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Raffaele Antonelli Incalzi et al found out that the Cox regression analysis identified S1S2S3 pattern, right atrial overload (RAO), and alveolar-arterial oxygen gradient (PA[O.sub.2]-Pa[O.sub.2]) >48 mmHg during oxygen therapy as the strongest predictors of death.
FVC = forced vital capacity; FEV1 = forced expiratory volume in 1 s; TLC = total lung capacity; RV = residual volume; DLco = diffusing capacity of the lung for carbon monoxide; Sp[O.sub.2] = arterial oxygen saturation measured by pulse oximetry; A-aD[O.sub.2] = alveolar-arterial oxygen difference; ANA = antinuclear antibody; KL-6 = Krebs von den Lungen- 6; SP = surfactant protein; GAP = (gender (G), age (A), and two lung physiology variables (P) (FVC and DLco)).
a/A ratio: arterial-alveolar oxygen tension ratio; A-a[O.sub.2]: alveolar-arterial oxygen tension difference; Hb: hemoglobin; I/R: ischemia-reperfusion; PaC[O.sub.2]: arterial partial pressure of carbon dioxide; Pa[O.sub.2]: arterial partial pressure of oxygen; RI: respiratory index; TEAS: transcutaneous electrical acupoint stimulation.
His lactate dehydrogenase level was 245 [micro]/l(<201 [micro]/l), and arterial blood gas revealed an elevated alveolar-arterial gradient of 31 mmHg.
Arterial oxygenation and alveolar-arterial gradients in termpregnancy.
The elevated alveolar-arterial oxygen difference demonstrates increased physiological shunting superimposed on chronic hypoventilation.
A CRF e menor em pacientes obesos, pois o gradiente de oxigenacao alveolar-arterial (A-aD[O.sub.2]) e maior, e a pressao intra- abdominal e mais alta.
Alveolar-arterial oxygen difference (AaD[O.sub.2]) was obtained by the formula AaD[O.sub.2]=(713xFi[O.sub.2]-PaC[O.sub.2]/0.8)-[P.sub.a][O.sub.2].
Any alveolar-arterial differences in P[O.sub.2] and P[CO.sub.2] greatly influence total stores, especially [CO.sub.2]s, but the effect on store differences is smaller, somewhat similar to changing values for the other components.
This causes a widened age-corrected alveolar-arterial oxygen gradient.
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