optional, single

—

The element puts into brackets the amount of air (breathing gas) that can be forced out of the lungs after a maximal inspiration, given in m^3 as a real number.

<examination>

—

<examination>, <totallungcapacity>

(see also <examination>)

<!-- vital capacity of 4.5 litres -->
<vitalcapacity>0.0045</vitalcapacity>