This article analyses and summarizes the clinical maintenance work of Elekta Precise Linac in five years.Afer the further research on its performances and errors,a better way is found to solve the main problem of clinical electronic linac,i.e.the way to reduce the Stop Rate of Linac in Radiotherapy.

Disaster Medicine ; Earthquakes ; Emergency Medicine ; General Surgery ; Humans ; Relief Work ; Wounds and Injuries ; surgery

As a regular mental disease,Hypochondriasis more takes place on medical students.It affects seriously the undergraduates both physically and mentally,and disturbs their life and studies.If proper enlightenment and treatment are not given to the students,hypochondriasis may possibly evolve to neuropathy and psychoses,leading to the prolonged and refractory diseases.Therefore by psychoanalyzing medical students' hypochondriasis and discussing how to prevent its occurrence,we put forward that it is important to build the students' psychological character and personality characteristics in cultivating the students' clinical thinking ways and basic practice ability.

Objective:To solve the management problems of using mobile cart, PDA, flat-panel computer and other mobile devices in hospital, promote the evolution of mobile device management to intelligent management. Methods: Select the mobile device management system for hospital use based on their own characteristics.Results: Manage all the mainstream operating system and terminal equipment; manage the hardware and software of mobile terminal and assets in hospital.Conclusion: Improve the management, reduce the maintenance workload, save the cost of operation and maintenance.

CD4 +T cells from patients with human immunodeficiency virus (HIV) infection undergo apoptosis at an enhanced rate, which leads to immune system damage and invalidation to withstand the virus intrusion. The current antiviral drugs aim at the virus can not clear the chronically infected cells which are the virus reservoirs. But treatment of HIV/AIDS patients with the HIV protease inhibitors (PIs) can reduce the cell apoptosis induced by HIV infection, which can improve immune function, and that is separate from the antiviral effects of PIs. Such suggests that immune reconstruction is a new strategy to cure AIDS. This text reviews HIV PIs research and development, their function characteristics and the effects on cell apoptosis. To define the relationship between HIV PIs and cell apoptosis may inspire new ways of curing the AIDS.-

Objeotiver To discuss the diagnosis and treatment of primary testicular tumors in children. Methods Thirty twe patients who underwent treatment of primary testicular tumors in children between 5 months and 12 years from 1993 to 2003 were retrospectively reviewed. Frozen section pathological examination during in operation was done in all the patients. Depending on it, testicle sparing surgery or radical orchidectomy was performed accordingly. Twenty patients with malignant testicular tumors under went chemotherapy after surgery. Results There was no contradiction between the findings of paraftin section pathological examination and frozen section. The average follow up period in 24 patients was 73 months (ranged from 5 months to 7 years). Four patients with yolk sac tumor died of distant metastasis of the tumor in 1 year after surgery. Others were alive without tumor for 4 months to 7 years. Conclusious Ultrasonography was valuable for the diagnosis of the primary testicular tumor. Surgery should be the treatment of first choice. It was important to send for frozen section pathology during operation. According to frozen section findings, it could be decided whether the testis could be spared, which is of importance in regard to aesthetics, psychology and function for children with benign testicular tumors. Postoperative chemotherapy was beneficial in raising surrival rate in children with malignant tumors in whom the prognosis was poor

This review discusses several strategies that have been employed to enhance the regenerative effectiveness of artificial nerve guidance channels. These strategies include the use of scaffolds, the integration of contact-mediated cues within the tubular construct, and incorporation or delivery of exogenous growth factors into the conduit lumen uniformly or in a gradient form. Animal and clinical studies are reviewed to explain some of the ideas involved in developing a guidance channel of the future.

OBJECTIVE To consummate the measures of prevention and control of HIV in order to effectively guard medical personnel against being infected with HIV during occupational exposure.METHODS Make a survey of the constitution of 35 medical personnel in our hospital who had directly contacted and exposed to HIV sufferers,and the main approaches of their exposure and treatment taken after exposure.RESULTS The rate of occupational exposure has reached as high as 77.78%,mainly through the skin exposure due to skinhurt.Medical personnel usually didn′t attach much attention to the potential danger of exposure,and had low capability of occupational protection.CONCLUSIONS The education of occupational safety must be strengthened,and the measures of occupation be consummate protection in order to decrease the occupational exposure of medical personnel.

The spectrum of glomerulonephritis differs in different countries and areas all over the world,and changes with socioeconomic progression. Recent researches have shown that the difference and change of the spectrum of glomerulonephritis are correlated with Th1 and Th2 immune responses."Hygiene hypothesis" is also proposed.