1980
DOI: 10.1016/0034-5687(80)90110-3
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The dynamic effect of PetCO2 on vertebral bloodflow in cats

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1982
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Cited by 10 publications
(6 citation statements)
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“…The resultant asymmetrical response of the blood flow velocity is attributed to the asymmetry of the wash in and out times of the CO 2 stimulus. This same effect was originally observed in anaesthetised cats [13]and later described by Poulin et al [14]for healthy volunteers.…”
Section: Discussionsupporting
confidence: 70%
“…The resultant asymmetrical response of the blood flow velocity is attributed to the asymmetry of the wash in and out times of the CO 2 stimulus. This same effect was originally observed in anaesthetised cats [13]and later described by Poulin et al [14]for healthy volunteers.…”
Section: Discussionsupporting
confidence: 70%
“…Our findings are consistent with those of Dahlgren, Ingvar & Siesjo (1981) and Kagstrom et al (1983) who also found a 3-fold increase of flow in various grey matter areas of the brain when Pa,co2 increased 35-40 torr. Vis & Folgering (1980) reported a 3-fold increase of vertebral flow when PET,C02 was increased 30 torr. Feustal et al (1984) found a smaller increase, 193-fold for an increase of Pa co2 of 12-6 torr, but this again may be low because barbiturate anaesthesia reduces the responsiveness of cerebral blood vessels to changes of CO2 (Edvinsson & McCulloch, 1981).…”
Section: Relation Between Phrenic Activity and Medullary Ecf [H+]mentioning
confidence: 97%
“…It can be seen that flow reaches a stable level by approximately a minute after the step change of PaXO2. The half-time of the change is approximately 13 s. A number of investigators have determined the response of cerebral blood flow to changes of Pa,co, in human beings, cats and dogs (Shapiro, Wasserman & Patterson, 1965Severinghaus & Lassen, 1967;Tuteur, Reveich, Goldberg, Cooper, West, McHenry & Cherniack, 1976;Vis & Folgering, 1980;Wilson, Trystman & Rapela, 1985). A problem with most of these studies is that the change of CO2 was made at the mouth during spontaneous breathing or during constant ventilation in paralysed animals.…”
Section: Relation Between Phrenic Activity and Medullary Ecf [H+]mentioning
confidence: 99%
“…Our study does not allow us to quantify how changes of these variables would affect the slope of the Pco2-pH relationship. However, we have calculated the effects of a 3-fold increase of medullary 187 F. L. ELDRIDGE, J. P. KILEY AND D. E. MILLHORN blood flow (Vis & Folgering, 1980;Feustel, Stafford, Allen & Severinghaus, 1981) and the associated Haldane and non-linearity factors. We find that the change of the arterial to tissue PCO, difference would be smaller than 2 torr.…”
Section: Respiratory Effects Of Medullar Y Ph Changesmentioning
confidence: 99%
“…PCO2, which will be higher than arterial but less than venous Pco, and which has been shown in the cortex to be slightly higher than the arithmetic mean of the two (Ponten & Siesjo, 1966). The tissue to arterial Pco, difference in the medulla has been reported to be about 3-5 torr in the normoxic, normocapnic cat (Stafford, Feustel & Severinghaus, 1983 (Vis & Folgering, 1980;Feustel, Stafford, Allen & Severinghaus, 1981) and the associated Haldane and non-linearity factors. We find that the change of the arterial to tissue PCO, difference would be smaller than 2 torr.…”
Section: Respiratory Effects Of Medullar Y Ph Changesmentioning
confidence: 99%