Measurement of Skeletal Muscle Blood Flow Using near Infra-Red Spectroscopy and Validation by Comparison with Laser Doppler Flowmetry

1994 ◽  
Vol 87 (s31) ◽  
pp. 26P-27P ◽  
Author(s):  
MS Thorniley ◽  
MS Irwin ◽  
CJ Green
Keyword(s):  
Skeletal Muscle ◽  
Blood Flow ◽  
Laser Doppler Flowmetry ◽  
Muscle Blood Flow ◽  
Laser Doppler ◽  
Doppler Flowmetry ◽  
Skeletal Muscle Blood Flow ◽  
Infra Red

Assessment of muscle blood flow by laser-Doppler flowmetry during hemorrhage in SHR

1990 ◽  
Vol 259 (3) ◽  
pp. H860-H865
Author(s):  
J. H. Lombard ◽  
R. J. Roman
Keyword(s):  
Skeletal Muscle ◽  
Blood Flow ◽  
Laser Doppler Flowmetry ◽  
Muscle Blood Flow ◽  
Control Period ◽  
Tissue Perfusion ◽  
Gracilis Muscle ◽  
Laser Doppler ◽  
Doppler Flowmetry ◽  
Skeletal Muscle Blood Flow

Skeletal muscle blood flow was assessed via laser-Doppler flowmetry (LDF) in the gracilis muscle of anesthetized 12- to 15-wk-old spontaneously hypertensive rats (SHR) and normotensive Wistar-Kyoto (WKY) control rats subjected to graded hemorrhage. Tissue perfusion was assessed at 20 specific sites in the muscle before and 20 min after each of five successive 1-ml withdrawals of blood. Mean LDF signals recorded from the gracilis muscle of SHR and WKY were similar during the prehemorrhage control period. After hemorrhage, mean arterial pressure and calculated vascular resistance of the gracilis muscle were higher in SHR than in WKY, and SHR exhibited a greater reduction of LDF signal in response to hemorrhage than WKY. Although SHR and WKY had a similar number of low flow sites (LDF signal less than 0.17 V) during the control period, successive blood volume withdrawals led to a significantly greater increase in the number of poorly perfused areas in the muscles of the hypertensive animals. The results of this study suggest that LDF is a useful tool to assess tissue perfusion during circulatory stress and that hemorrhage causes a greater decrease in skeletal muscle blood flow in SHR than in WKY. More severe reductions in tissue perfusion may contribute to the reduced ability of hypertensive animals to survive after hypotensive hemorrhage.

Cutaneous laser-Doppler flowmetry: influence of underlying muscle blood flow

1988 ◽  
Vol 65 (1) ◽  
pp. 478-481 ◽  
Author(s):  
J. L. Saumet ◽  
D. L. Kellogg ◽  
W. F. Taylor ◽  
J. M. Johnson
Keyword(s):  
Skeletal Muscle ◽  
Blood Flow ◽  
Laser Doppler Flowmetry ◽  
Muscle Blood Flow ◽  
Ventral Surface ◽  
Skin Surface ◽  
Laser Doppler ◽  
Doppler Flowmetry ◽  
Forearm Exercise ◽  
Opening And Closing

To find whether the measurement of skin blood flow (SkBF) by laser-Doppler flowmetry (LDF) is influenced by blood flow to underlying skeletal muscle, five subjects performed mild forearm exercise to induce a metabolic hyperemia in muscle in both forearms. This exercise consisted of alternative opening and closing of both hands at a frequency of approximately 1/s for a duration of 3 min. This exercise was performed twice by each subject. Forearm blood flow (FBF) by plethysmography increased from 2.64 +/- 0.49 (rest) to 31.11 +/- 9.95 ml.100 ml-1.min-1 (immediately after exercise) (P less than 0.001). No statistically significant postexercise increase was observed in LDF measured on the dorsal (110 +/- 21 to 105 +/- 21 mV) or ventral surface (266 +/- 113 to 246 +/- 77 mV) of the forearm. LDF measured from the chest also showed no significant change, indicating that the exercise was too mild to have reflex effects on SkBF. Moreover, the slope of the logarithmic linear regression and the half-time for recovery during the postexercise period for FBF were not reflected in LDF measurements from any of the three sites. We conclude that LDF measured from the skin surface is not influenced by blood flow to underlying skeletal muscle.

Post-ischemic microcirculatory blood flow in skeletal muscle evaluated by laser-Doppler flowmetry

1994 ◽  
Vol 1 (1) ◽  
pp. 21-24 ◽  
Author(s):  
U. Gustafsson ◽  
G.E. Nilsson ◽  
P. Thunberg ◽  
D.H. Lewis
Keyword(s):  
Skeletal Muscle ◽  
Blood Flow ◽  
Laser Doppler Flowmetry ◽  
Laser Doppler ◽  
Microcirculatory Blood Flow ◽  
Doppler Flowmetry

Peculiarities of microcirculation in periodont tissues in children of key age groups sufficient type 1 diabetes. Part II

2019 ◽  
Vol 24 (2) ◽  
pp. 108-119 ◽  
Author(s):  
B. N. Davydov ◽  
D. A. Domenyuk ◽  
S. V. Dmitrienko
Keyword(s):  
Diabetes Mellitus ◽  
Blood Flow ◽  
Type 1 Diabetes ◽  
Type 1 Diabetes Mellitus ◽  
Laser Doppler Flowmetry ◽  
Laser Doppler ◽  
Diabetic Microangiopathy ◽  
Healthy Children ◽  
Doppler Flowmetry

Relevance. Morpho-functional changes in peripheral circulation established in type 1 diabetes mellitus correlate with changes in central hemodynamics, allowing the use of microcirculation indicators as diagnostic and prognostic criteria for assessing the degree of functional vascular disorders. Identifcation of microcirculation features of the blood by the method of laser Doppler flowmetry in children with different experience of type 1 diabetes in key age categories.Materials and methods. The study included 67 children with type 1 diabetes mellitus aged 12-15 years with an experience of the disease from six months to ten years. The comparison group consisted of 38 healthy children. The state of the microvasculature was assessed by laser Doppler flowmetry using a laser analyzer for capillary blood flow LAKK-OP.Results. In children with an experience of type 1 diabetes of less than two years, microcirculation disorders in periodontal tissues correspond to the hyperemic form, accompanied by increased perfusion, a decrease in the amplitude of low-frequency oscillations, increased heart rate, high blood flling, and blood flow bypass. For children with an endocrinopathy experience of more than three years, microcirculation disorders correspond to a stagnant form, combined with a decrease in perfusion due to stagnation of blood in the venular link, endothelial domination with suppression of neurogenic and cardiac fluctuations, low efciency and redistribution of blood flow in favor of the nutritive link.Conclusions. With the increase in experience, the degree of compensation of type 1 diabetes, the progression of diabetic microangiopathy, it is advisable to designate two stages of development of microcirculatory disorders. Early – compensatory with active adaptation, including neurogenic and endothelial regulation mechanisms. Late – decompensation with passive adaptation, supporting the effectiveness of microcirculation due to myogenic control of regulation, shunting and increasing the rate of blood outflow.

scholarly journals P01.29. Pre-polarization conductance at Jing-Well acupoints on the hand is correlated with blood flow measured by laser doppler flowmetry

2012 ◽  
Vol 12 (S1) ◽  
Author(s):  
S Lin ◽  
G Orenstein ◽  
A Froloff ◽  
N Nguyen ◽  
D Unsworth ◽  
...  
Keyword(s):  
Blood Flow ◽  
Laser Doppler Flowmetry ◽  
Laser Doppler ◽  
Doppler Flowmetry

Choroidal and ciliary body blood flow analysis: Application of laser Doppler flowmetry in experimental animals

1991 ◽  
Vol 53 (2) ◽  
pp. 151-156 ◽  
Author(s):  
Tseggal Gherezghiher ◽  
Hirofumi Okubo ◽  
Michael C. Koss
Keyword(s):  
Blood Flow ◽  
Laser Doppler Flowmetry ◽  
Ciliary Body ◽  
Flow Analysis ◽  
Laser Doppler ◽  
Doppler Flowmetry ◽  
Experimental Animals ◽  
Analysis Application ◽  
Blood Flow Analysis
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