What is UFE?
Uterine Fibroids are noncancerous tumors that can develop during a woman’s childbearing years and cause symptoms including heavy menstrual bleeding, prolonged periods, and pelvic pain.
Uterine fibroid embolization (UFE) is a minimally invasive treatment for fibroid tumors of the uterus. The procedure is also sometimes referred to as Uterine Artery Embolization (UAE), but this term is less specific and, as will be discussed below, UAE is used for conditions other than fibroids.
Fibroid tumors, also known as myomas, are benign tumors that arise from the muscular wall of the uterus. It is extremely rare for them to turn cancerous. More commonly, they cause heavy menstrual bleeding, pain in the pelvic region, and pressure on the bladder or bowel.
In a UFE procedure, physicians use an x-ray camera called a fluoroscope to guide the delivery of small particles to the uterus and fibroids. The small particles are injected through a thin, flexible tube called a catheter. These block the arteries that provide blood flow, causing the fibroids to shrink. Nearly 90 percent of women with fibroids experience relief of their symptoms.
Because the effect of uterine fibroid embolization on fertility is not fully understood, UFE is typically offered to women who no longer wish to become pregnant or who want or need to avoid having a hysterectomy, which is the operation to remove the uterus.
How is UFE diagnosed and evaluated?
Imaging of the uterus by magnetic resonance imaging (MRI) or ultrasound is performed prior to the procedure to determine if fibroid tumors are the cause of your symptoms and to fully assess the size, number and location of the fibroids.
Occasionally, your gynecologist may want to take a direct look at the uterus by performing a laparoscopy. If you are bleeding heavily in between periods, a biopsy of the endometrium (the inner lining of the uterus) may be performed to rule out cancer.
How are Uterine Fibroids treated?
UFE is an image-guided, minimally invasive procedure that uses a high-definition x-ray camera to guide a trained specialist, most commonly an interventional radiologist to introduce a catheter into the uterine arteries to deliver the particles. The procedure is typically performed in a cath lab or occasionally in the operating room.
You will be positioned on the examining table.
You may be connected to monitors that track your heart rate, blood pressure and pulse during the procedure.
A nurse or technologist will insert an intravenous (IV) line into a vein in your hand or arm so that sedative medication can be given intravenously. Moderate sedation may be used. As an alternative, you may receive general anesthesia.
The area of your body where the catheter is to be inserted will be sterilized and covered with a surgical drape.
Your physician will numb the area with a local anesthetic.
A very small skin incision is made at the site.
Using x-ray guidance, a catheter is inserted into your femoral artery, which is located in the groin area. A contrast material provides a roadmap for the catheter as it is maneuvered into your uterine arteries. The embolic agent is released into both the right and left uterine arteries by repositioning the same catheter that was originally inserted. Only one small skin puncture is required for the entire procedure. See the Catheter Embolization page for more information.
At the end of the procedure, the catheter will be removed and pressure will be applied to stop any bleeding. The opening in the skin is then covered with a dressing. No sutures are needed.
Your intravenous line will be removed.
You will most likely remain in the hospital overnight so that you may receive pain medications and be observed.
This procedure is usually completed within 90 minutes.
- Uterine fibroid embolization, done under local anesthesia, is much less invasive than open or laparoscopic surgery to remove individual uterine fibroids (myomectomy) or the whole uterus (hysterectomy).
- No surgical incision is needed—only a small nick in the skin that does not have to be stitched.
- Patients ordinarily can resume their usual activities much earlier than if they had surgery to treat their fibroids.
- As compared to surgery, general anesthesia is not required and the recovery time is much shorter, with virtually no blood loss.
- Follow-up studies have shown that nearly 90 percent of women who have their fibroids treated by uterine fibroid embolization experience either significant or complete resolution of their fibroid-related symptoms. This is true both for women who have heavy bleeding as well as those who have bulk-related symptoms including urinary frequency, pelvic pain or pressure. On average, fibroids will shrink to half their original volume, which amounts to about a 20 percent reduction in their diameter. More importantly, they soften after embolization and no longer exert pressure on the adjacent pelvic organs.
- Follow-up studies over several years have shown that it is rare for treated fibroids to regrow or for new fibroids to develop after uterine fibroid embolization. This is because all fibroids present in the uterus, even early-stage nodules that may be too small to see on imaging exams, are treated during the procedure. Uterine fibroid embolization is a more permanent solution than the option of hormonal therapy, because when hormonal treatment is stopped the fibroid tumors usually grow back. Regrowth also has been a problem with laser treatment of uterine fibroids.
- Any procedure that involves placement of a catheter inside a blood vessel carries certain risks. These risks include damage to the blood vessel, bruising or bleeding at the puncture site, and infection. However precaution is taken to mitigate these risks.
- When performed by an experienced interventional radiologist, the chance of any of these events occurring during uterine fibroid embolization is less than one percent.
- Any procedure where the skin is penetrated carries a risk of infection. The chance of infection requiring antibiotic treatment appears to be less than one in 1,000.
- There is always a chance that an embolic agent can lodge in the wrong place and deprive normal tissue of its oxygen supply.
- An occasional patient may have an allergic reaction to the x-ray contrast material used during uterine fibroid embolization. These episodes range from mild itching to severe reactions that can affect a woman’s breathing or blood pressure. Women undergoing UFE are carefully monitored by a physician and a nurse during the procedure, so that any allergic reaction can be detected immediately and addressed.
- Approximately two to three percent of women will pass small pieces of fibroid tissue after uterine fibroid embolization. This occurs when fibroids located inside the uterine cavity detach after embolization. Women with this problem may require a procedure called D & C (dilatation and curettage) to be certain that all the material is removed to prevent bleeding or infection from developing.
- In the majority of women who undergo uterine fibroid embolization, normal menstrual cycles resume after the procedure. However, in approximately one percent to five percent of women, menopause occurs after uterine fibroid embolization. This appears to occur more commonly in women who are older than 45 years.
- Although the goal of uterine fibroid embolization is to cure fibroid-related symptoms without surgery, some women may eventually need to have a hysterectomy because of infection or persistent symptoms. The likelihood of requiring hysterectomy after uterine fibroid embolization depends on how much time elapses until menopause. The younger the patient, the greater the tendency to develop new fibroids or recurrent symptoms.
- Women are exposed to x-rays during uterine fibroid embolization, but exposure levels usually are well below those where adverse effects on the patient or future childbearing would be a concern.
- The question of whether uterine fibroid embolization impacts fertility has not yet been answered, although a number of healthy pregnancies have been documented in women who have had the procedure. Physicians may recommend that a woman who wishes to have more children consider surgical removal of the individual tumors rather than undergo uterine fibroid embolization. If this is not possible, then UFE may still be the best option.
- It is not possible to predict whether the uterine wall is in any way weakened by UFE, which might pose a problem during delivery. Therefore, the current recommendation is to use contraception for six months after the procedure and to undergo a Cesarean section during delivery rather than to risk rupture of the wall of the uterus from the intense muscular contractions that occur during labor.