scholarly journals Influence of operative treatment of variсocele on the development of arterial hypertension

2020 ◽  
Vol 9 (4) ◽  
pp. 25-30
Author(s):  
Valentin N. Krupin ◽  
Mihail N. Uezdnyj ◽  
Polina I. Petrova
Keyword(s):  
Blood Flow ◽  
Surgical Treatment ◽  
Arterial Hypertension ◽  
Spermatic Cord ◽  
Varicose Veins ◽  
Venous Hypertension ◽  
Compensatory Process ◽  
Flow Through ◽  
Renal Venous Hypertension ◽  
The Relationship

Purpose of the research. To assess the incidence of arterial hypertension in men with varicocele and to identify the relationship between increased blood pressure and surgical treatment of varicocele. Material and methods. A survey of 412 men receiving treatment for arterial hypertension, 482 men previously operated on for varicocele and 68 patients with varicocele who had no surgical treatment was conducted. Results. Varicose veins of the spermatic cord in patients with arterial hypertension were detected in 44.6% of cases, which exceeds the incidence of varicocele occurrence in men of a comparable age category by 1.52 times. Surgical treatment of the left spermatic cord varicocele is combined with the development of arterial hypertension in 51.2% of patients, which is three times higher than the incidence of hypertension in men who didnt undergo surgical treatment for varicocele and twice the frequency of hypertension in the general population of men of comparable age. The more frequent occurrence of renal arterial hypertension in patients who underwent surgical treatment for varicocele may indicate an adverse effect of occlusion of the internal spermatic vein on the state of renal venous hemodynamics. Conclusion. Varicocele should be considered as a compensatory process for renal venous hypertension due to obstruction of blood flow through the renal vein, and elimination of compensatory blood flow can lead to renal venous hypertension, hypoxia and the development of arterial hypertension.

scholarly journals Effect of inguinal hernia on the thickness and blood flow of spermatic cord in boys

2019 ◽  
Vol 2 (2) ◽  
pp. e000030
Author(s):  
Shoujiang Huang ◽  
Canping Li ◽  
Xiuzhen Yang ◽  
Jianfeng Liang ◽  
Dongpi Wang
Keyword(s):  
Blood Flow ◽  
Inguinal Hernia ◽  
Spermatic Cord ◽  
Peak Systolic Velocity ◽  
Control Group ◽  
Pampiniform Plexus ◽  
Significant Difference ◽  
Highly Correlated ◽  
And Control ◽  
The Relationship

ObjectiveTo evaluate the effect of inguinal hernia (IH) on the spermatic cord using spermatic cord ultrasonography (SCU).MethodsFrom January 2016 to January 2017, boys with IH who received SCU at the start of open herniorrhaphy (OH) were enrolled in this study. The age and weight at SCU, width of the spermatic cord (SC-W), peak systolic velocity (PSV) in the spermatic artery (SA-PSV) and velocity in the pampiniform plexus (PP-V), and the interval between the initial and the second OH in boys with metachronous inguinal hernia (MIH) were recorded, and the relationship among them was studied. Boys with unilateral IH comprised the IH group, and boys with MIH comprised the MIH group. Boys with polydactylism served as the control. One-way analysis of variance tested the differences among groups. Spearman’s r tested the relationship between SC-W in the MIH group and the interval.ResultsA total of 80 boys were enrolled in this study (IH group 29, MIH group 26, and control group 25). SA-PSV and PP-V in the hernia side were faster and slower than the control, respectively. There was no significant difference in PP-V and SA-PSV of the treated side in the MIH group and in the control group. After herniorrhaphy, SC-W was tapered down to normal size. SC-W, SA-PSV, and PP-V in the treated side were all highly correlated to the interval in a curvilinear manner.ConclusionPSV was positively correlated with SC-W in boys with IH, and PP-V was negatively correlated; herniorrhaphy could reverse the impairment.

scholarly journals Renal artery aneurysms

2021 ◽  
pp. 164-174
Author(s):  
A. E. Zotikov ◽  
Z. A. Adyrkhaev ◽  
A. M. Solovyova
Keyword(s):  
Blood Flow ◽  
Surgical Treatment ◽  
Arterial Hypertension ◽  
Renal Artery ◽  
Renal Blood Flow ◽  
Antihypertensive Drugs ◽  
Renal Parenchyma ◽  
Artery Dissection ◽  
Childbearing Age ◽  
Ehlers Danlos Syndrome

Renal artery aneurysms are a rare condition and are usually found when other abdominal organ diseases are being searched. Among the causes of renal artery aneurysms, atherosclerosis and fibromuscular dysplasia predominate. However, they can also be observed in congenital Ehlers-Danlos syndrome, neurofibromatosis, arteritis, and due to traumatic effects. Most patients have an asymptomatic course of the disease. Literature data suggest slow growth of aneurysms, and their progression is associated with arterial hypertension, absence of wall calcification and pregnancy in young women. The aim of surgical treatment is to prevent aneurysm rupture, eliminate the risk of renal parenchyma embolism and correct arterial hypertension. Most authors believe that surgical treatment is indicated for asymptomatic course of the disease when the aneurysm is over 20 mm in diameter, aneurysm growth is over 5 mm within a year, arterial hypertension resistant to drug therapy, renal artery dissection and aneurysm presence in women of childbearing age. There are a number of surgical and endovascular techniques to restore renal blood flow. Both open and endovascular interventions are used for renal artery trunk surgery. For aneurysms of the renal artery branches, aortorenal shunting by autovenous or internal iliac artery as well as extracorporeal surgeries are more often used. The use of endografts is most appropriate for localization of aneurysms in the renal artery trunk, while embolization with microspirals and glue is most effective for saccular aneurysms. The embolization technique can cause embolization of the renal parenchyma itself as a potential complication, which aggravates arterial hypertension. The authors present the literature and their own data on various techniques to restore the renal blood flow. Up to 80-90% of the operated kidneys can be saved in the long term. Reconstructive surgery reduces the level of arterial pressure and reduces the number of antihypertensive drugs used and the need for renal replacement therapy.

scholarly journals The Relationship Between Cerebral Blood Flow and the EEG in Normals

1980 ◽  
Vol 7 (3) ◽  
pp. 195-198 ◽  
Author(s):  
Devidas Menon ◽  
Zoltan Koles ◽  
Allen Dobbs
Keyword(s):  
Blood Flow ◽  
Low Frequency ◽  
Weight Percent ◽  
Initial Slope ◽  
Inhalation Technique ◽  
Frequency Components ◽  
Flow Through ◽  
Gamma Rhythms ◽  
The Subject ◽  
The Relationship

SUMMARY:Using the Xel33 inhalation technique, measurements of the blood flow to the left and right parietal and temporal regions of the cerebrum were obtained in 5 healthy individuals while simultaneously recording their EEGs. Up to 3 measurements were obtained from each of the subjects the first while they were mentally at rest and the others while they were engaged in prescribed forms of mental activity. Relationships between the measured blood flow through grey matter, initial slope index, relative grey weight, percent grey flow and power in the delta, delta-theta, alpha, beta and gamma rhythms of the EEG were examined. The results showed that for the subject group as a whole there was a strong correlation between the power present in the low frequency components of EEG and the grey flow and relative grey weight parameters of blood flow. On an individual basis, the observed relationships were highly variable particularly at high flow rates and at low relative grey weights, but became much more definitive at low flows and high weights. The results as they relate to previous work of this kind are discussed.

Relationship between structural and hemodynamic heterogeneity in microvascular networks

1996 ◽  
Vol 270 (2) ◽  
pp. H545-H553 ◽  
Author(s):  
A. R. Pries ◽  
T. W. Secomb ◽  
P. Gaehtgens
Keyword(s):  
Mathematical Model ◽  
Blood Flow ◽  
Topological Structure ◽  
Blood Rheology ◽  
Experimental Information ◽  
Microvascular Networks ◽  
Rat Mesentery ◽  
Hemodynamic Characteristics ◽  
Flow Through ◽  
The Relationship

The relationship between structural and hemodynamic heterogeneity of microvascular networks is examined by analyzing the effects of topological and geometric irregularities on network hemodynamics. Microscopic observations of a network in the rat mesentery provided data on length, diameter, and interconnection of all 913 segments. Two idealized network structures were derived from the observed network. In one, the topological structure was made symmetric; in another a further idealization was made by assigning equal lengths and diameters to all segments with topologically equivalent positions in the network. Blood flow through these three networks was simulated with a mathematical model based on experimental information on blood rheology. Overall network conductance and pressure distribution within the network were found to depend strongly on topological heterogeneity and less on geometric heterogeneity. In contrast, mean capillary hematocrit was sensitive to geometric heterogeneity but not to topological heterogeneity. Geometric and topological heterogeneity contributed equally to the dispersion of arteriovenous transit time. Hemodynamic characteristics of heterogeneous microvascular networks can only be adequately described if both topological and geometric variability in network structure are taken into account.

scholarly journals Features of structural and functional parameters of superficial veins of lower extremities in men with arterial hypertension

2019 ◽  
Vol 1 (16) ◽  
pp. 18-21
Author(s):  
T. F. Vagapov ◽  
V. M. Baev ◽  
L. N. Druzhina ◽  
C. V. Letyagina
Keyword(s):  
Blood Flow ◽  
Arterial Hypertension ◽  
Varicose Veins ◽  
Venous Blood ◽  
Lower Extremities ◽  
Chronic Venous Disease ◽  
Venous Disease ◽  
Venous Blood Flow ◽  
Cardiovascular Risks ◽  
Functional Parameters

The aim of the work was to assess the structural and functional parameters of the superficial veins of the lower extremities in men with arterial hypertension. A comparative analysis of the results of the angioscanning of the superficial veins of the lower extremities between 60 men with arterial hypertension and 27 men with normal blood pressure at the age of 30–50 years was performed. In hypertension, an increased rate of venous blood flow and signs of chronic vein diseases are recorded — an increased diameter and area of the lumen of the veins; abnormal venous reflux marked in 10 % of men; in 3 % — varicose veins and thrombotic masses, signs of postrombotic lesion of the superficial veins.Conclusion. For men with hypertension aged 30–50 years, there is an increased rate of venous blood flow and signs of chronic venous disease of the lower extremities: chronic venous insufficiency, varicose and postrombotic venous disease, which must be considered when stratifying cardiovascular risks and treating hypertension.

NUMERICAL SIMULATION OF TRANSIENT BLOOD FLOW THROUGH THE LEFT CORONARY ARTERY WITH VARYING DEGREES OF BIFURCATION ANGLES

2017 ◽  
Vol 17 (01) ◽  
pp. 1750005
Author(s):  
BO ZHANG ◽  
YILUN JIN ◽  
XIAORAN WANG ◽  
TAISHENG ZENG ◽  
LIANSHENG WANG
Keyword(s):  
Blood Flow ◽  
Coronary Artery ◽  
Left Coronary Artery ◽  
Vascular System ◽  
Abdominal Aortic ◽  
Analysis Technique ◽  
Common Technique ◽  
Computational Fluid Dynamics Cfd ◽  
Flow Through ◽  
The Relationship

Atherosclerosis is a cardiovascular condition that can occur in any part of the vascular system. Especially, it can exist in bifurcated arteries such as the left and right coronary arteries, abdominal aortic bifurcation or carotid artery bifurcation. In our study, we examine the left coronary artery as an exemplification using wall shear stress (WSS) and wall pressure gradient (WPG). Then, we attempt to find the relationship between bifurcated arterial geometry and hemodynamics. Computational fluid dynamics (CFD) is a common technique applied to characterize blood flow accurately and assist us to gain an insight of atherosclerosis. In this paper, we used CFD as the computational hemodynamics analysis technique to examine flow through the left coronary artery that has variable angular bifurcation. Our results demonstrated that the region of low WSS area and magnitudes of maximum WPG increases with the angles of bifurcation. Such hemodynamic condition resulting from the large bifurcation angles has an effect on atherogenesis and is worthy of investigation for better understanding of atherosclerosis.

scholarly journals Optimization of treatment and diagnosis tactics at varicoseveins of lower extremities in military personnelin Mongolia

2008 ◽  
Vol 7 (1) ◽  
pp. 107-110
Author(s):  
B. Tsedendoo
Keyword(s):  
Surgical Treatment ◽  
Military Personnel ◽  
Varicose Veins ◽  
Combined Treatment ◽  
Lower Extremities ◽  
Venous Hypertension ◽  
Clinical Forms ◽  
Venous Shunt ◽  
A Chain ◽  
Treatment And Diagnosis

In this study, we have examined 166 patients after surgical treatment as a part of combined treatment of varicose veins of lower extremities. Depending on the level of veno-venous shunt, the following clinical forms of varicosity were revealed: varicosity with predominance of high venovenous shunt, descending form with predominance of low veno-venous shunt, ascending form. Thus, chronic venous hypertension starts a chain of pathological reactions causing chronic changes in skin of lower extremities in Mongolian military personnel.

Relationship of blood flow to pressure in the intestinal vascular bed of the dog

1962 ◽  
Vol 202 (2) ◽  
pp. 253-256 ◽  
Author(s):  
E. Clinton Texter ◽  
Steven Merrill ◽  
Melvin Schwartz ◽  
Guido Van Derstappen ◽  
Francis J. Haddy
Keyword(s):  
Blood Flow ◽  
Superior Mesenteric Artery ◽  
Mesenteric Artery ◽  
Vascular Bed ◽  
Local Mechanism ◽  
Small Vein ◽  
Flow Through ◽  
Renal Vascular ◽  
Relationship Of ◽  
The Relationship

The relationship of pressure in the superior mesenteric artery, mesenteric small artery, mesenteric small vein, and portal vein to the rate of blood flow in the superior mesenteric artery was studied in eight dogs. Total bed resistance to blood flow decreased as a function of flow over the range 20–60 ml/min but increased as a function of flow over the range 90–270 ml/min. The onset and cessation of the resistance increase were associated with pressures in the superior mesenteric artery of 64 and 205 mm Hg, respectively. These resistance changes resulted mainly from change of resistance to flow through vessels less than 0.5 mm diameter. The findings suggest that the intestinal vascular bed, like the renal vascular bed, has a local mechanism which antagonizes changes of flow rate produced by variation of arterial pressure.

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