Bedont R A, Datz F L
AJR Am J Roentgenol. 1985 Dec;145(6):1155-7. doi: 10.2214/ajr.145.6.1155.
Patients with a new pleural effusion are often sent for a ventilation-perfusion scan to exclude a pulmonary embolism. This retrospective study assessed the probability of pulmonary embolism when a pleural effusion and a perfusion defect of similar size are the only significant imaging abnormalities. In 451 reports of patients who were scanned for suspected pulmonary embolism, 53 had perfusion defects secondary to pleural effusion without other significant perfusion defects. Using pulmonary angiography, venography, analysis of pleural fluid, clinical course, and other radiographic and laboratory studies to establish the final diagnosis, only two patients had documented venous thrombotic disease: one had pulmonary emboli, the other thrombophlebitis. Lung scans having significant perfusion defects limited to pleural effusions and matching them in size have a low probability for pulmonary embolism.
新发胸腔积液的患者常被送去做通气灌注扫描以排除肺栓塞。这项回顾性研究评估了在胸腔积液和大小相似的灌注缺损是唯一显著影像异常时发生肺栓塞的可能性。在451例因疑似肺栓塞而接受扫描的患者报告中，53例有继发于胸腔积液的灌注缺损，无其他显著灌注缺损。采用肺血管造影、静脉造影、胸腔积液分析、临床病程以及其他影像学和实验室检查来确定最终诊断，只有2例有记录的静脉血栓形成疾病：1例有肺栓塞，另1例有血栓性静脉炎。肺部扫描显示显著灌注缺损仅限于胸腔积液且大小与之匹配时，发生肺栓塞的可能性较低。
