Objective:To prepare biomimetic tissue engineering scaffolds of gelatin/sodium alginate/laponite composite hydrogel loaded with BMSCs by 3D biological printing technique，and explore the osteogenic effect of 3D printing on hydrogel scaffolds containing bone marrow mesenchymal stem cells（BMSCs）.Methods:BMSCs were routinely extracted and identified by flow cytometry. Gelatin，sodium alginate and laponite were mixed and then BMSCs were added to prepare cell-containing composite hydrogel scaffolds using 3D bioprinting. Non-printed scaffolds containing cells were prepared by injection molding method. In vitro，the prepared scaffolds were divided into the printing group with cells and non-printing group with cells according to whether they were printed，with 12 samples per group. Another simple cell culture group was set as control. Then，the internal structure of the composite hydrogel was observed by scanning electron microscope，and the expansion rate and water content of the scaffolds were measured by freeze-drying method. At day 3 after culture，the growth status of BMSCs was observed by phalloidine staining. cell counting kit（CCK）-8 assay was used to detect cell activity in scaffolds at days 1，3，and 7 after culture and RT-PCR to detect the expression of osteogenesis related genes Osterix，osteocalcin（OCN）and collagen I at days 7 and 14 ofter culture. In vivo，four groups were set according to printing or not and whether containing cells or not：printing implant group with cells，non-printing implant group with cells，printing implant group without cells and non-printing implant group without cells，with 9 samples per group. Scaffolds in four groups were implanted to the posterior gluteal muscle pouches（random on left or right）of 36 8-week-old SD rats，respectively. The samples were taken X-ray images at 2，4 and 8 weeks after operation，respectively. The osteogenic differentiation of tissues at 8 weeks was observed by HE and Masson staining. Results:The flow cytometry showed that the cells were BMSCs. Internal pores of hydrogels were obvious，and cells stretched freely in the pores. Differences of the swelling rate and water content were not statistically significant between printing group with cells［（1，039.37±30.66）%，（91.21±0.26）%］and non-printing group with cells［（1，032.38±35.05）%，（91.16±0.28）%］（ P>0.05）. At day 3 after culture in vitro，the cells grew well in the hydrogel. After culturing for 1 day in vitro，there was no significant difference in absorbance between printing group with cells and non-printing group with cells（ P>0.05）. At day 3 after culture，there was no significant difference in absorbance between printing group with cells and non-printing group with cells，but both groups showed a higher level than simple cell culture group（ P<0.05）. At day 7 after culture，the absorbance in printing group with cells（2.72±0.17）was higher than that in non-printing group with cells（2.35±0.11），and both of which were higher than that in simple cell culture group（1.95±0.12）（ P<0.05）. At day 7 after culture in vitro，there was no statistically significant difference in the expression of osteogenic differentiation-related genes between printing group with cells and the non-printing group with cells（ P>0.05），but they were all higher than those in simple cell culture group（ P<0.05）. At day 14 after culture in vitro，the expression of osteogenesis-related genes Osterix（1.650±0.095），OCN（2.725±0.091），collagen I（2.024±0.091）in printing group with cells were higher than those in non-printing group with cells（1.369±0.114，2.174±0.198，1.617±0.082，respectively）and those in simple cell culture group（1.031±0.094，1.116±0.092，0.736±0.140，respectively）（ P<0.05）. After implantation for 2 weeks in vivo，with no statistically significant difference in the gray values of X-ray films in each group（ P>0.05）. At weeks 4 and 8 after implantation，the gray values of X-ray films in printing implant group with cells and non-printing implant group with cells were higher than those in printing implant group without cells and non-printing implant group without cells（ P<0.01）. At 8 weeks after implantation，HE staining showed that the scaffolds were degraded in different degrees and immersed with cells，with collagen production seen in Masson staining as well. Conclusions:Composite hydrogel scaffolds can provide a good three-dimensional environment for BMSCs growth. 3D bioprinting can promote the proliferation and osteogenic differentiation of BMSCs in hydrogel scaffolds. In addition，BMSCs-loaded scaffolds can be degraded slowly in vivo with good ectopic osteogenic ability.

Objective To compare the serum index after colonoscopy high-frequency electric snare combined with nylon cord ligation and high-frequency electric resection in treating broad pedicle polyps. Methods 70 cases of broad pedicle polyps patients from July 2012 to May 2016 were chosen as research object. The operation methods and laboratory examination results of all the patients were reviewed. All patients were divided into observation group (n = 37) and control group (n = 33). Patients in observation group were treated by colonoscopy high-frequency electric snare combined with nylon loop ligation, while patients in control group were treated by high-frequency electric resection only. The blood loss and related indexes of the two groups were recorded. Before and after operation, stress hormones and acute phase proteins in serum was determined. Results Intraoperative blood loss of observation group was less than that in control group, postoperative hemoglobin levels was higher than that in control group, postoperative early bleeding rate, postoperative delayed bleeding rate of observation group were lower than that in control group (P < 0.05); 1 hour after surgery, Cor, ACTH, AT II, NE, CRP, SAA, AAT in serum were lower than those in control group (P < 0.05). Conclusion Through colonoscopy high-frequency electric snare combined with nylon cord ligation can reduce bleeding during and after surgery, relieve stress and inflammation.

Objective To investigate the sleep quality of in vitro fertilization and embryo transfer ( IVF-ET)patients.Methods A total of 92 patients were selected and accepted fertility treatment from October to November, 2012.Then, we investigated their sleep quality using the Pittsburgh sleep quality index ( PSQI) scale.Results Among the 92 IVF-ET patients, 19 patients ( 20.6%) at the first day during period , 43 patients (46.7%) on the day of oocyte retrieval , and 42 patients (45.6%) on the seventh day after embryo transfer got a score of PSQI over 7, which indicated that a number of patients who had experienced sleep disorders and the problem remained at a high level .At the first day during period , IVF-ET patients ’ score of PSQI in sleep quality, the time to fall asleep, sleep time, sleep efficiency, sleep disorders, daytime dysfunction, and the total score were (0.89 ±0.64), (0.96 ±0.75), (0.89 ±0.69), (0.46 ±0.76), (1.08 ±0.60), (1.05 ±0.72) scores, and (4.78 ±2.39), respectively, which were higher than the norm score of (0.63 ±0.68), (0.70 ±0.86), (0.70 ±0.58), (0.15 ±0.47), (0.90 ±0.44), (0.73 ±0.83), and (3.88 ±2.52) scores.The differences were significant (t=2.795 6, 2.274 8, 2.141 8, 3.412 9, 2.424 4, 2.922 3, 2.597 7, respectively;P<0.05).On the day of oocyte retrieval, IVF-ET patients’ score of PSQI in sleep quality, the time to fall asleep, sleep time, sleep efficiency, sleep disorders, daytime dysfunction, and the total score were (1.22 ±0.55), (1.23 ±0.79), (1.17 ±0.72), (0.91 ±0.93), (1.24 ±0.54), (1.38 ±0.72), and (7.23 ±2.07) scores, respectively.On the seventh day after embryo transfer , those scores were (1.08 ±0.58), (1.27 ±0.68), (1.18 ±0.77), (0.90 ±0.88), (1.27 ±0.54), (1.43 ± 0.76), and (7.09 ±1.87) scores, respectively.Compared with the first day during period , the differences of scores were significant (F=7.067, 4.879, 4.829, 8.427, 3.231, 7.232, 38.521, respectively;P<0.05). Conclusions The sleep quality of IVF-ET patients were significantly decreased , so measures should be taken to improve the sleep quality during different stages of treatment .