Case report highlights delayed decline of oxygen saturation in a patient with haemoglobinopathy, suggesting complex interactions with inferior vena cava obstruction.
Although inherited haemoglobinopathies may indicate low oxygen saturation measured by pulse oximetry (SpO2), the timing and mode of its decline after birth are unclear. Here, we present a patient with haemoglobin Köln disease who developed unexpected decline in SpO2 more than two years after heart surgery. Due to simultaneous identification of inferior vena cava stenosis, the differential diagnosis became complicated.
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Matsuo et al. (2025) studied this question.
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