For example, Olympic Nordic combined and cross-country skiers, who sustain high levels of ventilation (up to 200 l/min) for prolonged periods and who compete often in very low ambient temperatures have a prevalence of asthma/AHR of ∼15%.
To minimise the effect of this on our observations, all measurements were made after at least 20 minutes breathing ambient air at which time any additional oxygen would have been "washed out" by the high levels of ventilation that occur at such altitudes [ 25].
This is because low machine-yield cigarettes tend to have higher levels of filter ventilation; and with closed-end smoke measurement systems, a higher level of filter ventilation encourages a greater extent of build up of the volatile species during smouldering more work is needed to confirm this quantitatively.
For example, a disconnection of the patient from the ventilator produces the same audible alarm as a high level of minute ventilation.
This technique has been already validated in Controlled Mechanical Ventilation (CMV) and at high level of Pressure Support Ventilation (PSV) [2].
The paper examines the feasibility of using transparent micro-perforated absorbers (MPA) in a window system to allow noise attenuation whilst at the same time maintaining high levels of comfort ventilation and daylighting.
In this work, using a two-dimensional computational fluid dynamics model with time-dependent boundary conditions (i.e. an unsteady model), the homogeneity of the distribution of the air velocity in an industrial meat dryer is discussed for several low and high levels of the ventilation cycle, and two forms of this cycle (linear and sinusoidal).
In children with acute lung injury, there is an increase in minute ventilation ( ˙Ve) and inefficient gas exchange due to a high level of physiologic dead space ventilation (Vd/Vt).
Moreover, it is able to guarantee the desired inhaled oxygen fraction (FiO2) even at high level of patient's minute ventilation by minimizing the room air entrainment.
