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X-ray changes in the kidneys of children with orthostatic proteinuria
Insights
Orthostatic proteinuria (O.P.) in children is linked to increased kidney mobility (ptosis) and impaired urine flow. These findings suggest hemodynamic changes in kidney position may contribute to O.P. development.
Area of Science:
- Pediatric Nephrology
- Diagnostic Imaging
- Urology
Background:
- Orthostatic proteinuria (O.P.) is a condition affecting protein excretion.
- Kidney position and urine flow dynamics are crucial in renal function.
Purpose of the Study:
- To investigate the relationship between kidney mobility, urine outflow, and orthostatic proteinuria in children.
- To compare urographic findings in children with and without O.P. in different body positions.
Main Methods:
- Comparative analysis of excretory urography roentgenograms.
- Urography performed in both standing erect and lying down postures.
- Study included 38 children with O.P. and 31 controls.
Main Results:
- Children with O.P. exhibited significantly more frequent and pronounced kidney ptosis during orthostasis compared to controls.
- Disturbed urine outflow was observed in 36.8% of children with O.P., versus only 3.2% in the control group.
- Significant differences in kidney ptosis and urine outflow were noted between the O.P. and control groups.
Conclusions:
- Increased kidney mobility (ptosis) during orthostasis and disturbed urine outflow are associated with orthostatic proteinuria in children.
- Hemodynamic changes related to kidney ptosis may play a role in the pathogenesis of O.P.
- Excretory urography in different postures is a valuable tool for assessing these factors.
Abstract:
In 38 patients with orthostatic proteinuria (O.P.) and in 31 children of the control group (C) roentgenograms of excretory urography have been compared, made in the standing erect and in the lying down posture. In children with O.P. significantly more frequent and more expressive ptosis of the kidneys during orthostasis was found than in the controls. In children with O.P. disturbed urine outflow was found in 36.8%, while in children of the control group only in 3.2%. On the basis of the results obtained relations between haemodynamic changes in ptosis of the kidneys, disturbed urine outflow and the origin of O.P. are analysed.