OBJECTIVE: There are some people in population susceptible to acute mountain sickness. Therefore, it is important to analyse, assess and integrate certain research results to build prediction system and mathematics model in order to predict those susceptible people when army goes to tableland.DATA SOURCES: Computer was used to search databases such as Medline, PubMed and PML to find articles regarding prediction of people susceptible to acute mountain sickness from January 1970 to December 2002 with the search words "acute mountain sickness, susceptible population,prediction" . The language was limited to English. At the same time, Chinese Journal Full-text Database, Chinainfo and CBMdisc were searched to find articles from January 1970 to August 2004 by the Chinese language of "acute mountain sickness, susceptible population and prediction". The research targets are susceptible people to acute mountain sickness. At last,trace-back method was used to supplement some literature and monographs.DATA SELECTION: After systematically analyzed and concluded the literature information and screened researches without conducting experiment, full text of the rest literature was searched and used as selective criteria if it could be used as prediction indicator of susceptible people to acute mountain sickness.DATA EXTRACTION: Totally there were 19 prediction indicators generalized. After conducting systemic analysis, Delphi method and analytic hierarchy process(AHP) to the indicators, 13 were selected while the other 6 were excluded.DATA SYNTHESIS: The indicators were classified according to nervous-humoral regulation ability, oxygen capture ability of respiratory system,anti-anoxia ability of central nervous system, mental health and health service ability. Based on these, system analysis, Delphi method and AHP method were used to screen prediction indicators, establish indictor system, confirm the weighted indicators and weighted indicator system as well as standardize the prediction indicators.CONCLUSION: According to the principle of prediction model and model methods, weighted linear synthesis method was used to build the predictive mathematic model. The project of susceptible population prediction of acute mountain sickness in army when entering tableland urgently was proposed combining the health service ability of army.

The status and progress in research of anti-AIDS agents at home and abroad are reviewed, some suggestions have been made for further steps in this research work.

Acupuncture Therapy ; Adult ; Bursitis ; immunology ; therapy ; Chronic Disease ; therapy ; Female ; Hip Joint ; immunology ; Humans ; Male ; Middle Aged

Objective: To establish the ultrafiltration process of concentrating insulin-like growth factor-1 (IGF-1) from Cervi Cornu Pantotrichum (CCP). Methods: The ultrafiltration technique was utilized to concentrate the IGF-1 with CCP freeze-dried powder as raw material. The polyethersulfone (PES) membrane and modified PES membrane were compared and studied. The effects of relative molecular weight cutoff (RMWCO), pressure, and pH value on IGF-1 ultrafiltration process were investigated. Furthermore, the cleaning methods were investigated, and the optimal conditions were obtained. Results: The optimal conditions were as follows: The RMWCO of PES membrane was 4 000, the RMWCO of modified PES membrane was 5000, the pressure was 0.3 MPa, and the pH value was 12. The recovery rate of IGF-1 and protein reached 68.32% and 69.20%, respectively by the PES membrane, while the recovery rate of IGF-1 and protein reached 57.17% and 87.43% respectively by the modified PES membrane. Four different methods were employed to clean the membrane. The results showed that the membrane immersed in 0.4% NaOH-0.1% NaClO solution for 24 h was the appropriate cleaning method, by which the PES membrane permeation flux recovery rate could reach 98.65% and the modified PES membrane permeation flux recovery rate could reach 93.75%. Conclusion: The IGF-1 could be easily concentrated and separated using the ultrafilter condensing technique. The process is easy and stable, and the membrane is easy to be cleaned and has high recovery rate, which has the high potential of industrial production and application.

Objective To evaluate the quality of examination papers of otolaryngology among students of grade 2007 in the first clinical college of Chongqing Medical University.Methods Totally 202 copies of examination papers of otolaryngology from grade 2007 students in our college were taken as research references.SASS 15.0 software was used to statistically analyze total score of every student and score of each question.Mean score,standard deviation,difficulty coefficient and discrimination coefficient of each question were counted and normality test was conducted.Results Scores were in negative skewness distribution,with mean score of 80.9,standard deviation of 10.9,the lowest score of 56.5,the highest score of 98.0,difficulty coefficient of 0.781,and discrimination coefficient of 0.308.Conclusions Examination papers are well designed and discriminated and can objectively reflect students' command of the course.However,distribution of sores is unreasonable and examination paper is relatively easy to complete,indicating the weakness in the teaching process.

Objective To analyse the personality characteristics of medical undergraduate and graduate newcomers. Methods Cattell 16 Personality Factor Questionnaires (16PF) were employed to assess the personality of 675 undergraduate newcomers (306 males and 369 females) and 155 graduate newcomers (76 males and 79 females),and the results were compared with the established findings of the country. Results Compared with male undergraduate newcomers,the scores of rule-consciousness,self-reliance and environmental adaptation of male graduate newcomers were higher,while those of sensitivity,openness to change,tension,cowardice and bravery were lower (P

Objective:To compare therapeutic effects of hemodiafiltration (HDF) ,hemoperfusion combined hemodi‐alysis (HP+ HD) and high flux hemodialysis (HFHD) on uremic refractory hypertension (URH) .Methods :A total of 60 URH patients undergoing maintenance hemodialysis (MHD) were selected from three hospitals .They were randomly and equally divided into HDF group ,HP+ HD group and HFHD group .The 24h ambulatory blood pres‐sure ,concentrations of parathyroid hormone (PTH) andβ2‐microglobulin (β2‐MG) were detected and compared a‐mong three groups before ,after first treatment and 12 weeks after treatment .Results:Compared with before treat‐ment ,after the first treatment ,there were significant reductions in blood pressure ,blood concentrations of PTH andβ2‐MG in three groups , P< 0.05 or <0.01 ,and therapeutic effect was most significant in HP + HD group ;compared with after first treatment ,12 weeks later ,blood concentrations of PTH and β2‐MG further significantly reduced in three groups (P<0.05 or <0.01) ,compared with HDF group and HFHD group ,there was significant reductions in blood concentrations of PTH [(211.12 ± 50.05) pg/L ,(195.49 ± 48.32) pg/L vs .(75.43 ± 14.38) pg/L] andβ2‐MG [ (9.16 ± 5.02) mg/L ,(9.92 ± 5.37) mg/L vs .(5.39 ± 2.09) mg/L] in HP+ HD group , P<0.01 all .In HDF、HP+ HD、 HFHD groups ,the DBP were [ (86.70 ± 12.76) mmHg)、 (86.10 ± 9.84) mmHg)、(90.95 ± 10.15) mmHg] respectively ,those were return to normal mainly ,and no significant difference ,the SBP were [ (140.75 ± 10.85) mmHg)、(146.20 ± 8.31) mmHg)、(146.30 ± 9.65) mmHg) ,those were close to normal and no significant difference also .Adverse reactions were mild in three groups ,that of HDF group was significantly less than those of HP+ HD group and HFHD group [0 vs .40% ,45% , P<0.05 all] .Conclusion:HDF ,HP+ HD and HFHD could effectively remove blood PTH and β2‐MG ,and lower blood pressure in URH patients .Hospital may choose therapeutic plan according to specific needs of patients and HD room condition .

Objective Through detect the expression of DLC1 and RhoA protein in breast cancer tissues ,investigate the effect of DLC1 and RhoA in lymphatic metastasis of breast cancer .Methods Totally 25 breast cancer specimens that had occurred lymph node metastasis and 30 breast cancer specimens that had not occurred lymph node metastasis were collected ,the expression of DLC1 and RhoA were tested by immunochemistry ,and the experimental data were analyzed by statistical methods .Results The positive rate of DLC1 in the breast cancer specimens that had occurred lymph node metastasis was 44 .00% ,that had not occurred lymph node metastasis was 73 .33% (χ2 =4 .889 ,P=0 .027) ,and the positive rates of RhoA in the two specimens were 92 .00%and 50 .00% (χ2 =11 .264 ,P=0 .001) .Spearman rank correlation analysis showed the expression of DLC 1 and RhoA had a nega‐tive correlation in breast cancer tissues (r= -0 .454 ,P=0 .000) .Conclusion The breast cancer lymphatic metastasis and is closely related to the low expression of DLC1 and the high expression of RhoA .

The gastrointestinal tract harbors a complex microbiota,which contains almost 30 genera,400 to 500 species.The factors influencing human intestinal microbiota include host and environmental ones,with the most important environmental factor being diet.Dietary fiber,fat,and protein have different impact on gastrointestinal microbiota and the microbiota in turn plays an important role in maintaining health.Its variation can lead to many diseases.Knowledge of the interaction between diet and gastrointestinal microbiota may be conducive to reaching a better understanding of some diseases,and to discovering better preventive and therapeutic strategies.

BACKGROUND: As a method to effectively improve organic tolerance and velocity, altitude training has been gradually accepted by the coaches,and it is a problem to be solved to find the optimal altitude.OBJECTIVE: To establish rat models of stimulating altitude training, and observe the changes of myocardial cell structure in the altitude training, so as to provide scientific animal models for the physiological studies of altitude training, and provide more scientific theoretical evidence for the altitude training of athletes.DESIGN: Based on the division of altitude region in aerospace medicine,the experimental animals were divided into different altitude training groups and control groups. Morphological characters of cellular and subcellular structures were observed under electron microscope, the biochemical analysis of cardiac troponin T were performed, and then the myocardial injury was completely analyzed from two pathways of morphology and biochemistry.SETTING: Laboratory of Sports and Human Sciences, Tsinghua University.MATERIALS: The experiments were carried out in the Laboratory of Sports and Human Sciences, Tsinghua University from January 2000 to December 2002. Totally 372 male SD rats were used. The experimental materials included hypobaric oxygen chamber, Japanese H-500 transmission electron microscope and the kit for testing serum cardiac troponin T index.METHODS: After adaptive swimming training for 1 week, all the 372 rats were randomly divided into 9 groups and 54 subgroups, only 6 groups of them were analyzed in this experiment, including stimulating acute altitude hypoxia training at 4 000 m group (n=32), hypoxia without training group (n=24), stimulating acute altitude training at 4 000 m followed by reoxygen training for 1 week group (n=32), stimulating acute altitude training at 4000 m followed by reoxygen training for 2 weeks group (n=32), increasing altitude training group (n=32) and plain training control group (n=24). Rats in the plain training control group lived and trained in normal conditions,and those in the other groups all trained with swimming in the stimulating altitude environment for 4 weeks. They were trained for 7 days every week,once a day and 60 minutes for each time for 4 weeks. The serum cardic troponin T index of rats was detected and observed with enzyme-linked immunoabsorbent assay (ELISA). After stimulating acute altitude training at 4 000 m for 4 weeks followed by reoxygen training for 2 weeks, the rats were killed, and a small piece of myocardial tissue was taken from left and right ventricles, then double-stained with uranyl acetate and lead citrate,and the ultrastructure of the sections was observed with Japanese H-500 transmission electron microscope.MAIN OUTCOME MEASURES: The serum cardiac troponin T index of rats trained at different altitude, and the results of spectrum and observation of myocardial ultrastucture under electron microscope were mainly observed.RESULTS: ① Changes of body mass: The myocardial increasing rate in the hypoxia training group was significantly different from those in the hypoxia without training control group and plain training control group (P ＜ 0.01), and there was also significant difference between the latter two groups (P ＜ 0.05). The increasing rate of body mass was significantly different among the hypoxia training group, hypoxia without training control group and plain training control group (22.41％, 28.14％, 33.48％,P ＜ 0.01-0.05). ② Results of cardiac troponin T: Compared with the hypoxia without training group, the value of cardiac troponin T in the hypoxia training groups was significantly different, and significantly increased with weeks of training (P ＜ 0.01). During the hypoxia altitude training below 4 000 m for 1-4 weeks, the value of cardiac troponin T ranged in creased from 0.09 to 0.128 μg/L, and it gradually recovered to 0.09 μg/L after reoxygen training in plain for 2 weeks. ③ The results of observation under electron microscope showed that after acute hypoxia training at 4 000 m for 4 weeks, myocardial mitochondrial structure occurred mild swelling with the prolongation of training, and for the rats received reoxygen training in plain for 2 weeks, the thick and thin myofilaments of myocardial fibers formed light and dark bands were clear and distinct, and the myotomes arranged orderly, besides clustered or scattered glycogen granules, a great amount of mitochondria also existed among muscular bundles, no swelling, degeneration of vacuoles, lysis necrosis, interstitial edema and other pathological changes were observed.CONCLUSION: It is safe to train rats at any altitude below 4 000 m. The acute exercise training of great intensity directly at 4 000 m will cause the mild injury of cardiac subcellular structure, and the increase of cardiac troponin T concentration. The training by means of increasing altitude has slighter influence on the myocardial injury, and the recovery after training is also faster.