O'Reilly R J, Grollman J H
Circulation. 1976 May;53(5):891-5. doi: 10.1161/01.cir.53.5.891.
Recognition of azygos continuation of the inferior vena cava (AC-IVC) is necessary to prevent unnecessary surgery, to modify the approach to right heart catheterization and to avoid potentially fatal azygos ligation at the time of thoracic surgery. Absence of the inferior vena cava (IVC) shadow on the lateral chest film has been claimed to be an important feature of AC-IVC. Our findings, however, indicate that AC-IVC is frequently associated with a normal appearing IVC shadow on lateral chest film study. When the findings on frontal chest film examination suggest AC-IVC, a caval shadow on the lateral view does not exclude the diagnosis. There persists a need for further radiographic evaluation and, if necessary, angiographic confirmation. The lateral chest film does not provide reliable evidence for or against the diagnosis of azygos continuation of the inferior vena cava.
认识下腔静脉奇静脉延续（AC-IVC）对于避免不必要的手术、调整右心导管检查方法以及避免在胸外科手术时进行可能致命的奇静脉结扎是必要的。有人认为侧位胸片上无下腔静脉（IVC）阴影是AC-IVC的一个重要特征。然而，我们的研究结果表明，AC-IVC在侧位胸片检查中常与外观正常的IVC阴影相关。当前位胸片检查结果提示AC-IVC时，侧位片上的腔静脉阴影并不能排除诊断。仍需要进一步的影像学评估，如有必要，进行血管造影确认。侧位胸片不能为诊断下腔静脉奇静脉延续提供可靠的支持或反对证据。
