1. Biologically variable pulsation improves jugular venous oxygen saturation during rewarming 
W.Alan C Mutch, MD, R.Keith Warrian, MD, Gerald M Eschun, MD, Linda G Girling, BSc, Leonard Doiron, Mary S Cheang, Gerald R Lefevre, MD 
The Annals of Thoracic Surgery 
Volume 69, Issue 2, Pages (February 2000)
DOI: /S (99)

2. Fig 1
Internal jugular venous O2 saturation (SjvO2) percent versus time. Blood was sampled every 5 minutes from the end of hypothermic cardiopulmonary bypass (CPB) until rewarmed to baseline temperature then maintained at this temperature for 30 minutes. There are 8 experiments in each group. The thick dashed horizontal line shows where SjvO2 equals 50%. The mean area and cumulative mean area for SjvO2 less than 50% is markedly greater with conventional pulsatile (CP) bypass.
The Annals of Thoracic Surgery  , DOI: ( /S (99) )

3. Fig 2
The arterial-jugular venous O2 content difference for both groups (mean ± standard error of the mean). CaO2-CjvO2 was significantly greater with conventional pulsatile (CP) bypass (group × time interaction; p = ; ∗significant differences between groups at time period shown).
The Annals of Thoracic Surgery  , DOI: ( /S (99) )

4. Fig 3
Log-log plot of probability distribution versus systolic arterial pressure (SAP) variability used to program the computer-controlled biologically variable roller pump. A l/fd plot is obtained. (a = 2.41 ± 0.25). A similar plot for conventional pulsatile bypass (CP) is shown. (a = 1.98 ± 0.26). The probability of a given SAP variation is much greater with biologically variable pulsatile bypass (BVP).
The Annals of Thoracic Surgery  , DOI: ( /S (99) )

5. Fig 4
A model of how increased systolic arterial pressure (SAP) variation could influence collapse of vessels with tone.
The Annals of Thoracic Surgery  , DOI: ( /S (99) )