Focused ultrasound surgery (FUS) is a noninvasive treatment option for uterine fibroids — noncancerous growths of the uterus.
Also called magnetic resonance-guided focused ultrasound surgery or focused ultrasound ablation, this treatment happens while you're inside an MRI scanner equipped with a high-energy ultrasound transducer.
The MRI scans give your doctor the precise location of a uterine fibroid and the locations of nearby structures to be avoided, such as the bowel and bladder. While the MRI monitors the targeted fibroid and surrounding structures, the ultrasound transducer delivers focused sound waves into the fibroid. The sound waves heat and destroy small areas of fibroid tissue until most or all of the fibroid is destroyed.
Focused ultrasound surgery isn't widely available, but is done at specialized clinics.
Focused ultrasound surgery:
Although focused ultrasound surgery offers many advantages over other fibroid treatment options, it's not the best option for everyone. It may not be a good choice for you if:
Focused ultrasound may be an option for women who still want to have children. A number of women have had successful pregnancies after treatment, and the treatment appears to be safe. However, more study is needed on the possible long-term effects on a woman's ability to have a successful pregnancy.
Rarely, focused ultrasound surgery results in:
Other drawbacks specific to focused ultrasound surgery include:
It's possible that focused ultrasound won't be able to treat all of your fibroids. In addition, you may need further treatment if your symptoms return.
To determine whether you're a good candidate for focused ultrasound surgery, your doctor may perform a pelvic MRI scan before treatment. Your doctor will also need to administer a pregnancy test prior to the procedure.
An MRI uses a magnetic field to create detailed pictures of the inside of your body. Metal objects on — or in — your body may interfere with the magnetic field. This can affect the quality of the MRI, may damage electronic items and can possibly cause a safety problem.
If possible, leave jewelry or metal or electronic accessories at home, as you'll be asked to leave these items in the dressing room before the procedure.
Tell the technologist if you have any metal or electronic devices inside your body, such as metallic joint prostheses, artificial heart valves, implanted electronic devices, cochlear implants or body piercings.
The day of treatment you'll need to shave your lower abdomen between your pubic bone and bellybutton.
Focused ultrasound surgery is performed as an outpatient procedure in an MRI scanning room. You may be asked to fast for hours before the procedure.
Shortly before the procedure begins, you'll have:
During your treatment, MRI allows doctors to evaluate the effects and define areas that need additional treatment.
Treatment time varies, depending on the size and number of fibroids you have, though you can expect it to take around three hours. Here's what happens during the procedure:
You'll need a friend or family member to drive you to and from your treatment, and to stay with you at least five hours after the procedure due to the medications you receive during treatment.
You can usually resume your normal daily activities within a day of the procedure. Over-the-counter pain-relieving drugs, such as ibuprofen or acetaminophen, can be used to treat any discomfort.
It takes months, and sometimes even years, for your body to gradually absorb the treated tissue. But most women notice significant improvement in their fibroid-related symptoms within the first few months after focused ultrasound surgery.
If fibroids return, you may need a second procedure to treat them. The need for repeated treatment may be more common in women who've had focused ultrasound compared with other fibroid treatments, such as uterine artery embolization.