Ohio state law requires that a plaintiff file an affidavit of merit with their complaint in a medical malpractice case. An affidavit of merit states to the court that the plaintiff’s claim is credible. The affiant, or expert filing the affidavit, must declare under oath that they have reviewed all of the plaintiff’s available medical records, are familiar with the medical standard of care that applies to the plaintiff’s situation, believe the medical professional deviated from the standard of care,  and believe the plaintiff’s injuries resulted directly from the failure to uphold this standard.