[Optimal pulmonary ventilation determined by the relation between end-tidal CO2 and arterial blood pressure in artificially respirated cat].
End-tidal CO2 (ET-CO2) provides a continuous and sensitive monitoring of proper pulmonary ventilation in artificially ventilated animals during single unit recordings of the central nervous system. To determine a reliable standard of ET-CO2 in anesthetized and paralyzed animal, the relationship between ET-CO2 and arterial blood pressure (ABP) was observed in cat under different ventilation level. The results showed that ABP changed tremendously with variation in ventilation, but remained constant at a normal level as long as ET-CO2 was maintained within the range between 4.0-5.0%, i.e. optimally at 4.5 +/- 0.5%.
Li
C Y
CY
Shanghai Institute of Physiology, Chinese Academy of Sciences.
D000818:Animals; D001794:Blood Pressure / Q000502:physiology*; D002245:Carbon Dioxide / Q000032:analysis*; D002415:Cats; D011659:Pulmonary Gas Exchange; D012121:Respiration, Artificial; D012129:Respiratory Function Tests; D013990:Tidal Volume
D002245:Carbon Dioxide