It is difficult to properly evaluate your case from a legal standpoint in an internet forum. This is because all malpractice cases are extremely fact specific and unique. The best advice that I can give you is to consult with an experienced medical malpractice attorney so that he/she can discuss the specific facts with you, review the medical records, and ascertain whether legal action is appropriate given the circumstances of your case.
You should do so very quickly though. In Ohio, medical malpractice cases have a very short statute of limitations, sometimes as short as one year from the date of the alleged event that caused the injury. This time can sometimes be extended, but it is never a sure bet. So you should consult with an experienced malpractice attorney right now. These cases take a considerable amount of time to evaluate and investigate, and there is such a limited amount of time to do so. Do not delay. Call an attorney today!
Best of luck to you and your husband.