The current prevalence of myopia has been as high as 27.65%～53.80%among adolescents in Chinese schools.The major reasons are too much near-work activity and lack of outdoor activity for a long time.In order to reduce the prevalence of myopia in Chinese adolescents,we suggest that Chinese students should have 3.5 hours outdoor activity everyday,including 30 minutes travel between home and school,1 hour outdoor activity between classes,1 hour outdoor sport class at school,and 1 hour outdoor activity after school.

OBJECTIVE:To develop an HPLC method for simultaneous determination of calycosin-7-O-?-D-glycoside,ono-nin,calycosin and formononetin in Radix Astragali from eleven different habitats and to explore the internal factors of geoherbalism based on aspect of contents of active constituents. METHODS:The sample was separated on Zorbax Eclipse XDB-C18(250 mm?4.6 mm,5 ?m)column. The mobile phase consisted of acetonitrile-0.2% formic acid solution (gradient elution). The UV detection wavelength was set at 280 nm. RESULTS:The linear ranges of calycosin-7-O-?-D-glycoside,ononin,calycosin and formononetin were 0.005 1～0.510 mg?mL-1,0.005 0～0.300 mg?mL-1,0.004 9～0.294 mg?mL-1,0.004 6～0.276 mg?mL-1,respectively(r=0.999 9).Calycosin-7-O-?-D-glycoside and ononin took up a big proportion in Radix Astragali from Inner Mongolia and Shanxi; calycosin and formononetin took up a big proportion in Radix Astragali from Anguo,Chicheng of Hebei province and Dingxi of Gansu province. CONCLUSION:The method is simple,rapid and accurate. Results of study are in line with textual research on Radix Astragali.

Objective To learn the status of core competency of cardiovascular specialist nurses in military hospitals in order to supply evidence to establish contrapuntal training protocol.MethodsThe Competency Inventory for Registered Nurse Scale (by LIU Ming) was distributed to investigate the core competency of 156 registered nurses.The data underwent analysis.Results The overall score of core competency level was (3.17±0.69),the highest mean score was the dimension of legal and ethical practice,and the lowest mean score was the dimension of critical thinking and nursing research apititude.the core competency varied with professional title and staffing.Evident difference existed in different dimensions and total scores.Conclusions The overall core competency is at the upper middle level for cardiovascular specialist nurses.They are competent enough to provide healthcare.The cultivation of nurses' critical thinking and nursing research ability should be strengthened.The nursing administrators should carry out pertinent training for nurses according to their different professional levels.

Objective To investigate the effects of dieting and exercise intervention on lipid level in patients with hyperlipidemia.Methods Health education including dieting and exercise interventions was given to 1,800 patients with hyperlipidemia.Serum total cholesterol(TC), triglyceride(TG), high density lipoprotein(HDL-C)and low density lipoprotein (LDL-C)levels were assessed before and after interventions.Result TC, TG and LDL-C levels were decreased and HDL-C increased after interventions with statistical significance(P<0.01).Conclusions Dieting and exercise intervention can be effective in controlling lipid levels effectively.Health education should vary among individuals to achieve good effects.

Objective To observe the anal exhaust effect in patients treated with warm water foot bath after laparoscopic surgery.Methods 90 cases after laparoscopic surgery including renal cancer , renal cysts, epinephrine-tumor patients were randomly divided into A , B and C group.Nursing measures were given at 6 hours after operation. A group were treated with warm water feet bath ; B group received abdominal ring massage ; And C group were control group.Time of anal exhaust postoperatively was observed among the 3 groups.Results Anal exhaust time after oper-ation in A group was average (24.34 ±0.28) hours, which was significantly shorter than in B group (33.07 ±0.18) h and C group (37.90 ±0.19) h (p <0.01).Conclusion Warm water foot bath can promote the anal exsufflation rapidly, effectively after laparoscopic surgery in Urology patients , and has great significance helpful to early recovery .

AIM:To find a new way of treating premature beats(PB) to evaluate the efficacy and safety of Yi-(xinshu) Capsule(Radix et Rhizoma Ginseng,Radix et Rhizoma Salviae miltiorrhizae,Radix Ophiopogonis,Radix Astragali,etc.) METHODS:Randomized,controlled clinical study were conducted in 60 patients with atrial premature beats(APB),and 60 patients with premature ventricular beats(PVB).APB patients were randomly divided into two groups:Yixinshu Capsule plus Isoptin(study group,n=30) and Isoptin group(control group,n=30).PVB patients:Yixinshu Capsule plus Mexiletine(study group,n=30) and Mexiletine group(control group,n=30).Those patients were treated for four weeks.We used 24 h Holter to monitor the times of PB and myocardial ischemia in before and after treatment.RESULTS:In the study group and control group,the times of APB and PVB were decreased obviously after 4 weeks treatment(P

OBJECTIVE To get knowledge of the drugs resistance change of Pseudomonas aeruginosa in intensive care unit ICU, so as to offer the first-hand information to the clinical preventive and therapeutic countermeasures. METHODS Antimicrobial susceptibility tests of Staphylococcus aureus(SAU) were performed from 2001 to 2006. RESULTS The most frequent isolates were P. aeruginosa, Klebsiella pneumonia and Acinetobacter baumannii in 2001-2004. S. aureus were more than A. baumannii in 2006 and became the majore isolated bacteria in the sputum of the ICU patients. The incidence of drug resistance increased yearly(0, 25.0%, 29.4%, 74.4%, 87.7%, 92.7%, respectively) in S. aureus, and it was susceptibte to vancomycin. CONCLUSIONS It was showed that P. aeruginosa, K. pneumonia, A. baumannii and S. aureus were the major pathogens in the ICU, showing high drug resistance. Doctors should pay more attention to analyze the bacterial resistance profile in order to decrease the incidence of drug resistance and use the antibiotics properly.

Objective To summarize the clinical data and laboratory features of vera polycythemia incorporated with hemolysis in one case. Methods The treatment and diagnosis of series of laboratory detection with conventional cytogenetics,mutation detection in JAK2V617F,BCR/ABL fusion gene were investigated with literature. Results JAK2V617F point mutation was detected positively,BCR/ABL fusion gene was negative and trisomic chromosome 8. The case was mend and discharged after successively treated with conventional treatment of dexamethasone,antiinfective,hepatoprotective and follow-up treatment of bloodletting,hydroxyurea and interferon.Conclusions The onset of vera polycythemia is latent which is difficult to find in the early phase.Allele-specific PCR (AS-PCR) of JAK2V617F mutation will be helpful to the diagnosis.

Objective To provide scientific evidence for the identification and development of fructus psoraleae through its pharmacognostical study.Methods To identify fructus psoraleae by paraffin section and powder method,meanwhile,morphological identification and physical and chemical identification were also adopted.Results The morphological and microscopic characteristics of transverse section and powder of fructus psoraleae were described; fluorescent speckles of the same color were found in the same place of test samples and psoralen and isopsoralen reference by thin layer chromatography; results of water and ash determination all complied with Chinese pharmacopoeia specification,water and 70％ ethanol extractives were 21.93～39.68％,22.03～31.77％,respectively.Conclusion The established method was simple and practical with reliable results,and suitable for the identification of fructus psoraleae.

【Objective】 To investigate the molecular basis of hepatolenticular degeneration (Wilson disease, WD) and to attempt to construct the feasibility of gene diagnosis in the disease. 【Methods】 We have performed the molecular biological study on this disease for 10 years by molecular geneti c techniques. 【Results】 ①Location of WD gene in Ch inese: Using pairwise linkage analysis and multipoint linkage analysis method, w e constructed a genetic map of DNA markers within D13q14.2-3 which refined the location of WD gene by restriction fragment length polymorphism(RFL P) and microsatellite polymorphism analysis; ②Screen for mutations of WD gene in Chinese people: we detected the structure of 21 exons of WD ge ne in 45 patients from 39 pedigrees by PCR-SSCP(Single strand conformation poly morphism) and PCR-DNA sequencing technology, found a new mutation in exon 5 and nuclcotide sequence analysis showed it is a T insertion. We also conformed the Arg778Leu in exon 8, the highest frequence mutation point in Chinese people, wit h mutation rate 22.8% in total;③Carrier detection and presymptomatic diagnosi s of WD: Based on DNA recombination technology, we peformed successfully the gen e diagnosis in all individuals of 79 families with WD and built up a helpful spe cific enzyme cut method (PCR-Msp1) to detect the carrier and presympomatic patients in Chinese pe ople with WD. 【Conclusion】 These results showed that the location of WD gene within D13q14.2-3 is the same in Chinese as in Caucasians, but the g ene high m utation point,the gene diagnosis method and its pathogenesis are markly different.