Figure 1
From: Multimodal monitoring intracranial pressure by invasive and noninvasive means

Waveform analysis of the Brain4care Monitor. (A): normal waveform (P1 > P2 and short TTP). (B): abnormal waveform (P2 > P1 and longer TTP). P2/P1 ratio: the ratio between the amplitudes of peaks P2 and P1; TTP: time to peak, defined as the time, from the start of the pulse, at which the ICP waveform reaches its highest peak. The shaded line represents the confidence interval of the 1-min monitoring.