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Nitrous Oxide Method of Measuring Cerebral Blood Flow During Hypothermic Cardiopulmonary Bypass  Ian MacVeigh, David J Cook, Thomas A Orszulak, Richard.

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Presentation on theme: "Nitrous Oxide Method of Measuring Cerebral Blood Flow During Hypothermic Cardiopulmonary Bypass  Ian MacVeigh, David J Cook, Thomas A Orszulak, Richard."— Presentation transcript:

1 Nitrous Oxide Method of Measuring Cerebral Blood Flow During Hypothermic Cardiopulmonary Bypass 
Ian MacVeigh, David J Cook, Thomas A Orszulak, Richard C Daly, Dorothy E Munnikhuysen  The Annals of Thoracic Surgery  Volume 63, Issue 3, Pages (March 1997) DOI: /S (96) Copyright © 1997 The Society of Thoracic Surgeons Terms and Conditions

2 Fig. 1 Mean cerebral blood flow (CBF) (mL · 100 g−1 · min−1) (± standard deviation) during the prebypass period and at three cardiopulmonary bypass (CPB) temperatures in the absence of hemodilution; cardiopulmonary bypass period I (37.8°C), period II (32.5°C), and period III (27.5°C). (∗p < 0.05 versus cardiopulmonary bypass period I by repeated measures analysis of variance followed by Bonferroni correction. There were no between-group differences during any cardiopulmonary bypass period by Mann-Whitney rank sum test.) (ks = Kety-Schmidt; sso = sagittal sinus outflow.) The Annals of Thoracic Surgery  , DOI: ( /S (96) ) Copyright © 1997 The Society of Thoracic Surgeons Terms and Conditions

3 Fig. 2 Comparison of values for sagittal sinus outflow cerebral blood flow (CBF) (x axis) and nitrous oxide saturation CBF (y axis) in mL · 100 g−1 · min−1. The value of r is by Spearman rank order correlation for 21 paired values. The Annals of Thoracic Surgery  , DOI: ( /S (96) ) Copyright © 1997 The Society of Thoracic Surgeons Terms and Conditions

4 Fig. 3 Bland-Altman plot of cerebral blood flow (CBF) data. Mean CBF for the two techniques (horizontal axis) is plotted against difference (Diff) from the mean by the nitrous oxide washin technique. The mean bias (x axis, mL · 100 g−1 · min−1) is shown, as is the mean difference ± 2 standard deviations (SD). (ks = Kety-Schmidt; sso = sagittal sinus outflow.) The Annals of Thoracic Surgery  , DOI: ( /S (96) ) Copyright © 1997 The Society of Thoracic Surgeons Terms and Conditions

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