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Thorax. Sep 1968; 23(5): 563–565.
PMCID: PMC471848

A nomogram for venous shunt (Qs/Qt) calculation

Abstract

A nomogram for calculating venous shunt has been devised. The details of the derivation of the shunt formula according to which the nomogram is prepared have been reviewed. The simplicity of shunt study using the O2 breathing method and the example for using this nomogram are described.

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Selected References

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  • FARHI LE, RAHN H. A theoretical analysis of the alveolar-arterial O2 difference with special reference to the distribution effect. J Appl Physiol. 1955 May;7(6):699–703. [PubMed]
  • RILEY RL, COURNAND A. Analysis of factors affecting partial pressures of oxygen and carbon dioxide in gas and blood of lungs; theory. J Appl Physiol. 1951 Aug;4(2):77–101. [PubMed]
  • SEVERINGHAUS JW, BRADLEY AF. Electrodes for blood pO2 and pCO2 determination. J Appl Physiol. 1958 Nov;13(3):515–520. [PubMed]

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