RT Journal Article SR Electronic T1 A nomogram for venous shunt (Qs/Qt) calculation JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 563 OP 565 DO 10.1136/thx.23.5.563 VO 23 IS 5 A1 S. T. Chiang YR 1968 UL http://thorax.bmj.com/content/23/5/563.abstract AB 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.