Objective:To explore the clinical value of point-of-care ultrasonography(PoCUS) in the diagnosis of acute pulmonary embolism(PE).Methods:Consecutive 196 patients suspected of acute PE were enrolled in East Branch, the Second Hospital of Hebei Medical University from January 2017 to November 2017. All the patients were categorized into no PE group( n=143) and PE group( n=53) based on CTPA results. PoCUS was performed and considered diagnostic for PE if one or more right ventricular dysfunction (right ventricular dilation, right ventricular free wall hypokinesia, increased tricuspid regurgitation velocity or decreased tricuspid annular plane systolic excursion), deep venous thrombosis(DVT) or subpleural infarcts were detected. Results:With CTPA as the gold standard for diagnosis, the sensitivity (94.34%), Youden index (0.531) and the area under the ROC curve(AUC) (0.765) of the combined diagnosis of PE by transthoracic echocardiography(TTE), lower limb vein compression ultrasonography(CUS) and lung ultrasonography (LUS) were the highest. The specificity (94.41%) and accuracy (81.63%) of LUS in the diagnosis of PE were the highest, and the misdiagnosis rate (5.59%) of LUS the lowest. The sensitivity of the combined triple PoCUS (TTE, CUS, and LUS) diagnosis of PE was higher than TTE and CUS combined diagnosis ( P=0.016), and the sensitivity and specificity were higher than TTE and CUS combined diagnosis as a whole ( P<0.005). Conclusions:The combined triple PoCUS (TTE, CUS, and LUS) has the highest accuracy in the diagnosis of PE, while LUS has a high specificity and a low misdiagnosis rate in the diagnosis of PE. Therefore, it is recommended to apply the combined triple PoCUS in clinical practice.

To provide guidance for quality control and variety breeding of Gastrodia elata f. glauca cultivated form in Zhaotong, nine agronomic traits of G. elata f. glauca cultivation form were measured and the traits were analyzed using multiple comparison,correlation analysis, multiple stepwise regression analysis and path analysis. The results of multiple comparison and analysis showed that the number of dot ring and the length-width ratio of tuber were no different in G. elata f. glauca cultivation form. The coefficient of variation about the single tuber fresh weigh, ring spacing and belly button diameter was about 20%. The coefficient of variation about the length of the tuber, the width of the tuber, the thickness of the tuber, the length-width ratio of tuber and the number of dot ring was near 10%. The correlation analysis results showed that the single tuber fresh weigh and the length,the width and the thickness of the tuber were extremely significant positive correlated. The results of multiple stepwise regression analysis and path analysis showed that the length, the width and the thickness of the tuber were the main factors affecting the fresh weight of single tuber,which were the best agronomic traits on high yield of G. elata f. glauca. The length of the tuber,the width of the tuber and the thickness of the tuber, which would be used as indicators of the characteristics of high yield varieties in Zhaotong. The number of dot ring and the length-width ratio of tuber, which would be selected as quality control indicators of the genuine Chinese medicinal materials in Zhaotong.