Relationship between hyponatremia and perception and treatment Method Hyponatremia Normal OR (95% CI) p Glasgow ≤ 8 41 (64, 1%) 23 (35, 9%) 2, 4 (1, 4 - 4, 1) 0, 002 >8 139 (42, 9%) 185 (57, 1%) Mannitol 20% Yes 144 (51.8%) 134 (48.2%) 2, 3 (1, 4 - 3, 6 < 0, 05 No 35 (32.1%) 74 (67.9%) 1 Furosemid Yes 98 (50.0%) 98 (50.0%) 1, 4 >0, 05 No 81 (42.4%) 110 (57.6%) 1 With oxygen respirator Yes 54 (65, 1%) 29 (34, 9%) 2, 6 (1, 6 - 4, 4) <0, 001 No 126 (41, 3%) 179 (58, 7%) Commment: The rate of patients infused 20% mannitol and having hyponatremia (51.8%) was 2.3 times higher than patients with normal serum sodium concentration.