The Effects of Arterial Carbon Dioxide Partial Pressure and Sevoflurane on Capillary Venous Cerebral Blood Flow and Oxygen Saturation During Craniotomy

2009 ◽  
Vol 109 (1) ◽  
pp. 199-204 ◽  
Author(s):  
Klaus Ulrich Klein ◽  
Martin Glaser ◽  
Robert Reisch ◽  
Achim Tresch ◽  
Christian Werner ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Blood Flow ◽  
Cerebral Blood Flow ◽  
Oxygen Saturation ◽  
Partial Pressure ◽  
Carbon Dioxide Partial Pressure ◽  
Arterial Carbon Dioxide

Effect of arterial carbon dioxide tension on cerebral blood flow during deep hypothermia

Cryobiology ◽  
1978 ◽  
Vol 15 (6) ◽  
pp. 715 ◽  
Author(s):  
Y. Kawashima ◽  
H. Yoshikawa ◽  
I. Kosugi ◽  
K. Okada ◽  
T. Kitagaki ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Blood Flow ◽  
Cerebral Blood Flow ◽  
Carbon Dioxide Tension ◽  
Deep Hypothermia ◽  
Arterial Carbon Dioxide Tension ◽  
Arterial Carbon Dioxide

Cerebral blood flow velocity underestimates cerebral blood flow during modest hypercapnia and hypocapnia

2014 ◽  
Vol 117 (10) ◽  
pp. 1090-1096 ◽  
Author(s):  
Nicole S. Coverdale ◽  
Joseph S. Gati ◽  
Oksana Opalevych ◽  
Amanda Perrotta ◽  
J. Kevin Shoemaker
Keyword(s):  
Carbon Dioxide ◽  
Blood Flow ◽  
Cerebral Blood Flow ◽  
Magnetic Resonance ◽  
Flow Velocity ◽  
Blood Flow Velocity ◽  
Cerebral Blood Flow Velocity ◽  
Intraclass Correlation ◽  
Magnetic Resonance Images ◽  
Carbon Dioxide Partial Pressure

To establish the accuracy of transcranial Doppler ultrasound (TCD) measures of middle cerebral artery (MCA) cerebral blood flow velocity (CBFV) as a surrogate of cerebral blood flow (CBF) during hypercapnia (HC) and hypocapnia (HO), we examined whether the cross-sectional area (CSA) of the MCA changed during HC or HO and whether TCD-based estimates of CBFV were equivalent to estimates from phase contrast (PC) magnetic resonance imaging. MCA CSA was measured from 3T magnetic resonance images during baseline, HO (hyperventilation at 30 breaths/min), and HC (6% carbon dioxide). PC and TCD measures of CBFV were measured during these protocols on separate days. CSA and TCD CBFV were used to calculate CBF. During HC, CSA increased from 5.6 ± 0.8 to 6.5 ± 1.0 mm2 ( P < 0.001, n = 13), while end-tidal carbon dioxide partial pressure (PetCO2) increased from 37 ± 3 to 46 ± 5 Torr ( P < 0.001). During HO, CSA decreased from 5.8 ± 0.9 to 5.3 ± 0.9 mm2 ( P < 0.001, n = 15), while PetCO2 decreased from 36 ± 4 to 23 ± 3 Torr ( P < 0.001). CBFVs during baseline, HO, and HC were compared between PC and TCD, and the intraclass correlation coefficient was 0.83 ( P < 0.001). The relative increase from baseline was 18 ± 8% greater ( P < 0.001) for CBF than TCD CBFV during HC, and the relative decrease of CBF during HO was 7 ± 4% greater than the change in TCD CBFV ( P < 0.001). These findings challenge the assumption that the CSA of the MCA does not change over modest changes in PetCO2.

Central venous-to-arterial carbon dioxide partial pressure difference in early resuscitation from septic shock

2014 ◽  
Vol 31 (7) ◽  
pp. 371-380 ◽  
Author(s):  
Jihad Mallat ◽  
Florent Pepy ◽  
Malcolm Lemyze ◽  
Gaëlle Gasan ◽  
Nicolas Vangrunderbeeck ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Septic Shock ◽  
Partial Pressure ◽  
Pressure Difference ◽  
Carbon Dioxide Partial Pressure ◽  
Central Venous ◽  
Arterial Carbon Dioxide
Sign in / Sign up

Export Citation Format

Share Document