All together data indicates that young boys bearing HFE mutations demonstrated lower aerobic performance and lower aerobic power then their contemporary age match, whereas ventilator efficiency described by relation between minute ventilation
and carbon dioxide production was comparable between the groups (Table 3).
During the study the minute ventilation
, VE is graphed on the Y axis and PCO2 or carbon dioxide concentration recorded on the X axis.
No significant differences were found for breathing rate (BR), tidal volume (VT), and minute ventilation
(VE), but a tendency for higher values in hypoxia was observed that supports findings of previous studies (Angermann et al., 2006; Benoit et al., 2003; Calbet and Lundby, 2009).
If the measured PetC[O.sub.2] or the spontaneous respiratory rate is higher than the set upper limit threshold, the ventilator will automatically increase the target minute ventilation
, which is met by automatically increasing the respiratory rate or the inspiratory pressure.
(VE) increased similarly across Test Minute between the Study Visits.
Technical considerations related to the minute ventilation
/ carbon dioxide output slope in patients with heart failure.
By multiplying the breaths/min by the [V.sub.T], the minute ventilation
(Ve) can be determined, and in this instance, it is 6 to 6.5 liters/minute.
The following parameters were recorded: heart rate (HR), minute ventilation
(VE), tidal volume (TV), peak oxygen consumption (V[O.sub.2] peak), peak oxygen consumption/kg (V[O.sub.2] peak/kg), %V[O.sub.2] predicted, slope of relation between minute ventilation
and C[O.sub.2] production (VE/VC[O.sub.2] slope), VE/VC[O.sub.2] ratio at anaerobic threshold, respiratory rate (RR), oxygen pulse (O2P), oxygen saturation at peak exercise (SpO2 peak), anaerobic threshold (AT), breathing reserve (BR), heart rate recovery (HRR), and heart rate reserve (HRRes).
Factors behind the increased vulnerability include their small mass for a given dose of food or water contamination, increased transdermal absorption due to thinner skin and increased surface-area-to-mass ratio, more hand-to-mouth activity, more time spent on the ground, higher relative minute ventilation
, and a longer window of exposure due to their longer life expectancy compared with adults, said Dr.
2010), we found that both the ventilation rate and the tidal volume were increased and that minute ventilation
was 4.3 times higher in cyclists compared with car passengers (similar to the ratio of metabolic rates).
was calculated for the last minute of exercise.
As a consequence of these changes a small fall in minute ventilation
of around 10 per cent occurs in normal subjects from wakefulness to non-rapid eye movement (NREM) sleep, resulting in a small rise in PaC[O.sub.2] and reduction in oxygen saturation (Sp[O.sub.2]) (2).