. Author manuscript; available in PMC: 2015 Jul 1.

Published in final edited form as: Respir Physiol Neurobiol. 2014 Apr 4;198:13–19. doi: 10.1016/j.resp.2014.03.013

Table 2.

Changes in end-tidal (E.T.) temperature and CO₂ concentration caused by hyperventilation of humidified air at room (RA) and high temperature (HA).

AR patients (n=7)

	E.T. Temperature (°C)		E.T. CO₂ (%)

	Before	During	Before	During
RA	33.59 ± 0.29	32.79 ± 0.19^*	4.96 ± 0.26	4.94 ± 0.17
HA	33.50 ± 0.31	35.00 ± 0.09^*^†	5.14 ± 0.43	5.18 ± 0.47

Healthy subjects (n=6)

	E.T. Temperature (°C)		E.T. CO₂ (%)

	Before	During	Before	During
RA	33.63 ± 0.35	32.56 ± 0.35^*	4.88 ± 0.20	5.15 ± 0.33
HA	33.13 ± 0.27	34.49 ± 0.30^*^†	4.93 ± 0.20	5.11 ± 0.24

Measurements were made before and at 2 minutes after the beginning of the 4-minute hyperventilation; the latter was measured immediately after the hyperventilation was interrupted for 3-6 breaths while the subject breathed room air during these measurements.

Significant difference between before and during the hyperventilation challenge.

^†

Significant different from the corresponding RA data.