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intensivist

a. (context medicine English) Of or pertaining to intensive care n. (context medicine English) A practitioner of intensive care

Wikipedia
Intensivist

An intensivist is a physician ( M.D. or D.O.) who specializes in the care of critically ill patients, most often in the intensive care unit (ICU). Intensivists can be internists or internal medicine sub-specialists (most often pulmonologists), anesthesiologists, emergency medicine physicians, pediatricians (including neonatologists), or surgeons who have completed a fellowship in critical care medicine. The intensivist must be competent not only in a broad spectrum of conditions common among critically ill patients but also with the technical procedures and devices (i.e. mechanical ventilators) used in the intensive care setting.