“Comparison of Oxygen Saturation Values Between Apple Watch Ultra® and Conventional Commercial Oximeters in Pediatric Patients With Cardiopulmonary Disease Treated at Mario Catarino Rivas Hospital, January–June 2024”. Respirar 17, no. 3 (October 11, 2025): 297–306. Accessed August 23, 2026. https://respirar.alatorax.org/index.php/respirar/article/view/281.