speculating that, if Taz is telling the truth about an icebath on Wed nite, and Anna saying ‘no no’, that a struggle to get her in the tub occurred, which might be where the bit tongue and bruises came from - ‘the fall’. imo a patient with 105 temp would sip anything given to them - 105 temp is delerium - the brain is literally cooking - barely conscious, no tensile strength in limbs, hallucinating, etc. here Anna, drink this and we’ll let you out of this ice water that’s giving you frostbite.
How about pouring a mixture of Chloral Hydrate down her throat and then holding her mouth shut...not realizing that her tongue was in the way (since IIRC, it was the tip).