Effects of Low-Intensity Shock Wave Therapy on Erectile Function and Penile Vascular Parameters in Men with Erectile...

This systematic review and meta-analysis of randomized controlled trials evaluated the effects of low-intensity shock wave therapy (LiSWT) on erectile function (EF) and penile vascular parameters in men with erectile dysfunction (ED), compared with controls receiving sham or no treatment.

A systematic search of Scopus, PubMed, and Cochrane databases identified studies assessing LiSWT in men with ED. Primary outcomes were changes in the International Index of Erectile Function (IIEF)-5 and the IIEF-EF domain scores. Secondary outcomes included erection hardness score (EHS), sexual encounter profile (SEP) diary Q2 and Q3, global assessment question (GAQ) scores, and penile Doppler ultrasound parameters-peak systolic velocity (PSV), end-diastolic velocity (EDV), and resistive index (RI). Changes from baseline to the end of follow-up were compared between LiSWT and control groups.

Of 527 retrieved articles, 12 met inclusion criteria. Pooled analysis demonstrated significantly greater improvements in the LiSWT group for IIEF-5 (standardized mean difference [SMD], 1.19; 95% confidence interval [CI], 0.47-1.91; p=0.001) and IIEF-EF (SMD, 1.24; 95% CI, 1.02-1.45; p<0.001) scores compared with controls. No significant differences were found for EHS (p=0.698), SEP-Q2 (p=0.934), SEP-Q3 (p=0.985), GAQ (p=0.993), and penile Doppler ultrasound parameters, including PSV (p=0.855), EDV (p=0.995), or RI (p=0.818).

LiSWT provides modest improvements in IIEF scores but fails to produce significant changes in other functional or vascular parameters. These findings suggest that while LiSWT may offer some benefit, the clinical relevance is limited for most patients. Current evidence does not support its routine inclusion in ED treatment algorithms. Future research should focus on identifying patient subgroups most likely to experience significant and sustained improvements from this therapy.