Objective To develop a kinetic chromogenic quantitative method for the determination of endotoxin content in intermediate of pertussis antigen,and to verify the method so as to better control the quality of diphtheria,tetanus,and pertussis vaccine(DTP vaccine).Methods A kinetic chromogenic assay[Limulus Amebocyte Lysate(LAL)]was developed to detect the endotoxin content in the intermediate products of pertussis antigens after detoxification,and verified for the linearity,specificity,accuracy,reproducibility and intermediate precision. The quantitative detection results of kinetic chromogenic assay were compared with those of gel method.Results The absolute value of the linear correlation coefficient（|r|）of the kinetic chromogenic assay was more than 0. 99;under the maximum effective multiple dilution,the interference test recovery of the intermediate was within 50% — 200%,and pertussis toxin(PT)diluted to 10,100 and 1 000 times,filamentous hemagglutinin(FHA)diluted to 3 000,5 000 and 10 000 times,and pertussis adhesin(PRN)diluted to 50,75 and 100 times had no interference effect on the experiment after detoxification;the accuracy verification recovery rates of PT,FHA and PRN were 125%,110% and 99% respectively;and the CVs of reproducibility verification were 7. 21%,8. 31% and 5. 84%,and the CVs of intermediate precision verification were 6. 04%,16. 29% and 12. 23%,respectively.The bacterial endotoxin content of the three batches of pertussis antigen intermediates detected by kinetic chromogenic assay was consistent with that verified by gel method,both of which were less than the limit of bacterial endotoxin in the intermediates of pertussis antigen after detoxification.Conclusion The developed kinetic chromogenic assay has good linearity,specificity,accuracy and precision with accurate detection results,which can be used to detect the endotoxin content in intermediate products of component pertussis antigen after detoxification.

Humans ; Mass Screening ; economics ; Research ; economics

Humans ; Research Design ; Retrospective Studies ; Surgical Procedures, Operative

Humans ; Medicine, Chinese Traditional ; methods ; Treatment Outcome

Biomedical Research ; Child ; Humans ; Multicenter Studies as Topic ; Pediatrics

Diabetic retinopathy is a highly specific vascular complication of both type 1 and type 2 diabetes.NF-?B can be triggered by oxidative stress and controls several programs of gene expression,the majority of which participate in the host inflammation and immune response.Evidence has accumulated that NF-?B is involved in the development of diabetic retinopathy.NF-?B activation induced by diabetes is associated with the apoptosis found in the pericyte,leukocyte-endothelial interaction,capillary basement membrane thickening,neovascularization and formation of epiretinal membranes.Inhibition of(NF-?B) activation has been suggested as a treatment strategy in diabetic retinopathy.

Objective: Intelligent monitoring system of medical equipment can realize the intelligent dynamic management to equipment in the hospital wireless or wired network environment. Methods: Use of communication network, intelligent call, system monitoring and other means of science and technology to design the intelligent micro device state sensor. Results:System is mainly for hospital equipment, which can capture and management of medical equipment data. When the elderly have abnormal condition, it can send information through intelligent system, through identification and location, to realize the construction of equipment state information. Conclusion: Intelligent sensor in the system application can achieve the sharing of resources; realize the whole hand or full coverage of the intelligent health network system, providing an effective guarantee for the health of the masses.

Objective: Thyroid nodules are common clinical thyroid disorders.The purpose of this study was to investigate the diagnostic value of the clinical characteristics and various parameters of malignant thyroid nodules and the sensitive indexes for their differentiation so as to improve the diagnosis of malignant thyroid nodules and avoid unnecessary procedures or operations.Methods: We retrospectively studied 600 cases of thyroid nodules treated by surgery from 2001 to 2008,divided them into a benign and a malignant group according to the pathological results,and analyzed by multivariate logistic regression the correlation between the nature of thyroid nodules and various factors.Results: Of the 600 cases of thyroid nodules,519(83.47%) were benign and 81(16.53%) were malignant.Clinical symptoms and signs,ultrasonography and CT were all useful in indicating malignancy,especially ultrasonography,whose specificity and diagnostic accuracy were 93.3% and 84.2%,respectively.Multivariate logistic regression analysis revealed a higher rate of malignancy in younger patients with solid or hard nodules,or accompanied with calcification or painless adenophyma in the neck.Conclusion: Clinical symptoms and signs,ultrosonography and CT are of significant value in the diagnosis of malignant thyroid nodules.

Objective To establish the evaluation system and explore the possible impact factors for public interest nature in public hospitals. Methods One hundred and twenty-five public hospitals in Zhejiang Province were served as sample hospitals, and related data of year 2004 to year 2006 were collected. The Delphi expert investigation method, variation coefficient method and TOPSIS method were employed to screen the impact factors for public interest nature and build up the evaluation system for public hospitals, and stepwise regression analysis was conducted for possible impact factors of public interest nature. Results The evaluation system mainly included five aspects of quantity, quality, efficiency, mean charge of medical service and social satisfaction to public hospitals. The two most important factors that influenced the public interest nature were the number of beds and the number of equipments valued above 10 000 RMB. Conclusion The hospital scale is the most important impact factor for the nature of public interest in public hospitals. Therefore, the scale of public hospitals should be properly designed so as to ensure the public interest nature in public hospitals.

Angiogenidiseaseof the retinare the common reasonof several visual loss.Vasculaendothelial growth facto(VEGF) playan importanrole in pathologiangiogenesis.In recenyears,the developmenof anti-VEGF therapiehatransformed the prognosiof these conditions.The treatmenof angiogenidisease had entered an erof anti-VEGF therapy,especially in the treatmenof choroidal neovascularization (CNV) caused by age-related maculadegeneration (AMD).Abreakthrough,anti-VEGF therapy changethe photodynamitherapy (PDT) based weAMD (wAMD) treatmenmode.In thipaper,we describe thaeven though relegated to background,PDstill haclinical therapeutivalue fospecial circumstanceand certain type of CNV lesion,awell ain certain retindisease.