Objective To identify the effective traction conditions by comparing the effects of traction forces on the intervertebral disc under various mechanical conditions. Methods A three dimensional finite element model was used to carry out mechanical analysis of the traction under conditions with different forces and angles, then to carry out the comparative analysis of the stress distribution and the change of the volume of the intervertebral disc. Results In general, the stress distribution on the intervertebral disc was not even under different traction forces, The maximum stresses appeared at the back rim of the intervertebral disc. With the increase of the traction force and angle, the enlargement of the intervertebral disc volume increased, and the enlargement rate was more significant. Conclusion The volume of the intervertebral disc can be most effectively enlarged at the condition of 30?forward bending of the neck when a force of 90N was applied. This is the most effective traction condition.

Objective:To prepare an acellular matrix from trachea of rabbits and SD rats, and to investigate its biocompatibility.Methods: A modified detergent and enzyme link extraction procedure was performed to remove cells from the trachea of SD rats and rabbits. The histology, topography of inner-surface and biocompatibility were studied by morphological observation,cell culture and in vivo transplantation respectively.Results:The acellular trachea matrix did not inhibit the growth and amylase secretion of allogenic salivary gland cells cultured on it.The allogenically transplanted acellular trachea matrix did not result in inflammation reaction of the host tissue,could integrate with surrounding tisses.Conclusion:The acellular trachea matix is biocompatible.

s Objective: To study the feasibility of allogeneic tra ns plantation of myoblasts of SD rats for the reconstruction of facial muscle de fects. Methods: Myoblasts obtained from the forelimbs and hindlimbs of neonatal SD rats were purified and cultured. 5?10 4 myoblasts w ere seeded onto each of type Ⅰcollagen sponges in the size of 1.5 mm?0.8 mm? 0.5 cm. The myoblasts/sponge constructs were transplanted into the facial muscl e defects of syngeneic mutured rats and observed with microscopy,immunohistoche mistry and electromyography (EMG).Result:Myoblasts attac hed and kept alive on type I collagen for at lest 3～4 days in culture. 4 and 8 w eeks after transplantation,muscle like tissue with blood vessles was observed i n the implants. Expression of actin and myosin in the implants was similar to th at in the control muscle.8 weeks after implantation,the spike wave (mV) on the g rafted side and control side was 0.7?0.3 and 2.7?0.6 ( P

Objective:To study the effects of isoproterenol(Iso) on the proliferation of cultured submandibular gland cells of SD rats. Methods:Submandibular gland cells of SD rats were primarily cultured. The cells were exposed to Iso at 10 -3 g/L continuously for 8 days or intermittently(2 h each day for 8 days). The cell proliferation was sutdied by bromodeoxyuridine Brdu labeling and cell counting.Results:Iso increased cell proliferation(P

Objective The aim of this study was to investigate the correlation of serum copper levels and mental health in psychiatric shift nurses.Methods The participants were divided into day shift nurses(control group,n=60) and night shift nurses(n=60).The concentrations of trace mineral,serum biochemical levels,inflammatory and oxidative markers in blood samples of 120 shift nurses were measured.The depressive mood was measured with second edition of Chinese version of the Beck Depression Inventory,(BDI-Ⅱ).Results The night shift nurses showed moderate-to-severe depression levels,which were significantly higher than those of the day shift nurses,23.3％ (14/60) and 11.7％ (7/60) vs.6.7％ (4/60)and 1.7％ (1/60),x2=6.536,4.82,P ＜ 0.05.Night-shift nurses also had higher levels of serum copper,hs-CRP,IL-6,T-SOD and Cu-Zn SOD than the control group,(19.57±4.14) μmol/L vs.(18.03±3.20) μmol/L,1.32(0.78-1.89) rng/L vs.0.89(0.45-1.44) mg/L,68.54 (51.43-96.78) ng/L vs.56.39 (35.56-78.71) ng/L,(66.78±14.72) kU/L vs.(47.32±17.84) kU/L,(54.22±14.91) kU/L vs.(48.17±17.23) kU/L,t=-3.133～-2.057,P ＜0.01 or 0.05.BDI-Ⅱ scores correlated positively with serum copper,hs-CRP,IL-6,T-SOD and Cu-Zn SOD,r=0.248-0.457,all P ＜ 0.01.In night shift group,multivariate regression analysis showed that serum copper,hs-CRP,IL-6 and T-SOD (β=0.097-5.340,P＜ 0.01 or 0.05) were independently related factors influencing BDI-Ⅱ scores (R2 =0.609,P =0.000).Conclusions Serum copper may serve as an evaluation index for depressive mood in psychiatric shift nurses,and serum copper concentrations in night shift nurses should be monitored regularly.Clinical Trial Registry Chinese Clinical Trial Registry,ChiCTR-OOC-14005540.

0.05). Conclusions DTI is valuable in assessing the directionality and density of white matter and can reflect the age-related physiological changes of white matter in vivo non- invasively.

One patient with congenital epidermolysis bullosa combined with pachyonychia was reported, and followed up for 11 years. The pedigree of the patient was investigated, and the loci of HLA-A, B antigens of 16 members of the pedigree were determined. The results showed that there were 60 members in the pedigree, among them 24 members had different kinds of skin diseases : 4 cases of epidermolysis bullosa combined with pachyonychia, 9 eases of albopapuloid form of epidermolysis hullosa combined with pachyonychia, 2 cases of icthyosis and 9 cases of pachyonychia simplex. The result of HLA-A, B antigens analysis of 16 members of the pedigree showed no evidence of the genes of these patients linked with HLA-A, B antigens.

Objective To explore the polymorphism distribution of the hormone-sensitive lipase (HSL) gene i6 in Zunyi region. Methods HSL i6 in the Zunyi population was examined with ploymerase chain reaction-single strand conformation polymorphism (PCR-SSCP), and analyzed for its distribution. Results Six different alleles and 11 different genotypes were found in the HSL i6. The PIC is more than 0.7, in which allele 6 and allele 7 were most widely distributed. Conclusion The polymorphism of HSL i6 was identified and the result suggests in Zunyi HSL as a candidate gene of glucose and lipid metabolism.

Objective To explore the effect of continuous subglottic irrigation and aspiration in patients with artificial airway. Methods One hundred and twenty-eight patients with mechanical ventilation were randomly divided into observation group and control group with 64 cases in each group.The observation group was treated by continuous subglottic irrigation and aspiration,and the control group received traditional nursing.The two groups were observed and compared in terms of incidence of aspiration and ventilator-associated pneumonia.Result The incidences of ventilator associated pneumonia(VAP)and aspiration in the observation group were significantly lower than that in the control group(P<0.05).Conclusion Continuous subglottic irrigation and aspiration can effectively prevent aspiration and VAP among patients with artificial airway.

Radiotherapy is an importment local treatment for non-small cell tung cancer. In recent years,with the development of molecular biology and radiotherapy technique and the update of equipment,radiation pattern with different doses segmentation and the concept of the combined therapy including radiotherapy and chemotherapy have been applied in clinic gradually,which get better effects.