Efficacy of 2 940 nm Er∶YAG laser combined with electronic injection of collagen in treatment of striae gravidarum / 中华医学美学美容杂志

Objective:To assess the efficacy and security of 2 940 nm Er∶YAG laser combined with electronic injection of collagen in treatment of striae gravidarum.Methods:The symmetrical spots on both sides of abdomen of 21 subjects with striae gravidarum were divided into treatment and control groups by simple randomization method in the Department of Burn and Plastic Surgery, 903 Hospital from November 2017 to May 2019. The treatment group were treated with 2 940 nm Er∶YAG laser combined with electronic injection of collagen every 2 months for 3 sessions, and control group were received 2 940 nm Er∶YAG laser combined with electronic injection of physiological saline. The total effective rate, satisfaction, striae width, histopathology, and the adverse reaction were evaluated at 6 months after treatment.Results:A total of 19 subjects completed the whole trail. The clinical effective rate of the treatment group was 89.47% and the control group was 68.42%. In the treatment group, 11 cases were satisfied with and 6 cases were very satisfied with treatment outcome. In the treatment group, 8 cases were satisfied with and 3 cases were very satisfied with treatment outcome. The difference of total effective rate and satisfaction was statistically significant ( χ2 was 3.91 and 5.54, P was 0.045 and 0.019). The maximum width decreased by (1.53±0.97) mm on treatment side, and (1.37±1.01) mm on control side. The difference of striae width was statistically significant. No adverse effect was observed on both sides. Conclusions:The combination of the 2 940 nm Er∶YAG laser with electronic injection of collagen for treatment of striae gravidarum is a safe and effective approach for improving of striae gravidarum.

Clinical research on effect of microendoscopic discectomy through posterior approach in old patients with multilevel lumber spinal stenosis and its influence factors / 重庆医学

Objective To explore the clinical effect of microendoscopic discectomy through posterior approach in old patients with multilevel lumber spinal stenosis and analyze the influence factors that related to clinical effect .Methods 64 old patients with multilevel lumber spinal stenosis were selected and divided into microendoscopic group and open group based on different operation method ,each group contained 32 patients .Comparison was made between two groups in respects of operation time ,amount of bleed-ing ,hospital time post-operation and Nakai scores .Analyzed the influence factors that related to clinical effect .Results The opera-tion time ,amount of bleeding ,hospital time post-operation in microendoscopic group were lower than open group ,the differences had statistical significance .Based on the Nakei score ,the curative effect in microendoscopic group was slightly lower than open group ,but the differences had no statistical significance .The JOA score pre-operation ,walking distances and complication were rela-tive factors that could influence the clinical effect of microendoscopic discectomy through posterior approach method .Conclusion Microendoscopic discectomy through posterior approach in old patients with multilevel lumber spinal stenosis had quicker postoper-ative recovery than conventional operation ,and the JOA score pre-operation ,walking distances and complication were relative fac-tors that could influence the clinical effect of microendoscopic discectomy through posterior approach method .

Preliminary evaluation of the biological properties of poly-lactide-co-glycolic acid (PLGA) knitted mesh / 生物医学工程学杂志

This is a work aimed to investigate the biodegradability, biocompatibility and mechanical property of the poly-lactide-co-glycolic acid (PLGA) knitted mesh preliminarily and to further explore its applications in tissue engineering and regenerative medicine. The biological property of PLGA mesh was investigated comprehensively with the degradation experiment in vitro, the acute cytotoxicity assay, the intradermal irritation test and the subcutaneous implantation test in vivo utilized. The degradation experiment in vitro demonstrated that the pH value of the removed solution fluctuated between 6.68 and 7.33. The elastic modulus of the PLGA mesh increased at first and then decreased afterwards. The acute toxicity test and the intradermal irritation test indicated that the PLGA mesh was with innocuity safety. The PLGA mesh accelerated degradation and was replaced gradually by the neotissue. The results of immunohistochemical staining demonstrated that the number of ED-1+ cells increased at first and then decreased afterwards. The PLGA mesh with excellent mechanical properties, good biocompatibility and favorable degradation ratio has the potential to be employed as a "skeleton" to reinforce the mechanical property of collagen-based dermal substitutes in tissue engineering.

The Effect of Implicit Learning on Medical Moral Education / 中国医学伦理学

The purpose of the medical moral education is to make medical undergraduates form stable feature of the medical moral education psychology.While the traditional medical moral education has not been achieving the aim.Many studies of psychology has presented that it is important for study,training and medical moral of medical undergraduates by using implicit learning.In order to achieve the aim and ensure the result of medical moral education.we should take advantage of implicit learning to develop the medical moral education.