Effectiveness of Self-posturotherapy on the Elimination of Residual Fragments After Treatment of Lower Calyx Urinary Stones by Extracorporeal Lithotripsy or Retrograde Flexible Ureteroscopy.

pré Inclusion Criteria:

• Patient having read and signed the consent form for participation in the study • Patient candidate for an intervention on a lower calyx stone <15mm by LEC or URSS

Patients meeting all of the following criteria may be definitively included in the study:

• Patient treated by LEC, or patient treated by URSS and for whom the presence of lower calyceal fragments has been observed by endoscopy
• Absence of JJ stent (patients for whom a JJ stent was implanted after URSS or before LEC may be included as soon as it is removed)

Exclusion criteria

• Patients presenting one of the following criteria will not be included in the study:

• Renal or ureteral malformation: ureteral stenosis, pyelo-ureteral junction syndrome, horseshoe kidney, para calyceal diverticulum, pelvic kidney.
• LEC session interrupted due to treatment intolerance
• Physical disability making posturotherapy impossible (particularly spinal, etc.), morbid obesity, major gastroesophageal reflux, heart or respiratory failure.
• Balance disorder which would not allow self-posturotherapy to be carried out alone.
• Patient under legal protection, under guardianship or under curatorship
• Posturotherapy carried out while wearing a JJ probe
• Posturotherapy carried out by a third party (physiotherapist or other)
• Pregnant or breastfeeding patient
• Patient not affiliated to the French social security system
• Impossibility of providing the subject with informed information and/or giving written informed consent: dementia, psychosis, disorders of consciousness, non-French speaking patient
• Treatment that may modify the clearance of fragments (beta blocker, diuretic, etc.)
• Patient included in another therapeutic study protocol