Effect of carbon dioxide on cerebral blood flow velocity in preterm infants during postnatal transition

2014 ◽  
Vol 103 (8) ◽  
pp. e334-e339 ◽  
Author(s):  
Shahab Noori ◽  
Michael Anderson ◽  
Sadaf Soleymani ◽  
Istvan Seri
Keyword(s):  
Carbon Dioxide ◽  
Blood Flow ◽  
Cerebral Blood Flow ◽  
Flow Velocity ◽  
Preterm Infants ◽  
Blood Flow Velocity ◽  
Cerebral Blood Flow Velocity

Influence of Sleep State and Respiratory Pattern on Cyclical Fluctuations of Cerebral Blood Flow Velocity in Healthy Preterm Infants

Neonatology ◽  
1996 ◽  
Vol 69 (6) ◽  
pp. 357-367 ◽  
Author(s):  
Virender K. Rehan ◽  
Carlos A. Fajardo ◽  
Zia Haider ◽  
Ruben E. Alvaro ◽  
Donald B. Gates ◽  
...  
Keyword(s):  
Blood Flow ◽  
Cerebral Blood Flow ◽  
Flow Velocity ◽  
Preterm Infants ◽  
Blood Flow Velocity ◽  
Cerebral Blood Flow Velocity ◽  
Respiratory Pattern ◽  
Sleep State ◽  
Cyclical Fluctuations

Cerebral Blood Flow Velocity Regulation in Preterm Infants

Neonatology ◽  
1991 ◽  
Vol 59 (6) ◽  
pp. 329-335 ◽  
Author(s):  
Margot van de Bor ◽  
Frans J. Walther
Keyword(s):  
Blood Flow ◽  
Cerebral Blood Flow ◽  
Flow Velocity ◽  
Preterm Infants ◽  
Blood Flow Velocity ◽  
Cerebral Blood Flow Velocity

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.

The influence of behavioural states on cerebral blood flow velocity patterns in stable preterm infants

1989 ◽  
Vol 20 (3-4) ◽  
pp. 229-246 ◽  
Author(s):  
Vincent Th. Ramaekers ◽  
Paul Casaer ◽  
Hans Daniels ◽  
Marleen Smet ◽  
Guy Marchal
Keyword(s):  
Blood Flow ◽  
Cerebral Blood Flow ◽  
Flow Velocity ◽  
Preterm Infants ◽  
Blood Flow Velocity ◽  
Cerebral Blood Flow Velocity
Sign in / Sign up

Export Citation Format

Share Document