Study of the Relationship between the Structural Parameters of Magnetic Polypropylene-Knitted Fabric and Human Skin Microcirculation

In this paper, the effects of the structural parameters of magnetic-knitted fabric on human skin microcirculation (HSM) were studied in relation to magnetic polypropylene yarn, which was used as raw material. Three experimental factors were designed: the magnetic powder content of polypropylene, the feeding ratio of magnetic polypropylene (MP) and graphene viscous (GV), and stitch. Twelve pieces of seamless knitted fabric were prepared according to the comprehensive experimental design method. The BIV angiography was used to proceed with an HSM test of about 12 pieces of seamless knitted fabric. The results show the following: The magnetic powder content of polypropylene has the greatest influence on the blood flow promotion multiples of skin–blood microcirculation, followed by the feeding ratio of MP and GV, while stitch has the least influence. When the plating yarn feeding ratio was 100:0, the magnetic powder content of polypropylene was 50%, and the stitch was 1 + 1 false rib, meaning that the fabric could promote HSM more efficiently. This is compared against the common polypropylene knitted fabric, where the blood flow promotion multiples increased by 9.87%. The purpose of this study was to explore the structural parameters of magnetic polypropylene-knitted fabric that has a better effect on promoting HSM, and to provide a reference for the development of functional health-knitted fabrics.

Blood Vessel Density Measured Using Dynamic Optical Coherence Tomography is a Tool for Wound Healers

Dynamic optical coherence tomography (D-OCT) is a relatively new technique that may be used to study the substructures in the retina, in the skin and its microcirculation. Furthermore, D-OCT is a validated method of imaging blood flow in skin microcirculation. The skin around venous and mixed arterio-venous ulcers was imaged and found to have tortuous vessels assumed to be angiogenic sprouts, and classified as dots, blobs, coils, clumps, lines, and curves. When these images were analyzed and measurements of vessel density were made, it was observed that the prevalence of coils and clumps in wound borders was significantly greater compared with those at wound centers. This reinforced the belief of inward growth of vessels from wound edge toward wound center which, in turn, reposed confidence in following the wound edge to study healing. D-OCT imaging permits the structure and the function of the microcirculation to be imaged, and vessel density measured. This offers a new vista of skin microcirculation and using it, to better understand angiogenesis in chronic wounds.

Intermittent compression induces transitory hypoxic stimuli, upstream vasodilation and enhanced perfusion of skin capillaries, independent of age and diabetes

This study demonstrates that hand intermittent pneumatic compression evokes transitory hypoxic stimuli in distal finger skin microcirculation inducing vasodilation of arterial inflow vessels, enhanced perfusion, and maximum capillary recruitment in young and older subjects and older subjects with type 2 diabetes mellitus. Enhanced shear stress in the microcirculation did not appear to induce local skin vasodilation.

Reactivity of skin microcirculation as a biomarker of cardiovascular events. Pilot study

BACKGROUND: The role of microcirculatory disorders is progressively being accepted in the pathogenesis of cardiovascular diseases. OBJECTIVE: The purpose of current study is to assess whether we can consider skin microcirculation disorders as a biomarker of cardiovascular events. METHODS: Group 1 consisted of healthy volunteers (n = 31); group 2 (n = 42) consisted of patients with diseases that increase the risk of cardiovascular events; group 3 (n = 39) included patients with the history of cardiovascular events. Skin microcirculation measurement was performed using laser Doppler flowmetry during the heating test. RESULTS: LDF parameters reflecting the rapid response of microcirculation to heating (“Slope 120 s” and “Slope 180 s”) significantly differed in three groups (p < 0.05). A decrease in the “Slope 180 s” parameter less than 0.5 PU/s is associated with cardiovascular events (sensitivity 69.2%, specificity 66.7%; the area under the ROC curve, 0.667; 95% confidence interval [CI], 0.545–0.788, p = 0.01). Multivariable logistic regression analysis revealed that “Slope 180 s≤0.5 PU/s” was significantly related to cardiovascular events (adjusted odds ratio = 3.9, p = 0.019, CI 95% 1.2–12). CONCLUSIONS: Reduced reactivity of the skin microcirculation may be useful as a biomarker of severe damage to the cardiovascular system and is promising as a risk factor for cardiovascular events.

Knitting parameters effect of coffee carbon polyamide and graphene polyamide far-infrared knits on human skin microcirculation

In this paper, the effect of coffee carbon and graphene far-infrared polyamide knitted fabrics on blood perfusion were studied based on the test method of human skin microcirculation (HSM), starting from the plating yarn feeding ratio and stitch of seamless knitted fabrics. Set the face yarn feeding ratios of coffee carbon polyamide (CCP) and graphene polyamide (GP) as 100:0, 75:25, 50:50, and 25:75. The stitches were 1 + 3 rib, 1 + 1 false rib, and plain plating. Both the plating yarn feeding ratio and stitch were designed as two experimental factors. According to the comprehensive experimental design method, 12 seamless knitted fabrics were prepared. The HSM was tested by BVI Projection Vein Finder. According to the orthogonal analysis method: Factor A, the plating yarn feeding ratio has the greatest effect on HSM, the second was factor B. When the plating yarn feeding ratio was 75:25, the stitch was 1 + 3 rib, the fabric has an excellent promoting effect on HSM. The purpose of this study was to explore the process parameters of far-infrared seamless knitted fabrics that have a better promotion effect on HSM, to apply the process to develop functional health care clothing to meet people’s market needs.

MONITORING OF THE STATE OF THE SKIN BLOOD FLOW IN THE DYNAMICS OF EXPERIMENTAL BURN DISEASE DEVELOPMENT

The purpose of this study was to study the state of skin microcirculation in healthy and burned rats. It was found that thermal trauma has a negative impact on the microcirculation system, which is manifested in a decrease in the intensity of blood flow through small-diameter vessels