Only cases involving serious injury or death are worth pursuing to most lawyers. Many medical negligence lawyers will sign up cases contingent upon an expert reviewing the medical records. If the expert finds nothing then the case file is returned to the client. If you have a potential medical negligence case expect to get a second or third opinion from a lawyer. Some lawyers may not feel that the case has merit and then another one may feel differently.
Laws change frequently.
Please consult an attorney rather than relying only on this article.