. Author manuscript; available in PMC: 2012 Aug 1.

Published in final edited form as: Neurocrit Care. 2011 Aug;15(1):55–62. doi: 10.1007/s12028-010-9463-x

Table 1.

128 metrics derived from an ICP pulse-based on the landmarks of Fig. 1

28 Basic metrics extracted from individual landmarks or over all characteristics
dV1, dV2, dV3, dP1, dP2, dP3	Amplitude of landmark relative to the minimum point prior to initial rise
L_V1P1, L_V1P2, L_V1P3, L_V2P2, L_V3P3	Time delay among landmarks
Curv_v1, Curv_v2, Curv_v3, Curv_p1, Curv_p2, Curv_p3	Absolute curvature of each landmark
K1, K2, K3, RC1, RC2, RC3	K1, K2, K3 are slope of each rising edge and RC1, RC2, RC3 are time-constants of each descending edge
mICP, diasICP	Mean ICP and diastolic ICP
L_T	Time delay of V₁ to ECG QRS peak
mCurv	Mean absolute curvature of the pulse
WaveAmp	Maximum among dP1–dP3
100 extended metrics calculated as ratios among metrics within each group
dP_p1p2,…	Ratio among landmark amplitudes
L_V1P1/L_T,_…	Ratio among time delays
Curv_v1/Curv_v2,_…	Ratio among curvatures
K₁/RC_1,…	Ratio among slopes/RCs