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2-Stage of decompensation

2-Stage of decompensation. progressive urethral obstruction &presence of infection decompensation of the detrussor may occur result in high residual urine may reach up to 500 ml or more. Pathogenesis &Pathology:. Upper tract: 1- Ureter:

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2-Stage of decompensation

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  1. 2-Stage of decompensation progressive urethral obstruction &presence of infection decompensation of the detrussor may occur result in high residual urine may reach up to 500 ml or more.

  2. Pathogenesis &Pathology: • Upper tract: 1-Ureter: -In early stage the intravesical pressure is not transmitted into the ureters because of the competence of the ureterotrigonal unit. -Later hypertrophy of trigone. -Vesicoureteral reflux. -Intravesical pressure transmitted to urete and pelvis. -Thickening and tourtiousity of the ureter.

  3. 2-The kidney: -The pressure in the renal pelvis is zero. -Increase pressure due to obstruction or reflux lead to hydronephrosis> Stage of compensation: Stage of decompensation:

  4. Effect of hydronephrosis on the kidney: 1-The early changes: The end of the normal calyx is concave with increase pressure it becomes convex(clubbed). Changes in the parenchyma are due to: a-Compression atrophy. b-Ischemic atrophy mainly manifested in arcuate vessels that run at the base of the pyramid.

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