Correct spelling for the English word "atmiatrics" is [ˌatmɪˈatɹɪks], [ˌatmɪˈatɹɪks], [ˌa_t_m_ɪ__ˈa_t_ɹ_ɪ_k_s] (IPA phonetic alphabet).
1. Pneumatotherapy. 2. The use of sprays in the treatment of diseases of the respiratory passages.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.