Objective: To analyze the underlying lower urinary tract dysfunctions by video-urodynamic studies in men who have persistent storage symptoms after initial drug therapy for lower urinary tract symptoms (LUTS) suggestive of benign prostatic hyperplasia (BPH).
Methods: The medical records of 614 men ≥40 years of age with LUTS and an International Prostate Symptom Score of ≥8 were retrospectively analyzed. All patients had persistent storage symptoms after medical treatment for at least 6 months. A video-urodynamic study was done to investigate the underlying bladder or bladder outlet dysfunction. Predictors of bladder outlet obstruction (BOO) by baseline urine flow metrics and prostate parameters were investigated.
Results: The final results revealed bladder neck dysfunction (BND) in 137/614 (22.3%), benign prostatic obstruction (BPO) in 246/614 (40.1%), detrusor overactivity (DO) in 193/614 (31.4%), and DO with detrusor underactivity (DO+DU) in 38/614 (6.2%) patients. Among the patients, 221/281 (78.6%) with a total prostatic volume (TPV) ≥40 ml had BOO, including 43/281 (15.3%) with BND and 178/281 (63.3%) with BPO. If we combined TPV ≥40 ml and Qmax <12 ml/s as predictors of BOO, BOO was found in 176/215 (81.8%) patients including 34/215 (15.8%) with BND and 142/215 (66.0%) with BPO. BOO was also found in 48.8% of men with a TPV <40ml, and in 36.3% of men with TPV< 40 ml and Qmax ≥ 12 ml/s. In 102 men with TPV <40 ml and Qmax ≥12 ml/s, 64 (62.7%) had DO.
Conclusion: BOO, including BND and BPO, comprise 62.4% (383/614) of men with persistent storage symptoms after initial medical treatment for LUTS/BPH. In men who have persistent storage symptoms after medical treatment for LUTS/BPH, BOO should be carefully investigated and appropriate management being given to improve LUTS.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5819762 | PMC |
| http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0190704 | PLOS |
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