人感染H7N9禽流感的胸部影像特点

The chest imaging features of H7N9 subtype human avian influenza

目的探讨人感染H7N9禽流感的胸部影像表现。方法搜集7例经临床确诊为人感染H7N9禽流感患者的临床和影像学资料，分析其胸部影像表现。发病初期主要临床表现有发热（7例）和咳嗽（4例）。结果人感染H7N9禽流感发病初期（〈3d）5例表现为局限于肺段或肺叶分布的磨玻璃影或实变灶，其中3例不跨越叶间裂，4例内有明显的空气支气管征；进展期（3～6d）病变迅速发展至两肺，呈多发或弥漫分布（7例），此期死亡4例；余3例患者中2例吸收期（7～15d）病灶部分吸收后显示为条索状、网格状及蜂窝状影。结论人感染H7N9禽流感主要影像表现为肺段或肺叶性渗出性病变，并迅速进展为两肺弥漫分布，影像学检查有助于掌握病情变化。

Objective To investigate the chest imaging features in H7N9 subtype human avian influenza. Methods The clinical and imaging data of 7 patients with HTN9 subtype avian influenza were collected and the chest imaging manifestations were analyzed. Results The main clinical symptoms of H7N9 patients were fever （ n = 7 ） and cough （ n = 4 ）. The ground-glass opacities or consolidations in pulmonary segmental or lobar distribution were showed （n =5 ） at the initial stage （within 3 days ）. Air bronchogram could be found in 4 cases. The bilateral lungs were rapidly involved with multiple or diffuse distribution （n = 7 ） at the progressive stage （3--6 days ）, and 4 patients were died at this stage. The linear, reticular and honeycomb shadows were seen with partial absorption of lesions （ n= 2）. Conclusion The main imaging features of H7N9 subtype human avian influenza are the segmental or lobar consolidations on the initial stage and rapid involvement of bilateral lungs with disease progression.