The study aims at understanding the effects of preoperative prostate morphology (especially, IPP – intravesical prostatic protrusion) on the continence after RARP (robot-assisted radical prostatectomy).

The researchers used retrospective analysis on subjects who took RARP from Oct 2010 to July 2014. They analyzed parameters like prostate-specific antigen, BMI, age, and pressure-flow and MRI findings. They used a multivariate logistic regression study to evaluate the factors and divided them into two based on the IPP length (group 1 – less than 5 mm and group 2 – greater or equal to 5 mm). They studied the IPPS (international prostate symptom score), quality of life, pad numbers, and overactive bladder symptoms.

Among 119 subjects, it was found that the nerve-sparing and IPP were the major factors to consider after the first month from RARP. After a year, nerve-sparing was a major factor to consider. Group 1 had a 38% continence rate, and Group 2 had 20.8% after the first month. After the third month, there was no significant difference. After RARP, the voiding symptom score and IPSS were similar after the first month.

IPP has a significant effect during the early stages after the surgery. However, in the later stages, IIP had no significant effect.