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

Accidents, Traffic ; prevention & control ; Global Health ; Humans ; World Health Organization

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

Benzylisoquinolines ; therapeutic use ; Calcium Channel Blockers ; therapeutic use ; Combined Modality Therapy ; Humans ; Pneumoconiosis ; drug therapy ; Tablets

The importance of course arrangement and standardization construction for the course of hyperbaric oxygenation medicine was expounded in this review.In addition,the measures and experiences on textbook choosing,teaching content assignment,teaching methods designing,assessment means innovation and teaching personnel training were also discussed.The teaching system of the course of hyperbaric oxygenation medicine can be improved and references for thc dcvelopment of clinical hyperbaric oxygenation medicine courses can be provided through these measures.

Objective To study the reasons of minicholecystectomy complications.Methods 25 cases of minicholecystectomy complications among 1532 cases that have had an operation of minicholecystectomy were reviewed and the reasons resulting in those complication were analysed.Results In the 25 cases of minicholecystectomy complications,there is a bile duct injury in 5 cases,bleeding of gallbladder in 3,cardia guts reflection in 4,leakage of bile in 2,infection of incisional wound in 6,missed diagnosis gastric cancer in 1,missed diagnosis carcinoma of gallbladder in 2,microcholecyst in 2.Conclusion The major causes of the minicholecystectomy complications are minimal incision,worse exposure,minimal space operation and superdrag.

The evaluation of biomaterial biocompatibility is a key step before the clinical application.With the rapid development of molecular biology,scientists have begun to evaluate biomaterial biocompatibility at molecular level and proposed the concept of molecular biocompatibility.Researchers'main tasks at present are to identify more molecular markers using molecular biology technology and to establish standards for evaluating molecular biocompatibility of biomaterial,which will provide the guidance for the design of better biomaterials.

β-catenin is an important signaling transduetion and adhesion molecules.Mutation of the betacatenin gene,CTNNB1,is a common case in pediatric tumors,which may induce development and metastasis.In hepatoblastoma,48%have CTNNB1 mutation.In Wilms tumor,mutation only occurs in cases with WT1 gene mutation.In neuroblastoma,mutation is also found.