Intracranial Pressure and Brain Monitoring XV by Beng-Ti Ang

Author:Beng-Ti Ang
Language: eng
Format: epub
Publisher: Springer International Publishing, Cham

A LAx was defined as the minute-by-minute ICP/MAP correlation coefficient over time intervals of 3, 5, 10, 20, 30, 60, and 120 min in duration. CPPopt calculation was based on LAx-CPP U-shaped plots for each defined LAx and for time windows of 1, 2, 4, 6, 8, 12, and 24 h. Every minute the resulting CPPopts were combined as a weighted average to produce continuous CPPopt recommendations (Fig. 1), following the DATACAR method [12].

Fig. 1Example of a combined cerebral perfusion pressure optimal autoregulatory capacity (CPPopt) derived from low-frequency autoregulation index (LAx) for several moving window sizes and several time scales (hours) of monitoring data. The better a u-curve fits the data (reflected in the line thickness), the more it contributes to the final combined CPPopt recommendation. Figure reproduced with permission from Journal of Neurosurgery (originally published in [12])

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