Dynamics of renal parenchymal thickness in hydronephrosis patients before and after surgery
Aim of study. To reveal changes in renal parenchymal thickness in hydronephrosis patients before and after surgery depending on the patient’s age. Materials and methods. Archived medical histories of 350 patients after surgery for congenital hydronephrosis within 1990-2020 were studied. The age of patients at the moment of surgery varied from one month to 18 years. The dynamics of change in the parenchymal layer thickness of the impaired kidney was evaluated based on ultrasound protocols of kidney scanning before and after the surgery. Results. The maximum decrease in renal parenchyma before surgery was noted in the group of patients aged 15-18 years: 46.00% and 59.68% on the poles and in the lower third, respectively. The minimum decrease was registered in patients aged 0-3 months: 24.43% on the poles and 49.06% in the middle third of the kidney. The best renal parenchyma restoration after surgery was registered in group 1: 94.04% on the poles and 87.74% in the middle third. Low percentages of parenchymal regeneration were observed in the 7th age group: 69.11% and 61.52%, respectively. The values of loss and restoration of parenchyma in each age group were statistically reliable at p≤0.001. Conclusion. Patients operated at the age before 3 months were observed to have the minimum decrease in the thickness of the renal parenchymal layer before surgery with maximum values associated with restoration of renal parenchyma after surgical correction. The probability of complete equivalence of parenchymal thickness of the operated kidney to the healthy one reliably declines with increasing age at the moment of operation.