Post-hyperventilation apnoea in conscious humans.
نویسندگان
چکیده
منابع مشابه
Post-hyperventilation apnoea in patients with brain damage.
A study of 100 subjects has confirmed that brief voluntary hyperventilation commonly causes apnoea in patients with supramedullary lesions, but not in healthy people. Apnoea was related to drowsiness rather than to the extent of the lesion; it was unrelated to the measured reduction in end-tidal carbon dioxide tension.
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In humans, hyperthermia leads to activation of a set of thermoregulatory responses that includes cutaneous vasodilation and sweating. Hyperthermia also increases ventilation in humans, as is observed in panting dogs, but the physiological significance and characteristics of the hyperventilatory response in humans remain unclear. The relative contribution of respiratory heat loss to total heat l...
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We have studied, in six normal subjects, the effect of nitrous oxide sedation on the ventilatory pattern and oxygen saturation using pulse oximetry (Sp0J after hyperventilation to an endtidal carbon dioxide partial pressure (PE'COJ °f 3 kPa. This value of P?Co2 was shown to be less than the apnoeic threshold of all these subjects when their ventilation vs P f COi response curves were plotted. A...
متن کاملPlasma ionized magnesium during acute hyperventilation in humans.
1. Respiratory alkalosis accompanies the clinical syndrome of tetany, precipitates cardiac arrhythmias and predisposes to coronary vasoconstriction. Magnesium plays a critical role in the maintenance of membrane function, and magnesium depletion is often associated with cardiac arrhythmias or vasoconstriction. 2. As technology for detecting circulating ionized magnesium (the most interesting fo...
متن کاملProlonged post-hyperventilation apnea in two young adults with hyperventilation syndrome
BACKGROUND The prognosis of hyperventilation syndrome (HVS) is generally good. However, it is important to proceed with care when treating HVS because cases of death following hyperventilation have been reported. This paper was done to demonstrate the clinical risk of post-hyperventilation apnea (PHA) in patients with HVS. CASE PRESENTATION We treated two patients with HVS who suffered from P...
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ژورنال
عنوان ژورنال: The Journal of Physiology
سال: 1994
ISSN: 0022-3751
DOI: 10.1113/jphysiol.1994.sp020213