The value of radiological methods in diagnosis of dysmenorrhea of puberty

The scientific article "The Value of Radiological Methods in Diagnosis of Dysmenorrhea of Puberty" presents the results of studies using non-invasive diagnostic technologies: magnetic resonance imaging and three-dimensional ultrasonography with color Doppler blood flow imaging (CDI). The evaluation of the features of radiological indices in the patients with dysmenorrhea of functional and organic genesis of severe degree based on the study of the results of 3D ultrasound examination, MRI of small pelvic organs, as well as the state of uterine and endomyometrial blood flow to improve the algorithm of diagnostics has been carried out. A high percentage (51,11%) of the rate of detection of organic pathology in the patients with severe dysmenorrhea (anomalies of the uterus development in the form of bicornuate, saddle, septal, horned, leiomyoma of the uterus body, various forms of endometriosis, combination of leiomyoma and endometriosis of womb) has been stated. Revealed hemodynamic abnormality in the basins of the uterine arteries, the low degree of arterial vascularization of subendomyometrial layer and endometrium, high vascular resistance and rate reduction in blood flow were detected, which is more evident in the patients with functional dysmenorrhea. On the basis of comparative evaluation of informativeness of the research methods, expedience of their use has been substantiated

Blood flow peculiarities in vessels bifurcation

In this article we study the blood flow in models of branching blood vessels. Blood is a heterogeneous fluid and owing to the complex composition (erythrocytes, platelets, leukocytes, plasma) and the presence of special rheological properties (viscosity, pseudoplasticity, thixotropy), it can be attributed to non-Newtonian fluids. Red blood cells, called erythrocytes, responsible for transporting oxygen to tissues; white blood cells (platelets) for the regulation of the coagulation system activity. All blood components tend to deform and orientate in the stream and gather in clusters, which introduces significant changes in the behavior of blood flow. In the simplest terms, blood can be considered as a suspension of blood cells in physiological solution. The red cells are able to accumulate in the molecular chain and modify its configuration (shape and orientation in the flow). In our study, the blood flow simulation is implemented using rheological viscoelastic FENE-P model. It predicts the properties corresponding to real biological fluid such as the anomaly of viscosity, variable longitudinal viscosity and the finite time of relaxation of stresses. Governing parameters of the flows of such fluids is the Weissenberg number We, which characterizes the ratio of viscous to elastic properties, the Reynolds number Re describing the ratio of inertial to viscous properties, the ability of erythrocytes to change their orientation in the flow, the degree of disentanglement of the chains L2 and the coefficient of retardation characterizing the concentration of red blood cells. This article discusses the loss of symmetry of the fluid flow under given values of model parameters

The value of radiological methods in diagnosis of dysmenorrhea of puberty

The scientific article "The Value of Radiological Methods in Diagnosis of Dysmenorrhea of Puberty" presents the results of studies using non-invasive diagnostic technologies: magnetic resonance imaging and three-dimensional ultrasonography with color Doppler blood flow imaging (CDI). The evaluation of the features of radiological indices in the patients with dysmenorrhea of functional and organic genesis of severe degree based on the study of the results of 3D ultrasound examination, MRI of small pelvic organs, as well as the state of uterine and endomyometrial blood flow to improve the algorithm of diagnostics has been carried out. A high percentage (51,11%) of the rate of detection of organic pathology in the patients with severe dysmenorrhea (anomalies of the uterus development in the form of bicornuate, saddle, septal, horned, leiomyoma of the uterus body, various forms of endometriosis, combination of leiomyoma and endometriosis of womb) has been stated. Revealed hemodynamic abnormality in the basins of the uterine arteries, the low degree of arterial vascularization of subendomyometrial layer and endometrium, high vascular resistance and rate reduction in blood flow were detected, which is more evident in the patients with functional dysmenorrhea. On the basis of comparative evaluation of informativeness of the research methods, expedience of their use has been substantiated

The value of radiological methods in diagnosis of dysmenorrhea of puberty

The scientific article "The Value of Radiological Methods in Diagnosis of Dysmenorrhea of Puberty" presents the results of studies using non-invasive diagnostic technologies: magnetic resonance imaging and three-dimensional ultrasonography with color Doppler blood flow imaging (CDI). The evaluation of the features of radiological indices in the patients with dysmenorrhea of functional and organic genesis of severe degree based on the study of the results of 3D ultrasound examination, MRI of small pelvic organs, as well as the state of uterine and endomyometrial blood flow to improve the algorithm of diagnostics has been carried out. A high percentage (51,11%) of the rate of detection of organic pathology in the patients with severe dysmenorrhea (anomalies of the uterus development in the form of bicornuate, saddle, septal, horned, leiomyoma of the uterus body, various forms of endometriosis, combination of leiomyoma and endometriosis of womb) has been stated. Revealed hemodynamic abnormality in the basins of the uterine arteries, the low degree of arterial vascularization of subendomyometrial layer and endometrium, high vascular resistance and rate reduction in blood flow were detected, which is more evident in the patients with functional dysmenorrhea. On the basis of comparative evaluation of informativeness of the research methods, expedience of their use has been substantiated

The value of radiological methods in diagnosis of dysmenorrhea of puberty

The scientific article "The Value of Radiological Methods in Diagnosis of Dysmenorrhea of Puberty" presents the results of studies using non-invasive diagnostic technologies: magnetic resonance imaging and three-dimensional ultrasonography with color Doppler blood flow imaging (CDI). The evaluation of the features of radiological indices in the patients with dysmenorrhea of functional and organic genesis of severe degree based on the study of the results of 3D ultrasound examination, MRI of small pelvic organs, as well as the state of uterine and endomyometrial blood flow to improve the algorithm of diagnostics has been carried out. A high percentage (51,11%) of the rate of detection of organic pathology in the patients with severe dysmenorrhea (anomalies of the uterus development in the form of bicornuate, saddle, septal, horned, leiomyoma of the uterus body, various forms of endometriosis, combination of leiomyoma and endometriosis of womb) has been stated. Revealed hemodynamic abnormality in the basins of the uterine arteries, the low degree of arterial vascularization of subendomyometrial layer and endometrium, high vascular resistance and rate reduction in blood flow were detected, which is more evident in the patients with functional dysmenorrhea. On the basis of comparative evaluation of informativeness of the research methods, expedience of their use has been substantiated

Blood flow peculiarities in vessels bifurcation

In this article we study the blood flow in models of branching blood vessels. Blood is a heterogeneous fluid and owing to the complex composition (erythrocytes, platelets, leukocytes, plasma) and the presence of special rheological properties (viscosity, pseudoplasticity, thixotropy), it can be attributed to non-Newtonian fluids. Red blood cells, called erythrocytes, responsible for transporting oxygen to tissues; white blood cells (platelets) for the regulation of the coagulation system activity. All blood components tend to deform and orientate in the stream and gather in clusters, which introduces significant changes in the behavior of blood flow. In the simplest terms, blood can be considered as a suspension of blood cells in physiological solution. The red cells are able to accumulate in the molecular chain and modify its configuration (shape and orientation in the flow). In our study, the blood flow simulation is implemented using rheological viscoelastic FENE-P model. It predicts the properties corresponding to real biological fluid such as the anomaly of viscosity, variable longitudinal viscosity and the finite time of relaxation of stresses. Governing parameters of the flows of such fluids is the Weissenberg number We, which characterizes the ratio of viscous to elastic properties, the Reynolds number Re describing the ratio of inertial to viscous properties, the ability of erythrocytes to change their orientation in the flow, the degree of disentanglement of the chains L2 and the coefficient of retardation characterizing the concentration of red blood cells. This article discusses the loss of symmetry of the fluid flow under given values of model parameters

Blood flow peculiarities in vessels bifurcation

In this article we study the blood flow in models of branching blood vessels. Blood is a heterogeneous fluid and owing to the complex composition (erythrocytes, platelets, leukocytes, plasma) and the presence of special rheological properties (viscosity, pseudoplasticity, thixotropy), it can be attributed to non-Newtonian fluids. Red blood cells, called erythrocytes, responsible for transporting oxygen to tissues; white blood cells (platelets) for the regulation of the coagulation system activity. All blood components tend to deform and orientate in the stream and gather in clusters, which introduces significant changes in the behavior of blood flow. In the simplest terms, blood can be considered as a suspension of blood cells in physiological solution. The red cells are able to accumulate in the molecular chain and modify its configuration (shape and orientation in the flow). In our study, the blood flow simulation is implemented using rheological viscoelastic FENE-P model. It predicts the properties corresponding to real biological fluid such as the anomaly of viscosity, variable longitudinal viscosity and the finite time of relaxation of stresses. Governing parameters of the flows of such fluids is the Weissenberg number We, which characterizes the ratio of viscous to elastic properties, the Reynolds number Re describing the ratio of inertial to viscous properties, the ability of erythrocytes to change their orientation in the flow, the degree of disentanglement of the chains L2 and the coefficient of retardation characterizing the concentration of red blood cells. This article discusses the loss of symmetry of the fluid flow under given values of model parameters

Cutoff parameter and vortex core size in

There is some evidence that the electron-phonon mechanism is not strong enough to produce observed high critical temperatures in unconventional superconductors; this is the case in both the cuprates and Fe-based superconductors. The d-wave pairing in strongly correlated systems is consistent with the observation of nodal quasiparticles in the heavily hole doped superconductor KFe2As2 with Tc = 3 K and high-Tc cuprates. In this work the Eilenberger equations are solved for anisotropic dx2−y2-wave superconductors. The cutoff parameter ξh and vortex core size ξ2 (the distance from the vortex center to the radius where the current density reaches its maximum value) in the mixed state are investigated numerically. The cutoff parameter determines the field distribution in the generalized London equation obtained as a projection of the quasiclassical theory. It can be used for the fitting of the µSR and small-angle neutron scattering (SANS) experimental data. Field and temperature dependences of ξh/ξc2 in dx2−y2-wave superconductors are similar to those in s-wave superconductors: ξh/ξc2(B/Bc2)dependence has minimum at high temperatures and shows monotonously increasing behavior at low temperatures. Here, ξc2 is determined by the relation Bc2 =Φ0/2πξc22. The ξ2/ξc2(B/Bc2) dependence is monotonously decreasing function at intermediate and high temperatures

Cutoff parameter and vortex core size in d-wave superconductors

There is some evidence that the electron-phonon mechanism is not strong enough to produce observed high critical temperatures in unconventional superconductors; this is the case in both the cuprates and Fe-based superconductors. The d-wave pairing in strongly correlated systems is consistent with the observation of nodal quasiparticles in the heavily hole doped superconductor KFe2As2 with Tc = 3 K and high-Tc cuprates. In this work the Eilenberger equations are solved for anisotropic dx2−y2-wave superconductors. The cutoff parameter ξh and vortex core size ξ2 (the distance from the vortex center to the radius where the current density reaches its maximum value) in the mixed state are investigated numerically. The cutoff parameter determines the field distribution in the generalized London equation obtained as a projection of the quasiclassical theory. It can be used for the fitting of the µSR and small-angle neutron scattering (SANS) experimental data. Field and temperature dependences of ξh/ξc2 in dx2−y2-wave superconductors are similar to those in s-wave superconductors: ξh/ξc2(B/Bc2)dependence has minimum at high temperatures and shows monotonously increasing behavior at low temperatures. Here, ξc2 is determined by the relation Bc2 =Φ0/2πξc22. The ξ2/ξc2(B/Bc2) dependence is monotonously decreasing function at intermediate and high temperatures

Blood flow peculiarities in vessels bifurcation

In this article we study the blood flow in models of branching blood vessels. Blood is a heterogeneous fluid and owing to the complex composition (erythrocytes, platelets, leukocytes, plasma) and the presence of special rheological properties (viscosity, pseudoplasticity, thixotropy), it can be attributed to non-Newtonian fluids. Red blood cells, called erythrocytes, responsible for transporting oxygen to tissues; white blood cells (platelets) for the regulation of the coagulation system activity. All blood components tend to deform and orientate in the stream and gather in clusters, which introduces significant changes in the behavior of blood flow. In the simplest terms, blood can be considered as a suspension of blood cells in physiological solution. The red cells are able to accumulate in the molecular chain and modify its configuration (shape and orientation in the flow). In our study, the blood flow simulation is implemented using rheological viscoelastic FENE-P model. It predicts the properties corresponding to real biological fluid such as the anomaly of viscosity, variable longitudinal viscosity and the finite time of relaxation of stresses. Governing parameters of the flows of such fluids is the Weissenberg number We, which characterizes the ratio of viscous to elastic properties, the Reynolds number Re describing the ratio of inertial to viscous properties, the ability of erythrocytes to change their orientation in the flow, the degree of disentanglement of the chains L2 and the coefficient of retardation characterizing the concentration of red blood cells. This article discusses the loss of symmetry of the fluid flow under given values of model parameters