A medical implant created by Austin-based company MicroTransponder can help patients who suffer ischemic strokes improve arm and hand function.

PAM Health Rehabilitation Hospital of Round Rock held an information session and screening event July 23 about the Vivistim implant.

What you need to know

The Vivistim is a small Food and Drug Administration-approved device implanted in the neck of patients with chronic ischemic seizures, MicroTransponder representative Chad Meier said.

The device stimulates the vagus nerve, releasing chemicals in the brain that help boost neuroplasticity in patients working to rebuild neural pathways after a stroke, he said.


The details

Neuroplasticity is the brain's ability to rewire itself and form new connections through repetitive actions and movements, PAM occupational therapist Paige Lashbrook said.

Patients who receive the device can experience noticeable improvement in arm and hand function after a stroke in just six weeks, she said.

"They're just scratching the surface when it comes to the possibilities of regaining function during their time in therapy," she said.


The implantation is an outpatient procedure takes about 20 minutes, and rehabilitation therapy begins seven to 10 days after. Electrodes are coiled around the vagus nerve, Meier said, and stimulated with a magnet using a wearable device on the patient's chest. The implant can remain in the body for up to five years.

Who it's for

Meier said the treatment is best suited for patients with chronic ischemic seizures who have chronic limb deficits and moderate to severe upper extremity impairment. The physical therapy regimen for Vivistim patients lasts six weeks, he said.

Additional information about this treatment is available at www.vivistim.com.