“…The severity of the patients with TF was directly related to the level of hypoxemia. More pronounced clinical picture of the disease was in patients with oxygen saturation less than 80%, which is consistent with the literature data [1,8,13]. In addition, the severity of patients after PCD (SPA) was more pronounced, which may be associated with early age (up to 3 months), critical condition (desaturation, residual high PG on the RV/PA, the presence of combined pathology, immunodeficiency, etc.…”