Was higher in the group of nocturnal desaturators than in the group of nondesaturators (10 patients) and nondesaturators (3 patients) were FEV 1 (70.1 ± 9.1% predicted vs 98.1 ± 15.1% predicted, respectively p = 0.002), resting Approximately 60 patients without exertional hypoxia had. The mean (± SD) variables that were significantly different between desaturators Nocturnal hypoxemia is common in PAH patients and correlates with advanced pulmonary hypertension and right ventricular dysfunction. Hypoxemia causes pulmonary vasoconstriction and elevated. OSA participants with severe nocturnal hypoxemia demonstrated improved renal hemodynamics and reninangiotensinaldosterone system activity as. METHODS: Nocturnal pulse oximetry (S pO 2) and transcutaneous carbon dioxide (P tcCO 2) recordings with simultaneous actigraphy were performed in 38 children with nocturnal hypoxemia and hypercapnia during spontaneous breathing (nocturnal hypoventilation NH group), 25 children with partially corrected nocturnal hypoventilation (PC-NH group), and 11 subjects with normal nocturnal gas exchange. Had normal apnea indexes, but two had mild elevations of the hypopnea index ( 25% of sleep time with Sp o 2 < 90%. Nocturnal hypoxemia can lead to polycythemia, respiratory failure, and pulmonary hypertension. Nocturnal hypoxemia is a common consequence of untreated obstructive sleep apnea which has been associated with reninangiotensinaldosterone system activation and loss of kidney function. The aim of the study was to assess if there is also a correlation between nocturnal hypoxemia and hypercapnia and sleep efficiency and sleep fragmentation in children. The purpose of this study was to measure the prevalence of respiratory disturbances and nocturnal hypoxemia during the sleep of. BACKGROUND: A correlation has been observed between obstructive sleep events and sleep quality. Hypoxemia is determined by measuring the oxygen level in a blood sample taken from an artery (arterial blood gas). Hypoxemia is a sign of a problem related to breathing or circulation, and may result in various symptoms, such as shortness of breath. Sleep in patients with primary pulmonary hypertension (PPH) has not been studied (to our knowledge). Hypoxemia is a below-normal level of oxygen in your blood, specifically in the arteries. Of the 13 patients in the study, 10 (77%) were nocturnal desaturators. Unsuspected sleep-related respiratory events are common in patients with severe pulmonary disease.