When First-Line ED Treatments Stop Working
Some erectile dysfunction resists every non-surgical option.
- 30–35%: PDE5 inhibitor failure (no response)
- ~50%: Injection dropout (stop within 2 yrs)
- ~10%: Vacuum device use (long-term adherence)
- 30M+: Men affected (US) (some degree of ED)
Why oral drugs fail
Nerve or vascular damage blunts PDE5 inhibitor response.
Injection and vacuum limits
Pain, scarring, or poor spontaneity drive discontinuation.
Refractory ED means implant surgery is often the most reliable remaining option.
Choosing Between Inflatable and Malleable Implants
Patient goals and anatomy guide the device selection.
- ~80%: Inflatable implant share (of US placements)
- ~20%: Malleable implant share (simpler mechanism)
- 2–4 wk: Preop evaluation time (workup and counseling)
- 10–15 yr: Device lifespan (typical durability)
Inflatable device rationale
Pump-controlled inflation gives a more natural flaccid state.
Malleable device rationale
Bendable rods suit patients needing simpler dexterity.
Shared decision-making weighs manual dexterity, cost, and mechanical risk.
Surgical Placement Within the Corpora Cavernosa
Cylinders are inserted into the paired erectile chambers.
- 45–90 min: Surgery duration (typical placement time)
- Infrapubic/penoscrotal: Approach (common incisions)
- ~2–3%: Infection rate (first-time surgery)
- Same day: Hospital stay (outpatient in most cases)
Corporal dilation
Cavernosal tissue is dilated to accept cylinder sizing.
Cylinder seating
Sized cylinders are threaded into each corporal body.
Precise sizing prevents future erosion or inadequate rigidity.
Fluid System Enables On-Demand Inflation
A scrotal pump and abdominal reservoir control cylinder fluid.
- ~100 mL: Reservoir volume (saline fluid capacity)
- <1 min: Inflation time (pump cycles to erect)
- 3: Mechanical parts (cylinders, pump, reservoir)
- ~5–10%: Revision rate (10 yr) (mechanical failure)
Pump placement
Pump bulb sits in the scrotum for manual control.
Reservoir connection
Tubing links reservoir, pump, and cylinders in a closed loop.
Squeezing the pump shifts fluid to inflate cylinders on demand.
Reliable Mechanical Erection After Healing
Healed patients report high satisfaction and spontaneity.
- ~92%: Patient satisfaction (inflatable devices)
- ~85%: Partner satisfaction (reported outcomes)
- 4–6 wk: Healing period (before full activation)
- ~95%: Device survival (5 yr) (mechanically intact)
Activation timeline
Device is activated roughly six weeks after surgery.
Long-term function
Most men resume satisfying intercourse within two months.
Implant surgery offers the highest satisfaction rate among ED therapies.