8. Lellouche F, L'her E. Automated oxygen flow titration to maintain constant oxygenation.
Experiments were conducted in 400 litres cylindrical tanks connected to a re-circulation unit in order to maintain constant water temperature and dissolved oxygen over 85% saturation.
Paddlefish are oxygen regulators and maintain constant respiration rates from 150 mm Hg to 90 mm Hg [ 8].
FreeO2 is a recently developed device that automatically titrates oxygen flowrate with the aim to maintain constant the SpO2, around the target set by the physician.
During nitrogen administration to the healthy subjects, with the new prototype controlling oxygen/air administration, the oxygen increases (leading to a FiO2 increase) to maintain constant the SpO2 level (set at 96%% in this study), and the air flow decreases to maintain constant the total flow (30L/min).
During nitrogen administration to the healthy subjects, with the new prototype controlling oxygen/air administration, the oxygen increases (leading to a Fi02 increase) to maintain constant the Sp02 level (set at 94% in this study), and the air flow decreases to maintain constant the total flow (30L/min).
Accordingly, the arrow in Fig. 5A illustrates how left ventricle can maintain constant OEFmax during several-fold increases in MBF without reductions in myocardial oxygen tension [ 28].
Positive end-expiratory pressure, inspiratory oxygen fraction, minute ventilation, and duty cycle remained constant throughout the study, while respiratory rate was modified to maintain constant minute ventilation.
In contrast, the response of M010b to hypoxic challenge was to maintain a constant oxygen consumption rate and to increase mitochondrial membrane potential (i.e., mitochondrial proton pumping).
Immediately prior to irradiation, flasks were completely filled with 2D Chondrocyte Basal Medium (#410PR-500) previously balanced with 2 % O2, and then sealed in order to maintain a constant oxygen tension.
