Lee K N, Lee H J, Shin W W, Webb W R
Department of Diagnostic Radiology, Dong-A University College of Medicine, Seo-Ku, Pusan, Korea.
Radiology. 1999 May;211(2):549-53. doi: 10.1148/radiology.211.2.r99ma46549.
To evaluate the pulmonary vasculature in patients with hepatopulmonary syndrome.
Conventional computed tomographic (CT) scans in eight patients with hepatopulmonary syndrome were retrospectively evaluated to compare the diameters of the pulmonary trunk, right and left main pulmonary arteries, and peripheral pulmonary vasculature in the right posterior basal segment with those in eight healthy subjects and in four patients with normoxemic cirrhosis. With thin-section CT, the ratio of segmental arterial diameter to adjacent bronchial diameter in the right lower lobe in four patients with hepatopulmonary syndrome was compared with that in four patients with normoxemic cirrhosis.
In patients with hepatopulmonary syndrome, the peripheral pulmonary vasculature was significantly dilated compared with that in control subjects and in patients with normoxemic cirrhosis (P = .002); however, the central pulmonary arteries were not significantly dilated (P > .05). At thin-section CT, the ratio of segmental arterial diameter to adjacent bronchial diameter was significantly greater than that in patients with normoxemic cirrhosis (P < .05).
In patients with hepatopulmonary syndrome, the peripheral pulmonary vasculature is significantly dilated. Dilatation of the peripheral pulmonary vasculature may be helpful in the diagnosis of hepatopulmonary syndrome.
评估肝肺综合征患者的肺血管系统。
回顾性分析8例肝肺综合征患者的常规计算机断层扫描（CT）图像，比较其肺动脉主干、左右主肺动脉以及右后基底段外周肺血管的直径与8例健康受试者及4例氧分压正常的肝硬化患者的相应指标。采用薄层CT，比较4例肝肺综合征患者右下叶节段性动脉直径与相邻支气管直径的比值和4例氧分压正常的肝硬化患者的该比值。
与对照组及氧分压正常的肝硬化患者相比，肝肺综合征患者的外周肺血管明显扩张（P = .002）；然而，中央肺动脉无明显扩张（P > .05）。在薄层CT上，节段性动脉直径与相邻支气管直径的比值显著高于氧分压正常的肝硬化患者（P < .05）。
肝肺综合征患者的外周肺血管明显扩张。外周肺血管扩张可能有助于肝肺综合征的诊断。
