Pterygium is a common disorder of ocular surface with unknown etiology and pathogenesis. The epidemiological studies around the world have shown that the prevalence rates range from 0.3% to 37.46%. Pterygium is related to geographic setting, sunlight and ultraviolet exposure,age, gender, economic situation, dry eye syndrome and others. The purpose of this review is to present a summary of the more recent literature about the epidemiological study, paying particular attention to prevalence and risk factors of pterygium.

Objective To investigate the prevalence of nutritional risks and malnutrition as well as the application of nutritional support in the department of geriatrics.Methods Elderly inpatients in the Geriatric Department of Peking University People's Hospital were consecutively enrolled from July 2010 to June 2011.Nutritional Risk Screening 2002 ( NRS 2002) was performed on the second day after admission,and nutritional support was investigated on the 14th day or the discharge day.The relationship between nutritional risk and nutritional support was analyzed.Results A total of 445 patients were enrolled,and 423 patients (95.1％ ) underwent NRS 2002.The overall prevalence of undernutrition was 4.7％ and nutritional risk was 13.2％.In 230 patients with overweight/obesity,the prevalence of nutritional risk was 6.1％.Nutritional support was provided to 15 patients (26.8％ ) with NRS2002≥3 and 14 patients (3.8％) with NRS 2002 ＜3.The average parenteral nutrition:enteral nutrition ratio was 1.6∶1.Conclusions A large proportion of elderly inpatients are at nutritional risk or suffer from undernutrition in the geriatric department in Beijing.The application of nutritional support currently is somehow inappropriate.Evidence-based guidelines are required to improve this situation.NRS2002 is not applicable for elderly inpatients with overweight/obesity.

Objective To assess the effect of ongoing health education compared to a single comprehensive health program on nutritional knowledge,attitudes and practices(KAP) of hospitalized diabetes patients to provide a basis for improving health education for these patients.Methods Newlyhospitalized patients with diabetes were randomly classified into Group 1 ( Conventional Education Group; 50 cases) and Group 2 (Intensive Education Group; 58 cases).A single comprehensive health program was conducted for Group 1,and an ongoing health program was provided for Group 2. A self-designed questionnaire was administered to the two groups before and after the health education,and nutritional KAP of these patients were compared.ResultsIn both groups,after health education,the nutritional KAP of the newly enrolled inpatients were substantially improved.For control of total energy intake,control of salt intake and food exchanges,the improvement rates of Group 2 [ 88.4％ ( 38/43 ),84.6％ ( 33/39 ),60.9％ (28/46),respectively] were higher compared to Group 1 [71.1％ (27/38),65.6％ (21/32),40.0％ (16/40),respectively ].The differences were significant ( x21 =4.75,x22 =4.83,x23 =4.37,respectively,P ＜ 0.05).For importance of health education,the improvement rate of Group 2 [ 95.8％(23/24) ] was significantly higher than that of Group 1 [65.2％ ( 15/23),x2 =14.90,P ＜0.01 ].For therapeutic diet,the improvement rate of Group 2 was 14/14,significantly higher than that of Group 1 (5/13; x2 =44.40,P ＜ 0.01 ).Conclusion Health education is an effective way to improve the nutritional KAP of inpatients with diabetes.An ongoing health program should have a more significant role in health education for these patients than a single program.

One hundred and twenty elderly inpatients (average aged 78) were randomly sampled from the Department of Geriatrics, Peking University People's Hospital for a questionnaire survey on the knowledge, attitude and practice (KAP) before and after receiving nutritional education. The results showed that the average score for nutrition knowledge of the subjects was 46 ± 21 and 85 ± 18 before and after nutrition education respectively (P ＜0. 01 ); the progress for patients aged over 80 was more remarkable:nutrition knowledge score increased to 83 ± 18 from 41 ±21 on the admission ( P ＜0. 01 ). Before nutritional education, the rates of treatment diet implementation, ordinary diet implementation and hospital repast were 48.9%, 57.7% and 50. 8%, respectively, which reached to 93. 6%, 100. 0% and 95.0% after nutritional education (P ＜0. 01 ). The results indicate that the nutrition education is an effective approach to improve nutritional KAP among elderly inpatients. We propose to implement nutrition education in elderly inpatients as a routine clinical treatment measures.

BACKGROUND:The brachial plexus injury anastomosis suture technique is necessary to understand the mechanics characteristic of brachial plexus nerve stress relaxation.Previous studies mainly focused on single tension mechanics of brechial plexus nerve,but few studies concerning stress relaxation and creeping elasticity.OBJECTIVE:To observe and analyze experimental animal brachial plexus nerve stress relaxation mechanics characteristic in the description manner of function,to provide experimental parameters for clinic.DESIGN,TIME AND SETTING:The experimental observations to use function as a way to describe from 1~(st) to 10~(th_ March,2007 at the Experimental Center of Jilin University.MATERIALS:The experimental male Sprague Dawley rats aged 6 months were provided by Changchun Gaoxin Medicine Animal Experimentation Center.METHODS:The stress relaxation experiment was performed in Experimental animal Brachial plexus Nerve on the the electronic universal testing machine (Shimadzu,Japan).The stress relaxation experiment strain increased speed was 1%/s,setting time of 7 200 seconds.100 empirical data were collected and disposed by one-way linear regression analysis.MAIN OUTCOME MEASURES:The stress relaxation data and curve,the Stress and time change rule were measured.RESULTS:The stress relaxation quantity of animal brachial plexus nerve test specimen at 7 200 s was 0.316 MPa.Stress relaxation curve changed with logarithm.Stress relaxation changed rapidly at 600 seconds,decreased gradually,and reached a balance level at 7 200 seconds.CONCLUSION:The stress relaxation curve changed with the logarithm relations.Brachial plexus has visco-elastic mechanical properties.

Objective To analyze the etiology and clinical features of isolated gastric varices.Methods A retrospectives analysis was carried out in 31 patients with isolated gastric varices between January 2003 and January 2008.The patients records including data of etiology,clinical presentation,imaging studies and therapeutic modalities were reviewed.Results Those who had isolated gastric varices were accounted for 7.38 0A (31/420)of all patients with gastroesophageal varices.The etiologies were left-sided portal hypertension(14 cases,45.2%),liver cirrhosis(8 cases,25.8%),unknown origin(6 eases,19.4%),hepatocellular carcinoma(2 cases,6.5%),portal cavernous transformation(1 case,3.2%).Twenty-one patients(67.7%)had variceal hemorrhage.Splenomegaly was present in 21 cases(67.7%),among which 10 cases(32.3%)had concomitant hypersplenism.Venous involvement was identified in 18 patients(splenic vein obstruction in 9 cases and portal vein involvement in 9 cases).Surgical therapy was performed in 8 cases,selerotherapy in 3 cases,and medical therapy in 20 cases.Conclusions Left-side portal hypertension is responsible for most of the isolated gastric varices,and some of which are also caused by liver cirrhosis.Surgery is the appropriate procedure of choice in management of hemorrhage and recurrence.

BACKGROUND: Neural stem cells are always derived from fetal rats and adult rats, and it is complex to isolate the cells by cell culture.OBJECTIVE: To study a convenient and effective method for the isolation and the culture of neural stem cells in neonatal rats.DESIGN, TIME AND SETTING: An observation study based on cells was carried out in the Chongqing Medical University (Chongqing, China) from October 2006 to March 2007.MATERIALS: Wistar neonatal rats of 1-3 days old.METHODS: Subsequent to trypsin digestion, primary culture of the cells was performed in serum-free suspension culture medium. Then the cells were induced to incubate in DMEM/F12 containing 0.10 volume fraction of fetal bovine serum. MAIN OUTCOME MEASURES: Phase contrast microscopy was employed to observe the growth of neural stem cells and the morphology of the differentiated cells. Neural stem cells and the differentiated neurons were identified using indirect immunofluorescence cytochemistry, as well as expression of gilal fibrillary acidic protein. Moreover, the proliferation of the BrdU-labeled neural stem cells was also investigated.RESULTS: The neural stem cells isolated from neonatal rat brains had the potential of serial passage and proliferation, besides, they express neuroepithelial stem cell protein (nestin) and differentiate into neurons, astrocytes and oligodendrocytes.CONCLUSION: Neural stem cells can be harvested from neonatal rat brains at a large scale, and they maintain their undifferentiated features and have the capacity of self-renewal and pluripotentiality.

High altitude retinopathy ( HAR ) refers to the body which can't adapt to the hypobaric hypoxia environment at high altitude leading to retinal diseases, which typically manifested as retinal hemorrhages, optic disc edema and cotton wool spots. With the development of high altitude medicine, HAR become a hot topic of eye research in recent years. New researches show a significantly higher incidence of HAR, and HAR has a close contact with acute mountain sickness, high altitude cerebral edema and high altitude pulmonary edema. A further study in pathogenesis and prevention measures of HAR will promote the prevention of altitude sickness. Traditional Chinese Medicine has achieved good effects in the prevention of altitude sickness, but the effect and mechanism of herbs on HAR has not been reported. Through read and summarize the relevant literatures and reports, the author will give an overview of the research advances on HAR's pathogenesis and application of Traditional Chinese Medicine.

ObjectiveTo investigate the clinicopathologic features,therapy,and prognosis of primary small cell carcinoma of the pancreas.MethodsDatabases including Chinese Journal Full-text Database,VIP Database for Chinese Technical Periodicals,Medline/Pubmed,and OVID were searched electronically up to April 2012.A systematic review was performed together with one case in our hospital.ResultsTwenty-eight articles fulfilling the criteria consisting of 46 patients with pathologically confirmed diagnosis of primary small cell carcinoma of the pancreas were studied,together with 1 patient in our Drum Tower Hospital,finally 47patients were included.The results of this systematic review showed:( 1 ) Primary small cell carcinoma of the pancreas was more common in men with a median age of 62.The most common clinical presentations were abdominal pain,jaundice and weight loss.Para-neoplastic syndrome was rarely observed.(2)Most cases were found to have abnormally elevated serum levels of neuron-specific enolase.CT displayed heterogeneous,and marked enhancing masses in most cases.The conclusive diagnosis depended on histological confirmation.(3)63.8％ of the cases were found to be associated with metastasis at the time of diagnosis.The overall median survival time was 28 weeks.(4) There was no consensus on the treatment of primary small cell carcinoma of the pancreas. Chemotherapy was currently considered as the treatment of choice among the systematic management for these patients.ConclusionsPrimary small cell carcinoma of the pancreas was a rare and aggressive neuroendocrine tumor with a poor prognosis.

The mucous barrier is a major physiological obstacle that the mucosal drug delivery system needs to deal with. In response to this physiological barrier, many achievements have been made in research of mucosal adhesion and mucus penetration. This review puts emphasis on the progress of the research on new mucosal adhesion strategies such as cationization, sulfhydrylization, maleimide functionalization, lectinization and catechol conjugation; polyethylene glycol (PEG), polyvinyl alcohol (PVA), poly (2-alkyl-2-oxazoline) (POZ), zwitterionic polymers and other mucus-inert materials, strategies to enhance mucus penetration ability such as enzyme functionalization, reducing agent pretreatment and so on. The problems of each strategy are also analyzed and discussed, which can provide some references for clinical transformation.