scholarly journals ULTRASTRUCTURAL CHANGES IN THE WALL OF THE GREAT SAPHENOUS VEIN AT THE VARICOSE DISEASE OF VEINS OF LOWER LIMBS DEPENDING ON AGE AND ILLNESS DURATION

2018 ◽  
Vol 26 (2) ◽  
pp. 26-31
Author(s):  
I. A. Chekmareva ◽  
Kh. A. Abduvosidov ◽  
O. V. Paklina ◽  
E. A. Makeeva ◽  
L. L. Kolesnikov
Keyword(s):  
Endothelial Dysfunction ◽  
Young People ◽  
Connective Tissue ◽  
Saphenous Vein ◽  
Great Saphenous Vein ◽  
Lower Limbs ◽  
Ultrastructural Changes ◽  
Middle Aged ◽  
Aged People ◽  
Varicose Disease

The aim of the study was features of ultrastructural changes in cellular elements and connective tissue carcass of the great saphenous vein (GSV) at varicose disease in depending on the duration of the disease in persons of different ages. An examination by light microscopy of 133 fragments of BPV, excised during phlebectomy in 19 patients, and an electron microscopic examination of 532 preparations were performed. Depending on the age of the patients, four age groups was distinguished: 18-44 years old (young people); 45-59 years (middle-aged people); 60-74 years old (the elderly), 75-90 years old (persons of senile age). In the wall of the GSV of young people with a small duration of the disease, there were poorly expressed pathomorphological changes characterized by moderately expressed endothelial dysfunction and minor hypertrophy of smooth muscle cells (SMC) of the middle shell. In the group of middle-aged people, in addition to age-related changes in the structure of the wall of varicose dilated GSV, pathological changes are noted that are characteristic of the long course of the disease with the development of endothelial dysfunction. The phenotypic heterogeneity of the SMC in the middle shell intensifies, and the communication links between them is altered. Disorganization of connective tissue leads to a decrease in the strength of the connective tissue vein skeleton. Hypertrophy of SMC, as a universal compensatory-adaptive response of cells, develops in response to an increase in functional load with hemodynamic disturbances in the veins of the lower limbs and to compensate for the quantitative deficiency of SMC as a result of their death. In elderly and senile age the duration of varicose disease is more than 10 years, on average - up to 25-30 years. The number of destructively altered SMC is increasing, degenerative processes and sclerotic changes are progressing. The ultrastructural analysis of biopsies showed that at the initial stage of development of varicose disease in young people with a small duration of varicose disease, morphological changes in the structure of the GSV wall are poorly expressed. With the increase in the age of the patient and the duration of the disease, changes in GSV are progressed. Involute degenerative-dystrophic changes are most pronounced in patients over 60 years of age and are an aggravating factor during varicose transformation of the GSV wall. In elderly and senile age, the compensatory possibilities of the cells decrease, the sclerotic degenerative changes in the wall of the GSV are progressed.

Morphometric characteristics of competent proximal valves of the great saphenous vein and superficial femoral vein in vivo according to ultrasound angioscanning data

2019 ◽  
Vol 18 (3) ◽  
pp. 16-22
Author(s):  
E. K. Gavrilov ◽  
H. L. Bolotokov ◽  
E. A. Babinets
Keyword(s):  
Saphenous Vein ◽  
Great Saphenous Vein ◽  
Femoral Vein ◽  
Lower Boundary ◽  
Average Diameter ◽  
Lower Limbs ◽  
Functional Test ◽  
Natural Form ◽  
Superficial Femoral Vein ◽  
Venous Diameter

Introduction. It seems relevant to study the ultrasound anatomy and physiology of the proximal valve segments of the superficial femoral vein (SFV) and the great saphenous vein (GSV) to develop effective reconstructive surgical interventions on venous valves in chronic vein diseases.The aim of the survey was to study the ultrasound anatomy of the venous wall, the size and shape of the proximal SFV and GSV valves are normal at rest and during the functional test Valsalva.Material and methods. Proximal valve SFV studies were performed in 144 lower limbs in 115 people (mean age 51.1 ± 14.4 years, 60 women and 55 men), proximal GSV valves studies - in 82 lower limbs in 67 persons (average age 45, 1 ± 13.3 years, 33 women, 34 men). A longitudinal and transverse ultrasound scanning of the femoral vein bifurcation and safenofemoral junction areas were performed, the structures of the proximal SFV and GSV valves were visualized, the valve shape was measured and the diameter of the veins was measured at the level valves at the base of the valves (inlet diameter), at the point of maximum ectasia (diameter of ectasia), at the upper border of the valve (diameter of the outlet), as well as measuring the length of the valve a (length to ectasia, the total length of the valve). The degree of ectasia over the valve was judged by calculating the relative venous diameter change (RVDC).Results. the average diameter of the SFV at the level of the lower boundary of its first valve was 10.01 ± 1.44 mm. The average diameter of the SFV at the level of the maximum ectasia of its first valve was 13,1±2 mm. The average value of the index of RVDC for SFV was 31%±10,4%. An increase in the diameter of the vein in the zone of supravalvular ectasia up to 20% corresponded to the spindle-shaped valve, more than 20% - to the clavate form, which was noted in the majority of the examined. The change in the relative venous diameter of the SFV on the Valsalva test was 38,2%±12,4%. The average diameter of the GSV at the base of the first valves was 6,07±1,25 mm. The average diameter of the GSV at the level of the maximum ectasia of the osteal valve was 9,44±1,69 mm. The average RVDC for GSV was 58%±24%.Conclusion. the natural form of proximal SFV and GSV valves is clavate with presence of the significant supravalvular ectasia, which was noted in the majority of the subjects alone and in all during the performance of the Valsalva functional test.

scholarly journals The superficial venous pump

2018 ◽  
Vol 7 (2) ◽  
Author(s):  
Konstantin Mazayshvili
Keyword(s):  
Saphenous Vein ◽  
Great Saphenous Vein ◽  
Lower Limbs ◽  
Superficial Fascia ◽  
Step Cycle ◽  
Cross Sectional ◽  
Blood Flows ◽  
Active Function ◽  
Vein Segment ◽  
The Relationship

The present study has revealed the relationship between the cross sectional area of the great saphenous vein and the degree of tension in the superficial fascia of the thigh. We conducted an ultrasound examination with 27 patients (54 lower limbs) in both standing and walking positions. With an increase and decrease in the degree of tension of the superficial fascia, the blood is pushed to the sapheno-femoral junction. Nearly 200 mm3 of blood flows in, and is pushed out of, a 100-mm great saphenous vein segment in the thigh, towards the sapheno-femoral junction during a step cycle. As a result, the active function of the fascial compartment of the great saphenous vein has been found. We have called this mechanism the superficial venous pump.

Anatomical Patterns in Varicose Vein Disease: A Duplex Scanning Study

1995 ◽  
Vol 10 (3) ◽  
pp. 94-97 ◽  
Author(s):  
J. J. Guex ◽  
B. Hiltbrand ◽  
J. M. Bayon ◽  
F. Henri ◽  
F. A. Allaert ◽  
...  
Keyword(s):  
Saphenous Vein ◽  
Venous Insufficiency ◽  
Varicose Veins ◽  
Previous Treatment ◽  
Lower Limbs ◽  
Duplex Scanning ◽  
Consecutive Series ◽  
Yield Data ◽  
Varicose Disease ◽  
Vein Disease

Objectives: To determine symptomatology, clinical class, and topographic patterns of varicose veins in a consecutive series of patients with venous complaints. Methods: We performed clinical examination and duplex scanning of 498 lower limbs in 317 patients with obvious varicose veins for whom no previous treatment had been undertaken. Results: Classes of chronic venous insufficiency (CVI) in 498 legs: grade 0: 117 (23.5%); gr 1: 310 (62.2%); gr 2: 47 (9.4%); gr 3: 24 (4.8%). Duplex-detected venous reflux was found in the greater saphenous vein territory (junction or trunk or related perforator or main tributary) in 423 limbs (85.3%) the sapheno-femoral junction was incompetent in only 342 legs (68.7%). Reflux was found in the lesser saphenous vein territory in 100 limbs (20.1%) and in sapheno-popliteal junction in 92 (18.5%). Strictly non saphenous origin of varicosities was found in 31 limbs (6.2%). Deep venous incompetence was found in 48 legs (9.6%). Conclusions: These findings yield data on the distribution and occurence of lower limbs venous lesions in patients with varicose disease.

Graduated compression stockings effects on chronic venous disease signs and symptoms during pregnancy

2019 ◽  
Vol 35 (1) ◽  
pp. 46-55 ◽  
Author(s):  
Orlando Adas Saliba Júnior ◽  
Hamilton Almeida Rollo ◽  
Orlando Saliba ◽  
Marcone Lima Sobreira
Keyword(s):  
Pregnant Women ◽  
Saphenous Vein ◽  
Great Saphenous Vein ◽  
Varicose Veins ◽  
Intervention Group ◽  
Signs And Symptoms ◽  
Lower Limbs ◽  
Control Group ◽  
Venous Disease ◽  
Compression Stockings

Objectives To evaluate the effectiveness of compression stockings in controlling the varicose veins in pregnant women. Method A prospective controlled randomized clinical trial was performed, including 60 women: intervention group (n = 30), who used compression stockings, and control group (n = 30). Diameters of the great saphenous vein and small saphenous vein in the lower limbs of pregnant women in an orthostatic position were analyzed using Duplex-ultrasound. The symptomatology and CEAP were evaluated. Results Great saphenous vein diameters in the intervention group were 0.37 cm initial and 0.32 cm final (p < 0.0001) in the right leg and 0.28 cm and 0.38 cm (p < 0.0001) in the control group. CEAP classification presented worsening in the control group (p < 0.0001). The signs and symptoms in the control vs. intervention group: pain (86.67% vs. 23.33%; p < 0.0001), edema (70.00% vs. 33.33%; p = 0.0045), and leg heaviness (93.33% vs. 13.33%; p < 0.0001). Conclusions Compression stockings were effective in controlling the varicose veins related to pregnancy.

Compression stocking prevents increased venous retrograde flow time in the lower limbs of pregnant women

2020 ◽  
Vol 35 (10) ◽  
pp. 784-791
Author(s):  
Orlando Adas Saliba Junior ◽  
Hamilton Almeida Rollo ◽  
Orlando Saliba ◽  
Marcone Lima Sobreira
Keyword(s):  
Pregnant Women ◽  
Saphenous Vein ◽  
Great Saphenous Vein ◽  
Intervention Group ◽  
Lower Limbs ◽  
Control Group ◽  
Venous Reflux ◽  
Compression Stockings ◽  
Reflux Time ◽  
Significant Difference

Objectives To analyze the effect of graduated compression stockings on the venous reflux in the lower limbs of pregnant women. Method A controlled randomized clinical trial was performed with sixty women: intervention group (n = 30), who used compression stockings, and control group (n = 30). Using duplex-ultrasound, the reflux time and peak reflux velocity in the great saphenous vein and small saphenous vein were analyzed. Results Great saphenous vein reflux times in the intervention group were 0.13 s at the beginning (initial) and 0.04 s at the end of pregnancy (final) in the right leg and 0.02 s and 0.34 s (p < 0.0001) in the control group. No patient in the intervention group experienced pathological reflux at the end of the pregnancy. There was a significant difference in the reflux time measured from both the great saphenous vein and small saphenous vein and peak reflux velocity between the groups. Conclusion Compression stockings prevent increased venous reflux in lower limbs of pregnant women.

Association between Anatomical Variation of the Great Saphenous Vein and Venous Failure in Patients Undergoing Vascular Ultrasound of the Lower Limbs

2018 ◽  
Vol 31 (2) ◽  
Author(s):  
Ana Cristina Lopes Albricker ◽  
Ane Graziela Ferreira Andrade ◽  
Danila Simões Almeida ◽  
Gisely Simões Almeida ◽  
Jaider Matheus Monteiro de Andrade ◽  
...  
Keyword(s):  
Saphenous Vein ◽  
Great Saphenous Vein ◽  
Anatomical Variation ◽  
Lower Limbs ◽  
Vascular Ultrasound

scholarly journals An alternative method for smartphone input using AR markers

2014 ◽  
Vol 1 (3) ◽  
pp. 153-160 ◽  
Author(s):  
Yuna Kang ◽  
Soonhung Han
Keyword(s):  
Young People ◽  
Touch Screen ◽  
Middle Aged ◽  
Aged People ◽  
The Past ◽  
Touch Input ◽  
Mouse Cursor ◽  
Camera Image ◽  
Alternative Method ◽  
Drag And Drop

Abstract As smartphones came into wide use recently, it has become increasingly popular not only among young people, but among middle-aged people as well. Most smartphones adopt capacitive full touch screen, so touch commands are made by fingers unlike the PDAs in the past that use touch pens. In this case, a significant portion of the smartphone's screen is blocked by the finger so it is impossible to see the screens around the finger touching the screen; this causes difficulties in making precise inputs. To solve this problem, this research proposes a method of using simple AR markers to improve the interface of smartphones. A marker is placed in front of the smartphone camera. Then, the camera image of the marker is analyzed to determine the position of the marker as the position of the mouse cursor. This method can enable click, double-click, drag-and-drop used in PCs as well as touch, slide, long-touch-input in smartphones. Through this research, smartphone inputs can be made more precise and simple, and show the possibility of the application of a new concept of smartphone interface.

The End of History Illusion

Science ◽  
2013 ◽  
Vol 339 (6115) ◽  
pp. 96-98 ◽  
Author(s):  
Jordi Quoidbach ◽  
Daniel T. Gilbert ◽  
Timothy D. Wilson
Keyword(s):  
Young People ◽  
Older People ◽  
Middle Aged ◽  
End Of History ◽  
Aged People ◽  
The Past ◽  
Future People ◽  
The Future ◽  
The End Of History

We measured the personalities, values, and preferences of more than 19,000 people who ranged in age from 18 to 68 and asked them to report how much they had changed in the past decade and/or to predict how much they would change in the next decade. Young people, middle-aged people, and older people all believed they had changed a lot in the past but would change relatively little in the future. People, it seems, regard the present as a watershed moment at which they have finally become the person they will be for the rest of their lives. This “end of history illusion” had practical consequences, leading people to overpay for future opportunities to indulge their current preferences.

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