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Prostate Artery Embolization (PAE): How It Works and What to Expect

Written by David Shusterman, MD, board-certified urologist, adapted from his book Shrink the Prostate. General information, not medical advice for your situation. Who publishes this site.

Prostate artery embolization (PAE) is a minimally invasive, image-guided procedure that shrinks an enlarged prostate by reducing its blood supply. A specialist called an interventional radiologist threads a thin catheter through a tiny puncture in the wrist or groin, places microscopic particles in the arteries that feed the prostate, and the overgrown tissue shrinks over the following weeks. Nothing passes through the urethra, no tissue is cut, there is no general anesthesia, and most men go home the same day. For benign prostatic hyperplasia (BPH), PAE is a first-line procedure option.

How PAE works

Like every organ, the prostate depends on blood flow. In BPH, the overgrown tissue that pinches the urethra relies heavily on a strong arterial supply. During PAE, tiny particles called microspheres, roughly 100 to 500 microns across and far smaller than a grain of sand, are released into the prostate’s arteries. They lodge in the small vessels and cut off the extra blood flow to the overgrown tissue, while the gland’s framework and capsule are left essentially untouched.

Starved of oxygen, the overgrown tissue slowly shrinks from the inside out, and the channel it was squeezing opens up. Because the body does this work over weeks, PAE does not give instant results the way surgery can. Instead, there is a steady improvement. The same embolization technique has been used for years to treat uterine fibroids, tumors and internal bleeding.

Who is a candidate

PAE suits most men with bothersome BPH, especially those with moderate to larger prostates. It is particularly appealing for men who want to protect their sexual function, men who want to avoid anesthesia or a hospital stay, men on blood thinners, and men whose symptoms came back after earlier prostate surgery. Age is rarely a barrier, because the procedure asks so little of the body.

The main exception is anatomical. Rarely, the arteries to the prostate are too narrowed, calcified or blocked for a catheter to reach. That is why candidates have their pelvic arteries mapped with imaging, usually a CT angiogram or MRI, before anything is promised. A median lobe (prostate tissue that pushes up into the bladder) does not rule out PAE, but it is something the team should look for, because it can change the plan.

The workup before PAE usually includes your IPSS symptom score, a flow test, a post-void residual, prostate ultrasound, PSA blood test and urinalysis.

What happens on the day

• Preparation: you arrive fasting, receive antibiotics and, if needed, a mild sedative.
• Access: under light sedation (relaxed, not unconscious), the radiologist numbs the skin and makes a small puncture in the wrist (radial artery) or groin (femoral artery).
• Mapping: using contrast dye and live X-ray, the radiologist finds the prostate’s arteries and checks for small branches heading toward the bladder, rectum or penis, which must be avoided.
• Embolization: microspheres are delivered to one side of the prostate and then the other, since both sides need treatment.
• Closure: the puncture is sealed with pressure, a closure device or a wrist band. Most men rest for one to two hours and go home the same day.

The procedure usually takes one to two hours. Most men describe pressure rather than pain, and you will need someone to drive you home.

Recovery and when you will feel better

A urinary catheter is not needed in the vast majority of cases. For the first few days, many men feel mild pelvic aching, tiredness or a low-grade fever. This is called post-embolization syndrome. It is the body reacting to the treated tissue, it passes on its own, and it is usually managed with over-the-counter medicine and fluids.

As the gland remodels, some men have a few weeks of urinary irritation: frequency, urgency or burning. It is usually mild and fading by week two or three, though it can come and go for up to about six weeks, and it tends to be more noticeable in men with a large median lobe.

A typical timeline looks like this:

• Days 1 to 3: mild fatigue or achiness; light activity right away.
• Weeks 1 to 2: first improvement in the stream.
• Weeks 3 to 6: clear drop in urgency, nighttime trips and flow problems.
• About 3 months: close to full benefit, with continued remodeling after that.

Judge the result at three months, not three days.

Results, durability and sexual function

Across many studies, PAE improves the IPSS symptom score by about 12 to 20 points, a change that matches or nearly matches traditional surgery. In the UK-ROPE study, the average improvement was 15 points at 12 months. The prostate typically shrinks by 20 to 40%, and peak urine flow often reaches 12 to 15 mL per second at three to six months.

The results hold up. Studies with five or more years of follow-up show sustained symptom relief in most men. About 10 to 20% need a repeat treatment within five years, often because one side was not fully treated or new small arteries grew in. Because nothing was cut out, PAE can be repeated, and other options such as Rezūm or surgery remain fully available.

The biggest difference from surgery is sexual function. Retrograde ejaculation (semen going backward into the bladder) is reported in fewer than 5 to 10% of men after PAE, compared with 60 to 75% after TURP, and PAE shows no significant effect on erections. Serious complications, such as particles reaching another pelvic organ, are rare when the procedure is done by an experienced team with proper imaging.

See how PAE stacks up against other procedures in PAE vs Rezūm vs UroLift and TURP, HoLEP and when surgery is needed.

Choosing a PAE team

PAE results depend on the team. Prostate arteries can be barely a millimeter wide and vary from man to man, so experience matters. Ask:

• How many embolizations has the interventional radiologist performed?
• Who selects patients: a urologist who measured my prostate and bladder, or a scheduler?
• Who manages my recovery and follow-up, and do the urologist and radiologist work together?
• Has my insurance been checked and pre-authorized?

This is general information, not medical advice for your situation. A urologist can tell you whether PAE fits your prostate and connect you with an experienced team.

Frequently asked questions

Is prostate artery embolization painful?

Most men feel pressure rather than pain during PAE, because it is done under light sedation and the wrist or groin is numbed first. Some have pelvic aching or burning with urination for a few days or weeks afterward, usually managed with over-the-counter medicine.

Will I need a catheter after PAE?

In the vast majority of cases, no. PAE never touches the urethra, so most men go home the same day with a small bandage at the wrist or groin.

How long until PAE works?

Most men notice the first improvement within one to two weeks, with clear gains by weeks three to six. Near-full benefit usually arrives around three months as the prostate keeps shrinking.

Does PAE affect sex?

Retrograde ejaculation is reported in fewer than 5 to 10% of men after PAE, compared with 60 to 75% after TURP, and studies show no significant effect on erections.

Can PAE be repeated if symptoms return?

Yes. About 10 to 20% of men need retreatment within five years, and because nothing is cut out, PAE can be repeated. Rezūm or surgery also remain available.