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.

The risk factors of traffic crash include drinking/drunk drive, accident proneness, fatigue driving, speeding, and poor vehicle quality. This article introduces the protection, emergency treatment, and basic scientific research of road traffic injury (RTI). As a public health issue, RTI is preventable, and personal factor is a key problem. It is important to establish an accurate and comprehensive RTI database, which may provide necessary information for the epidemiological research and crash prevention. The author also gives some suggestions on road traffic safety development in our country.
Accidents, Traffic ; prevention & control ; Databases, Factual ; Epidemiologic Research Design ; Humans ; Wounds and Injuries ; prevention & control ; therapy

Carcinoma, Hepatocellular ; surgery ; Hepatectomy ; Humans ; Liver Neoplasms ; surgery

C. Conclusion Adequate hemodilution can attenuate the lung injury induced by I/R. The protective effect is better if hemodilution is performed before I/R.

DNA double-strand breaks(DSBs) repair protein XRCC4,plays an important role in the genesis and development of tumor,there are many different aspects in the tumor genesis and development.This paper reviews the molecular mechanism of XRCC4 in repairing DSBs,several theories of tumor genesis and development,and the relationship between XRCC4 gene's single nucleotide polymorphisms(SNPs) and tumor.

Although the optimal treatment protocol for clinical N2-stage non-small cell lung cancer (NSCLC) is still uncertain, the recommended standard treatment protocol goes to radical concurrent chemora diotherapy. Concurrent chemoradiotherapy after induction chemotherapy is not superior to standard concurrent chemoradiotherapy. Neoadjuvant concurrent chemoradiotherapy followed by pulmonary lobectomy can improve overall survival ratio comparaed with preoperative neoadjuvant concurrent chemoradiotherapy. The role of concurrent chemoradiotherapy followed by consooldation chemotherapy is still controversial. Gefitinib or erlotinib failed to bring about the survival benefit from the maintenance treatment after concurrent chemoradiotherapy. Prophylactic cranial irradiation play a role merely in decreasing the risk of brain metastases, but not in the improvement of overall survival.

Objective To investigate the methods to repair the defection of finger tip.Methods During Feb.2004 to July 2008,in 98 cases,23 fingers were reconstructed with 2nd toe transfer which was reformed with digital flap or trilobed flap from 2nd toe,33 fingers were coverd with wrap around flap or half wrap around flap from great toe,or combined wrap around flap from great with pulp flap from 2nd toe,28fingers were repaired with fabular flap from great toe combined with tibial flap from 2nd flap,and 27 fingers were repaired with nail flap or enlarged nail flap from great toe. Results Vessel articulo took place in 5 cases,and all cases recovered with wonderful outward appearance Conclusion Microsurgical technic is an ideal method to repair the finger-tip defection.

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.