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2 dni temu · Oxygen toxicity is a condition resulting from the harmful effects of breathing molecular oxygen ( O. 2) at increased partial pressures. Severe cases can result in cell damage and death, with effects most often seen in the central nervous system, lungs, and eyes.
1 dzień temu · The atmosphere of Earth is the planetary atmosphere of Earth, composed of a layer of gas mixture that surrounds the Earth's planetary surface (both lands and oceans ), known collectively as air, with variable quantities of suspended aerosols and particulates (which create weather features such as clouds and hazes ), all retained by Earth's gravity.
4 dni temu · 1) O2 transport in blood w/o Hb (alveolar PO2 = arterial PO2) - oxygen content remains low because it's only be transported dissolved in plasma 2) O2 transport with normal PO2 and Hb - Oxygen transported dissolved in plasma AND RBCs (majority) - Produces extra O2 than needed by tissue at rest, so the extra amount serves as reserve for times ...
5 dni temu · In healthy people under ideal circumstances, PaO 2 can be maintained at >100 mm Hg for up to 100 minutes without a single breath, although the lack of ventilation will eventually cause marked hypercapnia and significant acidosis
4 dni temu · In children, pulse oximetry is often used to grade severity of acute asthma. Oxygen saturation of 97% or above constitutes mild asthma, 92-97% constitutes moderate asthma, and less than 92%...
3 dni temu · This hyperventilation helps to maintain arterial PO2 and PCO2 close to normal levels. This compensation is crucial and operates effectively, so when monitoring arterial PO2, PCO2, ... The normal value of oxygen saturation in average arteries is above 97% . Advertisement. 5. Application of cardiorespiratory testing in physical activities
6 dni temu · \(P\) is the arterial pO2 (in mmHg), \(F\) is the fraction of inspired oxygen (FiO2), expressed as a decimal. Example Calculation. Consider a patient with an arterial pO2 of 100 mmHg breathing 50% oxygen. The PF ratio is calculated as: \[ \text{PFR} = \frac{100}{0.50} = 200 \] Importance and Usage Scenarios
