Medical metrology work is the base of quality control for hospital medical equipment.It guarantees the accuracy of hospital medical instruments.It is important to set up a complete management system for hospital metrology institutions.

AIM: To investigate the clinical effect of phacoemulsification and intraocular lens ( IOL ) implantation for cataract patients after corneal refractive surgery, and to compare the accuracy of the different refractive IOL.
METHODS:The data of 120 myopia cases (160 eyes) in our hospital, who underwent cataract surgery and corneal refractive surgery were analyzed. Corneal curvature K value before corneal refractive surgery were obtained and calculated by using history method. Corneal curvature correction numerical method and corneal topography were used to record K value of patients with incomplete data before and after treatment. The K value was substituted into the formula. By comparing the actual cataract surgery and refractive state expected refractive status (-0. 50D), the accuracy of IOL refractive obtained from three methods was compared.
RESULTS: The average best corrected visual acuity before cataract surgery was 0. 25 ± 0. 05, and it was improved ( 0. 80 ± 0. 05 ) after surgery. The average spherical equivalent (SE) was -1. 98±1. 75 before surgery and +0.85±3.38 after surgery (P<0.05). The K values of 48 cases were calculated by clinical history method ( CHM ) and that of 73 cases was calculated with the adjusted keratometry method ( AKM) . The K values of 39 cases were calculated using the corneal topography method ( CTM) .
CONCLUSION: For patients with corneal refractive surgery, the appropriate method can be selected according to clinical symptoms, history, etc. and this may help to accurately calculate IOL. For patients with complete data, CHM can be used to provide corneal K values, while for those with incomplete data, AKM and CHM can be used.

Objectives To explore the effects of control measures and dynamic prevalence of drinking water endemic fluorosis in China, to provide basis and technique support for endemic fluorosis control in China. Methods The survey was carried out according to the national surveillance Scheme of Endemic Fuorosis. The fulfillment of control measures and the quality of water improving projects were surveyed. Household water sample and urine of children aged 8-12 years were collected and fluoride content was detected by iron selective electrode method. Check the teeth of children aged 8-12 years. Dental fluorosis was diagnosed by Dean's method. Results projects were build in 84 endemic villages in 2006, and the average water improving rate came to 73.98% fluoride contents of half the surveyed spots were over the standard, mainly between 1.0-2.0 mg/L, and the urine controlled just in only few spots and it was in moderate or severe status in some endemic areas for many years. Conclusions Little progress of control measures in drinking water endemic fluorosis counties surveyed has been made in these two years. Projects of running out of status and over standard of water fluorosis are frequently seen. Dental fluorosis in many spots is not controlled.

Payment system reforms have become an important part of Chinese healthcare reforms, and global budget has been seen as a major trend. Based on the practice and data of four pilot hospitals in Beijing which have implemented the global budget, this paper focuses on analyzing the effects of implementation on the following aspects and provides references for policy improvements: medical services, average medical cost, total health expenditure, medical cost structure, average length of stay and out-of-pocket expense percentages.

Objective:To study the relationships between age,the state of genital tract and vaginitis,cervical erosion and vulvae leukoplakia in married women.Methods:Gynecologic inspection and laboratory examination were performed in 1 253 patients diagnosed vaginitis,cervicitis and vulvae leukoplakia in a women screen in a certain area in Chongqing in 2007.Statistics analysis was made by SAS8.1.Results:Of 1 253 patiens,45.89% had vaginitis,44.69%,cervical erosion,and 3.35%,vulvae leukoplakia,6.07%,the other conditions.Age,vaginal cleanness degree,candida infection were risk factors of vaginitis;Age,vaginal cleanness degree were related to cervical erosion and vulvae leukoplakia.Conclusion:Vaginitis,cervical erosion and vulvae leukoplakia should arouse more attention in the prevention and treatment of women genital tract disease in the future,and the standard etiology treatment should be performed to get microcosmic ecological balance.The perfect control and monitoring system for gynecologic disease should be established,and service quality of women health care should be improved.

Based on X86 architecture,a specialized software system was developed for liver teaching,imaging diagnosis and treatment.With MAYA as 3D modeling tool and DirectX3D as major virtual technology,a virtual liver model was created assisted by artificial intelligence and J2EE network communication.In addition,a virtual reality workstation about liver was established based on advanced modelling technology,human-computer interaction and database system to achieve a three-dimensional visualization of the liver on the virtual reality workstation.This system offers a feasible project for real-time chiri-cal consmlfation and teaching,and provides an extensive application of liver study under virtual condition.

The clinical data of 23 cases with emergent hematochezia endoscopically diagnosed as non-ulcerous duodenum diseases were retrospectively analyzed.Majority of cases were misdiagnosed and delayed to transfer to emergency room because of lack of knowledge and experiences of local medical workers.After referral to our emergency department,all 23 cases obtained appropriate management and cured successfully.

BACKGROUND: It has been verified vascular endothelial cells can propagate and differentiate into vessel by planted in the tissue-engineered material in vivo, but it may cause severe trauma when obtain vascular endothelial cells, and it has limited sources. OBJECTIVE: To investigate whether bone marrow mesenchymal stem cells (BMSCs) can differentiate into vascular endothelial cells by combined induction of vascular endothelial cell growth factor (VEGF), basic fibroblast growth factor (bFGF) and insulin-like growth factor (IGF)-1 by experimental observation. DESIGN, TIME AND SETTING: The control cell observation experiment was conducted at the Central Laboratory of First Affiliated Hospital, Liaoning Medical University from November 2006 to June 2007. MATERIALS: An 8-week-old Japanese big ear rabbit was used to isolate BMSCs. VEGF, bFGF and IGF-1 were purchased from Peprotech Company. METHODS: After anaesthesia, bone marrow was extracted from the rabbit. Enough BMSCs were harvested by adherence and trypsinization and randomized into two groups. BMSCs in the induction group were inoculated in DMEM supplemented with 10% fetal bovine serum (FBS), 10 ?g/L VEGF, 1 ?g/L bFGF and 2 ?g/L IGF-1 for 2 weeks. BMSCs in the control group were inoculated in DMEM containing 10% FBS. MAIN OUTCOME MEASURES: Morphological observation, nitric oxide (NO) content detected, immunohistochemistry staining of Ⅷ factor-related antigen and Weibel-Palade body under a electron microscope in BMSCs. RESULTS: Five days after induction, BMSCs were distributed in cluster, showing round. Non-induced BMSCs were evenly distributed, showing spindle or triangle. Fourteen days after induction, NO content in supernatant was significantly higher in the induction group than in the control group (t=3.75, P

BACKGROUND: Basic fibroblast growth factor (BFGF) widely in human tissue participates in trauma repair of various tissues and is one of wound healing factors in the body. OBJECTIVE: To summarize the progress of BFGF in the fracture healing. RETRIEVAL STRATEGY: A computer-based online search of Pubmed Database was undertaken to identify the relevant articles on BFGF in the fracture healing published from January 2000 to December 2007 with the Keywords of "fibroblast growth factor 2 (basic fibroblast growth factor), fracture healing, regulation, signal transduction" in English. At the same time, Chinese relevant articles were searched in China Journal Full-text Database (CJFD) and Wanfang Database published between January 2000 and December 2007 with the same key words in Chinese. Exclusive criteria included articles with repetitive research and non-original study. LITERATURE EVALUATION: A total of 33 articles were collected about the distribution (3 articles), biological characteristics (3 articles) and the effect on the healing of bone fracture (27 articles) of BFGF. DATA SYNTHESIS: Bone healing is the process of regeneration after bone injury and the process of bone formation. BFGF can promote the cell migration by its chemotaxis and accelerate the healing by aggregating mesenchymal stem cells, macrophage and fibroblasts towards trauma region. Present animal studies on BFGF are deep and reports on clinical application are a few. Thus, the effect of BFGF is available. BGFG can affect bone formation by adjusting cell prolifeation and differentiation and changing the synthesis of cell products. BGFG not only can promote the bone growth, but also enhance the adhesion of osteoblasts and scaffold. CONCLUSION: The distribution and biological characteristics of BGFG have been recognized primarily. The further study on modulatory mechanism in the fracture healing of BFGF is carrying through. The bone restoration compounded by BFGF and its carriers is in the experiment and needs to be studied further.

OBJECTIVE To compare the monitoring effect of 2 kinds of B-D testing package.METHODS 2 kinds of testing package around the air vent of first pot sterilizer before antiseptic every day were used preheating 5 min.Start to move the B-D procedure when the band pressure to achieve above 100 kPa with 3 time of pulsation vacuum,inner chamber pressure of 210 kPa,the temperature of 134 ℃ and time of 3.5 min.RESULTS Except the false negative caused by package factor,the testing accurate rate of disposable B-D testing package was 100%.But the testing accurate rate of repeated uses B-D testing package was 90%.CONCLUSIONS The disposable B-D test package may respond promptly the breakdown of sterilizer and avoid the false negative result which the artificial pack factor creates.The test result is accurate.The disposable B-D testing package for examination of autoclave exhaust cold air degree is obviously better than the self-made cotton fabric testing package.