Objective To evaluate the effectiveness and safety of interventional embolectomy in the treatment of acute massive pulmonary embolism. Methods Interventional managements, including fragmentation, aspiration and dissolving of the embolus, were performed in 12 patients with CTPA-or pulmonary angiography-proved acute massive pulmonary embolism. Clinical manifestations, blood gas tension, hemodynamic changes, the recanalization of the pulmonary artery as well as the occurrence of complications were observed. Results Eleven patients survived and nine patients showed significant clinical improvement. PaO2 was increased from (54.92 ? 6.17)mmHg before the procedure to (90.91 ? 1.62)mmHg after the procedure (P = 0.001), and SaO2 was also increased from (85.17 ? 8.39)mmHg before the procedure to (95.75 ? 1.96)mmHg after the procedure (P = 0.001). Miller score (21.75 ? 4.35 vs 13.83 ? 5.69, P = 0.001) and mPAP (25.59 ? 7.68 mmHg vs 30.04 ? 7.93 mmHg, P = 0.001)decreased significantly. One patient died of pulmonary embolism and one died of intracerebral bleeding three days after the procedure. Conclusion Interventional embolectomy is an effective and safe technique for the treatment of acute massive pulmonary embolism.

Objective To evaluate the diagnostic value and technique advantage of 16-slice CT angiography(16SCTA) in aortic dissection.Methods 39 cases of aortic dissection underwent 16SCTA.The data were reconstructed by multiplanar reconstruction(MPR),curved planar reconstruction(CPR),volume rendering(VR),maximum intensity projection(MIP),virtual endoscopy(VE),and generally analyzed in combination with original axial images.Results According to DeBakey's classification,DeBakey's type Ⅰ in 5 cases,type Ⅱ in one case and type Ⅲ in 33 cases were founed in the 39 cases.16SCTA clearly showed that including the ture and false lumen(39 cases,100%),intimal flaps(39 cases,100%),intimal tear(25 cases,64.1%),and thrombus inside the false lumen(17 cases,43.6%).Conclusion 16SCTA may be as the first choice method in diagnosis of aoric dissection,and which is considered as having great value.

OBJECTIVE To study the correlation between color and inner quality during the processing of Prunus mume carbon， and provide reference for the determination of processing end point of P. mume carbon. METHODS The chromaticity value of P. mume carbon powder was measured by colorimeter， and the inner quality of P. mume carbon was measured by selecting the contents of water， water-soluble extract， citric acid and tannin. The dynamic change trend of the chromaticity value， water， water- soluble extract， the contents of citric acid and tannin in P. mume carbon under different processing time was analyzed. The correlation between color and the above indexe contents was analyzed， and the regression equation of inner quality-chromaticity value was established. Combined with principal component analysis （PCA）， hierarchical cluster analysis （CA） and partial least squares discriminant analysis （PLS-DA）， the difference of P. mume carbon at different processing times was analyzed to determine the processing end point. RESULTS With the extension of processing time， the sample color gradually deepened； the chromaticity values L* and E* of the samples increased at first and then decreased， the chromaticity values a* and b* decreased， and finally all tended to be stable. The content of water-soluble extract， citric acid and tannin in the sample increased at first and then decreased， the water content of the sample decreased with time and finally stabilized. Correlation analysis showed that water， water-soluble extract， citric acid and tannin were positively correlated with L*， a*， b* and E*（P＜0.001）. PCA and HCA showed that P. mume carbon under different processing time could be clustered into two categories： the processed samples of 0-30 min and those of 40-60 min. PLS-DA showed that water and water-soluble extract were important quality indexes and b* was an important chrominance index in the processing of P. mume carbon. The chromaticity value of the samples processed for 50 min and 60 min were not significantly different. The contents of water， water- soluble extract， citric acid and tannin in the samples processed for 60 min were less than those processed for 50 min. CONCLUSIONS There is a certain correlation between the color and the inner quality of P. mume carbon. The processing time of P. mume carbon should be 40-50 min.