Neck lumbar traction bed is through the computer control motor and hydraulic transmission device, implementation of traditional Chinese medicine traction, Angle rotation and manual reduction action of a device, etc. Saving time and effort can well meet the needs of the treatment on lumbar disease. Based on the failure phenomenon of traction bed hydraulic transmission device, the composition and working principle analysis of the hydraulic system, concluded that failure of the hydraulic transmission device is due to the pressure gauge damaged or blocked between the tubing and the overflow valve, which allows users to quickly troubleshoot.

With the improvement of living standard, the requirement of artificial joint material is ever increasing. The development of meted artificial joint, high polymer artificial joint and ceramic-made artificial joint, which are widely used in joint replacement, are introduced. Advantages and disadvantages of these materials are discussed, as well as the required improvement to these three materials. Development on metal-to-metal hip resurfacing arthroplasty and its clinical application is introduced. Now that no material with good biocompatibility, good biomechanical compatibility, good biological aasociativity and satisfied life-span has yet been found, compound material artificial joint may be the focus of the research in future.

Moyamoya disease is an uncommon chronic progressive occlusive cerebrovascular disease.It is mainly involved in the terminal internal carotid artery and the proximal portions of the anterior cerebral and middle cerebral arteries.Normally,there are differences between the conventional angiographic findings and the clinical manifestations and outcomes in moyamoya disease,while the perfusion imaging can provide important hemodynamic information.Currently,CT perfusion imaging and magnetic resonance perfusion imaging have been widely used in clinical practice.This article reviews the application of the two imaging techniques in moyamoya disease.

Objective To investigate the effects of compound danshen dripping pill (CDDP) on carotid intima￣media thickness (CIMT) and cardiac function in patients newly diagnosed as hypothyroidism. Methods The total of 40 subclinical hypothyroidism patients and 40 hypothyroidism cases was enrolled.The clinical hypothyroidism patients were treated with L￣T4 as the conventional treatment, and comprehensive CDDP plus levothyroxine (L￣T4 ) as treated groups (CDDP group) for 6 months. The therapeutic effect was evaluated by combining with data of thyroid function, blood lipid profile and ultrasound.The 40 healthy subjects were chosen as normal control group. Results Compared with normal control group, the levels of TC and LDL￣C were higher (P<0.05) in subclinical hypothyroidism group, which were more obvious in the clinical hypothyroidism group (P<0.01), CIMT increased markedly (P<0.05), the left ventricular systolic functions (ejection fraction) and diastolic functions (mitral flow velocity E and A wave ratio) were markedly decreased (P<0.05) in the clinical hypothyroidism group.Upon treatment, the blood￣lipids were improved (P<0.05), CIMT were reduced (P<0.05), the left ventricular functions were restored to near normal with the attainment of euthyroidism in both groups of clinical hypothyroidism;the reduction of CIMT and the improvement of the left ventricular functions were faster in CDDP group than that in the conventional treatment group (P<0.05). Conclusion Disturbance of blood lipid in hypothyroidism patients, CIMT growth and impaired left ventricular function objectively indicate the existence of cardiac and cerebral vascular risk, while CDDP helps improving lipid metabolism, reversing CIMT and cardiac function, reducing cardiovascular risk, blocking or delaying cardiovascular event chains.

It is important to analyze the epidermal growth factor receptor ( EGFR) mutation before makingstrategyonnon-small cell lung cancer ( NSCLC) patients scheduled to EGFR tyrosine kinase inhibitor ( TKI) therapy .Digital PCR is a new generation of molecular diagnostic technique that provides ultra-highersensitive, specific and absolute nucleic acid quantification based on its unique principle.The application of digital PCR indetecting circulate tumor DNA can be the truly tumorliquid biopsy, helps to acquire the accurate EGFR mutation status from peripheral blood and screen out the most appropriate patients for TKI therapy.This breakthrough technology will also contribute to tumor surveillance and drug resistance monitoring.

Objective To explore effect of miR‐302a on proliferation and apoptosis in folate deficiency mouse embryonic stem cell (mESC) .Methods The cases were divided into complete culture medium group (control group) ,folate‐deficient culture medi‐um group (folate‐deficient group) ,folate‐deficient culture medium plus miR‐302a mimic group (miR‐302a group) .The expression of miR‐302a was examed by RT‐PCR in control group and folate‐deficient group .To construct miR‐302a mimic and then was trans‐fected into the folate‐deficient culture medium mESC .Effect of miR‐302a mimic on mESC viability was detected by MTT assay ,the effect of miR‐302a mimic on mESC apoptosis was examed by Annexin V‐FITC/PI flow dual‐staining method ,the effect of miR‐302a mimic on mESC cycle was examed by flow cytometry .The activation of phosphatidylinositol 3 kinase (PI3K)/protein kinase B (AKT)/mammalian target of rapamycin (mTOR) and expression of CyclinD1 ,p21 and p27 was assayed by Western blot . Results The expression of miR‐302a was lower in folate‐deficient group(P<0 .01) .Compared with control group ,the viability of mESC was lower ,the apoptosis of mESC was higher ,the cell cycle was arrested in G1 phase ,the level of phosphorylation of AKT and mTOR was lower ,the expression of CyclinD1 was lower ,the expression of p21 and p27 was higher in folate‐deficient group , with statistical significance (P<0 .01) .Compared with folate‐deficient group ,the viability of mESC was higher ,the apoptosis of mESC was lower ,G1 phase was shortened ,the level of phosphorylation of AKT and mTOR was higher ,the expression of CyclinD1 was higher ,the expression of p21 and p27 was lower in miR‐302a group with statistical significance (P<0 .01) .Conclusion These results suggested miR‐302a exerted anti‐apoptosis and promote cell proliferation in folate‐deficient culture medium ,which might be related to PI3K/AKT/mTOR signal pathway .

BACKGROUND:Effects of pedicle screw placement on fracture reduction or stability of mechanics are influenced by various factors. Pedicle screw fixation failure is mainly due to fracture, loosening and fatigue. The main influential factors for biomechanical stability of pedicle screw are length and diameter. The research on the depth is less. OBJECTIVE:To analyze the relationship between pedicle screw placement depth of vertebral body and the fixed stability based on the biomechanics. METHODS: A model of single vertebral compression fractures was made in 15 pigs aged 5 months on L2 vertebral specimen. According to the length of anteroposterior diameter, vertebral pedicle screws were inserted in different depths (80%, 90% and 100% of anteroposterior diameter). After fixation, specimens were loaded 10 000 times at the frequency of 0.5 Hz (340±125) N on a WDT-10KN type universal material testing machine. Ranges of motion at anteflexion, backward extension, left bending and right bending and the maximum axial pulout force were measured in each group, and the difference of intergroup data was compared. RESULTS AND CONCLUSION:(1) Ranges of motion at anteflexion, backward extension, left bending and right bending in each group were significantly smaler in the 100% and 90% groups than in the 80% group (P < 0.05), and above parameters were smaler in the 100% group than in the 90% group (P< 0.05). (2) After fatigue test, the maximum axial pulout force was significantly larger in the 100% and 90% groups than in the 80% group (P< 0.05), and above data were significantly larger in the 100% group than in the 90% group (P < 0.05). (3) Results indicate that the depth into the vertebral body was significantly associated with its fixed stability. The deeper the depth into the vertebral body, the stronger the vertebral stability was: 100% group > 90% group > 80% group.

[Objective]To explore the professor Yu Tugen’s experience, in order to provide reference for clinical medication and the study of atopic der-matitis. [Methods] Treatment based on syndrome differentiation. First, through the analysis of etiology and pathogenesis and clinical manifestations of atopic dermatitis, it is divided into types, respectively analyze each type, discuss the experience in the treatment of various types; then give examples of the treat-ment experience of dampness heat syndromes, analysis of diagnosis and treatment system.[Result]Atopic dermatitis is divided into the types of damp-heat accumulation, spleen deficient aggregates the skin wet, wind formation from blood deficiency. After dialectical treatment, symptom is relieved.[Conclusion] This topic comprehensively summarizes the famous expert Yu Tugen ’s academic thought and clinical experience of atopic dermatitis of the types of damp-heat accumulation, provides a more complete treatment concept based on syndrome differentiation of TCM of atopic dermatitis, to relieve pain and improve the quality of life.

Background and Purpose:To analyse the chromosome of peripheral lymphocytes and tissue samples of lung cancer for the long term survival patients after surgery,which could provide the rationale for the screening of relative genes of carcinogenesis and clinical treatment of lung cancer.Methods:Twenty patients with over 5 year survival after operation were defined as long term survival group.There were 9 patients with squamous cell carcinoma,6 with adenocarcinoma and 5 with small cell carcinoma in the long term survival group.The control group was defined as the samples from the patients with lung cancer who had surgery within one year and had to be randomly chosen,8 patients were histologically proven as squamous cell carcinoma,7 as adenocarcinoma and 5 as small cell carcinoma in the control group.The samples from healthy donors were defined as the normal group.The chromosome variations of peripheral lymphocytes in all these 3 groups were analyzed by routine methods.The comparative genomic hybridization of the embed-paraffin tissue sample of lung carcinoma was done by the DeVries methods.Results:In the long term survival group,the chromosome variations rate of lymphocytes was 3.15%,which was lower than that of the control group(3.15% vs 10.85%,P

Objective To investigate the image profiles and pathological manifestations of lung damages induced by Bleomycin(BLM) or pneumococcus,and to further elucidate the characteristic image profiles and its pathologic basis of pulmonary fibrosis.Methods 90 SD ratswere divided randomly into BLM group,pneumonia group and control group,the models were made by intratracheal instilling of BLM,pneumococcus and saline respectively.At the different time,HRCT scans were performed in all rats.The pulmonary specimens of rats were observed on pathology.Results Images of concentrated density in lung was observed in both BLM and pneumonia groups in early stage.In BLM groups,the areas of concentrated density image mainly surrounding main bronchus,were larger than that of pneumococcal pneumonia groups.And the images of fibre were seen in lungs of BLM-treated rats in 7 days.The correlation-observation of pathology showed,a lot of neutrophil and macrophages infiltrating in lungs of both groups,with a lot of exudates in the alveolus in pneumococcal pneumonia groups.Otherwise,the hyperplasia of fibroblasts was observed in the lung interstitium in the 5-7 day groups treated by BLM.Conclusion The imaging findings of alveolitis caused by BLM is of some different characteristic in comparison with that caused by pneumococcus.