45-degree head-up tilt

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Oxygen Therapy Delivery and Body Position Effects Measured With Electrical Impedance Tomography
Zhiyong Yuan, Xiaoning Han, Lisha Wang, Ping Xue, Yunbo Sun, Inéz Frerichs, Knut Möller, Jinyan Xing and Zhanqi Zhao

Respiratory Care March 2020, 65 (3) 281-287; DOI: https://doi.org/10.4187/respcare.07109