“Mother's stroke and brain affected - esp. swallowing function?”

My mother, 81, suffered a "stroke" during an operation to place stents on her arteries (90% blockage, we were told), during which one of the arteries burst. She was revived but doctors said a part of her brain had suffered from lack of oxygen. One of the functions affected was the "swallow function." It has been a year now since the "event" and she is still on a Ryles tube, unable to swallow even water.

Also, she cannot swallow her secretions so she has had a non-stop case of cough. We need to use the suction machine on her 2/3/4 times a day. My mother is mostly bedridden - too weak it seems to move on her own - and is on several meds, including blood-thinners and some anti-depressants.

All doctors have told us that there is no cure and no real timeline to the brain "healing." The only improvement that may come about is when other neurons take over the impaired functions, but that does not seem to have happened. Any other insights into such conditions? Any current, breakthrough treatments that one can look into?