Maturation of Ventilatory Responses to Hypoxia, Hypercapnia, and Combined Hypoxia and Hypercapnia in Rats. † 1446
نویسندگان
چکیده
منابع مشابه
Ventilatory and metabolic responses to ambient hypoxia or hypercapnia in rats exposed to CO hypoxia.
We have investigated at ambient temperatures (Tam) of 25 and 5 degrees C the effects of ambient hypoxia (Hxam; fractional inspired O2 = 0.14) and hypercapnia (fractional inspired CO2 = 0.04) on ventilation (V), O2 uptake (VO2), and colonic temperature (Tc) in 12 conscious rats before and after carotid body denervation (CBD). The rats were concomitantly exposed to CO hypoxia (HxCO; fractional in...
متن کاملFructose feeding and intermittent hypoxia affect ventilatory responsiveness to hypoxia and hypercapnia in rats.
We hypothesized that, in male rats, 10% fructose in drinking water would depress ventilatory responsiveness to acute hypoxia (10% O2 in N2) and hypercapnia (5% CO2 in O2) that would be depressed further by exposure to intermittent hypoxia. Minute ventilation (Ve) in air and in response to acute hypoxia and hypercapnia was evaluated in 10 rats before fructose feeding (FF), during 6 wk of FF, and...
متن کاملHypoxia and Hypercapnia
The renin response to hypoxia in late gestation fetal sheep has been well characterized. However, the renin response to asphyxia-the combination of hypoxia and hypercapnia-has not been extensively studied. The purpose of this study was to determine 1) the interaction of hypoxia and hypercapnia in the control of renin secretion in late gestation fetal sheep and 2) the role of peripheral arterial...
متن کاملHemodynamic and ventilatory response to different levels of hypoxia and hypercapnia in carotid body-denervated rats
OBJECTIVE Chemoreceptors play an important role in the autonomic modulation of circulatory and ventilatory responses to changes in arterial O(2) and/or CO(2). However, studies evaluating hemodynamic responses to hypoxia and hypercapnia in rats have shown inconsistent results. Our aim was to evaluate hemodynamic and respiratory responses to different levels of hypoxia and hypercapnia in consciou...
متن کاملVentilatory and heart rate responses to hypoxia and hypercapnia in patients with diabetes mellitus.
The ventilatory response to isocapnic progressive hypoxia and hyperoxic progressive hypercapnia in 24 diabetic patients were compared with those of sex and age matched normal control subjects. The heart rate response to hypoxia was also measured in both groups. In diabetic patients the ventilatory and heart rate responses to hypoxia were significantly lower than those in the control group (0.10...
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ژورنال
عنوان ژورنال: Pediatric Research
سال: 1997
ISSN: 0031-3998,1530-0447
DOI: 10.1203/00006450-199704001-01465