Microcirculation in the upper trapezius muscle during sustained shoulder load in healthy women an endurance study using percutaneous laser-Doppler flowmetry and surface electromyography

This paper proposes the development of automatic sleep stage detection by using physiological signals. We aim to develop an application to assist drivers after drowsiness or fatigue detection by a commercial driver vigilance system. The proposed method used a low-cost surface electromyography (EMG) device for sleep stage detection. We investigate skeletal muscle location and EMG features from sleep stage 2 to provide an EMG-based nap monitoring system. The results showed that using only one channel of a bipolar EMG signal from an upper trapezius muscle with median power frequency can achieve 84% accuracy. We implement a MyoWare muscle sensor into the proposed nap monitoring device. The results showed that the proposed system is feasible for detecting sleep stages and waking up the napper. A combination of EMG and electroencephalogram (EEG) signals might be yield a high system performance for nap monitoring and alarm system. We will prototype a portable device to connect the application to a smartphone and test with a target group, such as truck drivers and physicians.

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Myofascial Treatment for Microcirculation in Patients with Postural Neck and Shoulder Pain

Diagnostics ◽

10.3390/diagnostics11122226 ◽

2021 ◽

Vol 11 (12) ◽

pp. 2226

Author(s):

Jian-Guo Bau ◽

Shyi-Kuen Wu ◽

Bo-Wen Huang ◽

Tony Tung-Liang Lin ◽

Shih-Chung Huang

Keyword(s):

Blood Flow ◽

Shoulder Pain ◽

Trapezius Muscle ◽

Neck Muscle ◽

Doppler Flowmetry ◽

Upper Trapezius ◽

Neck And Shoulder Pain ◽

Blood Flow Ratio ◽

Upper Trapezius Muscle ◽

Patient Groups

Vascular impairment is a crucial factor associated with chronic muscle pain, but relevant research from the microcirculatory aspect is lacking. Here, we investigated the differences in neck muscle microcirculation detected through laser-doppler flowmetry (LDF) and cervical biomechanics by a videofluoroscopic image in asymptomatic participants and patients with postural neck and shoulder pain. To understand the mechanism behind the effect of myofascial treatment, transverse friction massage (TFM) was applied and the immediate effects of muscular intervention on microcirculation were monitored. In total, 16 asymptomatic participants and 22 patients (mean age = 26.3 ± 2.4 and 25.4 ± 3.2 years, respectively) were recruited. Their neck muscle microcirculation and spinal image sequence were assessed. The differences in the baseline blood flow between the asymptomatic and patient groups were nonsignificant. However, the standard deviations in the measurements of the upper trapezius muscle in the patients were significantly larger (p < 0.05). Regarding the TFM-induced responses of skin microcirculation, the blood flow ratio was significantly higher in the patients than in the asymptomatic participants (p < 0.05). In conclusion, postintervention hyperemia determined through noninvasive LDF may be an indicator for the understanding of the mechanism underlying massage therapies and the design of interventions for postural pain.

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The response of skin perfusion and of rheological and immunological variables to intravenous prostanoid administration in Raynaud’s phenomenon secondary to collagenosis

VASA ◽

10.1024/0301-1526.34.4.243 ◽

2005 ◽

Vol 34 (4) ◽

pp. 243-249 ◽

Cited By ~ 2

Author(s):

Drinda ◽

Neumann ◽

Pöhlmann ◽

Vogelsang ◽

Stein ◽

...

Keyword(s):

Laser Doppler Flowmetry ◽

Raynaud’S Phenomenon ◽

Raynaud's Phenomenon ◽

Plasma Viscosity ◽

Laser Doppler ◽

Erythrocyte Aggregation ◽

Control Group ◽

Long Term Effects ◽

Doppler Flowmetry

Background: Prostanoids are used in the treatment of Raynaud’s phenomenon and acral perfusion disorders secondary to collagenosis. In subjective terms, intravenous administration of these agents produces success in more than 50% of patients. The therapeutic outcome of clinical administration of alprostadil or iloprost may vary from individual to individual. Patients and methods: The following variables were analysed in a cross-over study in 27 patients with collagenosis and Raynaud’s phenomenon: plasma viscosity and erythrocyte aggregation (rheological variables), partial pressure of oxygen and laser Doppler flowmetry in the finger region, and lymphocyte phenotyping and interleukin (IL) determinations (immunological variables). Results: Laser Doppler flowmetry revealed significant differences between patients with secondary Raynaud’s phenomenon and a control group of 25 healthy subjects. Laser Doppler readings did not change significantly as a result of the treatments. Therapy with iloprost produced a reduction in IL-1beta, L-selectin (CD 62 L) and IL-6. Conclusion: The change in immunological variables due to iloprost may explain the long-term effects of prostaglandins in the treatment of Raynaud’s phenomenon. From our results it is not possible to infer any preference for iloprost or alprostadil.

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Sternal blood flow during coronary artery bypass surgery – An experimental study using laser doppler flowmetry

The Thoracic and Cardiovascular Surgeon ◽

10.1055/s-2004-816606 ◽

2004 ◽

Vol 52 (S 1) ◽

Author(s):

M Dudda ◽

MK Fritz ◽

C Wingenfeld ◽

G Muhr ◽

AM Laczkovics

Keyword(s):

Experimental Study ◽

Blood Flow ◽

Coronary Artery ◽

Coronary Artery Bypass ◽

Laser Doppler Flowmetry ◽

Coronary Artery Bypass Surgery ◽

Bypass Surgery ◽

Artery Bypass ◽

Laser Doppler ◽

Doppler Flowmetry

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Laser Doppler Flowmetry as a Method for Evaluating the Microwave Radiation Effect on Cutaneous Microcirculation

Critical Reviews in Biomedical Engineering ◽

10.1615/critrevbiomedeng.v29.i3.160 ◽

2001 ◽

Vol 29 (3) ◽

pp. 549-556 ◽

Cited By ~ 5

Author(s):

N. K. Bystrova ◽

V. V. Sidorov ◽

S. G. Matrusov ◽

E. V. Sadyrina ◽

N. K. Chemeris

Keyword(s):

Microwave Radiation ◽

Laser Doppler Flowmetry ◽

Radiation Effect ◽

Laser Doppler ◽

Doppler Flowmetry ◽

Cutaneous Microcirculation

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Microcirculation disorders in patients with vibration disease and comorbidity

Russian Journal of Occupational Health and Industrial Ecology ◽

10.31089/1026-9428-2019-59-9-672-673 ◽

2020 ◽

pp. 672-672

Author(s):

A. N. Kuks ◽

N. V. Slivnitsyna

Keyword(s):

Type 2 Diabetes ◽

Laser Doppler Flowmetry ◽

Laser Doppler ◽

Combined Effects ◽

Doppler Flowmetry ◽

Vibration Disease ◽

History Of

The results of laser Doppler flowmetry in patients with vibration disease associated with the combined effects of local and general vibration with a history of type 2 diabetes are presented.

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

Periodontology ◽

10.33925/1683-3759-2019-24-2-108-119 ◽

2019 ◽

Vol 24 (2) ◽

pp. 108-119 ◽

Cited By ~ 2

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.

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