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[Upper urinary tract: physiology, pathophysiology of obstructions and function assessment]
L Le Normand1, J M Buzelin, O Bouchot
1Clinique urologique, CHRU, Hôtel-Dieu, place Alexis-Ricordeau, 44093 Nantes, France. llenormand@chu-nantes.fr
Annales D'Urologie
|April 16, 2005
Summary
The upper urinary tract actively transports urine via smooth muscle contractions, maintaining kidney health. Its autonomous function is crucial, though the nervous system can modulate it, impacting obstruction responses.
Area of Science:
- Urology
- Physiology
- Renal Medicine
Context:
- The upper urinary tract facilitates safe and comfortable urine transport from the renal papilla to the bladder.
- This function relies on the inherent contractile properties of smooth muscle within the tract.
- The tract's autonomy ensures function preservation, even post-renal transplantation, with modulation possible via the autonomous nervous system.
Purpose:
- To elucidate the physiological mechanisms of urine transport within the upper urinary tract.
- To explore the role of smooth muscle contractility and autonomic nervous system modulation in upper urinary tract function.
- To understand adaptive mechanisms in response to various types of upper urinary tract obstruction.
Summary:
- Urine transport is an active process dependent on upper urinary tract smooth muscle contractility.
- The tract's autonomy is vital for function, particularly after renal transplantation, with nervous system modulation playing a secondary role.
- Obstruction triggers distinct adaptive responses based on type (acute, chronic, congenital, acquired), influencing urine transport conditions.
Impact:
- Provides insights into normal and pathological urine transport dynamics.
- Highlights the importance of smooth muscle function and autonomic modulation in renal health.
- Informs diagnostic and therapeutic strategies for conditions like hydronephrosis, pain, and impaired renal function due to obstruction.