nitrogen washout
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Nitrogen washout — (or Fowler s method) is a test for measuring dead space in the lung during a respiratory cycle, as well as some parameters related to the closure of airways. Contents 1 Procedure 2 Parameters 3 See also 4 References … Wikipedia
nitrogen washout test — (for functional residual capacity of lungs) with the patient inhaling pure oxygen, the concentration of exhaled nitrogen is obtained for each breath until it falls below 1 per cent of the gas being exhaled (usually about seven minutes time); the… … Medical dictionary
nitrogen washout test single breath — the patient inhales a vital capacity s volume of pure oxygen and then slowly exhales. The nitrogen concentration of the exhaled gas is measured over the entire breath and a curve is generated; different parts of the curve represent nitrogen… … Medical dictionary
Spirometry — TLC Total lung capacity: the volume in the lungs at maximal inflation RV Residual volume: the volume of air remaining in the lungs … Wikipedia
Perfluorocarbon — derivatives are perfluorocarbons with some functional group attached, for example perfluorooctanesulfonic acid. Perfluorocarbon derivatives can be very different from perfluorocarbons in their properties, applications and toxicity.The term… … Wikipedia
Oxygen toxicity — Classification and external resources In 1942–43 the UK Government carried out extensive testing for oxygen toxicity in divers. The chamber is pressurised with air to 3.7 … Wikipedia
Fowler method — Fowler s method, or the nitrogen washout method, is a way of measure dead space in the lung during a respiratory cycle. A subject takes a breath of 100% oxygen and exhales through a one way valve measuring nitrogen content and volume. A nitrogen… … Wikipedia
Dead space (physiology) — Blood gas, acid base, gas exchange terms PaO2 Arterial oxygen tension, or partial pressure PAO2 Alveolar oxygen tension, or partial pressure PACO2 Arterial carbon dioxide tension, or partial pressure PaCO2 Alveolar carbon dioxide tension, or… … Wikipedia
Hemoglobin — Hemoglobin, human, adult (heterotetramer, (αβ)2) Structure of human hemoglobin. The protein s α and β subunits are in red and blue, and the iron containing heme groups in green. Fro … Wikipedia
Breathing — Breath redirects here. For other uses, see Breath (disambiguation). For other uses, see Breathing (disambiguation). The human respiratory system Breathing is the process that moves air in and out of the lungs. Aerobic organisms require oxygen to… … Wikipedia
