Objective To observe the CT features of mycoplasma pneumoniae pneumonia. Methods CT features of 40 adult patients with serologically proven mycoplasma pneumoniae pneumonia were retrospectively reviewed. Results The most common CT findings of mycoplasma pneumoniae pneumonia were ground-glass opacity (34/40, 85.00%) and consolidation (28/40, 70.00%). The other findings included nodules (18/40, 45.00%), thickening of the bronchovascular bundles (6/40, 15.00%), interlobular septal thickening (6/40, 15.00%), mediastinal lymphadenopathy (6/40, 15.00%) and pleural effusion (4/40, 10.00%). Most of the ground-glass opacity and consolidation showed tendency of lobular distribution and involving the lower lobes. In some patients, the absorption of the lesions was slower than the relief of symptoms. Conclusion CT findings of mycoplasma pneumoniae pneumonia have some features, and can provide help for the diagnosis of mycoplasma pneumoniae pneumonia.

Objective To investigate the feasibility with low dose contrast agent in patients undergoing peripheral magnetic resonance angiography with high spatial resolution at open-bore 3 T scanner. Methods Images of MRA were assessed separately by two radiologists. And the images of DSA were assessed by one radiologist. The degree of the two interobservers' consensus for detection of arterial stenosis was determined by calculating the Kappa coef-ficient. Spearman rank correlation coefficient was used for revealing the relationship between contrast-enhanced MR angiography and DSA,in terms of categories of stenosis. Results For the degree of vessel stenosis, Cohen' s statis-tics revealed excellent agreement between the two observers. There was a significant correlation between DSA and MRA(P<0. 05). Conclusion At this open-bore 3 T scanner, high spatial resolution peripheral magnetic reso-nance angiography is achieved with low dose contrast agent.

Background Peripheral refraction of retina brings about influence on myopia development,and different corrective methods will play different roles on the peripheral refraction.Objective This study was to measure the peripheral refraction with progressive addition lenses (PALs) and single-vision spectacle lenses (SVLs) corrected in adolescent myopic eyes and to investigate the difference between them.Methods This was a selfcontrolled cross-sectional study.Forty corrected myopic eyes with PALs were recruited for the study.Twenty-three male and seventeen female subjects aged 10-15 years (mean 12.54 years±1.45 years) enrolled in this study.The refractive errors of the subjects ranged form-1.50 D to-6.00 D (mean-3.74 D±1.09 D) and the astigmatism was less than-1.50 D with the corrected visual acuity at least 20/25.1％ Tropicamide eye drops was topically administered for the cycloplegia and then Grand Seiko WAM-5500 Auto-refractor was used to measure the peripheral refraction.The measured points were determined follows as:fovea (0°),peripheral temporal (T30°,T20°,T10°) and nasal (N30°,N20°,N10°) visual fields from the right eyes.The mean of the six measuring points for each position was calculated.Peripheral refraction was measured from each subject under the wearing of PALs or SVLs (randomly in succession),and the statistic analyse perimeters included M value,relative peripheral refractive error (RPRE),J45,J180.Written informed consent was obtained from each subject before examination.Results The corrected visual acuity was 4.98 ± 0.65 and 4.97 ± 0.53 under the PALs and SVLs conditions respectively,showing in significant difference between them (t =0.222,P =0.639).Hypermetropic shift in peripheral M value and RPRE value were found with the increase of visual angle field,in contrast,the peripheral J180 showed a myopic shift,and significant difference was found among the six peripheral points with all of the above three perimeters (P＜0.05).Negative J45 values in the temporal visual filed and positive J45 values in the nasal filed showed less shift.Some peripheral angles of the peripheral refractions in M value,RPRE value,J180,J45 showed significantly difference from the fovea refraction(P＜0.05).Compared with SVLs correction,PALs induced relatively myopic shifts in M value and RPRE value in all of the peripheral angle fields,showing significant differences(P＜0.05).Conclusions PALs causes relatively myopic shift at the peripheral retina in adolescent myopic eyes in comparison with SVLs,and the important parameters are M value and RPRE value.The effect of PALs on controlling the onset and progression of myopia may be interpreted by peripheral refraction.

Objective To preliminarily study the effect of high concentration prolactin (PRL) on the immune system in schizo-phrenic patients by analyzing the changes of lymphocyte subsets and immunoglobulins (IgG ,IgM ,IgA) levels .Methods The flow cytometry was used to detect the T lymphocytes CD3+ ,CD4+ and CD8+ subsets ,NK cell percentages and CD4+ /CD8+ ratio re-spectively .The three humoral immune indicators(IgG ,IgM ,IgA) in peripheral blood were detected by using the immunoturbidimet-ric turbidimetric method .The data were analyzed by adopting the analysis of variance .Results Compared with the healthy control group and schizophrenia normal PRL group ,T lymphocytes CD4+ subsets percentages and CD4+ /CD8+ ratio as well as IgG were increased in the schizophrenia PRL increase group(P<0 .05) ,while the percentage of NK cells was decreased(P<0 .05) .Conclu-sion High concentration PRL may have a certain effect on the immune system by influencing the balance among lymphocyte sub-sets and the production of immunoglobulins .

Objective To investigate the change of cardiac function in elderly hypertensive patients with heart valve degenerative by echocardiography.Methods A total of 126 cases were divided into a valve disease group and non-valve disease group groups.The parameters of trial size,cardiac function and pulmonary artery pressure were detected.Results Of all 126 cases were the patients with hypertension including 28.6% (36/126) of valve disease group and 71.4% (90/126) of non-valve disease.There were 31 cases with mitral valve disease,22 cases with tricuspid valve disease; 26 cases with aortic valve disease; 36 cases with double or three alvular lesions in valve disease group.There was a significant difference in ventricle size and systolic function among valve disease group and non-valve disease group and control group.But there was no significant difference in thickness of ventricular wall between valve disease group and non-valve disease group.Conclusion The elderly hypertensive patient with valve disease was an independent factor for the development of congestive heart failure.

Objective To evaluate the long-term effective rate,retention rate and tolerability of the ketogenic diet (KD) in pediatric drug-resistant epilepsies.Methods Data of 36 children who were treated in Department of Pediatrics,the Second Affiliated Hospital of Xi'an Jiaotong University from Nov.2011 to Dec.2013 and had continuous follow-up of at least 12 months after initiation of the KD were analyzed prospectively.Response was defined as 50％ seizure reduction.The effective rate,retention rate, outcome-predictive value of various clinical factors were also assessed.The causes of the patients withdrew from KD and side effects were recorded and analyzed.Results Thirty-six children(29 boys,7 girls; mean age of 2.84 years)were included.The effective rate was 50.0％,52.8％,47.2％ and 41.7％ at the 1,3,6,12 months;the retention rate respectively was 94.4％,91.2％,69.4％ and 52.8％.Seventeen cases withdrew from KD.Seven cases (41.2％)ceased KD becau~ of a lack of compliance,5 patients because of poor outcome,and 2 cases because of repeated infection.None of the age,disease duration,etiology and seizure type could be used as the predictor for the favourable treatment for outcome.The antiepileptic drugs before KD might be predicted the efficacy of the KD.The less amount of the antiepileptic drugs,the more opportunity of the KD might have to succeed.The side effects on the start-up period were drowsiness,week and digestive discomfort,hyperlipoidemia,hypoglycemia and hepatic dysfunction.The side effects on the maintenance period were digestive discomfort,susceptibility to infection,hyperlipoidemia,the deficiency of trace elements.Conclusions The KD is a safe and potentially effective method in treatment of refractory epilepsy patients who do not respond to customary medication therapies.

Objective To study the effect of cyclooxygenase-2 (COX-2)selective inhibitor Celecoxib on the expression of P-glycoprotein(P-gp)in the brain of rats with status epilepficus,in order to assess the therapeutic value of intractable epilepsy.Methods Sixty adult male SD rats were randomly divided into blank control group,the epilepsy model group and Celecoxib intervention group.The status epilepticus was induced in rats by injecting Lithium pilocarpine.Forty-eight rats were included in the experiment.There were 16 rats in each of the blank control group,epilepsy model group and Celecoxib intervention group,respectively.Immunohistochemical method and Western blot method were used to detect the expression of P-gp in experimental group in the frontal cortex and hippocampus.Results Immunohistochemistry result showed that the expression of P-gp was significantly higher in epilepsy model group than the blank control group,and the difference was statistically significant (P ＜ 0.01);The P-gp expression in the Celecoxib intervention group was lower than that in the epilepsy model group,and the difference was statistically significant (P ＜0.01).Western blot results suggested that the expression of P-gp could be found both in the frontal cortex and hippocampus in each group.Compared with the blank control group,the P-gp expression was significantly higher than that in the epilepsy model group,and the expression of the P-gp was lower after the Celecoxib intervention than that in the epilepsy model group,and the difference was statistically significant (P ＜ 0.05).Conclusions COX-2 inhibitor Celecoxib could decrease the expression of P-gp in brain tissue with status epilepticus,which may provide a new method for the treatment of intractable epilepsy.

We evaluated clinical application effect of gene chip for detection of rifampin (RFP) and isoniazid (INH) resistance in Mycobacterium tuberculosis (MTB).Rifampin and isoniazid drug-resistance gene loci were detected by gene chip with sputum specimens from smear-positive tuberculosis patients and clinical strains,comparing the results of detection.BACTEC MGIT 960 drug susceptibility test results were used as control to evaluate the detection performance of gene chip.The sequences of the polymerase chain reaction products of the rpoB,katG and inhA genes from 999 strains identified as Mycobacterium tuberculosis were determined to confirm the mutations by DNA sequencing.Results showed that 100 cases were identified as nontuberculous mycobacteria by gene chip in the 1 108 cases of smear-positive samples.Among the rest 1 008 samples,there were only 9 cases of microarray results different from BACTEC MGIT960 culture-positive strains,achieving the coincidences of 99.1％.Compared with BACTEC MGIT 960 drug susceptibility test results,the gene chip method displayed a concordance of 98.1 ％ and 94.5 ％ for RFP and INH respectively in the 999 strains.Compared with the DNA sequencing method,the accuracy of gene chip method was 99.6％ for rifampin resistance and 99.8％ for isoniazid resistance.It's concluded that the gene chip technology can quickly and accurately detect rifampin and isoniazid resistance in MTB and can be used directly for the detection of sputum samples.

OBJECTIVE To probe into the impact factors of the nosocomial respiratory tract infections after the operations with tracheal intubation under general anesthesia in order to establish the prevention and treatment strategies and provide the scientific basis.METHODS By descriptive epidemiological method and case-control study method,80 cases with nosocomial respiratory tract infections in nearly 3 years who had tracheal intubation under general anesthesia were selected,and another 180 patients with non-nosocomial respiratory tract infections with tracheal intubation under general anesthesia were selected as the control.RESULTS The incidence of the nosocomial infections from 5923 patients of the operation with tracheal intubation under general anesthesia from 2005 to 2007 accounted for 10.1%.The incidence of the respiratory tract infections of operations under general anesthesia accounted for 5.25%.The nosocomial respiratory tract infection from the tracheal intubation under general anesthesia toped the list and accounted for 52.0%.It showed seven impact factors on the nosocomial respiratory tract infection after the operation with tracheal intubation under general anesthesia by the multi-factorial Logistic regression,respectively,with significant differences(P1).CONCLUSIONS There are many impact factors that the nosocomial respiratory tract infection(especially lower respiratory tract infection) resulting from the operation with tracheal intubation under general anesthesia.The study shows the main risk factors: age,the complications of the disease,surgical condition,the ventilation time of tracheal intubationunder the anesthesia,post-operative recovery time,smoking status,the time that the operated patients start coughing after the operation.Therefore,the prevention is especially important.