Purpose: To explore the mechanism and efficacy of the modified bladder neck intussusception in laparoscopic radical prostatectomy (LSRP) on postoperative early continence.
Methods: We prospectively collected clinical information of prostate cancer patients who underwent LSRP with modified bladder neck intussusception (n = 10) and non-intussusception (n = 10). At postoperative 1 month, the prostate-specific antigen (PSA), pad test, real-time magnetic resonance imaging (rt-MRI), and flow rate were performed. At postoperative 3 months, the PSA, pad test, international prostate symptom score (IPSS), overactive bladder symptom score (OABSS), incontinence questionnaire short form (ICI-Q-SF), and quality of life (Qol) were recorded.
Results: The intussusception and non-intussusception patients had similar baseline characteristics. At postoperative 3 months, intussusception patients had lower OABSS than non-intussusception patients (P = 0.038). The non-intussusception patients suffered from more severe incontinence (P = 0.026). The continence rate of intussusception patients was significantly higher (90% vs. 20%, P = 0.005). And intussusception patients had significantly lower Qol scores (P = 0.038). According to the morphologic analysis by rt-MRI, there were 7/10 non-intussusception patients and 2/10 intussusception patients having funnel-shaped bladder necks at Valsalva movement. The intussusception patients had larger angle between anterior and posterior wall at bladder neck (P = 0.029) and longer length of functional posterior urethra (P = 0.029). During micturition, the intussusception bladder neck was found to move less dynamically on X-axis and Y-axis, but the difference did not reach significance.
Conclusions: The modified technique of bladder neck intussusception in laparoscopic radical prostatectomy prolongs the length of functional posterior urethra and is effective to improve postoperative early continence.
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