We investigated the effect of modulated metabolic rate (by changing ambient temperature) and modulated spiracular conductance (by blocking all except one spiracles) on gas exchange patterns in Samia pupae.
We expected that these patients would display heterogeneous gas exchange patterns during exercise, which cannot be explained by resting measurements alone.
We hypothesized that we would find characteristic gas exchange patterns that would enable us to discriminate between the different causes of exercise intolerance, based on the exercise pathophysiology.
We hypothesized that some of the patients would show gas exchange patterns during exercise that are characteristically found in patients with overt pulmonary vascular pathophysiology.
However, this is the first study to show that abnormal gas exchange patterns during exercise, characteristic of PV, can be seen in patients with SSc without elevated pulmonary artery pressure on echocardiography or of having pulmonary vascular disease based on clinical suspicion.
The AT could not be determined in 11 patients because of mitigating oscillatory gas exchange patterns or premature end of exercise.
Gas exchange patterns in insects can range from continuous and diffusive ventilation, to discontinuous gas exchange.
However, based on the recovery of P N patterns in both species during the morning hours, we propose that both M. azedarach and S. macrophylla acclimatized to the study site, although they differed in diurnal gas-exchange patterns and drought adaptation strategies.
High flow presents several advantages over conventional 'low-flow' oxygen therapy in terms of humidification, oxygenation, gas exchange, and breathing pattern.
Considering the effect of high frequency oscillatory (HFO) ventilation on gas exchange and breathing pattern, one can hypothesize similar effects with IPV.
