Abstract
The present study was aimed to investigate (1) whether urodynamic factors are responsible for kidney damage in patients with bladder outlet obstruction (BOO) and (2) whether transurethral prostate surgery for BOO can alleviate the damage to the kidneys. This prospective observational study involved men aged 50-80years. Prostate size and urodynamic test were performed during screening period. Laboratory tests to measure the glomerular filtration rate, the urinary protein to creatinine ratio and dipstick urinalysis were performed before and 6months after the transurethral prostate surgery. Sixty-seven patients completed the laboratory study among a hundred enrolled patients with urodynamically proven BOO. Among the urodynamic parameters, only low bladder compliance (lower than 60mL/cmH2O) was associated with clinically significant proteinuria (p < 0.001). Transurethral prostate surgery significantly improved proteinuria (p = 0.007), especially in patients with low bladder compliance (p = 0.004), and subsequently decreased the risk grade of CKD progression (p < 0.001). Low bladder compliance in patients with BOO may be a risk factor for kidney damage. Transurethral prostate surgery to relieve BOO could be a preventive method against CKD progression in patients with low bladder compliance.
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