What options are available for extending a visa in Thailand when unable to leave the country due to medical reasons?

Hi, we are currently on a 3 months visa that ends in about a month. we were planning to do a visa exempt through Ranang (we are a family of 4 from Israel) unfortunately my wife has a medical issue in which she can't drive/fly more than 30 minutes, we have a doctor approval from the hospital here. So we probably cant do the visa run...what do we do in such a situation? is there a way of extending her stay without her leaving the country? thanks