精索静脉曲张与前列腺静脉丛关系的彩色多普勒研究

目的利用彩色多普勒超声(CDFI)评估精索静脉曲张(VC)与前列腺静脉丛之间的关系,以探讨VC的病因。方法用CDFI对左侧VC组(135例)、双侧VC组(51例)及对照组(100例)进行精索静脉、前列腺静脉丛内径(PVD)及血流动力学参数的观察,并对3组对象平静呼吸时PVD、Valsalva试验时前列腺静脉丛最大反流速度(RFV)及平静呼吸时的最大流速(AFV)进行统计学分析。将两组VC患者的精索静脉内径(SVD)分别与PVD、RFV及AFV进行相关分析;并对其中30例VC患者术前术后PVD、RFV、AFV进行统计学分析。结果双侧VC组PVD及RFV均明显大于对照组及左侧VC组(P<0.01);左侧VC组PVD、RFV与对照组比较,均差异无统计学意义(P>0.05)。3组对象AFV比较,均差异无统计学意义(P>0.05)。30例VC患者手术前、后PVD、RFV及AFV比较,均差异无统计学意义(P>0.05)。结论双侧VC患者可能伴随有潜在的系统性血管异常。

Systemic abnormalities in liver disease

Systemic abnormalities often occur in patients with liver disease. In particular, cardiopulmonary or renal diseases accompanied by advanced liver disease can be serious and may determine the quality of life and prognosis of patients. Therefore, both hepatologists and non-hepatologists should pay attention to such abnormalities in the management of patients with liver diseases.

Assessing the Seasonal Predictability of Summer Precipitation over the Huaihe River Basin with Multiple APCC Models

Seasonal rainfall predictability over the Huaihe River basin is evaluated in this paper on the basis of 23-year(1981-2003) retrospective forecasts by 10 climate models from the Asia-Pacific Economic Cooperation(APEC) Climate Center(APCC) multi-model ensemble(MME) prediction system.It is found that the summer rainfall variance in this basin is largely internal,which leads to lower rainfall predictability for most individual climate models.By dividing the 10 models into three categories according to their sea surface temperature(SST) boundary conditions including observed,predicted,and persistent SSTs,the MME deterministic predictive skill of summer rainfall over Huaihe River basin is investigated.It is shown that the MME is effective for increasing the current seasonal forecast skill.Further analysis shows that the MME averaged over predicted SST models has the highest rainfall prediction skill,which is closely related to model's capability in reproducing the observed dominant modes of the summer rainfall anomalies in Huaihe River basin.This result can be further ascribed to the fact that the predicted SST MME is the most effective model ensemble for capturing the relationship between the summer rainfall anomalies over Huaihe River basin and the SST anomalies(SSTAs) in equatorial oceans.

Lower Energy α Elastic Scattering on ^(20)Ne and Anomaly of α+^(20)Ne Scattering System

The a＋^2＋ Ne elastic scattering angular distributions at lower incident energies of Eα= 12.7-31.1 Me V have been analyzed by using the a-folding potential based on the α＋^16O structure model of the ^20Ne nucleus. The a-folding potential with a standard Woods-Saxon type imaginary part, can reasonably describe experimental cross sections and the anomalous large angle scattering （ALAS） features. The anomaly of the a＋^20Ne scattering system is further confirmed , in the lower incident energy region.

Bronchoscopic biopsy for diagnosis of lung cancer in the absence of visible endobronchial abnormalities

Objective Bronchoscopy has been extensively used in the diagnosis of respiratory diseases, and par- ticularly, malignant diseases. However, endoscopists do not normally perform bronchoscopic biopsy in Case lesions are undetected via bronchoscopy. The aim of this study was to evaluate whether performing bron- choscopic biopsy could be established in the diagnosis of lung cancer in case of endobronchial abnormali- ties undetectable to the naked eye. Methods We retrospectively analyzed 109 cases between January 2008 and December 2012. The in- clusion criteria were confirmed lung cancer diagnosis, transbronchial biopsy performed in the absence of visible endobronchial manifestations, brushing, and bronchoalveolar lavage （BAL） according to the images obtained from high-resolution computed tomography （HRCT）. Data regarding age, sex, pathology, tumor stage; the method of diagnosis; location of primary lesion （central, peripheral, or intermediate）; tumor size, mediastinal lymph node metastasis, and the serum carcinoembryonic antigen （CEA） value were collected. The Pearson chi-square test or Fisher＇s exact and McNemar tests were used in the univadate analysis. Results Among the 109 patients, the diagnosis of 37 （33.9%） patients was confirmed through bronchos- copy. Brushing and BAL had higher positive detection rates than biopsy （P = 0.004）. There were no differ- ences in the positive detection rates between the sex, pathology, lesion location, tumor size, lymph node metastasis, and the serum CEA value （P〈 0.05 for all groups）. Conclusion Despite the normal appearance of the endobronchial manifestations, lesions undetectable by bronchoscopy could be indicated. Therefore, we suggest performing bronchoscopic biopsy and that brushing and BAL might increase the positive detection rate of bronchoscepic examination.

Charge disproportionation induced exchange bias in La_(0.5)Ca_(0.5)FeO_(3-δ)

We observed an exchange bias effect in La0.5Ca0.5FeO3 perovskite compound.The exchange bias is associated with the charge disproportionation transition from Fe4+ions to Fe3+and Fe5+ions below 175 K.The competition between the ferromagnetic interaction of Fe3+and Fe5+ions and the antiferromagnetic one of Fe3+and Fe3+ions results in a unidirectional anisotropy in the cluster-glass system.An antiferromagnetically interfacial exchange coupling constant Ji1.95 meV at the cluster-glass region was yielded by fitting the cooling field-dependence of the exchange bias field.