significance （P<0.05）. 【Conclusion】 Endoscopic discectomy through interlaminar approach under local or general anesthesia can achieve good clinical outcomes in the treatment of lumbar disc herniation （L5-S1）. Compared with general anesthesia， local anesthesia brings a lower overall cost and a shorter hospital stay.