Laterality and coherence analysis of Laser Doppler Flowmetry signals in bilateral Nèi guān (内关 PC 6): a potential non-invasive method to assess microdrculatory changes of people in different ages

2017 ◽  
Vol 27 (1) ◽  
pp. 47-52 ◽  
Author(s):  
Guang-jun WANG ◽  
Yu-ying TIAN ◽  
Shu-yong JIA ◽  
Ze WANG ◽  
Wei-bo ZHANG
1988 ◽  
Vol 74 (2) ◽  
pp. 119-121 ◽  
Author(s):  
C. Orlandi ◽  
C. J. Dunn ◽  
L. G. Cutshaw

1. A non-invasive method is described for the assessment of angiogenesis in chronic inflammation using laser-Doppler flowmetry. 2. Significant increases in capillary blood flow were seen on days 5 and 7 after induction of subcutaneous granulomatous lesions, as compared with control skin. 3. Changes in blood flow were accompanied by changes in pulsatile flow pattern and by an intense angiogenic response observed by light microscopy. 4. The potential application of laser-Doppler flowmetry to quantitative and qualitative studies of evolving angiogenesis in pathological responses is discussed.


2017 ◽  
Vol 20 (4) ◽  
pp. 279-285 ◽  
Author(s):  
Dmitry A. Kulikov ◽  
Alexey A. Glazkov ◽  
Yulia A. Kovaleva ◽  
Natalia V. Balashova ◽  
Alexander V. Kulikov

This review includes results of scientific and clinical use of laser Doppler flowmetry (LDF) in patients with diabetes mellitus. LDF is a non-invasive method for the quantitative evaluation of microcirculation, which can assess microcirculatory rhythms and conduct functional tests with various impacts, allowing the exploration of regulatory mechanisms of microcirculation. LDF reveals specific diabetes changes in the regulatory function of microcirculation. Microcirculation disturbances, which are traditionally associated with the pathogenesis of complications, also occur in patients with early disorders of carbohydrate metabolism and may precede the manifestation of diabetes. However, this method is still not applied in clinical practice. In this review, we analysed factors limiting the implementation of LDF in practical medicine and suggest ways to improve its clinical significance.


Author(s):  
Н.П. Теплюк ◽  
С.В. Лебедева

Цель работы - оценка изменений функционального состояния микроциркуляторного русла, изучение особенностей морфологических параметров кожи неинвазивными методами исследования при различных морфотипах старения. В исследовании приняли участие 55 человек 35-65 лет с инволюционными изменениями нижней трети лица. Выделены четыре морфотипа старения, в зависимости от которых пациенты были разделены на группы: 1-я - 19 пациенток с деформационным типом; 2-я - 17 пациенток с усталым; 3-я - 8 пациенток с мелкоморщинистым; 4-я - 11 пациенток со смешанным морфотипом. Для изучения состояния кожи использовали лазерную допплеровскую флоуметрию и УЗИ кожи (22 Mhz). Методом лазерной допплеровской флоуметрии выявлены достоверные изменения при сравнении показателей микроциркуляции и ультразвуковым методом исследования кожи - деформационного и мелкоморщинистого типов (p<0,05). У деформационного и смешанного типов наблюдали преимущественно атонический тип микроциркуляции (9,42±3,71 и 9,56±2,31 перф. ед. соответственно), а при мелкоморщинистом - спастический тип (7,86±1,6 перф. ед.), при усталом морфотипе показатель микроциркуляции был в пределах нормы (7,86±1,6 перф. ед.). Данные УЗИ кожи позволили выявить у пациенток с деформационным морфотипом старения наиболее высокие значения толщины эпидермиса (125,94±27,84 мкм), дермы (1 439±118,11 мкм), плотности дермы (12±2,59 у. е.) по сравнению с толщиной эпидермиса (85±22,01 мкм), толщиной дермы (1 130±68,55 мкм) и плотностью дермы (7,87±2,1 у. е.) при мелкоморщинистом морфотипе старения. The purpose of the work is to assess changes in the functional state of the microvasculature, study of the features of the morphological parameters of the skin by non-invasive research methods for various morphotypes of aging. The study involved 55 patients with involutional changes in the lower third of the face aged 35 to 65 years, included according with the inclusion and exclusion criteria. 4 morphotypes of aging were identified, depending on which patients were divided into corresponding groups: 1 - 19 patients with deformational type, 2 - 17 with tired type, 3 - 8 with fine wrinkled type, 4 - 11 with mixed morphotype of aging. To study the condition of the patients’ skin, laser Doppler flowmetry and ultrasound examination of the skin (22 Mhz) were used. The method of laser Doppler flowmetry revealed significant changes when comparing microcirculation indices and the ultrasound method for examining deformational and fine wrinkled type (p<0,05). In the deformational type and mixed type, a predominantly atonic type of microcirculation was observed (9,42±3,71 and 9,56±2,31 perf. u., respectively), and in fine wrinkled spastic type of microcirculation (7,86±1,6 perf. u.), in the oral morphotype the microcirculation index was within the normal range of 7,86±1,6 perf. u. The data of ultrasound examination of the skin made it possible to reveal in the deformational morphotype of aging high values of the thickness of the epidermis (125,94±27,84 μm), the dermis (1 439±118,11 μm) and the density of the dermis (12±2,59 a. u.) compared with the thickness of the epidermis 85±22,01 μm, the thickness of the dermis (1 130±68,55 μm) and the density of the dermis (7,87±2,1 c. u.) in the fine wrinkled morphotype of aging.


Biosensors ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 201
Author(s):  
Mou Saha ◽  
Viktor Dremin ◽  
Ilya Rafailov ◽  
Andrey Dunaev ◽  
Sergei Sokolovski ◽  
...  

Novel, non-invasive wearable laser Doppler flowmetry (LDF) devices measure real-time blood circulation of the left middle fingertip and the topside of the wrist of the left hand. The LDF signals are simultaneously recorded for fingertip and wrist. The amplitude of blood flow signals and wavelet analysis of the signal are used for the analysis of blood perfusion parameters. The aim of this pilot study is to validate the accuracy of blood circulation measurements recorded by one such non-invasive wearable LDF device for healthy young non-smokers and smokers. This study reveals a higher level of blood perfusion in the non-smoker group compared to the smoker group and vice-versa for the variation of pulse frequency. This result can be useful to assess the sensitivity of the wearable LDF sensor in determining the effect of nicotine for smokers as compared to non-smokers and also the blood microcirculation in smokers with different pathologies.


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