REBREATHING METHOD FOR MEASURING CARBON-MONOXIDE DIFFUSING-CAPACITY - SUPPLEMENT TO SINGLE-BREATH METHOD

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Abstract
The method can be used in patients whose vital capacity is too small, or whose cooperation is inadequate, for the single-breath method. The apparatus is simple and the same gas mixtures are used as for the single-breath method. The results obtained by the rebreathing method are similar to those by the single-breath method (80% of the results by the rebreathing method lie within 20% of the value by the single-breath method). The rebreathing method also provides a measurement of the functional residual capacity.