Improved Research of Adjustable External Fixation Device for Lower Limbs Based on Semiconductor Refrigeration Sheet / 中国医疗器械杂志

A kind of adjustable external fixation device for lower extremity is designed. The circuit is mainly composed of TEC1-00703 semiconductor refrigeration chip, HZC-30A pressure sensor, STC89C52RC single chip microcomputer and other electrical components. It can realize the timing intelligent temperature control and meet the local fixed-point refrigeration. The design of adjustable structure and the application of intelligent air cushion can satisfy the full fixation of lower limbs of different individuals. Its operation does not need much medical knowledge. It can solve the problem of emergency transportation and follow-up treatment of lower limb injury in ice and snow sports. It has a good application prospect and universality.

Meta analysis of the risk factors on recurrent cerebral infarction / 中国医师进修杂志

Objective To synthetically evaluate the risk factors of recurrent cerebral infarction in Chinese population.Methods The research literature on the risk factors of recurrent cerebral infarction from the domestic December 2011 published was collected through computers literature retrieval (China Academic Journal,VIP Chinese Science and Technology Academic Journal,Wanfang Database) and literature review.Meta-analysis method was used to synthetically and quantitatively analyze the risk factors of recurrent cerebral infarction reported in China.All of the data were analyzed by STATA 11.0 software.Results The total research literature was 216 studies,and 12 studies were enrolled in this study according to the inclusion and exclusion criteria.All case-control study.There were 1599 cases in case group,2566 cases in control group cumulatively.Meta analysis showed that the summary statistics of sex,hypertension,diabetes,hyperlipemia,smoking,age were 1.58 (1.04-2.39),2.66 (2.02-3.51),2.23 (1.70-2.93),2.22(1.48-3.32),1.94 (1.64-2.29),1.58 (0.55-2.60),respectively.There were significances in statistics (Z =2.16,6.95,5.82,3.87,7.68,3.02,respectively,P ＜ 0.05).Conclusion Hypertension,diabetes,hyperlipemia,smoking,male and age are all the risk factors of recurrent cerebral infarction.