Objective To establish a modified method to evaluate the protection of the antioxidant of DNA damage induced by hydroxyl radical. Method Reaction mixture at a final volume of 1.0 ml contained 0.8mg/ml DNA,0.2 mmol/L H2O2,1.0 mmol/L ascorbic acid,in 50 mmol/L NaH2PO4-Na2HPO4 buffer (pH 7.4). EDTA(1.0 mmol/L) and FeCl2 (1.0 mmol/L)were premixed and then dispensed into the reaction mixture to trigger the Fenton reaction,and the mixture was incubated at 37℃ for 30 min. The reaction was stopped by dispensing 1ml of 10% (w/v) trichloroacetic acid ,and reaction mixture was mixed with 1ml of 1% (w/v) 2-thiobarbituric acid,then further heated at 80 ℃ for 30 min. The chromogen formed was extracted into n-1-butanol and absorbance was measured at 532 nm. Results Addition of hydroxyl radical scavenger can compete with DNA for the hydroxyl radicals and diminished TBARS formation at a defined time of reaction with dose-dependent effect. The result showed that hydroxyl radical scavenger exerted inhibition effects on hydroxyl radical-mediated DNA damage. Conclusion This method can be used to evaluate the protection of the antioxidant of DNA damage induced by hydroxyl radical.

Objective To compare levels of glycosylated hemoglobin detected by 3 kinds of analytic instruments .Methods 75 samples were measured by D-10 glycosylated hemoglobin automatic analyzer(ionexchange chromatography) ,HA-8160 glycosylated hemoglobin automatic analyzer(affinity chromatography) and 7170A automatic analyzer(immune turbidimetry) .Results were tested by the homogeneity of variance ,the one-way analysis of variance and correlation analysis .Results There was a positive correlation between D-10 glycosylated hemoglobin automatic analyzer and HA-8160 glycosylated hemoglobin automatic analyzer(r2 =0 .996) , the linear equation was Y=0 .953X+0 .519 .There was a positive correlation between D-10 glycosylated hemoglobin automatic ana-lyzer and 7170A automatic analyzer(r2 =0 .996) ,the linear equation was Y=0 .925X+0 .576 .There was a positive correlation be-tween HA-8160 glycosylated hemoglobin automatic analyzer and 7170A automatic analyzer(r2 =0 .998) ,the linear equation was Y=0 .969 X+0 .081 .Conclusion In the premise of quality control in laboratory ,three different instrument can use to detect the level of glycosylated hemoglobin .

OBJECTIVE: To investigate the correlation between tongue body MRI measurements and the lingual region obstruction in patients with obstructive sleep apnea hypopnea syndrome (obstructive sleep apnea hypopnea syndrome, OSAHS), and the relationship of two diagnosis methods in positioning obstructive level, in order to improve the preoperative diagnostic accuracy of obstructive level in OSAHS patients . METHOD: Fifty-nine patients with OSAHS definited by the AG200 sleep apnea monitoring and obstruction plane positioning system was included. They all underwent tongue MRI scan, after three-dimensional reconstruction, the tongue body length to diameter, relative thickness, basal diameter, wide around central about wide diameter and tongue body volume were measured. The lower blocking (mainly composed of lingual region) constituent ratio P established by AG200 was correlated with tongue parameters measured by MRI. At the same time, To analysis of differences of P in patients with different degree of OSAHS. RESULT: Among these patients with OSAHS in different degree, the coefficient correlation between tongue parameters(tongue length, relative thickness, basal diameter, wide middle diameter, tongue body volume) and lower blocking constitute ratio P werer LP = 0.051,rHP = 0.069, r1 = 0.215, r2 = 0.147, rVP = 0.259, respectively. lower obstruction of form than the differences had statistical significance. The measured tongue parameters and value P(the lower blocking constituent ratio) were negatively correlated, which demonstrated that exclusing of the larynx and hypopharynx airway obstruction, the lower airway obstruction detected by AG200 was related with tongue parameters measured by MRI, and was strongestly related with the tongue body volume. CONCLUSION The volume of tongue and AG had correlation in judgement of lower blocking. In OSAHS patients the lower blocking constituent ratio varies between the defferent severity groups of the disease, the combina tion of the two method can be used to predict the obstructive plane in OSAHS patients with upper airway obstruction, and provide the basis for the individual treatment of patients with OSAHS.
Airway Obstruction ; complications ; Humans ; Imaging, Three-Dimensional ; Magnetic Resonance Imaging ; Sleep ; Sleep Apnea, Obstructive ; diagnosis ; Tongue ; pathology

Objective: To explore the relationship between family intergenerational contact, depressive symptoms and self-rated health status in the elderly, so as to provide insights into promoting health of the elderly and actively coping with population aging. Methods: Demographic information, intergenerational contact frequency, self-rated health status and depressive symptoms in the elderly at ages of 65 years and older were collected through the Chinese Longitudinal Healthy Longevity Survey (CLHLS). Structural equation model was established to analyze the effects of intergenerational contact on self-rated health and the mediating role of depressive symptoms between family intergenerational contact and self-rated health in the elderly. Results: Totally 15 497 elderly participants were enrolled, with 6 727 males (43.41%) and 8 770 females (56.59%), and there 12 583 individuals lived with family members (81.19%). The median age was 85.00 (interquartile range, 16.00) years. The scores of self-rated health and depressive symptoms were (3.39±0.87) and (2.22±0.56), respectively. The results of structural equation model analysis showed that after adjusting for age, gender and residence, frequent intergenerational contact had a direct positive effect on self-rated health (effect size=0.038, P<0.001), and could improve the depressive symptoms (effect size=0.089, P<0.001) in the elderly. In addition, depressive symptoms had a negative effect on self-rated health in the elderly (effect size=-0.422, P<0.001). Conclusions Frequent intergenerational contact can improve the self-rated health status in the elderly, and indirectly improve the self-rated health level by alleviating depressive symptoms.

Zhejiang province takes an innovative approach in its rural health service strategy featuring routine health examination,which proved an initial success.Intending to assess the effect and dilemma of such a system,and seek sustainable development in future,we made investigations in Pinhu and Xianju in Zhejiang province.Overall,rural health service strategy based on rural health routine examination,to some extent, improved patient-physician relationship,changed and strengthened their rural health concepts,and upgraded non-communicable disease control. Furthermore,the practice has economically and socially influenced rural health service institutions and rural physicians in terms of their concepts and methodology.There are also setbacks and problems in need of govemment support,programme improvement and resource optimization for further sustainability.

Objective To research the significance of application of clinical nursing pathway in patients undertaking glossectomy and forearm flap reconstruction.Methods Sixty patients with tongue cancer who undertook glossectomy and forearm flap reconstruction were enrolled.The patients were randomly divided into the experimental group and the control group (30 cases in each group).The patients of the experimental group received nursing following clinical nursing pathway,and the patients in the control group received routine nursing service.The patients and doctors satisfaction evaluation were compared between the two groups with a self-designed nursing quality evaluation form.The qualities of care achieved in 2 groups were compared.Results It took less in-ward time and expenditure in the experimental group compared with the control group.The quality of care,the satisfactory degree of patients and doctors in the exipermental group were significantly higher than those of the control group.Conclusions The establishment and application of the clinical nursing pathway in patients undertaking glossectomy and forearm flap reconstrucition contributes to improve the satisfaction of patients and doctors and the quality of nursing service.

Objective To investigate the diagnostic value of digital breast tomosynthesis (DBT) plus full-field digital mammography (FFDM) in benign and malignant breast disease.Methods The prospective study enrolled 46 consenting women with a clinical suspicious of breast lesion confirmed by pathology. All the patients underwent DBT, FFDM and dedicated breast magnetic resonance image (DB-MRI) examinations before surgery or biopsy. To observe the manifestation of breast disease in different examinations according to breast imaging reporting and data system (BI-RADS), and to evaluate the visibility grade of disease between DBT plus FFDM and FFDM alone. Using receiving operating characteristic(ROC) and Z test to analysis the diagnostic efficiency of three examinations.Results Forty-six cases included 14 benign cases and 32 malignant cases. Compared with FFDM, 35 cases showed increased visibility in DBT plus FFDM, that the malignant lesion manifested mass with speculated and architectural distortion(23/27) and the benign lesion manifested mass with halo sign(6/8). Eleven cases didn't show increase visibility in both DBT plus FFDM and FFDM alone. The ration of BI-RADS 0 in FFDM was 23.9%(11/46), meanwhile in other two examination were 0. The ration of BI-RADS 3 in DBT plus FFDM was the lowest(6.5%, 3/46). When the lesion in DBT plus FFDM showed mass or speculated, in MRI showed similar morphology with mass or mass-like enhancement. According pathology as the gold standard, excluded 11 cases with BI-RADS 0 in FFDM, there was significant statistical difference between DBT plus FFDM and FFDM alone in 35 cases (Z=2.132, P=0.033) to differentiate benign and malignant breast disease, the area of ROC curve were respectively 0.955, 0.878. There is no statistical difference between DBT plus FFDM and MRI in 46 cases (Z=0.502, P=0.616), the area of ROC curve were respectively 0.887, 0.908.Conclusion DBT combined with FFDM can improve both detection of breast lesion and diagnostic efficiency, while the performance value between DBT and MRI are equal.

ObjectiveTo analyze the differences of United States (US) and France (Fr) Risser grading systems in determining the growth potentiality of girls with adolescent idiopathic scoliosis (AIS).Methods Girls with AIS undergoing posterior spinal correction with autogenous bone graft were recruited.The Risser grades were recorded for the non-dominant side iliac crest apophysis according to the US and Fr grading systems.Iliac crest cartilage biopsies were harvested during surgery then standard histologic grades(HGs) of proliferation activity of iliac cartilage were analyzed on histological section.The agreement of two grading systems was analyzed by kappa statistics while the correlation between Risser grades and HGs were analyzed by Spearman correlation analysis.Receiver Operating Characteristic (ROC) curve was employed for selecting the best parameter in determining growth cessation of girls with AIS.ResultsFifty-three AIS girls with an average age of 14.0 years were recruited.The agreement of two grading systems was poor.The US system showed higher correlation with HGs compared to Fr system.Growth cessation could be determined by Risser grade 5 of US system or Risser grade 4 of Fr system,also older than 16 years or three years after menarche.When combining the results of ROC curve analysis,the Risser grade 4-5 of US system with two years after menarche could be used in determining growth cessation with the highest sensitivity,specificity and accuracy.Furthermore,the mean age of patients with growth cessation determined by this method was 15.2 years,showed 0.9-1.4 years earlier than the age determined by other methods.ConclusionThe US Risser grading system is better in determining maturity of AIS girls compared to Fr Risser grading system.By combining years since menarche,the accuracy of Risser grades in determining growth cessation could be enhanced,and the time of weaning from a brace could be advanced.

Objective To investigate the regularity and predictors of weight loss during concurrent chemo-radiotherapy for nasopharyngeal carcinoma patients. Methods A retrospective study was carried out on 82 patients with nasopharyngeal carcinoma ,with average age of 45 years ,who received concurrent chemoradiotherapy at the Affiliated Cancer Hospital of Guangzhou Medical University. Paired t-test was used to analyze the weight loss pattern during chemoradiotherapy. The Spearman′s rank correlation analysis was used to investigate the correlation between high weight loss(HWL)and the clinical factors. Results The paired t-test showed that the weight of the patients decreased continuously every week during chemoradiotherapy(P < 0.05),and the value dropped most significantly during the 4th week. Among these 82 patients,32 were determined as HWL(weight loss > 10%). Spearman′s rank correlation analysis showed that HWL was associated with older age,female,higher T and TNM stage,3D-CRT technology,the higher dose of radiotherapy in nasopharynx and in neck lymph node,and decreases of leukopenia and hemoglobin over degree Ⅱ(P<0.05). Conlousions Weight may decrease continuously every week during chemoradiotherapy for nasopharyngeal carcinoma patients. Age,gender,T stage,TNM stage,radio-therapy dose,and leukopenia and hemoglobin decreases may be predictors for weight loss degree during concurrent chemoradiotherapy for nasopharyngeal carcinoma patients.

Objective To study the morbidity rate of and relevance to coronary stenosis in cerebral infarction patients. Methods CT coronary angiography was performed in 112 cases of cerebral infarction after CT cerebral angiography. Multivariate logistic regression analysis was carried out between the clinical data and coronary stenosis. Results In 112 cases receiving CT cerebral angiography, the morbidity rate of coronary stenosis was 46.4%. In 95 cerebral infarction patients, the morbidity rate of coronary stenosis was 51.6%. Multivariate logistic analysis showed that age, hypertension, hyperlipeidemia, significant narrowing of cerebral artery were identified as independent predictors for coronary stenosis. Conclusions Heart examination with 64 row CT should be routinely performed after cerebral angiography in cerebral infarction patients,especially in those with age greater than 65 years, hypertension, hyperlipoidemia and significant narrowing of cerebral artery so as to detect coronary stenosis early.