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Federal Regulations. These federal regulations for door handle height state that door handles must be at least 48 inches from the floor level. They must also be easy to operate with one hand without a tight grasp or a twisting of the wrist. Acceptable types of handles include U-shaped, push-type, and lever-type handles or mechanisms.
Additionally, copper door handles have been shown to be effective at suppressing bacterial growth. Source: Wojgani H, Kehsa C, Cloutman-Green E, Gray C, Gant V, et al. (2012) Hospital Door Handle Design and Their Contamination with Bacteria: A Real Life Observational Study.