Key result
Mathematical model accurately predicts arterial container pulsation amplitude across variable intraluminal pressures.
Why the study?
The arterial segment of the cerebral circulation partially influences the intracranial pressure wave, but the fundamental mechanism of pressure pulse transmission is not fully understood.
Supports pulsation modeling research; leaves open clinical translation pending prospective validation.
Vasospasm of cerebral arteries narrows the amplitude of the intracranial pressure wave, indicating that the arterial segment of the cerebral circulation is partially responsible for its formation. We investigated the fundamental mechanism of pressure pulse transmission from an artery to the surrounding environment. A mathematical model was derived expressing the amplitude of container pulsation (delta Po) as a function of mean intraluminal pressure (MPi), mean container pressure (MPo) and arterial pulse amplitude (delta Pi): delta Po = (-2(MPi - MPo) + b) (MPo + 1) delta Pi. This mathematical model was experimentally validated using an in vivo system of a single artery sealed inside a fluid-filled elastic container.
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Klassen et al. (1991) studied Intracranial pressure wave dynamics. Mathematical model of pressure pulse transmission was evaluated on Amplitude of container pulsation (delta Po). A mathematical model expressing the amplitude of container pulsation as a function of mean intraluminal pressure, mean container pressure, and arterial pulse amplitude was experimentally validated.
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