Summary
Urologist Dr. Kevin Chu discusses the evidence behind low-intensity shockwave therapy for erectile dysfunction with host Mark Goldberg. Dr. Chu explains the cavitation bubble mechanism by which acoustic waves create microtrauma in penile tissue, recruiting growth factors that promote neoangiogenesis and tissue regeneration. Unlike oral medications or injections that mask symptoms, shockwave therapy promises restorative effects. The conversation addresses realistic expectations, noting that randomized controlled trials show roughly 50% improvement rates in well-selected patients with mild to moderate vasculogenic ED. Dr. Chu emphasizes the importance of patient selection, noting that men who respond to PDE5 inhibitors like Cialis are the best candidates, while those with severe ED unresponsive to medication may not benefit. The current lack of standardized protocols across machines and treatment schedules remains the field's biggest challenge.
Key Points
- Shockwave creates cavitation bubbles in tissue that collapse and recruit growth factors for neoangiogenesis
- Unlike oral medications, ESWT offers restorative potential rather than symptom masking
- About 17-18 randomized controlled trials over the past decade show roughly 50% improvement in selected patients
- Best candidates have mild to moderate vasculogenic ED and still respond to PDE5 inhibitors
- Current data supports approximately six treatment sessions spread over three to six weeks
- Side effects are minimal, limited to occasional mild tingling or temporary bruising
- No standardized protocol exists yet across different machines and generators
Key Moments
Cavitation bubble mechanism behind shockwave therapy for ED
Dr. Chu explains how shockwave creates cavitation bubbles in penile tissue that collapse and cause microtrauma, recruiting growth factors that promote neoangiogenesis and tissue regeneration rather than physically breaking up plaque.
"that quick spike can basically cause carryover of some energy into deeper parts of the body. So for kidney stones, we use a much more higher power amplitude to basically break up kidney stones."
Realistic success rates from randomized controlled trials
Dr. Chu presents honest data from about 17-18 RCTs showing roughly 50% improvement rates, emphasizing that patient selection is critical and men with mild to moderate ED who respond to Cialis are the best candidates.
"if you look at all the randomized control trials that were done out there, we basically do questionnaire. That's kind of our main way of checking on a patient's symptoms and seeing for improvement."
Six treatments over three to six weeks is the current consensus protocol
Dr. Chu notes that current data supports about six shockwave treatments spread over three to six weeks, debunking radio ads claiming patients need weekly sessions for a year.
"A lot of the data right now is kind of supporting basically about six shockwave treatments. So that's kind of what I guide my patients."
