My husband was in a bike accident treated for bleeding in brain and was with ventilator support for a day then he was shifted to neuro ICU since he responded well . He s still.in ICU for two weeks now , remembers everything going for little walks during physiotherapy ( also has rib and clavicle fracture) but his sodium levels are fluctuating between 127 to 133 and 115 and his CT s also revealed slightly increased swelling . Is this life threatening even wen he is conscious and speaking