scholarly journals Bilateral regional extracranial blood flow regulation to hypoxia and unilateral duplex ultrasound measurement error

2021 ◽  
Author(s):  
Alexander T. Friend ◽  
Matthew. Rogan ◽  
Gabriella M. K. Rossetti ◽  
Justin S. Lawley ◽  
Paul G. Mullins ◽  
...  
Keyword(s):  
Blood Flow ◽  
Measurement Error ◽  
Duplex Ultrasound ◽  
Flow Regulation ◽  
Ultrasound Measurement ◽  
Blood Flow Regulation

Regional redistribution of blood flow in the external and internal carotid arteries during acute hypotension

2014 ◽  
Vol 306 (10) ◽  
pp. R747-R751 ◽  
Author(s):  
Shigehiko Ogoh ◽  
Romain Lericollais ◽  
Ai Hirasawa ◽  
Sadayoshi Sakai ◽  
Hervé Normand ◽  
...  
Keyword(s):  
Blood Flow ◽  
Carotid Artery ◽  
Internal Carotid ◽  
Duplex Ultrasound ◽  
Flow Regulation ◽  
External Carotid ◽  
Peripheral Vasculature ◽  
Abrupt Decrease ◽  
Blood Flow Regulation ◽  
Acute Hypotension

The present study examined to what extent an acute bout of hypotension influences blood flow in the external carotid artery (ECA) and the corresponding implications for blood flow regulation in the internal carotid artery (ICA). Nine healthy male participants were subjected to an abrupt decrease in arterial pressure via the thigh-cuff inflation-deflation technique. Duplex ultrasound was employed to measure beat-to-beat ECA and ICA blood flow. Compared with the baseline normotensive control, acute hypotension resulted in a heterogeneous blood flow response. ICA blood flow initially decreased following cuff release and then returned quickly to baseline levels. In contrast, the reduction in ECA blood flow persisted for 30 s following cuff release. Thus, the contribution of common carotid artery blood flow to the ECA circulation decreased during acute hypotension (−10 ± 4%, P < 0.001). This finding suggests that a preserved reduction in ECA blood flow, as well as dynamic cerebral autoregulation likely prevent a further decrease in intracranial blood flow during acute hypotension. The peripheral vasculature of the ECA may, thus, be considered an important vascular bed for intracranial cerebral blood flow regulation.

Relationship of cerebral blood flow regulation to acute mountain sickness.

1989 ◽  
Vol 8 (3) ◽  
pp. 143-148 ◽  
Author(s):  
S M Otis ◽  
M E Rossman ◽  
P A Schneider ◽  
M P Rush ◽  
E B Ringelstein
Keyword(s):  
Blood Flow ◽  
Cerebral Blood Flow ◽  
Acute Mountain Sickness ◽  
Flow Regulation ◽  
Blood Flow Regulation ◽  
Mountain Sickness ◽  
Relationship Of

scholarly journals Recovery of blood flow regulation in microvascular resistance networks during regeneration of mouse gluteus maximus muscle

2019 ◽  
Vol 597 (5) ◽  
pp. 1401-1417 ◽  
Author(s):  
Charmain A. Fernando ◽  
Aaron M. Pangan ◽  
DDW Cornelison ◽  
Steven S. Segal
Keyword(s):  
Blood Flow ◽  
Gluteus Maximus ◽  
Flow Regulation ◽  
Blood Flow Regulation ◽  
Gluteus Maximus Muscle ◽  
Microvascular Resistance

scholarly journals Peripheral blood flow regulation in response to sympathetic stimulation in individuals with down syndrome

2018 ◽  
Vol 24 (C) ◽  
pp. 16 ◽  
Author(s):  
Thessa I.M. Hilgenkamp ◽  
Sang Ouk Wee ◽  
Elizabeth C. Schroeder ◽  
Tracy Baynard ◽  
Bo Fernhall
Keyword(s):  
Blood Flow ◽  
Down Syndrome ◽  
Peripheral Blood ◽  
Flow Regulation ◽  
Peripheral Blood Flow ◽  
Sympathetic Stimulation ◽  
Blood Flow Regulation

scholarly journals A paradigm shift for local blood flow regulation

2014 ◽  
Vol 116 (6) ◽  
pp. 703-705 ◽  
Author(s):  
Aleksander S. Golub ◽  
Roland N. Pittman
Keyword(s):  
Blood Flow ◽  
Paradigm Shift ◽  
Flow Regulation ◽  
Local Blood Flow ◽  
Blood Flow Regulation

Cerebral vascular autoregulation of blood flow and tissue PO2 in diabetic rats

1985 ◽  
Vol 249 (3) ◽  
pp. H540-H546 ◽  
Author(s):  
M. J. Rubin ◽  
H. G. Bohlen
Keyword(s):  
Blood Flow ◽  
Flow Regulation ◽  
Diabetic Rats ◽  
Adult Rats ◽  
Wall Area ◽  
Normal Limits ◽  
Blood Flow Regulation ◽  
Severe Diabetes ◽  
Tissue Po2 ◽  
Vessel Wall Area

The effect of chronic, severe diabetes mellitus on the morphology, blood flow regulation, and tissue PO2 of the cerebral cortex was evaluated in adult rats. The arterioles of the diabetic animals were enlarged in terms of both lumen diameter and vessel wall area. Although resting blood flow in the diabetic rats was greater than in the normal rats, the autoregulation of cerebral blood flow was very good within an arterial pressure range of 40-150 mmHg, just as in normal rats. The resting tissue PO2 in diabetic rats was 14.9 +/- 0.5 (SEM) compared with 12.7 +/- 0.6 mmHg in normal animals and in both groups remained at or near the resting PO2 at arterial pressures from 40 to 150 mmHg. There was no apparent loss of arterioles on the cortex surface or change in length of individual arterioles in diabetic animals but there was a 20-30% decrease in the number of venules and no change in the length of individual venules. These data indicate that although the arteriolar morphology and number of venules change in the brain during diabetes, physiological function in terms of tissue PO2 and blood flow regulation is maintained within normal limits.

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