Prostate artery embolization (PAE) is a minimally invasive procedure that shrinks an enlarged prostate by cutting off its blood supply. An interventional radiologist threads a thin catheter through an artery, typically in the wrist, and injects tiny particles into the arteries feeding the prostate. Without blood flow, the excess prostate tissue dies and gradually shrinks, relieving the urinary symptoms that come with benign prostatic hyperplasia (BPH). The procedure is done on an outpatient basis, requires only local anesthesia, and most men return to normal activities the next day.
How PAE Works
The prostate depends on a network of small arteries for its blood supply. During PAE, an interventional radiologist inserts a catheter through a small puncture in the wrist (radial access) or, less commonly, the groin (femoral access). Using real-time imaging to guide the catheter through the vascular system, the radiologist navigates to the prostatic arteries on both sides and injects tiny spherical particles, each smaller than a grain of sand.
These particles lodge in the small vessels feeding the prostate, blocking blood flow. Deprived of oxygen and nutrients, the overgrown tissue undergoes necrosis and gradually atrophies. Over the following weeks to months, the prostate shrinks in size, which takes pressure off the urethra and improves urine flow. Wrist access has become the more common approach: in one large single-center study of nearly 1,000 patients, 82% had the procedure performed through the wrist, which was associated with shorter procedure times and lower radiation exposure compared to groin access.
Who Is a Good Candidate
PAE is designed for men with moderate to severe lower urinary tract symptoms caused by BPH. According to standards published by the Cardiovascular and Interventional Radiological Society of Europe, the typical inclusion criteria are a symptom score of 8 or higher on the International Prostate Symptom Score (IPSS), a quality-of-life impact score of 3 or above, and a prostate volume greater than 30 to 50 mL. Urine flow rate is also considered, with a peak flow below 15 mL per second generally pointing toward candidacy.
Men with very large prostates can still be treated, as PAE has no upper size limit. In fact, larger prostates tend to respond well because there’s more tissue dependent on the blood supply being blocked. Smaller prostates (under 50 mL) can also be treated, but the results tend to be less favorable and the procedure is technically more complex because the feeding arteries are smaller and harder to reach.
PAE is often considered for men who want to avoid general anesthesia, are poor candidates for surgery due to other health conditions, or are particularly concerned about sexual side effects associated with traditional surgery.
What the Procedure Feels Like
PAE is performed under local anesthesia, typically with some sedation to keep you comfortable. The radiologist numbs the skin at the access site (usually the wrist), makes a small puncture, and advances the catheter. You won’t feel the catheter moving through your arteries. The procedure itself generally takes one to three hours, depending on the complexity of your arterial anatomy.
Because it’s an outpatient procedure, there’s no overnight hospital stay. For comparison, a traditional surgical option like TURP (transurethral resection of the prostate) requires general anesthesia and typically a one- to three-day hospital stay. After PAE, most men go home the same day. You’ll need to avoid heavy lifting and intense exercise for a few days to protect the puncture site, but normal daily activities can usually resume the next day.
Results and Symptom Improvement
PAE produces meaningful improvement in urinary symptoms for most men. In clinical studies, men who responded well to the procedure saw their IPSS scores drop from a median of 22 (indicating severe symptoms) to 10 (mild symptoms) at follow-up. Clinical success is typically defined as at least a 25% reduction in symptom scores, with the follow-up score falling below 18.
Improvements in urinary frequency, urgency, weak stream, and nighttime waking develop gradually as the prostate shrinks. Some men notice changes within weeks, but the full benefit can take several months as the tissue continues to atrophy. The American Urological Association now includes PAE in its updated guidelines for managing BPH, reflecting the growing body of evidence supporting its use.
Sexual Function After PAE
One of the biggest concerns men have about prostate treatment is the impact on sexual function, and this is where PAE has a notable advantage. In a randomized trial comparing PAE to TURP, erectile function scores were essentially unchanged in both groups, with no significant difference between the two procedures.
Ejaculatory dysfunction is where the gap widens. After TURP, 84% of men in the trial experienced ejaculatory problems (most commonly retrograde ejaculation, where semen flows backward into the bladder instead of out through the penis). After PAE, that number was 56%. While ejaculatory changes are still possible with PAE, the risk is substantially lower than with traditional surgery.
Side Effects and Recovery
The most common side effect is post-embolization syndrome, a cluster of temporary symptoms that can appear in the first week after the procedure. These include flu-like feelings, pelvic or perineal pain, nausea, burning during urination, and a short-term worsening of urinary symptoms like urgency and frequency. These symptoms are the body’s response to tissue dying inside the prostate and typically resolve on their own within a few days. Pain medication and anti-inflammatory drugs can manage the discomfort.
Some men experience temporary urinary retention in the days following PAE, particularly those who already had significant obstruction beforehand. Serious complications are rare. Non-target embolization, where particles travel to unintended areas, has been documented but occurs infrequently and has become less common as techniques and imaging have improved.
How PAE Compares to Surgery
TURP has been the gold standard for treating BPH for decades, and it does tend to produce larger improvements in urine flow rate. PAE is not meant to replace TURP for every patient. Instead, it fills a gap for men who want a less invasive option with a faster recovery and lower risk of sexual side effects.
The practical differences between the two are significant. PAE uses local anesthesia, takes place in an outpatient setting, and involves no incisions or instruments entering the urethra. Recovery takes days rather than weeks. There’s no need for a catheter in most cases after PAE, while TURP patients typically have a catheter in place for one to three days post-surgery.
The tradeoff is that PAE may not achieve the same degree of symptom relief as TURP in every case, and some men may need a repeat procedure or eventually require surgery if their symptoms return. For men with moderate symptoms, large prostates, or concerns about anesthesia and sexual function, PAE offers a compelling middle ground between medication and surgery.