Ohio Rev. Code Ann. § 4761.01
As used in this chapter:
(A) "Respiratory care" means rendering or offering to render to individuals, groups, organizations, or the public any service involving the evaluation of cardiopulmonary function, the treatment of cardiopulmonary impairment, the assessment of treatment effectiveness, and the care of patients with deficiencies and abnormalities associated with the cardiopulmonary system. The practice of respiratory care includes: