The surgeon who more than two decades ago pioneered deep brain stimulation surgery in the United States to treat people with Parkinson's disease and other movement disorders has now developed a new way to perform the surgery — which allows for more accurate placement of the brain electrodes and likely is safer for patients.
The success and safety of the new surgical technique could have broad implications for deep brain stimulation, or DBS, surgery into the future, as it may increasingly be used to help with a wide range of medical issues beyond Parkinson’s disease and familial tremors.
The new surgery also offers another distinct advantage: patients are asleep during the surgery, rather than being awake under local anesthesia to help surgeons determine placement of the electrodes as happens with the traditional DBS surgery.
"I think this will be how DBS surgery will be done in most cases going forward," said Doctor Kim Burchiel of the Oregon Health & Science University. "This surgery allows for extremely accurate placement of the electrodes and it's safer. Plus patients don't need to be awake during this surgery - which will mean many more patients who can be helped by this surgery will now be willing to consider it."
DBS surgery was first developed in France in 1987. Burchiel was the first surgeon in North America to perform the surgery, as part of a Food and Drug Administration-approved clinical trial in 1991.
The FDA approved the surgery for "essential tremor" in 1997 and for tremors associated with Parkinson's disease in 2002. The surgery has been performed tens of thousands of times over the last decade or so in the United States, most often for familial tremor and Parkinson's disease. Burchiel and his team at OHSU have performed the surgery more than 750 times.
The surgery involves implanting very thin wire electrodes in the brain, connected to something like a pacemaker implanted in the chest. The system then stimulates the brain to often significantly reduce the tremors. For most of the last two decades, the DBS patient was required to be awake during surgery, to allow surgeons to determine through monitoring the patient’s symptoms and getting other conscious patient feedback whether the electrodes were placed in the right spots in the brain.
But the traditional form of the surgery had drawbacks. Many patients who might have benefitted weren't willing to undergo the sometimes 4 to 6 hour surgery while awake. There also is a small chance of hemorrhaging in the brain as the surgeon places or moves the electrodes to the right spot in the brain.
The new technique uses advances in brain imaging in recent years to place the electrodes more safely, and more accurately, than in traditional DBS surgery. The surgical team uses CT scanning during the surgery itself, along with an MRI of the patient's brain before the surgery, to precisely place the electrodes in the brain, while better ensuring no hemorrhaging or complications from the insertion of the electrode.
COMPAMED.de; Source: Oregon Health & Science University