Effect of the pelvic floor relaxed voiding position on uroflowmetry in men with lower urinary tract symptoms due to benign prostatic hyperplasia

Abstract

© JOURNAL OF THE MEDICAL ASSOCIATION OF THAILAND| 2019. Objectives: To investigate the effect of pelvic floor relaxed voiding position on uroflowmetric variables in patients with lower urinary tract symptoms (LUTS) due to benign prostatic hyperplasia (BPH). Materials and Methods: Men with LUTS due to BPH were enrolled. The uroflowmetry (UFM) were performed with comfortably full bladder. Each patient performed two voids into uroflowmeter in both standing and pelvic floor relaxing position. The UFM parameters were compared between the two different voiding positions. Results: A total of 71 men with a median age of 69 (43, 85) years were evaluated. The median void volume for the standing and pelvic floor relaxing positions in the patient group were 277.5 (150.8, 744) and 291.2 (156.4, 866.2) ml, respectively with no statistically significant difference between groups. The median Qmax were significantly higher in pelvic floor relaxing position than standing position (Qmax: 16.4 (5.3, 45.9) versus 15 (6.1, 44.2) ml/sec, respectively; p-value = 0.041). The mean PVR were significantly higher in pelvic floor relaxing position than standing position (PVR: 63.56+72.28 versus 50.60+68.07 ml, respectively; p-value = 0.002). Conclusion: The UFM parameters seem to be affected by the voiding position in men with LUTS due to BPH. It can be assumed that some benign prostatic hyperplasia patients might have some components of pelvic floor muscle dysfunction. Therefore, pelvic floor relaxing voiding position may be applied in these patients. Furthermore, physician may advise patient with LUTS due to BPH practice pelvic floor relaxing exercise to improve the symptoms.