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@#Objective To evaluate the safety and efficacy of transapical mitral valve repair with moderate-to-severe or severe mitral regurgitation (MR) by using LifeClip system. Methods We retrospectively analyzed the clinical data of 7 symptomatic patients with moderate-to-severe or severe MR who received transapical mitral valve repair by using the LifeClip system in our hospital from July to November 2021. There were 5 males and 2 females with an average age of 76.0±7.5 years. Results There were 2 patients with degenerative MR and 5 patients with functional MR. All of the procedures were successful and 6 patients received 1 LifeClip while the other one patient received 2. The operation time was 135.7±46.9 min, the mechanical ventilation time was 12 (3, 14) h, and the hospital stay time was 18.1±4.1 d. No serious complications or death occurred during the perioperative or follow-up period. MR reduction by ≥ grades was achieved in all the patients at the one-month follow-up. The classification of cardiac function was improved in varying degrees. Conclusion Transapical mitral valve repair using the LifeClip system shows good safety and efficacy for severe MR patients, and MR degree is significantly improved at early follow-up. However, the benefit of LifeClip should be validated in a larger sample size of Chinese population and through long-term follow-up.
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Objective To explore the situation and question of standardized training of residents/graduate students in cardiac surgery by questionnaire survey. Methods From September 2010 to May 2012, 61 resident physicians/graduate students were chosen as research objects in Department of Cardiac Surgery, Peking University Third Hospital. A total of 61 questionnaires were sent out, with a recovery rate of 100%,and an effective rate of 95.1%.The contents of investigation included standardized training content design, standardized training management, the time and"environment" pressure, compliance training effect analysis,student opinion and others,a total of 14 options.EpiData 2.1a software was used to sort and record the data. SPSS 17.0 software was used for statistical analysis. The enumeration data were compared by chi square test.Results During the period of training,the most expected teaching method was"small lecture", accounting for 63.8%; The most difficult part of the process of cardiac surgery training was "postoperative care", accounting for 69%; 100% of the trainees thought that it would be helpful for future work through cardiac training;8.3% of the trainees thought the teachers of cardiac surgery teaching consciousness was not strong; resident weekend "in the hospital" was higher than the proportion of graduate students, and most graduate students chose weekend "in the experiment and research work", the difference was statistically significant (P<0.05). Conclusion Appropriate standardized training program should be combined with the students' background; Teaching team construction and clinical reasonable and effective clinical skills train-ing system is an important link to ensure the quality of teaching.The combination of residents' standardized training and postgraduate education of professional degree remains to be tracked and evaluated in a long time.The feedback from all aspects of the training should be paid more attention to,and the training details should be improved.
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Objective To investigate the effect of melatonin on osteoblast proliferation and osteogenic poten-tial in vitro cultured.Methods In vitro cultured human osteoblasts by different concentrations of melatonin (0, 1.0E -7,1.0E -6,1.0E -5,1.0E -4,1.0E -3mol/L)intervention 24 h,48 h,72 h,96 h.MTT assay was meas-ured by changes in cell proliferation,intervention in 96 hours,melatonin was measured by RT -PCR in cells OPG, RANK,RANKL influence,PTHLH mRNA expression.Results Compared with other groups,OD490 of the control group had statistical significance(all P <0.05).Compared with the control group,there were statistically significant differences in the ratio of OPG/RANKL of the dosing groups(all P <0.05).Conclusion Melatonin can promote the growth of bone into the cells and inhibit the action of bone cells into bone.
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In this study, the effects of blood glucose and blood pressure on the compliance of large and small arteries were investigated. The results showed that arterial compliances of both large and small arteries were decreased in patients with diabetes mellitus. In non-diabetic patients with well controlled blood pressure, the compliance of small arteries was markedly improved. These results suggested that both blood glucose and blood pressure affected arterial compliance.