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Figure 1 | Critical Care

Figure 1

From: The influence of venous admixture on alveolar dead space and carbon dioxide exchange in acute respiratory distress syndrome: computer modelling

Figure 1

Simplified lung model. Total cardiac output (Qt) was distributed to ventilated capillaries (QA) and to a right-to-left shunt (Qs). At steady state the alveolar carbon dioxide tension (PaCO2) is the same as in the end-capillary blood (PcCO2). V'CO2, eliminated carbon dioxide (ml/minute); pHv, venous pH; PvCO2, venous carbon dioxide tension; PaCO2, arterial carbon dioxide tension.

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Critical Care

ISSN: 1364-8535