Figure 18: Pressure wave reflection in the arterial system
3.3 Display of Pulse Waveform and Rhythm strip
Figure 19: BP Result Screen, mean beat feature points
The following are the points of interest on the pulse waveform, as indicated in
Figure 19.
•
Start of the pulse, t
0
, p
0
•
Peak of the incident wave, t
1
, p
1
•
Trough between incident and reflected wave, t
2
, p
2
•
Peak of the reflected wave, t
3
, p
3
•
Trough of the dicrotic notch, t
4
, p
4
•
Peak following the dicrotic notch, t
5
, p
5
3.4 Central Blood Pressure
The BP+ uses a physics-based model of the subclavian to brachial artery branch
to calculate central blood pressure. This model has been validated against
Incident wave path
Reflected wave path
Effective reflection site
Forward-going waves
Backward-going wave
Upper-arm cuff
Page 22 of 31
BP+ User Manual (R7)
