1. Interrupted aortic arch without differential cyanosis due to aberrant subclavian artery
- Author
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IGAWA, Yuki, WATANABE, Yoshitaka, MURASE, Masahiko, FUJII, Takanari, IKEDA, Hirokazu, IGAWA, Yuki, WATANABE, Yoshitaka, MURASE, Masahiko, FUJII, Takanari, and IKEDA, Hirokazu
- Abstract
Differential cyanosis indicates a lower percutaneous oxygen saturation (SpO2) level in the lower extremities than in the upper extremities and is generally observed in patients with interrupted aortic arch (IAA). We report a case of the absence of differential cyanosis in a neonate with IAA. A male neonate was born at 38weeks of gestation. Despite routine care, his SpO2 level dropped to 90% at 1h after birth. On admission, there was no evidence of differential cyanosis. Systolic murmur was noted 12h after birth, leading to suspicion of IAA on echocardiography; IAA type B was confirmed by computed tomography. IAA type B occurs between the left carotid artery and left subclavian artery. In our patient, the levels of SpO2 were different between the ear and lower extremities without signs of differential cyanosis because his right subclavian artery branched from the aorta distal to the interruption and left subclavian artery. In conclusion, despite the absence of differential cyanosis and lack of detailed echocardiographic evaluation, careful observation is mandatory. SpO2 measurement in the ear is important to rule out IAA. more...
- Published
- 2023