Measurement of blood flow to human nasal mucosa in normal and pathological conditions by the use of the 133Xe clearance technique

1984 ◽  
Vol 239 (3) ◽  
pp. 219-227 ◽  
Author(s):  
Cafer �zdetm ◽  
Meral T. Ercan
Keyword(s):  
Blood Flow ◽  
Nasal Mucosa ◽  
Human Nasal Mucosa ◽  
133Xe Clearance ◽  
Pathological Conditions ◽  
Clearance Technique

Sympathetic Neurogenic Control of Blood Flow in Human Nasal Mucosa

1986 ◽  
Vol 102 (5-6) ◽  
pp. 482-487 ◽  
Author(s):  
Peter Olsson ◽  
Mats Bende
Keyword(s):  
Blood Flow ◽  
Nasal Mucosa ◽  
Human Nasal Mucosa

Cerebral blood flow during static exercise in humans

1990 ◽  
Vol 68 (6) ◽  
pp. 2358-2361 ◽  
Author(s):  
H. B. Rogers ◽  
T. Schroeder ◽  
N. H. Secher ◽  
J. H. Mitchell
Keyword(s):  
Blood Flow ◽  
Cerebral Blood Flow ◽  
Venous Pressure ◽  
Voluntary Contraction ◽  
Knee Extensors ◽  
Flow Index ◽  
133Xe Clearance ◽  
Leg Exercise ◽  
Static Contractions ◽  
Clearance Technique

Cerebral blood flow (CBF) was determined in humans at rest and during four consecutive unilateral static contractions of the knee extensors. Each contraction was maintained for 3 min 15 s with the subjects in a semisupine position. The contractions corresponded to 8, 16, 24, and 32% of the maximal voluntary contraction (MVC) and utilized alternate legs. CBF (measured by the 133Xe clearance technique) was expressed by a noncompartmental flow index (ISI). Heart rate and mean arterial pressure increased from resting values of 73 (55-80) beats/min and 88 (74-104) mmHg to 106 (86-138) beats/min and 124 (102-146) mmHg, respectively (P less than 0.0005), during the contraction at 32% MVC. Arterial PCO2 and central venous pressure did not change. Corrected to the average resting PCO2, CBF during control was 55 (35-73) ml.100 g-1.min-1 and remained constant during contractions. Cerebral vascular resistance increased from 1.5 (1.0-2.2) to 2.4 (1.4-3.0) mmHg. 100 g.min.ml-1 (P less than 0.025) at 32% of MVC. There was no difference in CBF between the two hemispheres at rest or during exercise. In contrast to dynamic leg exercise, static leg exercise is not associated with an increase in global CBF when measured by the 133Xe clearance technique.

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