Purpose To evaluate the diagnostic value of diffusion weighted imaging with high b value in acute cerebral microinfarcts.Materials and Methods Conventional MRI and diffusion weighted imaging with standard b value (b=1000 s/mm2) and high b value (b=3000 s/mm2) were performed in the 7 patients with acute cerebral infarction,and all the images were evaluated.The signal to noise ration (SNR) and contrast to noise ration (CNR) were measured.Results Five patients were detected much more microinfarcts in high b value as HB group than that in standard b value as SB group.The SNR and CNR were significantly higher in high b value group than that in standard b value group (P＜0.05),but the apparent diffusion coefficient value showed no significant difference between the two groups (P＞0.05).Conclusion DWI with high b value could sensitively detect acute cerebral microinfarcts with high clinical value.

Objective To analyzed imaging features of testicular and epididymal tumors or inflammatory nodes in children and to improve its diagnostic accuracy.Methods 13 cases underwent ultrasonography,of them,plain CT scan in 10 cases,enhanced CT scan in6 cases.Its signs were retrospectively analyzed and compared with surgical and pathological results.Results On ultrasonography,theinhomogenous and different echo could be viewed in 13 cases,color Doppler flow imaging was abundant in 8 masses,3 cases with littler,empty blood flow in 2 cases and retroperitoneal lymphatic metastasis were viewed in 2 cases.On plain CT scan,masses were mixed density in 4 cases,calcification could be seen within tumor in 3 cases,masses were soft tissue or main soft tissue density in 6 cases.Contrast-enhancedCT scan displayed obviously and inhomogenously in 4 cases,lightly enhancment in 1 case and no enhanced in 1 case.By surgical andpathological confirmed,3 were mature treatomaes,1 was immaturity teratoma,4 were yolk sactumor,3 were inflammatory nodes,1 wasrhabdomyosarcoma and 1 was cystic lymphangioma.Conclusion Each kind of testicular tumors in children has its owns CT and UScharacteristics.In combination of CT and US can carry high diagnostic accuracy.

Objective To analyze the consistency of two rapid antigen assays for the diagnosis of influenza A and B. We evaluated the clinical usefulness of silver amplification immunochromatography influenza virus detection kit.Methods Nasopharyngeal swab samples were collected from patients who were suspected of influenza at Huashan Hospital between January and February 2015. Two samples were collected from the same one patient. The samples were tested simultaneously by using IMMUNO AG Cartridge Flu AB kit (AG1) and commercial immunochromatographic assay kit, Clearview exact influenza A&B (CV). PCR method was used as reference.Results A total of 91 samples were tested, of which 7 were positive for influenza A and 53 positive for influenza B by AG1 system; 7 positive for influenza A and 50 positive for influenza B by CV system; and 8 positive for influenza A and 60 positive for influenza B by PCR. The sensitivity and specificity of the AG1 system were 87.5 % and 100 % for influenza A, and 88.3 % and 100 % for influenza B; while the CV system showed sensitivity and specficity of 87.5 % and 100 % for influenza A, 83.3 % and 100 % for influenza B. The AG1 system was 100 % consistent with the CV system in the positive rate of influenza A, and 94.3 % consistent with the CV system in the positive rate of influenza B.Conclusions The AG1 system is well consistent with the conventional immunochromatography-based diagnostic tests in diagnosis of influenza. The AG1 system is useful in earlier diagnosis of influenza due to fewer human error in result interpretation.

Objective To analyze the association of postnatal weight gain proportion of very low birth weight (BW) preterm babies and the onset of severe retinopathy of prematurity,and investigate the optimal cut-off points and predictive ability of postnatal weight gain (WG) proportion for the onset of retinopathy of prematurity (ROP).Methods A retrospective cohort study.257 preterm infants underwent screening whose weight was less than 1500 g were enrolled in this study.Risk factors include BW,gestational age (GA),history of oxygen inhalation,need for blood transfusions,Apgar score in 1 to 10 minutes,embryo number,delivery mode,in vitro fertilization infants,and WG proportion within 6 weeks after birth and other systemic diseases were recorded.Their correlation with severe ROP is analyzed.Clinical outcomes were divided into severe ROP group (patients who suffered from ROP and required treatment) and mild and no ROP group (patients who suffered from ROP but do not require treatment and-patient without ROP).The severe ROP group included 18 patients and mild and no ROP group included 239 patients.Multiple logistic regression and receiver operating characteristic (ROC) curve were used to determine if the WG proportion was independently related to severe ROP development and if it was capable of predicting severe ROP.This study determines the predict value by comparing the area under the ROC curve (AUC) of independent risk factors.Results GA (t=-4.835,P＜0.001),BW(t=-5.192,P＜0.001),history of oxygen inhalation (x2=6.001,P=0.009),proportion of infants who had oxygen inhalation for more than 10 days(x2 =10.019,P=0.002),postnatal WG proportion at 1 week(t =-3.663,P＜ 0.001),postnatal WG proportion at 2 weeks(t=-3.425,P=0.001) had significant difference between two groups.Multiple logistic regression analysis revealed that GA (β =-0.858,P =0.008),BW (β =-0.005,P =0.010),postnatal WG proportion at 2 weeks (β=-8.745,P =0.035) were correlated to severe ROP significantly.And their area under the ROC were 0.836[95％ confidence interval (CI):0.752-0.920],0.826 (95％CI:0.947-0.903),0.744 (95％CI:0.598-0.891) respectively.The optimal cut-off points of GA,BW,and postnatal WG proportion at 2 weeks were 28.41 weeks,1241.96 g,12.80％ respectively.Conclusion Low WG proportion at 2 weeks of very low BW preterm babies is an important and independent risk factor for severe ROP and has certain predictive value of the onset of severe ROP.

OBJECTIVE:To establish a method for the simultaneous content determination of berberine hydrochloride,phello-dendrine hydrochloride and magnoflorine in Phellodendron amurense decoction piece,and to campare the contents of the 3 ingredi-ents in different grades of P. amurense decoction piece. METHODS:HPLC was performed on the column of Phenomenex Luna C18 with mobile phase of acetonitrile-0.05 mol/L KH2PO4 (gradient elution) at a flow rate of 1 ml/min,the detection wavelength was 280 nm,the column temperature was 30 ℃,and injection volume was 5 μl. RESULTS:The linear ranges were 0.387 0-7.740 μg for berberine hydrochloride(r=0.999 9),0.044 4-0.888 0 μg for phellodendrine hydrochloride(r=0.999 8)and 0.048 0-0.960 0 μg for magnoflorine(r=0.999 9);RSDs of precision, stability and reproducibility tests were lower than 3%, recoveries were 95.61%-103.22%(RSD=2.80%,n=6),96.18%-102.80%(RSD=1.84%,n=6) and 97.93%-102.78%(RSD=1.84%,n=6). CONCLUSIONS:The method is simple and accurate,and can be used for the contents determination of berberine hydrochloride, phellodendrine hydrochloride and magnoflonine in P. amurense. The contents of berbenine hydrochloride and phellodendrine hydro-chloride in the first-grade decation piece are higher than those in the second-grade decoction piece,and the content of magnoflorine in both decoction pieces shows no discernible differences.

Objective:To investigate the difference of accuracy between magnetic induction Freehand-3D ultrasound and two-dimensional ultrasound in measuring the volume of thyroid model.Methods:Forty thyroid models were established using porcine liver, and the Archimedes procedure was set as gold standard in the measurement of the volume of each model. The accuracy of measurement of the porcine thyroid model volume between two-dimensional ultrasound and magnetic induction Freehand-3D ultrasound were compared.Results:There were no significant differences in the accuracy of measurements of thyroid model volume among two-dimensional ultrasound, magnetic induction Freehand-3D ultrasound and Archimedes procedure (all P>0.05). Compared with the Archimedes procedure, magnetic induction Freehand-3D ultrasonic method showed higher correlation coefficient of the measurement of thyroid model volume ( r=0.998). Bland-Altman analysis showed the lower measure error with a relative error of 3.42% and range of -9.57% to 12.07%. And the limits of agreement were (-1.253, 0.999) in the magnetic induction Freehand-3D ultrasonic measurement. Conclusions:Compared with two-dimensional ultrasound, the magnetic induction Freehand-3D ultrasound show higher accuracy in the measurement of the volume of the thyroid model.

[ ABSTRACT] AIM:To investigate the effects of tanshinone IIA ( Tan IIA) on proliferation, apoptosis and its mo-lecular mechanism in human hepatoma HepG2 cells under hypoxic condition.METHODS:Hypoxia model was established by treatment with cobalt chloride ( CoCl2 ) .The cells were divided into normoxia control group, hypoxia control group and hypoxia combined at different concentrations of Tan IIA groups.After HepG2 cells were incubated with different concentra-tions of Tan IIA (0.5, 1.0, 2.0, 5.0 and 10.0 mg/L) for 24 h, 48 h and 72 h under hypoxic condition, the cell prolifer-ation was determined by MTT assay.After Tan IIA was added to the media at different concentrations for 24 h and 48 h, the apoptotic cells were observed by Hoechst 33258 staining.The protein levels of hypoxia-inducible factor 1 alpha (HIF-1α) , vascular endothelial growth factor ( VEGF) and wild-type P53 were detected by Western blotting after cultured with different concentrations of Tan IIA for 48 h.RESULTS:Tan IIA inhibited the proliferation of HepG2 cells in a dose-and time-dependent manner.Tan IIA induced the typical morphology of apoptotic cells and increased the apoptotic rate in a dose-and time-dependent manner after treatment with 1.0 mg/L~5.0 mg/L for 24 h and 48 h under hypoxic condition. The protein levels of HIF-1αand VEGF were weakly expressed in HepG2 cells under normoxia but up-regulated after incu-bated under hypoxia for 48 h.The protein expression of HIF-1αand VEGF were decreased with the increase in the concen-tration of Tan IIA under hypoxia.The protein expression of wild-type P53 was increased with the increase in the concentra-tions of Tan IIA under hypoxia.CONCLUSION:Tan IIA significantly inhibits the proliferation and induces the apoptosis of human hepatoma HepG2 cells under hypoxia, which may be related to the down-regulation of HIF-1αand VEGF and up-regulation of wild-type P53.

Background The introvitreal injection of triamcinolone acetonide (TA) before vitrectomy for retinal with choroidal detachment (RD/CD) can alleviate inflammatory response,but it easily lead to complications under the low intraocular pressure.The study on the efficiency and safety of subtenon injection of TA for treatment of RD/CD is lack.Objective This study was to evaluate the efficiency and safety of subtenant injection of TA with vitrectomy for treatment of RD/CD.Methods A retrospective study was adopted.The data of 22 eyes of 22patients who received subtenon injection of TA with vitrectomy for RD/CD were collected and analyzed in Affiliated Eye Hospital of Wenzhou Medical University from May 2010 to June 2014.TA of 40 mg in 0.4 ml was administered subtenantly 5 days before RD repair surgery.After initiating the treatment,the therapeutic effects on uvitis were analyzed.Intraocular pressure was monitored and CD height and range were determined by B type ultrasonography before injection and 5 days after injection respectively.In addition,blood glucose and blood pressure of the patients were evaluated.Results Ocular inflammation alleviated to some degree after TA injection in all 22 eyes.The mean intraocular pressure was (5.4±2.9) mmHg (1 mmHg =0.133 kPa) in pre-injection and (8.2±4.3) mmHg in postinjection,showing a significant difference between them (t =3.430,P ＜ 0.01).The mean maximum CD height was 5.2 (3.1,6.6)mm in pre-injection and 0.9 (0,3.8)mm in post-injection,with a significant difference between the before and after injection (Z=-4.198,P＜0.01).The mean CD range was 12 (10,12) clock before injection and 3(0,6) clock after injection,and no significant difference was found between before and after injection (all at P＞0.05) (Z=-4.124,P＜0.01).There were no statistically significant difference in the changes of blood glucose and blood pressure between before and after injection.The LogMAR visual acuities were 2.14±0.46,1.29±0.57 and 1.17±0.55 before injection and 1 month,3 months after injection,respectively,with a siginificant difference among them (F =22.060,P＜0.001).The retinal reattachment rate was 95.5 ％.Conclusions Subtenon injection of TA seems to be a good option for perisurgical management of RD/CD patients,which can alleviate uvitis,increase intraocular pressure,reduce CD height and CD range.