Inaccuracy of noninvasive estimates of VD/VT in clinical exercise testing.

@article{Lewis1994InaccuracyON,
  title={Inaccuracy of noninvasive estimates of VD/VT in clinical exercise testing.},
  author={Dr. Carol A. Lewis and Kathy E. Sietsema and Richard H Casaburi and Darryl Y. Sue},
  journal={Chest},
  year={1994},
  volume={106 5},
  pages={1476-80}
}
To evaluate the accuracy of noninvasive estimates of VD/VT in clinical exercise testing, we compared measurements of standard VD/VT with estimates based either on end-tidal CO2 (VD/VTET) or a published estimate of arterial PCO2 (VD/VTest) at peak exercise in 68 patients. Using regression analysis, we identified highly significant differences (p < 0.001) between each method and VD/VTstand across a broad range of observed VD/VT. Assuming a normal exercise VD/VT < or = 0.30, estimate methods were… CONTINUE READING

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