Gradients of CO2 tension in the brain.

摘要: In cat experiments measurements were made of the CO2 tensions in arterial and cerebral venous blood, cisternal cerebrospinal fluid (CSF), on surface cortex. It was found that both CSF tension measured brain exceeded arithmetic mean by 0.5–1 mm Hg. This means cortical coincided with tissue tension, which can be calculated from diffusion equations, they distinctly different tension. The arterio-venous PCO2 difference to change linearly 12 4 Hg when increased 30 90 The very sensitive experimental conditions. Thus, it influenced craniotomy other procedures connected measurements, also sampling CSF. It is recommended are obtained direct CSF, or calculation tensions. latter case, a fairly exact value adding 1 blood Tissue for studies transients, conditions disturbed local circulation. If none these feasible, approximately as described text.