Gas exchanges during exercise in normoxia and hyperoxia
| Autor: | J. Vincent, D. Zaoui, D. Maillard, H. Gautier |
|---|---|
| Rok vydání: | 1978 |
| Předmět: |
Pulmonary and Respiratory Medicine
Adult Male medicine.medical_specialty Physiology Physical Exertion chemistry.chemical_element Oxygen pCO2 Oxygen Consumption Internal medicine Respiration medicine Humans Acidosis Hyperoxia Acid-Base Equilibrium Oxygenation respiratory system Carbon Dioxide Increased blood lactate respiratory tract diseases chemistry Control of respiration Anesthesia Cardiology Lactates Female medicine.symptom circulatory and respiratory physiology |
| Zdroj: | Respiration physiology. 33(2) |
| ISSN: | 0034-5687 |
| Popis: | Exercises of constant workload (90 watt) have been carried out during normoxia or hyperoxia FIO2 = 0.45). It has been shown that, in spite of a significant dispersion in the values of O2 deficit and O2 debt calculated, these values are related to the increased blood lactate level which contributes to the marked acidosis observed in both conditions of oxygenation. Hyperoxia reduces lactate level as well as the O2 debt. In addition to the significant increase in arterial [H+] and PCO2, exercise provokes a slight decrease in PO2. It is suggested that the significant variations of these humoral factors might contribute to the control of ventilation during exercise in both conditions of oxygenation. |
| Databáze: | OpenAIRE |
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