The Edge of Medicine
|Abigail Klein Leichman||March 20th 2013|
Surgery without scalpels and scars? It’s not science fiction. Israel’s InSightec is in the midst of transforming the operating room with its ExAblate MRI-guided high-intensity ultrasound---a new ultrasound technology that enables surgeons to destroy tumors and cysts without incisions.
The ExAblate O.R. system uses interchangeable “cradles” set on a regular MRI treatment table. The tool allows doctors to destroy targets, such as tumors and uterine fibroid cysts, deep inside the body without incisions. The alert patient is monitored in real time, and changes in treatment parameters can be made instantly. While the ExAblate system garners kudos – The Wall Street Journal’s Technology Innovation Award, the European Union’s Information Society Technologies grand prize, TIME magazine’s list of 50 best inventions of 2011 – InSightec has been gaining regulatory approvals, moving ahead with clinical trials and closing a $30.9 million financing round.
Gynecology and Oncology Uses:
ExAblate O.R. is already being used in several countries, including Europe and the United States, to treat uterine fibroids and pain caused by bone cancer. “We started with uterine fibroids, which afflict a quarter of all women sometime in their lives and usually are treated with a hysterectomy,” says InSightec president and founder Kobi Vortman. “We believe for patients looking for alternative treatment to preserve the uterus, this is effective and safe.” More than 9,000 patients in the United States, Europe and Asia have been able to avoid surgery as the Israeli technology has successfully destroyed fibroids through ultrasound.
A two-venue study begun in January at the Mayo Clinic and at Duke University is determining how ExAblate compares with the usual treatment for fibroids, the invasive uterine artery embolization. Meant to gather data for medical insurance reimbursement purposes, the study is to include about 200 patients over three years at the two centers.In October 2012, the US Food and Drug Administration (FDA) approved ExAblate’s use in alleviating pain from cancerous bone tumors. A randomized international clinical trial at 10 to 15 sites will soon begin comparing ExAblate with radiation therapy – currently the gold standard for the pain of metastasized bone cancer – as a first line of defense for newly diagnosed patients.
Getting Past the Blood/Brain Barrier:
Meanwhile, InSightec’s related product, ExAblate Neuro, recently received the CE Mark in Europe for the treatment of three common neurological disorders: essential tremor, neuropathic pain and Parkinson’s disease tremors. In the United States, the system is undergoing FDA-approved safety and effectiveness trials in these three areas. Using focused ultrasound in the brain is revolutionary because it gets past the blood-brain barrier as drugs cannot. As opposed to surgery and ionizing radiation, two current alternatives to treat these conditions, ExAblate Neuro leaves the patient’s skull intact and is entirely non-invasive.
Neurosurgeons and physicists at leading research hospitals in Switzerland, Korea, Japan, Canada and the United States are currently experimenting with ExAblate Neuro – which was invented by a Toronto imaging researcher and developed at InSightec — to treat essential tremor, a common movement disorder affecting millions of people worldwide. Patients who do not respond to medication often have to resort to surgical implantation of deep brain stimulating electrodes, or radiosurgery with ionizing radiation. “Essential tremor is a relatively clear-cut disease with a single symptom,” Vortman tells ISRAEL21c. “With ExAblate Neuro, we found that at the end of a single treatment, 15 patients suffering for years from this debilitating disease are back to themselves again.” The doctor can monitor and communicate with the patient and adjust treatment during the procedure.
While only time will tell how long the effects will last in those trial patients, Vortman is encouraged by the results. “We hope that if we have the ability to succeed for one year, we also have the ability to succeed for many years,” he says. The first essential tremor patients in a Phase III study are expected to be enrolled this year, with the hope of devising a full treatment protocol by the end of next year in order to receive FDA approval for this application. Vortman says that InSightec technology will one day be the treatment of choice also for epilepsy, dissolving blood clots and getting drugs delivered to specific targets in the body.
With the exception of lung tumors, and cardiac and orthopedic procedures to repair functionality, ExAblate has almost limitless applications, says Vortman, who has degrees in electrical engineering and electro-optics from the Technion-Israel Institute of Technology. The company, based in Tirat Carmel in the north with a second office in Or Yehuda near Tel Aviv, was founded in 1999 and has 125 employees. It is privately held by Elbit Imaging, General Electric and MediTech Advisors.
Abigail Klein Leichman is a writer and associate editor at ISRAEL21c. Prior to moving to Israel in 2007, she was a specialty writer and copy editor at a daily newspaper in New Jersey and has contributed to quite a variety of newspapers and periodicals since 1984.