He probably does.
I definitely do know what he's representing is fact as I worked as an RN in various ER's and ICU's in the US, including Tampa General Hospital, Talmadge Mem. Hosp. (Med. Coll. of GA), Univ. Hosp. Augusta, GA, Blanchfield Ft. Campbell, KY, Moncrief Ft. Jackson, SC, Walter Reed, various small and small-ish county ER's and ICU's, over several decades.
My ICU experience includes open heart/cardiovascular recovery, med/general surg, burns, neuro, neonatal. Mostly worked open heart/surg and ER/ED. Neonatal was too damned depressing. Burns wasn't much better. Neuro was "different".