Laser Doppler flowmetry for measurement of laminar capillary blood flow in the horse

1998 ◽  
Author(s):  
Henry S. Adair III
Keyword(s):  
Blood Flow ◽  
Laser Doppler Flowmetry ◽  
Capillary Blood ◽  
Laser Doppler ◽  
Capillary Blood Flow ◽  
Doppler Flowmetry

Measurement of Muscle Surface Capillary Blood Flow by Laser Doppler Flowmetry

1992 ◽  
Vol 21 (6) ◽  
pp. 491-493 ◽  
Author(s):  
WENDY M. NORMAN ◽  
MICHAEL H. COURT ◽  
NICHOLAS H. DODMAN ◽  
FRANK S. PIPERS
Keyword(s):  
Blood Flow ◽  
Laser Doppler Flowmetry ◽  
Capillary Blood ◽  
Laser Doppler ◽  
Capillary Blood Flow ◽  
Doppler Flowmetry

scholarly journals Scanning Laser Doppler Flowmetry Shows Reduced Retinal Capillary Blood Flow in CADASIL

Stroke ◽  
2004 ◽  
Vol 35 (11) ◽  
pp. 2449-2452 ◽  
Author(s):  
Mika Harju ◽  
Susanna Tuominen ◽  
Paula Summanen ◽  
Matti Viitanen ◽  
Minna Pöyhönen ◽  
...  
Keyword(s):  
Blood Flow ◽  
Laser Doppler Flowmetry ◽  
Capillary Blood ◽  
Laser Doppler ◽  
Capillary Blood Flow ◽  
Scanning Laser ◽  
Doppler Flowmetry ◽  
Retinal Capillary ◽  
Scanning Laser Doppler Flowmetry

State of some indices of laser doppler flowmetry in norm and in gingivitis in children

1999 ◽  
Vol 80 (4) ◽  
pp. 287-290
Author(s):  
M. Z. Mirgazizov ◽  
N. K. Khamitova ◽  
E. V. Mamaeva
Keyword(s):  
Blood Flow ◽  
Early Diagnosis ◽  
Laser Doppler Flowmetry ◽  
Capillary Blood ◽  
Laser Doppler ◽  
Capillary Blood Flow ◽  
Doppler Flowmetry ◽  
Microcirculatory Disorders

Capillary blood flow of paradont tissue in norm and in children sufferred from chronic generalized gingivitis and paradontosis in slight form is studied. The method of estimating microcirculatory disorders in paradont tissue using laser doppler fluorometry is developed. The prospects of its wide use in stomatology for early diagnosis of disorders of paradont capillary net-work are stressed.

The impact of hypercapnia on retinal capillary blood flow assessed by scanning laser Doppler flowmetry

2005 ◽  
Vol 69 (3) ◽  
pp. 149-155 ◽  
Author(s):  
Subha T. Venkataraman ◽  
Chris Hudson ◽  
Joseph A. Fisher ◽  
John G. Flanagan
Keyword(s):  
Blood Flow ◽  
Laser Doppler Flowmetry ◽  
Capillary Blood ◽  
Laser Doppler ◽  
Capillary Blood Flow ◽  
Scanning Laser ◽  
Doppler Flowmetry ◽  
Retinal Capillary ◽  
Scanning Laser Doppler Flowmetry ◽  
The Impact

scholarly journals Microcirculation disorders in patients with severe COVID-19 and development of bacterial sepsis

2022 ◽  
Vol 20 (4) ◽  
pp. 52-61
Author(s):  
E. E. Ladozhskaya-Gapeenko ◽  
K. N. Khrapov ◽  
N. N. Petrishchev ◽  
Yu. S. Polushin ◽  
I. V. Shlyk
Keyword(s):  
Blood Flow ◽  
Bacterial Infection ◽  
Laser Doppler Flowmetry ◽  
Average Rate ◽  
Capillary Blood ◽  
Laser Doppler ◽  
Capillary Blood Flow ◽  
Bacterial Sepsis ◽  
Doppler Flowmetry ◽  
Secondary Bacterial Infection

It is believed that microcirculation dysfunction in sepsis primarily caused by damage of the endothelium by infectious agents and pro-inflammatory cytokines. Mechanisms of impaired microcirculation in the severe course of COVID-19 and sepsis likely to be similar. However, there are few reports studied microcirculation disorders in patients with COVID-19, and their results are sometimes contradictory. Objective. To assess the microcirculation of patients with severe Covid-19 and the development of bacterial sepsis using nail bed microscopy and laser Doppler flowmetry. Materials and methods. 16 intensive care unit COVID-19 patients subsequently diagnosed with bacterial sepsis were examined. Patients underwent vital capillaroscopy and an occlusive test using laser Doppler flowmetry. The average rate of capillary blood flow, the size of the perivascular zone, the density of capillaries, the presence of intravascular aggregates, the increase in the amplitude of the maximum post-occlusive blood flow and the average value of postocclusive blood flow relative to the initial one were valuated. Additionally, the level of serum proadrenomedullin was evaluated. Studies were performed on the day of admission and in dynamics. Results. By the capillaroscopy analysis, microcirculation disorders were detected in the form of a decrease in the linear speed of capillary blood flow (<400 μm/s), an extention of the perivascular zone (>100 μm), the circulation of microaggregates; the absence of postocclusive hyperemia was determined by an occlusive test. Secondary bacterial infection led to an even greater aggravation of microcirculation disorders: an increase of the perivascular zone, the progression of intravascular aggregation resulting in microthrombosis with a decrease of the density of the capillary network (according to capillaroscopy), as well as a sharp decrease of amplitude maximal increment of blood flow of post-осclusive circulation at the time of an occlusive sample. We also revealed a trend of negative correlation between the level of serum proadrenomedullin and the maximum increase in blood flow during the occlusive test. Conclusion. The secondary bacterial infection in patients with COVID-19 leads to a significant aggravation of microcirculation disorders with the development of perfusion deficiency and interstitial edema. The increased plasma proadrenomedullin level supports the concept of the significant role of endothelial dysfunction in the pathogenesis of severe COVID-10 and bacterial sepsis.

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
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