Urine composition in pigs is regulated in both the ureter and the bladder
| Autor: | L. K. Jakobsen, Lars Henning Olsen, Rikke Nørregaard, K-E Andersson |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
0301 basic medicine
medicine.medical_specialty Time Factors Physiology Urinary system Sus scrofa Urinary Bladder 030232 urology & nephrology Urology Urine urologic and male genital diseases Kidney Concentrating Ability 03 medical and health sciences chemistry.chemical_compound 0302 clinical medicine Ureter Chlorides medicine Animals Urea Urothelium Creatinine Chemistry Osmolar Concentration Sodium General Medicine Hydrogen-Ion Concentration 030104 developmental biology medicine.anatomical_structure Potassium Female Renal pelvis |
| Zdroj: | Jakobsen, L K, Andersson, K E, Norregaard, R & Olsen, L H 2019, ' Urine composition in pigs is regulated in both the ureter and the bladder ', Physiological Research, vol. 68, no. 5, pp. 785-792 . https://doi.org/10.33549/physiolres.934086 |
| DOI: | 10.33549/physiolres.934086 |
| Popis: | The former perception of the urothelium as an impermeable barrier has been revised during the last decade, as increasing evidence of changes in urine composition during its passage of the urinary tract has been presented. Since differences in urothelial permeability between upper and lower urinary tract have been found, our aim is to demonstrate whether changes in urine composition occur during passage through the ureter. We studied consecutive urine samples from both renal pelvises in six pigs and compared them to samples from the bladder and distal ureter. We further sampled urine during storage in the bladder at a fixed volume. All samples were analysed by measuring osmolality and pH, along with the concentration of the following parameters: Na+, K+, Cl-, creatinine, urea. Urine alkalinity increased significantly during passage of the ureter. Creatinine concentration, pH and K+ increased significantly during the passage from pelvis to the bladder. All other parameters increased non-significantly during the passage to the bladder. The increase in concentration was more pronounced at low concentrations in the pelvis. During storage in the bladder, there was a significant increase in urea concentration. Changes in the composition of urine occur during its passage from the renal pelvis to the bladder and during storage in the bladder. Despite the brief transit time, significant changes in alkalinity were found already during passage through the ureter. |
| Databáze: | OpenAIRE |
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