It is too difficult to ascertain whether or not you have a potential claim against the rehab facility without reviewing the medical records. It would be in your best interest to have an attorney discuss this matter with you personally and properly advise you after having a chance to fully investigate the circumstances of your wife’s potential claim. You have a very limited amount of time to pursue a claim against all responsible parties, so I would advise that you do consult with an attorney as quickly as possible so that you do not miss the firm deadline to pursue the claim.
Best of luck.