Post-renal obstruction causing AKI is suggested by hydronephrosis on imaging and is relieved by which intervention?

Post-renal obstruction causing AKI is suggested by hydronephrosis on imaging and is relieved by which intervention?

• A. Bladder catheterization
• B. Diuretic therapy
• C. Immunosuppression
• D. Dialysis

Answer: (A)

Relief of post-renal obstruction is accomplished by decompressing the urinary tract, which removes the back pressure that impairs kidney filtration. Hydronephrosis on imaging indicates urine is backing up due to obstruction, so the first step is to drain the bladder with a catheter. By lowering intravesical pressure and reducing the downstream resistance, urine can flow again toward the urethra, easing the stress on the kidneys and often improving urine output and kidney function quickly. If the obstruction is solely at or above the bladder outlet, catheter drainage can suffice; if the blockage is higher up (such as a ureteral obstruction), additional measures like ureteral stenting or nephrostomy may be required. Other options, like diuretic therapy, immunosuppression, or dialysis, do not address the underlying obstructive cause and therefore are not the appropriate first-line relief in this scenario.

Relief of post-renal obstruction is accomplished by decompressing the urinary tract, which removes the back pressure that impairs kidney filtration. Hydronephrosis on imaging indicates urine is backing up due to obstruction, so the first step is to drain the bladder with a catheter. By lowering intravesical pressure and reducing the downstream resistance, urine can flow again toward the urethra, easing the stress on the kidneys and often improving urine output and kidney function quickly. If the obstruction is solely at or above the bladder outlet, catheter drainage can suffice; if the blockage is higher up (such as a ureteral obstruction), additional measures like ureteral stenting or nephrostomy may be required. Other options, like diuretic therapy, immunosuppression, or dialysis, do not address the underlying obstructive cause and therefore are not the appropriate first-line relief in this scenario.