capsular flap pyeloplasty

cap·su·lar flap py·e·lo·plas·ty

a reconstructive procedure for correction of ureteropelvic obstruction, whereby a flap of renal capsule is swung down from the renal hilus to enlarge an obstructed intrarenal pelvis and upper ureter; used to correct situations involving loss of renal pelvic tissue that preclude the use of renal pelvis for the reconstruction.