Magnetic Resonance (MR) Guided Focused Ultrasound Surgery of Uterine Fibroids

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00131365
Recruitment Status : Completed
First Posted : August 18, 2005
Last Update Posted : March 29, 2018
Information provided by (Responsible Party):

Brief Summary:

The goal of this study is to develop additional long term data to evaluate the safety and effectiveness of this treatment.

Indications for use for this system is: 'The ExAblate is intended to ablate uterine fibroid tissue in pre- or peri-menopausal women with symptomatic uterine fibroids who desire a uterine sparing procedure. Patients must have a uterine size of less than 24 weeks and not seeking treatment for reasons of improving fertility.'

Condition or disease Intervention/treatment Phase
Leiomyoma Device: ExAblate 2000 Not Applicable

Detailed Description:



Uterine leiomyoma (fibroids) are the most common neoplasms of the female pelvis. These benign tumors are generally oval in shape, and often highly vascular. On T2 weighted MR imaging exams, or T1 exams with contrast, uterine fibroids are easily identifiable. They occur in 20-25% of women of reproductive age and can cause a variety of problems generally described as either bleeding or mass effects from the fibroid. In general, these symptoms can be classified into two categories:

  1. heavy menstrual bleeding, defined as bleeding on heavy days requiring a change of sanitary wear every 2 hours or less, significant clot passage, flooding, substantial prolongation of menstrual periods compared with the patient's prior experience, or anemia.
  2. pelvic pain or pressure, heaviness or discomfort, or similar symptoms in the back, flank or leg attributable to the bulk of the fibroid, urinary frequency, increase in nocturia, difficulty voiding or compression of the ureters with hydronephrosis.

Measures of the clinical success of patients who elect treatment of fibroids are generally subjective, and evaluated by the patient in terms of improvement in the initial symptoms that caused her to seek treatment (decrease in pain, bladder or bowel symptoms, or reduction in vaginal bleeding), while experiencing a minimum of co-morbidities from the treatment itself.

ExAblate Device:

The InSightec ExAblate MR guided Focused Ultrasound Surgery (MRgFUS) system is a non-invasive thermal ablation device fully integrated with an MR imaging system and used for the ablation of soft tissue. It has been evaluated in an earlier FDA international, multi-center study and found to be safe and effective for the treatment of uterine fibroids. ExAblate device received FDA approval in October 2004.

Prior Studies:

The ExAblate has been used for the treatment of uterine fibroids in 2 previous IDE protocols.

  • Group A: This was the original Pivotal Study Group (IDE G020001 - Protocol UF002). These 109 patients were treated at 3 sites in the US and at 4 sites outside the US. There was a limitation on the allowable treatment volume and only a single treatment was permitted. Original follow-up was planned for 6 months. The study was later extended to include follow-up visits at 12, 24, and 36 months (UF009). Because of the gap between the initial study consent, and the re-consent for the long term follow-up there was a high dropout rate at the 12 month visit. Thirty-three US patients returned for the 12 months visit, and will continue to be followed for the 24 and 36 M visits.
  • Group B: This was the Continued Access Study (IDE G020001 - Protocol UF005) where approximately 160 patients were treated at 3 sites in the US during the PMA review period. Treatment conditions were modified somewhat from the pivotal, including the addition of a second treatment session where necessary. The initial study was planned to include a long term follow-up of 12, 24 and 36 months (UF009).
  • Group C: This group of 70 patients (UF14) will be treated post-PMA approval following the commercial treatment guidelines. The follow-up will include for visits at 12, 24 and 36 months. This group includes also another 20 patients who will be treated under this original IDE to validate the ExAblate system for use in a 3T MR scanner, as well as validating a new application SW (V4.1).

Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 20 participants
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: Post Approval Study: MR Guided Focused Ultrasound Surgery in the Treatment of Uterine Fibroids
Study Start Date : January 2006
Actual Primary Completion Date : January 2009
Actual Study Completion Date : February 2009

Arm Intervention/treatment
Experimental: ExAblate MRgFUS Device: ExAblate 2000

Primary Outcome Measures :
  1. Treatment/Ablation of Uterine Fibroids [ Time Frame: Within 1 month of treatment ]

Information from the National Library of Medicine

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Ages Eligible for Study:   Child, Adult, Older Adult
Sexes Eligible for Study:   Female
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Women who present with symptomatic uterine fibroids and are not seeking treatment for the reason of improving fertility.
  • Able and willing to give consent and able to attend all study visits.
  • Patient is pre or peri-menopausal (within 12 months of last menstrual period).
  • Able to communicate sensations during the ExAblate procedure.
  • Uterine fibroids, which are device accessible (i.e., positioned in the uterus such that they can be accessed without being shielded by bowel or bone).
  • Fibroids(s) clearly visible on non-contrast magnetic resonance imaging (MRI).

Exclusion Criteria:

  • Metallic implants that are incompatible with MRI
  • Sensitive to MRI contrast agents
  • Severe claustrophobia that would prevent completion of procedure in MR unit
  • Women who are pregnant or desire to become pregnant in the future. Pregnancies following ExAblate treatment could be dangerous for both mother and fetus.
  • Pedunculated fibroids
  • Active pelvic inflammatory disease (PID)
  • Active local or systemic infection
  • Known or suspected pelvic carcinoma or pre-malignant conditions, including sarcoma and adenomatous hyperplasia
  • Intrauterine device (IUD) anywhere in the treatment path
  • Dermoid cyst of the ovary anywhere in the treatment path
  • Extensive abdominal scarring that cannot be avoided by redirection of the beam (e.g., due to Caesarean section or repeated abdominal surgeries)
  • Undiagnosed vaginal bleeding

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT00131365

United States, New York
Cornell Vascular
New York, New York, United States, 10022
Sponsors and Collaborators
Principal Investigator: Robert Min, M.D. Cornell Vascular

Additional Information:
Responsible Party: InSightec Identifier: NCT00131365     History of Changes
Other Study ID Numbers: UF014 - 4.1/3T
First Posted: August 18, 2005    Key Record Dates
Last Update Posted: March 29, 2018
Last Verified: March 2018

Keywords provided by InSightec:
Uterine Fibroids

Additional relevant MeSH terms:
Neoplasms, Muscle Tissue
Neoplasms, Connective and Soft Tissue
Neoplasms by Histologic Type
Neoplasms, Connective Tissue
Connective Tissue Diseases