Recently had stroke from pfo--had pfo closed--anyone know how long numbness will last?

Hard to say: A good rule of thumb if the numbness persists more than 6 months then it is likely to stay.

Could be long: The closure of the pfo has nothing to do with your ongoing stroke symptoms. The damage from the stroke could take months or even be permanent. The pfo was closed to try and keep stroke from happening again, not to make your symptoms go away. Also you should realize that pfo closure after stroke is a bit controversial. Recent studies suggest that it may not do any good.