The human ventilatory response to stress: rate or depth?
نویسندگان
چکیده
منابع مشابه
Human ventilatory response to CO2 after 8 h of isocapnic or poikilocapnic hypoxia.
During ventilatory acclimatization to hypoxia (VAH), the relationship between ventilation (VE) and end-tidal PCO2 (PETCO2) changes. This study was designed to determine 1) whether these changes can be seen early in VAH and 2) if these changes are present, whether the responses differ between isocapnic and poikilocapnic exposures. Ten healthy volunteers were studied by using three 8-h exposures:...
متن کاملHuman ventilatory response to 8 h of euoxic hypercapnia.
Ventilation (VE) rises throughout 40 min of constant elevated end-tidal PCO2 without reaching steady state (S. Khamnei and P. A. Robbins. Respir. Physiol. 81: 117-134, 1990). The present study investigates 8 h of euoxic hypercapnia to determine whether VE reaches steady state within this time. Two protocols were employed: 1) 8-h euoxic hypercapnia (end-tidal PCO2 = 6.5 Torr above prestudy value...
متن کاملThe divergent ventilatory and heart rate response to moderate hypercapnia in infants with apnoea of infancy.
BACKGROUND Inspired CO2 is a potent ventilatory stimulant exhibiting a paradoxical inhibitory effect on breathing at high concentrations. Severe respiratory depression as a result of CO2 rebreathing during sleep has been implicated as a possible trigger factor in sudden infant death syndrome (SIDS). OBJECTIVE To investigate the ventilatory and heart rate (HR) responses to inhaled CO2 in infan...
متن کاملVentilatory drive and ventilatory response during rebreathing.
Maranetra, N. and Pain, M. C. F. (1974). Thorax, 29, 578-581. Ventilatory drive and ventilatory response during rebreathing. The increase in inspiratory airway pressure generated against a transiently occluded airway during rebreathing is proposed as a simple index of ventilatory drive (zlP/dPCO2). A study of this index in 12 normal subjects and 50 patients with chronic airways obstruction demo...
متن کاملSustained microgravity reduces the human ventilatory response to hypoxia but not to hypercapnia.
We measured the isocapnic hypoxic ventilatory response and the hypercapnic ventilatory response by using rebreathing techniques in five normal subjects (ages 37-47 yr) before, during, and after 16 days of exposure to microgravity (microG). Control measurements were performed with the subjects in the standing and supine postures. In both microG and in the supine position, the hypoxic ventilatory...
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ژورنال
عنوان ژورنال: The Journal of Physiology
سال: 2017
ISSN: 0022-3751
DOI: 10.1113/jp274596