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Impact of 10 Sessions of Whole Body Cryostimulation on Cutaneous Microcirculation Measured by Laser Doppler Flowmetry

100%

Renata S. , Tomasz D. , Andrzej K. , Sławomir T.

Journal of Human Kinetics

2011

tom 30

75-83

The aim of the present study was to evaluate the basic and evoked blood flow in the skin microcirculation of the hand, one day and ten days after a series of 10 whole body cryostimulation sessions, in healthy individuals.The study group included 32 volunteers - 16 women and 16 men. The volunteers underwent 10 sessions of cryotherapy in a cryogenic chamber. The variables were recorded before the series of 10 whole body cryostimulation sessions (first measurement), one day after the last session (second measurement) and ten days later (third measurement). Rest flow, post-occlusive hyperaemic reaction, reaction to temperature and arterio-venous reflex index were evaluated by laser Doppler flowmetry.The values recorded for rest flow, a post-occlusive hyperaemic reaction, a reaction to temperature and arterio - venous reflex index were significantly higher both in the second and third measurement compared to the initial one. Differences were recorded both in men and women. The values of frequency in the range of 0,01 Hz to 2 Hz (heart frequency dependent) were significantly lower after whole-body cryostimulation in both men and women. In the range of myogenic frequency significantly higher values were recorded in the second and third measurement compared to the first one.Recorded data suggest improved response of the cutaneous microcirculation to applied stimuli in both women and men. Positive effects of cryostimulation persist in the tested group for 10 consecutive days.

Segmentary strategy in modeling of cardiovascular system with blood supply to regional skin

72%

Li Z. , Jiang W. , Diao J. , Chen C. , Xu K. , Fan H. , Yan F.

Biocybernetics and Biomedical Engineering

2021

tom Vol. 41, no. 4

1505--1517

Objective: The focus of this study is to model the cardiovascular system (CS) involving regional skin blood flow (SBF) to gain new insights into the skin-CS relationship. Methods: A lumped parameter model with a series of electrical components was developed to model the CS involving SBF. Four parts were considered: the heart, arterial circulation, microcirculation (including the skin and other tissues), and the venous system. The model was validated based on previous publications. Additionally, the body surface was divided into seven blocks replaced by lumped resistances in this model, including the head, upper limbs and neck, chest and back, anterolateral abdomen, posterior abdomen, lower limbs, and buttocks. The SBF of each block was described using a weighted average method (relative ratio of cutaneous blood perfusion and regional body surface area) Results: Cardiodynamics characterized the properties of cardiac cycles, including isovolumic contraction, accelerated ejection, decelerated ejection, isovolumic diastole, and filling phases. Blood flow and pulse pressure in the arterial trunk declined and increased, respectively, from the aorta root to the distal portion, exhibiting normal cardiovascular properties. Accordingly, the blood pressure of the arterial branches attached to the arterial trunk also satisfied normal physiological characteristics; the blood flow of all the arterial branches exhibited good agreement with previous studies. Additionally, the modeled SBF of each region was consistent with the data from the weighted average method. Conclusion: This model effectively demonstrates the normal properties of the CS that involves regional SBF and may be promising in the prediction of the skin-CS relationship.

Neurogenic and myogenic resting skin blood flowmotion in subjects with masked hypertension

72%

Gryglewska B. , Necki M. , Cwynar M. , Baron T. , Grodzicki T.

Journal of Physiology and Pharmacology

2010

tom 61

nr 5