Comparison of regional vasomotor responses to acetazolamide and CO2 in rabbit cerebrum and cerebellum, measured by a hydrogen clearance method

2004 ◽  
Vol 182 (3) ◽  
pp. 287-294 ◽  
Author(s):  
K. Csete ◽  
Z. Vezekenyi ◽  
T. Doczi ◽  
J. Gy. Papp ◽  
M. Bodosi ◽  
...  
Keyword(s):  
Vasomotor Responses ◽  
Hydrogen Clearance Method ◽  
Hydrogen Clearance

Measurement of local blood flow of the intestine by hydrogen clearance method; Experimental study

1979 ◽  
Vol 9 (1) ◽  
pp. 63-70 ◽  
Author(s):  
Yoshio Mishima ◽  
Hiroshi Shigematsu ◽  
Yoshiaki Horie ◽  
Masanori Satoh
Keyword(s):  
Experimental Study ◽  
Blood Flow ◽  
Local Blood Flow ◽  
Hydrogen Clearance Method ◽  
Hydrogen Clearance

scholarly journals Hydrogen Clearance Method for Determining Local Cerebral Blood Flow. I. Spatial Resolution

1986 ◽  
Vol 6 (4) ◽  
pp. 486-491 ◽  
Author(s):  
Rüdiger von Kummer ◽  
Sigrid Herold
Keyword(s):  
White Matter ◽  
Spatial Resolution ◽  
High Spatial Resolution ◽  
Local Cerebral Blood Flow ◽  
Hydrogen Clearance Method ◽  
Significant Difference ◽  
Cat Brain ◽  
The Mean ◽  
Burr Holes ◽  
Hydrogen Clearance

To define the effective spatial resolution of the hydrogen clearance method, serial local CBF (LCBF) measurements were performed at different distances from the cortico–white matter junction of the cat brain. Twenty-five platinum-wire microelectrodes with a sensitive surface of 0.07 mm2 were inserted into the cerebral cortex of three cats through burr holes in the skull and advanced toward the ear-to-ear level in 1- or 0.1-mm steps. Most electrodes passed from high-perfusion regions into low-perfusion areas, indicating that the cortico–white matter junction had been traversed. Whereas within the gray and white matter the LCBF values were fairly constant, a striking decrease of CBF was registered at the cortico–white matter junction. Here the mean LCBF from 12 electrodes showed significant differences in flow between two locations 1 mm apart. On two occasions, a significant difference in CBF was found for locations only 0.1 mm apart. Despite this high spatial resolution, monoexponential clearance curves were detected only in the vicinity of the cortico–white matter junction. It is therefore assumed that factors other than flow might influence H2 clearance.

scholarly journals REEVALUATION OF HYDROGEN CLEARANCE METHOD FOR THE LIVER BASED ON AN ANALYSIS OF A MATHEMATICAL MODEL

1983 ◽  
Vol 16 (9) ◽  
pp. 1731-1731
Author(s):  
Makoto UMEMORI ◽  
Koji SASAJIMA ◽  
Masahiko ONDA ◽  
Akiro SHIROTA
Keyword(s):  
Mathematical Model ◽  
Hydrogen Clearance Method ◽  
Hydrogen Clearance
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