Mitochondria are the cells' powerhouse that produce the ubiquitous energy currency (ATP) by consuming oxygen, producing water and building up the proton motive force. Oxygen consumption is a classical means of assessing energy expenditure, one component of energy balance. When energy balance is positive, weight increases. This is observed during the dynamic phase of obesity, and during body com...

Tissue oxygen tension is the partial pressure of oxygen within the interstitial space of an organ bed. As it represents the balance between local oxygen delivery and consumption at any given time, it offers a ready monitoring capability to assess the adequacy of tissue perfusion relative to local demands. This review covers the various methodologies used to measure tissue oxygen tension, descri...

An analytical model is developed that describes oxygen transport and oxygen consumption for small biological structures without a circulatory system. Oxygen inside the organism is transported by diffusion alone. Oxygen transfer towards the organism is retarded by a thin static fluid film at the surface of the organism. The thickness of this film models the outward water conditions, which may ra...

This is the first investigation of right ventricular (RV) myocardial oxygen supply/demand balance in a conscious animal. A novel technique developed in our laboratory was used to collect right coronary (RC) venous blood samples from seven instrumented, conscious dogs at rest and during graded treadmill exercise. Contributions of the RV oxygen extraction reserve and the RC flow reserve to exerci...

Treatment and outcome of childbirth depend on the acidobasic balance of the fetal blood related to the oxygen and carbon dioxide level. Hypoxemia could lead to asphyxia that is why fetal monitoring and biochemical parameters assessment are mandatory. Although there are compensatory mechanisms that temporarily protect the fetus, there are also other factors that interfere with the oxygenation of...

Cerebral oxygenation is not always reflected by systemic arterial oxygenation. Therefore, regional cerebral oxygen saturation (rScO2) monitoring with near-infrared spectroscopy (NIRS) is of added value in neonatal intensive care. rScO2 represents oxygen supply to the brain, while cerebral fractional tissue oxygen extraction, which is the ratio between rScO2 and systemic arterial oxygen saturati...

It is well establish that is direct relationship between oxygen uptake and sodium transport in the kidney. More than 60% of glomerular filtrate with its sodium content is reabsorbed in the proximal tubular cells, and half of that is transported due to Na, K-ATPase activity localized in antiluminal membranes of the cells. Oxidative metabolism is the major source of energy for proximal tubular ce...

Introduction: Ozone affects blood oxygen transport and the pro-oxidant-antioxidant balance. However, role of formed elements gas transmitters in these processes still remains unclear. The aim present study was to investigate effect ozone on balance a red cell suspension. Methods: suspension incubated with at concentration 6 mg/l substances affecting synthesis (nitroglycerin, sodium hydrosulfide...