Stem Cell

New treatment gives patients additional time in hours following stroke

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HOUSTON – In the hours following a stroke, the best treatment has been tissue plasminogen activator, but it has to be given within three hours, and doctors estimate only 5 percent of patients can make that window.

A new treatment that is now in clinical trial could give patients precious additional time.

Sharon Thomas is back at work like nothing was ever wrong, but four years ago, she had a stroke.

“At that time, I couldn’t read, write, swallow or speak,” Thomas said.

She was flown by helicopter to a hospital where Dr. Wayne Clark, a neurologist, began her care. He asked if she wanted to be part of a trial for a stem-cell treatment that might help her recover.

“What this does — the stem cells are from…