Wagner, PD; Laravuso, RB; Uhl, RR; West, JB (1974). "Continuous distributions of ventilation-perfusion ratios in normal ... denotes the ratio of alveolar ventilation to cardiac output For the purposes of utilizing the MIGET, the equations have been ... Wagner, PD; Saltzman, HA; West, JB (1974). "Measurement of continuous distributions of ventilation-perfusion ratios: theory". J ... The technique quantifies true shunt, physiological dead space ventilation, ventilation versus blood flow (VA/Q) ratios, and ...

Optimal PEEP is used to maintain alveolar inflation and promote ventilation-to-perfusion matching. Jet ventilation has been ... E ratio (positive-oscillation/negative-oscillation ratio), fresh gas flow (called bias flow), and FiO2. Increases in continuous ... Jet ventilators utilize various I:E ratios-between 1:1.1 and 1:12-to help achieve optimal exhalation. Conventional mechanical ... Transtracheal jet ventilation refers to a type of high-frequency ventilation, low tidal volume ventilation provided via a ...

... and measure the ventilation/perfusion ratio. This technique may be critical for the diagnosis and treatment management of ... lowering the total 3He/4He ratio to around 20 ppm. Ratios of 3He/4He in excess of atmospheric are indicative of a contribution ... This ratio is about 1:10,000, or 100 parts of 3He per million parts of 4He. This is roughly the same ratio of the isotopes as ... 3He has a cosmological ratio of 300 atoms per million atoms of 4He (at. ppm), leading to the assumption that the original ratio ...

If the transport of nitrogen into the vascular compartment by perfusion exceeds removal of helium by perfusion, while transfer ... Ventilator-induced lung injury (VILI) is a condition caused by over-expansion of the lungs by mechanical ventilation used when ... Body tissues include aqueous and lipid components in varying ratios, and the solubility of the gases involved in decompression ... using user-input diluent composition which defines the ratio of nitrogen to helium, and the measured instantaneous oxygen ...

The ratio of xenon-136 to xenon-135 (or its decay products) can give hints as to the power history of a given reactor and the ... Isotope ratios of xenon produced in natural nuclear fission reactors at Oklo in Gabon reveal the reactor properties during ... Driehuys, B.; Möller, H.E.; Cleveland, Z.I.; Pollaro, J.; Hedlund, L.W. (2009). "Pulmonary perfusion and xenon gas exchange in ... When a patient inhales hyperpolarized xenon-129 ventilation and gas exchange in the lungs can be imaged and quantified. Unlike ...