Hemorrhoidal Artery Embolization (HAE)

Hemorrhoids are clusters of vascular tissue, smooth muscle, and connective tissue that line the anal canal and rectum. They are normal anatomical structures that help with stool control. Problems arise when they enlarge, prolapse, or engorge with blood. Internal hemorrhoids (above the dentate line) are fed by the superior rectal artery branches and typically present with painless rectal bleeding — often seen as bright red blood on toilet paper or dripping into the toilet bowl. Because internal hemorrhoids lack pain-sensitive nerve fibers, the bleeding is usually the only symptom until they prolapse. Chronic blood loss can lead to iron-deficiency anemia, fatigue, and significantly impaired quality of life.

Rubber band ligation (RBL) places elastic bands around individual hemorrhoids via an anoscope inserted into the rectum — it treats hemorrhoids one at a time and often requires multiple sessions. It’s effective but can cause significant pain, especially if bands slip below the dentate line. Hemorrhoidectomy is surgical excision under anesthesia and carries real recovery burden (2–4 weeks of significant anal pain). HAE is fundamentally different: it approaches hemorrhoids entirely from the vascular system, threading a catheter through an artery in the wrist or groin to reduce the blood supply feeding all hemorrhoidal tissue simultaneously — with no instrument ever entering the rectum. HAE is particularly suited to patients who have failed or wish to avoid anorectal procedures.

HAE is best suited for patients with grade I–III internal hemorrhoids who present with recurrent or chronic rectal bleeding as their primary complaint. Ideal candidates have failed conservative management (dietary fiber, sitz baths, topical agents) or have undergone prior ligation with recurrence. Patients on anticoagulation who cannot safely undergo anorectal procedures are excellent candidates, as HAE can often be performed without full anticoagulation reversal. HAE is primarily a treatment for bleeding; it is less effective for grade IV prolapsed hemorrhoids or predominantly painful external hemorrhoid disease.

No bowel preparation is required for HAE — this is one of its major practical advantages over colonoscopy or anorectal procedures. You will be asked to fast for 4–6 hours before the procedure (nothing by mouth after midnight for a morning case), but no laxatives, enemas, or dietary restriction is needed. Simply arrive at our office-based lab as directed, and our team will handle all preparation.

After IV access is placed and mild conscious sedation administered, Dr. Chahal gains arterial access at the wrist or groin (typically the right radial artery). A microcatheter is advanced under fluoroscopic guidance through the aorta and into the superior rectal artery, which supplies blood to the hemorrhoidal plexus. Angiography (X-ray contrast dye injection) maps the feeding vessels precisely. Small embolic microspheres or platinum microcoils are then deployed to reduce — but not completely eliminate — arterial inflow to the hemorrhoids. This controlled reduction causes the engorged hemorrhoidal tissue to shrink and the bleeding to resolve. The entire procedure takes about 45 minutes; you recover briefly on-site and go home the same afternoon.

Many patients notice reduced or stopped bleeding within the first 1–2 weeks post-procedure. Full clinical response, including maximum tissue shrinkage, typically develops over 4–8 weeks. Published series report an 89% technical success rate with clinical bleeding resolution in 82–85% of patients at 12-month follow-up. Response rates are highest in patients with grade I–II hemorrhoids; grade III patients also respond well though may occasionally require a repeat session.

HAE is one of the most comfortable procedures we offer. Because the approach is entirely through the vascular system, there is no anorectal instrumentation and therefore no anal pain. Patients may notice mild pelvic pressure or cramping for 24–48 hours after the procedure — this is the post-embolization response and resolves quickly with ibuprofen. No narcotics are typically needed. Most patients return to desk work the next day and resume full activity within 3–5 days. There are no dietary restrictions, no wound care, and no limitations on bowel habits.

HAE has a favorable safety profile. The most common side effect is mild post-procedural pelvic discomfort lasting 24–72 hours. Serious complications are rare (<2%) and can include: non-target embolization causing rectal mucosal ischemia (extremely rare when performed by experienced operators using careful technique), access-site bruising at the wrist, or transient fever. No cases of rectal perforation, sphincter damage, or incontinence have been reported in published HAE series — a significant safety advantage over surgical hemorrhoidectomy.

As with all hemorrhoid treatments, recurrence is possible, particularly if dietary and lifestyle factors (low fiber intake, straining, sedentary habits) are not addressed. Published recurrence rates at 2 years are approximately 15–20%, comparable to rubber band ligation. If symptoms recur, HAE can be repeated, or alternative treatments pursued. Many patients find that adopting a high-fiber diet and adequate hydration after HAE provides long-term durable relief.

HAE is a relatively new procedure and coverage is evolving. Some commercial insurers and Medicare Advantage plans cover it under embolization billing codes when documentation supports medical necessity (recurrent bleeding, failed conservative management, imaging-confirmed hemorrhoidal disease). Our team provides complete prior authorization support and will work with your insurer before scheduling. We will be transparent about any expected out-of-pocket costs prior to your procedure date.