Sumaratih, Luki, Rudyanto Soedono, and Dita Aditianingsih. 2019. “The Comparison of High Flow Nasal Cannula Oxygen and Conventional Oxygen Therapy on Early Effect Hemodynamic Indicators in Post – Upper Abdominal Surgery Patients: A Pilot Study”. Bioscientia Medicina : Journal of Biomedicine and Translational Research 3 (4), 10-20. https://doi.org/10.32539/bsm.v3i4.99.