Objective Distortion product otoaconstic emission (DPOAE) was compared withauditory brain－stem response (ABR) in the early diagnosis of gentamicin (GM) ototoxicity. Whetherimpaired hearing could be improved with the glutathione treatment after its withdrawl of injection.Methods40 guinea pigs with normal hearing were randomly divided into 4 groups, 10 in DPOAEgroup, 12 in ABR I group (the usage of GM was stopped when abnormal shift presented in ABR), 12 inABR Ⅱ (group glutathione was injected for 5 after the usage of GM had been stopped), 6 in controlgroup. The guinea pigs in experimental group were injected with GM 100mg/kg per day, while those inthe control group were injected with saline. The DPOAE and ABR were monitored to observe the ampli-tude and the threshold of wave IV. The morphological changes of hair cells were also observed after injec-tion of GM had been stopped for 2 weeks. ResultsIt was averaged at 7d after the injection of GMwhen the changes presented in DPOAE group, while 10d in ABR group. The threshold shift increasedafter the injection had been stopped for 2 weeks in ABR Ⅰ group ( P <0.01) ,while there was no obvi-ous shift in ABR Ⅱ group. The morphological and functional changes of the hair cells were almost thesame. Conclusion GM ototoxicity could be more sensitively observed by DPOAE than ABR. Glu-tathione could prevent further ototoxic effect of GM to the cochlear.

Objective To apply the IQM quality data of the GEM 3000 blood gas analyzer to evaluate the instrument performance and to compared it with the traditional evaluation method .Methods The precision and accuracy were calculated by using the IQM data ,the external quality control substance was adopted to verify the main performance indexes of the blood gas analyzer .Results The precision of PH ,PCO2 and PO2 calculated by using the IQM data was 0 .02% ,2 .16% and 0 .63% ,which by the traditional e-valuation method was 0 .07% ,1 .68% and 1 .28% respectively ,the accuracy of PH ,PCO2 and PO2 calculated by using the IQM data was 0 .00% ,1 .15% and 0 .49% ,which by the traditional evaluation method was 0 .11% ,2 .91% and 1 .07% respectively .Conclu-sion The intelligent quality management can provide objective and reliable indicators for the performance evaluation of the blood gas analyzer ,and compared with the traditional performance evaluation scheme which is more simple and convenient to operate .

Objective To study the cumulative radiation dose of multiple trauma patients during their hospitalization and to analyze the dose influece factors.Methods The DLP for CT and DR were retrospectively collected from the patients during June,2009 and April,2011 at a university affiliated hospital.The cumulative radiation doses were calculated by summing typical effective doses of the anatomic regions scanned.Results The cumulative radiation doses of 113 patients were collected.The maximum,minimum and the mean values of cumulative effective doses were 153.3,16.48 mSv and(52.3 ± 26.6) mSv.Conclusions Multiple trauma patients have high cumulative radiation exposure.Therefore,the management of cumulative radiation doses should be enhanced.To establish the individualized radiation exposure archives will be helpful for the clinicians and technicians to make decision wheather to image again and how to select the imaging parameters.

Objective To study the antagonism of taurine-zinc coordination compound (TZC) to the adverse effect of mercury (Hg) on the neurons in the cerebral cortex. Methods 32 male Wistar rats aged 21days were randomly divided into 4 groups, one control group (fed on distilled water), three experimental groups fed on HgCl2 (0.06 g/L), HgCl2+0.23 g/L TZC and HgCl2+0.46 g/L TZC respectively, treated for one month. The NOS activity in the cerebral cortex neurons was determined by NADPH-d histochemistry. Results NADPH-d positive neurons increased in HgCl2 group (P

Endoscopy ; Humans ; Myringoplasty ; Tympanic Membrane ; Tympanic Membrane Perforation ; surgery ; Wound Healing

Objective:To study the sleep conditions, the prevalence of insomnia and the treatment problems in Jinuo People.Methods: 126 Jinuo People were investigated with “questionnaire of sleep conditions" which was designed for this study. Results: Sleep duration of Jinuo people decrease as they get old. The rate of siesta in people under 30-year-old was significantly higher than that of over 30-year-old. Among 126 Jinuo people,43 suffered from insomnia (34.12%). Psychiatric diseases(41.86%)and alcohol dependence(30.23%) were the two most common causes of insomnia. Among the patients with insomnia, 11(25.58%) sought for treatment. Conclusion: Compared with the general population, the prevalence of insomnia in Jinuo people was relatively higher. In view of the sampling bias and small sample, this results need to be validated by further study.

Objective To investigate the expression of extracellular signal-regulated kinase 1/2(ERK1/2) and transforming growth factor ?1(TGF-?1) in heart of spontaneous hypertensive rat.Methods The expression of ERK1/2 and TGF-?1 was determined by immunohistochemistry and Western blot.Results In arteriole of the heart of 8,16,and 20 week-old SHR,the rate of positive ERK1/2 staining at the endothelium(15.38%,76.97% and 72.72%,respectively) and at the vascular smooth muscle cell(VSMC) of 16 and 20 week-old SHR(5.49% and 6.83%,respectively)were significantly higher than that of control group(P

Objective To identify the factors related to the influence of medical research papers. Methods The influence of 1146 research papers by the hospital in the period 1996-2003 and its relationship with such factors as the backgrounds of the authors and the quality of the papers were studied u-sing regression analysis. Results Nine factors, including the impact factor, the status of the paper (being or not being one based on fund-supported research or representing research achievements), and the status of the author (being or not being chosen for talent cultivation and undertaking or not undertaking research projects), were significantly correlated with the influence of the papers. Conclusion In order to enhance the influence of medical research papers, it is necessary for research' management departments not only to encourage research personnel to publish papers in journals with high impact factors but also to step up efforts to better personnel cultivation, degree education, and project and achievement management so as to set up a quality and distinguished research contingent.

Objective To observe the expression of Toll-like receptors (TLRs) 2,4 and 9 in lesions of lupus vulgaris and tuberculosis verrucosa cutis,and to evaluate the possible roles of these receptors in the pathogenesis of cutaneous tuberculosis.Methods Skin specimens were obtained from the lesions of 18 patients with clinically and pathologically diagnosed lupus vulgaris or tuberculosis verrucosa cutis,15 patients with plaque-type psoriasis (positive control),and from perilesional normal skin of 10 patients with pigmented nevi (negative control).Immunohistochemistry was used to detect the expression of TLRs 2,4 and 9 in these specimens,and the expression intensity was expressed as absorbence values.Data were analysed by using the SPSS 13.0 software,and t test was conducted to assess the differences between the three groups of specimens.Results TLR-2 was observed mainly in the middle and upper layer of epidermis in lesions of cutaneous tuberculosis and psoriasis,and in the whole epidermis except the basal layer in normal skin,with no significant difference in the expression intensity between the three groups of specimens (0.25 ± 0.04 vs.0.25 ± 0.05 vs.0.28 ± 0.03,P ＞ 0.05).TLR-4 was weakly expressed in cutaneous tuberculosis lesions,absent or slightly expressed in normal skin and psoriatic lesions,and the expression level of TLR-4 was significantly higher in cutaneous tuberculosis lesions than in normal skin and psoriatic lesions (0.16 ± 0.07 vs.0.07 ± 0.09 and 0.02± 0.05,t =2.58,6.24,P ＜ 0.01 and 0.05).TLR-9 was expressed in the whole epidermal layer,including appendages and vascular walls,of cutaneous tuberculosis and normal skin,with a significant increase in cutaneous tuberculosis than in the normal skin (0.25 ± 0.05 vs.0.19 ± 0.05,t =2.88,P＜ 0.05).Conclusions TLRs 2,4 and 9 are all expressed in cutaneous tuberculosis losious,and the expression intensity of TLR-4 and TLR-9 is higher in cutaneous tuberculosis lesions than in normal skin,hinting that TLR-4 and TLR-9 play a certain role in the immune response of cutaneous tuberculosis.

BACKGROUND: There have been no effective means for clinical treatment of large regions of bone defects.Nano-hydroxyapatite/collagen(nHAC)composite would provide a new pathway for repair of bone defects owing to its similar structure to natural skeleton and better biocompatibility.OBJECTIVE: To investigate the role of nHAC composite co-cultured with bone marrow-derived mesenchymal stem cells(BMSCs)in repair of bone defects.METHODS: Following isolation and culture,human BMSCs were co-cultured with nHAC composite.Gross observation,histological analysis,and electron microscope observation were performed to analyze osteogenesis for repair of bone defects in the clinic.RESULTS AND CONCLUSION: Human nHAC could greatly proliferate in vitro.X-ray photography revealed that bone defects well healed after implantation of nHAC/BMSCs composite.These findings indicate that BMSCs exhibit osteogenic potential and nHAC is a satisfactory scaffold material for construction of tissue-engineered bone.