Mixed Venous Composition, V/Q Distributions and Gas Exchange
This simulation examines the effects of mixed venous composition
and the shape of the V/Q distribution on the arterial blood
gases and several other gas exchange parameters. It uses an 11
compartment model and each compartment has a unique V/Q ratio
ranging from zero to infinity.  First, create the V/Q
distribution by adjusting the perfusion (%Q) to each compartment
below. Click on the compartment perfusion bar and drag it
horizontally until the desired fractional perfusion is achieved.
The total fractional distribution will always sum to one, so
increasing the fractional perfusion to one compartment will
automatically decrease the fractional perfusion of the other
compartments proportionally. To lock any compartment perfusion
at a given value, click on the associated lock. The deadspace
compartment (V/Q=infinity) is unperfused; its slider specifies
the fraction of total ventilation that is distibuted to the
deadspace compartment and does not affec