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Chest. 1975 Jun;67(6):680-4.

Mortality prediction in adult respiratory insufficiency.


The results of treatment of acute respiratory insufficiency in the adult must be quantitated before indications for innovative treatment (such as extracorporeal oxygenation) can be defined. A method for retrospective and prospective data collection based on a graph of A-a gradient and time was evaluated in 45 patients. From this graph a pulmonary insufficiency index (PII) can be calculated which correlates well with mortality in this series. The mean PII of surviving patients was 0.84 and the highest value was 2.75. The mean PII of patients who died with pulmonary insufficiency was 15.9; the lowest value was 6.0. Using this method with a larger data base, it will be possible to predict mortality based on PII facilitating the study of ongoing management and innovative treatment methods.

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