张力性水胸是一种罕见的紧急情况，可能导致血流动力学不稳定和呼吸受限。紧急医生可以通过实时超声来诊断张力性水胸。我们讨论了协助鉴定的关键超声特征。4例恶性肿瘤病史的患者发现患有张力性水胸，所表现出的共同超声特征包括：巨大的左侧胸腔积液；全面性压迫性肺不张；心脏结构向右侧胸腔移位，导致需要将超声探头放置在右侧以观察心脏。据我们所知，这是文献中第一次描述张力性水胸的实时超声发现特征。

Tension hydrothorax is an uncommon emergent condition in which hemodynamic instability and respiratory compromise may occur. Emergency physicians may diagnose tension hydrothorax by point-of-care ultrasound.We discuss the key sonographic features assisting in identification. Four patients with history of malignancy who were found to have tension hydrothorax exhibited the following common ultrasound findings: massive, left-sided pleural effusion; complete, compressive atelectasis; and shift of cardiac structures into the right hemithorax, resulting in right-sided probe placement to obtain cardiac views.This is the first instance to our knowledge of point-of-care ultrasound findings in tension hydrothorax to be described in the literature.