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CT angiography of pulmonary embolism using a 64 slice multi-detector scanner

Chinese Medical Journal 2009年第20期122卷 2509-2515页

作者： QIN Nai-shan JIANG Xue-xiang QIU Jian-xing ZHU Ying WANG Ji-chen Department of Radiology Peking University First Hospital Beijing 100034 China

Background Multi-detector computed tomography （MDCT） has already been the first line investigation method for diagnosis of pulmonary embolism （PE）. Reducing the amount of contrast medium used during CT scanning could decrease the incidental rate of adverse reactions. Our study amied to evaluate the image quality of pulmonary arteries using 64 slice multi-detector CT with small volumes of contrast media injection. Methods Forty nonconsecutive patients without PE or other lung diseases were randomly assigned to two groups. Group A underwent CT scanning with 16×1 .25 mm collimation and a 70 ml contrast injection, while group B had CT with 64×0.625 mm collimation and 20 ml of contrast injection. Two readers independently depicted the segmental and subsegmental pulmonary arteries. Reasons we could not analyze the pulmonary artery or that led to misdiagnosis of pulmonary embolism were evaluated, including the degree of contrast enhancement of the main pulmonary artery, and factors that caused misdiagnosis of PE （flow-related artifacts, partial volume artifact, beam-hardening artifacts and enhancement of pulmonary vein）. The independent samples t-test, Mann-Whitney U test and Pearson chi-square test were applied. Results There were no significant differences in image quality of segmental and subsegmental arteries between the two groups. No significant difference was found for factors that made pulmonary arteries non-analyzable or in the misdiagnosis of PE, except the degree of contrast enhancement. Conclusion 64×0.625 mm collimation with 20 ml contrast injection could depict the pulmonary arteries well.

关键词： computed tomographic pulmonary angiography pulmonary embolism pulmonary arteries contrast media

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Fistulectomy as a surgical option for pulmonary arteriovenous malformation

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中华医学杂志(英文版) 2009年第19期122卷 2321-2324页

作者： ZHANG Shao-yan ZHANG Zhi-tai OU Song-lei HU Yan-sheng SONG Fei-qiang LI Xin MA Xu-chen MA Xin-xin LIANG Lin LI Dong GUO Lin SUN Zhen Department of Thoracic Surgery Beijing Anzhen Hospital Capital Medical University Beijing 100029 China）

Background Surgical resection remains the treatment of choice for pulmonary arteriovenous malformation butremoves some normal lung *** study aimed to evaluate the effect and safety of the lung-saving procedureof fistulectomy as an alternative to lung *** From July 2003 to July 2008,6 selected patients with pulmonary arteriovenous malformations *** them,1 patient underwent emergency operation and 2 underwent bilateral *** patientreceived postoperative *** No hospital deaths or postoperative morbidity *** significantly after *** were free of symptoms and hypoxia during a follow-up for 9 months to 5 *** Fistulectomy is a safe and effective procedure for patients with pulmonary arteriovenous malformationand may be an alternative to lung resection.

关键词： fistula benign or congenital lesions lung pulmonary arteries

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Fistulectomy as a surgical option for pulmonary arteriovenous nalformation

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Chinese Medical Journal 2009年第19期 2321-2324页

Background Surgical resection remains the treatment of choice for pulmonary arteriovenous malformation but removes some normal lung parenchyma. This study aimed to evaluate the effect and safety of the lung-saving procedure of fistulectomy as an alternative to lung resection. Methods From July 2003 to July 2008, 6 selected patients with pulmonary arteriovenous malformations underwent fistulectomies. Among them, 1 patient underwent emergency operation and 2 underwent bilateral operations. One patient received postoperative embolotherapy. Results No hospital deaths or postoperative morbidity occurred. PaO2 increased significantly after operation. All patients were free of symptoms and hypoxia during a follow-up for 9 months to 5 years. Conclusions Fistulectomy is a safe and effective procedure for patients with pulmonary arteriovenous malformation and may be an alternative to lung resection.

关键词： fistula benign or congenital lesions, lung pulmonary arteries

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