Objective To study the efficiency of oral ferric ammonium citrate solution as a negative gastrointestinal contrast agent on magnetic resonance cholangiopancreatography (MRCP). Methods Sixty subjects were divided into two groups at random. Routine MRCP were performed directly for one group, and routine MRCP were performed after oral ferric ammonium citrate solution for another gruop. Contrast effect was evaluated on the basis of signal intensity in the stomach and duodenum at MRCP. Results The mean Raddit score of control group (without oral ferric ammonium citrate solution) was 0.275, and that of oral ferric ammonium citrate group was 0.725 (P

Objective:To study the effect of leuprolide preoperative used in the patients with uterine fibroids .Methods:Totally 70 patients with uterine fibroids were divided into the observation group and the control group with 35 ones in each.The 35 patients in the control group were with laparoscopic myomectomy , and those in the observation group was given leuprolide , 3.75 mg per time, once in a month for 3 months, and then undergone laparoscopic myomectomy .The serum hormone levels , menstruation situation and fi-broids and uterus volume changes in the observation group were observed and compared before the treatment and after the 3-month leu-prolide treatment .The situation during the operation and after the operation , and the recurrence rate of uterine fibroids between the two groups were compared .Results:After the pretreatment of leuprolide , the levels of luteinizing hormone ( LH) , follicle-stimulating hor-mone (FSH) and serum estradiol (E2) in the observation group were significantly lower than those before the treatment (P<0.05), and the menstrual blood volume , uterine volume and fibroid volume were significantly lower than those before the treatment , and the differences were statistically significant (P<0.05).The blood loss during the operation and pelvic drainage of the observation group were significantly lower than those of the control group , and the ambulation time and length of hospital stay of the observation group were significantly shorter than those of the control group with statistically significant differences (P<0.05).Conclusion:Leuprolide preoperative used in the patients with uterine fibroids can significantly reduce serum hormone levels and fibroid volume , which are ben-eficial to myomectomy with smaller surgery invasion and better prognosis .

0.99. The recovery rates were 72.25% -109.0% with the relative standard deviation (RSD) of 1.82% -11.61% . Conclusion The method is fast,simple,sensitive and needs no organic solvent and it is applicable to the determination of organochlorine pesticides and chlorobenzene compounds in water.

Objective To evaluate the clinical feature of the aldosterone-producing adenoma(APA) and idiopathic hyperaldosteronism(IHA)in primary hyperaldosteronism.Methods Retrospectively analyzed clinical feaures of 76 patients with APA and 17 patients with IHA.Results (1)Compared with the patients with IHA,the patients with APA had higher plasma and urinary aldosterone,lower serum potassium.(2)Furosemide provocation test(FPT)in 48 patients with APA and 14 patients with IHA were carried out.It was found that the plasma aldosterone after FPT was increased or no changed in 27 patients with adenoma,and increased in the others.It was increased in all IHA patients.(3)The diagnostic accuracy rate of CT was 84.2% in 88 patients with computed tomography imaging(CT).Conclusion The anomalies of laboratory in patients with APA are more evidence than those of IHA.The results of FPT are overlapped in a considerable amount of APA and IHA.Now those with elevation of serum aldosterone after the FPT can not exclude the adenoma.The diagnostic accuracy rate can be improved according to FPT and CT.

Objective To evaluate the relationship between 5,10-Methylenetetrahydrofolate reductase(MTHFR) gene polymorphisms and colorectal cancer(CRC).Methods Studies were selected based on the criteria for inclusion.The Meta-analysis software,REVMAN 4.2,was applied for checking the heterogeneity across the studies and calculating the pooled OR.The results were evaluated by the analyses of publication bias and sensitivity.Results A total of 9 787 cases and 12 986 controls from 18 studies for C677T and a total of 4 422 cases and 5 819 controls from 9 studies for A1 298C were included.No heterogeneity among the studies was found.For codon 677,the frequencies of CC,CT and TT genotypes were 46.48%,43.81% and 9.71% in cases,and 45.03%,43.08% and 11.89% in controls,respectively.The pooled OR of TT vs.CT+CC was 0.80(95%CI 0.74～0.87).For codon 1 298,the frequencies of AA,AC and CC genotypes were 53.60%,39.39% and 7.01% in cases,and 53.31%,38.67% and 8.03% in controls,respectively.The pooled OR of CC vs.AC+AA was 0.84(95%CI 0.72～0.97).Conclusions MTHFR 677TT is at lower risk of developing CRC and 1 298CC genotypes might be associated with the decreased risk of developing CRC.

Objective To investigate the clinical value of INSURE technology in very low and extremely low birth weight infants requiring respiratory support.Methods From June 2010 to August 2012,83 cases of very low and extremely low birth weight infants who had difficulty in breathing and required respiratory support were admitted into First Hospital of Tsinghua University and divided into two groups:INSURE group (n=41) and mechanical ventilation (MV) group (n=42).Infants in INSURE group accepted intubate-pulmonary surfactant-extubate to continuous positive airway pressure and those in MV group accepted intubation with or without pulmonary surfactant treatment,and mechanical ventilation without extubation.Arterial blood gases at 1 h and 12 h after treatment were compared between the two groups by t test.The incidence of respiratory distress syndrome,ventilator associated pneumonia,air leaking,chronic lung disease,intracranial hemorrhage,retinopathy,leukoencephalomalacia disease were compared with Chi-square test.Hospitalization costs,duration of ventilation,oxygen inhalation and hospital stay were compared by rank-sum test.Results (1) PO2 in INSURE group after one hour of treatment were (78.7 ±11.5) mm Hg(1 mm Hg=0.133 kPa),which were higher than those before treatment [(50.1 ±10.8) mm Hg,t=9.737,P＜0.05]; while PCO2 was lower[(48.3±8.9) mm Hg vs (54.9±11.5) mm Hg,t=-3.428,P＜0.05].PO2 in MV group after one hour of treatment were (80.2±10.0) mm Hg,which were higher than those before treatment [(51.3±9.8) mm Hg,t=10.093,P＜0.05]; while PCO2 was lower[(45.6±9.5) mm Hg vs (57.1±12.8) mm Hg,t=-4.526,P＜0.05].(2) There were no difference in PO2 and PCO2 between the two groups after one hour of treatment (P＞0.05).After 12 hours of treatment,no differences were found in PO2[(89.4±11.5) mm Hgvs (90.2±10.8) mm Hg,t=0.093] and PCO2[(44.2±5.9) mm Hg vs (39.1± 7.3) mm Hg,t=0.126] between INSURE group and MV group (P＞0.05 respectively).(3) The incidence of ventilator associated pneumonia,air leaking,intracranial hemorrhage and chronic lung disease in INSURE group were 7.3％ (3/41),4.9％ (2/41),4.9％ (2/41) and 4.9％ (2/41),which were lower than those in MV group [34.1％ (14/42),x2=27.470; 16.7％ (7/42),x2=8.651;19.0％ (8/42),x2 =8.814; 11.9％ (5/42),x2 =4.275](P＜0.05 respectively).Duration of ventilation,oxygen inhalation,neonatal intensive care unit stay in INSURE group were 5 d (3-7 d),8 d (5-11 d) and 16 d (11-25 d),which were all shorter than those of MV group [8 d (4-12 d),Z=-1.947; 12 d (8-22 d),Z=-2.013; 21 d (12-35 d),Z=-1.782](P＜0.05 respectively).Conclusions INSURE technology could be used in very low and extremely low birth weight infants because of less invasiveness,fewer complications,safety and low-cost.

In order to investigate the effect of deep brain stimulation on diseases such as epilepsy, we developed a closed-loop electrical stimulation system using LabVIEW virtual instrument environment and NI data acquisition card. The system was used to detect electrical signals of epileptic seizures automatically and to generate electrical stimuli. We designed a novel automatic detection algorithm of epileptic seizures by combining three features of field potentials: the amplitude, slope and coastline index. Experimental results of rat epileptic model in the hippocampal region showed that the system was able to detect epileptic seizures with an accuracy rate 91.3% and false rate 8.0%. Furthermore, the on-line high frequency electrical stimuli showed a suppression effect on seizures. In addition, the system was adaptive and flexible with multiple work modes, such as automatic and manual modes. Moreover, the simple time-domain algorithm of seizure detection guaranteed the real-time feature of the system and provided an easy-to-use equipment for the experiment researches of epilepsy control by electrical stimulation.
Algorithms ; Animals ; Deep Brain Stimulation ; instrumentation ; Disease Models, Animal ; Electroencephalography ; Epilepsy ; diagnosis ; Equipment Design ; Rats ; Seizures ; diagnosis

Objective To determine the gene polymorphism and serum concentration of mannose-binding lectin (MBL) in patients with psoriasis,and to analyze the relationship between MBL and psoriasis.Methods Totally,67 patients with psoriasis vulgaris and 69 healthy human controls were enrolled in this study.Venous blood samples were obtained from all the subjects.Genomic DNA was extracted,and PCR-restriction fragment length polymorphism (PCR-RELP) analysis was conducted to determine the polymorphism at codon 54 of the MBL gene.Enzyme-linked immunosorbent assay was performed to measure the serum level of MBL.A chi-square goodness-of-fit test was carried out to evaluate Hardy-Weinberg equilibrium,t test to compare the serum concentration of MBL,and chi-square test to compare the frequency of genotypes and alleles of MBL gene codon 54.Results The patients with psoriasis showed higher frequency of GGC/GAC heterozygote but lower frequency of GGC/GGC homozygote (x2 =10.36,P ＜ 0.05),together with increased frequency of GAC allele but decreased frequency of GGC allele (x2 =8.31,P ＜ 0.05),at codon 54 of the MBL gene compared with the healthy controls.The variant allele GAC at codon 54 of the MBL gene was markedly associated with psoriasis (OR =3.383,95％ CI 1.585-7.211,P ＜ 0.05).The serum concentration of MBL was (2.193 7 ± 0.816 3) mg/L in patients with psoriasis,significantly lower than that in the healthy controls ((3.269 5±1.205 8) mg/L,t=6.11,P＜ 0.05).Conclusion MBL might be associated with the pathogenesis of psoriasis to some degree.

Objective To explore the effects and mechanism of atrovastatin on the expression of the NF-κB in renal tissues of diabetic rats.Methods A total of 60 male SD rats was randomly taken out 40 rats to make diabetic model by injection of 65mg streptozotoein (STZ) into enterocoelia,the rest of 20 rats were normal control group.After the model made,atrovastatin (2 mg/kg/d) was given to the treated group,and the normal control group and diabetic rats without treatment group were given equivalent water.After 12 weeks,the rats were killed.Total RNA of the renal tissues was isolated from one kidney for each rat,and the renal tissues from the another kidney was prepared for immunohistochemistry (IHC) analysis.The NF-κB mRNA expressions among three groups were determined by RT-PCR.The distribution of NF-κB in the renal tissues was observed,and compared its difference among three groups.ResultsPCR showed that NF-κB mRNA was increased in the renal tissues of diabetic rats compared to control rats ( P ＜ 0.05 ).Drug-treated rats showed significantly decreased levels of NF-κB mRNA in the renal tissues compared to the untreated diabetic group( P ＜0.05).The results were also observed in protein lelel of NF-κB expression.IHC showed that there existed positive cells in the glomerular and renal tubulointerstitum.Conclusions Atrovastatin can down-regulate the expression of NF-κB and suppress the increased level of NF-κB protein in the renal tissue of diabetic rats,and slow the progress of retinopathy.

Objective: Our aims were to measure DNA content in primary lung cancer and to study the relationship between the DNA content and TNM stage, histological differentiation of tumor cell, cellular proliferation, and apoptosis. Methods: The DNA content and cellular proliferation were analyzed using flow cytometry. Tumor cell apoptosis was detected by using TUNEL method. Results: (1) The DNA index (DI) distribution ranged from 0.829 to 2.514. There were 41 cases (77.4%) of DNA aneuploid. The distribution of DI and DNA aneuploid was independent of histological subtypes（P>0.05）.(2) With the increase of TNM stage, the DI and the rate of DNA aneuploid increased（P<0.05）.(3) There was relationship between DI and histological differentiation of tumor cell. The DI was higher in tumors of poor differentiation than those in tumors of moderate and good differentiation（P<0.05 and P<0.01）. (4) The cellular proliferation index of aneuploid tumors was significantly higher than that of diploid tumors(P<0.01), while apoptosis index of aneuploid tumors was significantly lower than that of diploid tumors (P<0.01). Conclusion: Correlations exist between DNA content and TNM stage, hiological differentiation, cellular proliferation, and apoptosis.