Severe 170 above
Calculate the osmolarity too
2Na + glucose + urea
Symptom base on osmolarity
375 ataxia, irritability
400 seizure, coma, lethargy
Differential diagnosis as picture
Calculate rate of infusion from here: https://www.mdcalc.com/sodium-correction-rate-hyponatremia-hypernatremia
Correction rate not more than 0.5mmol/L/H
Not more than 10mmol/L/Day
Too fast will cause cerebral edema.
*Resuscitation fluid is always NS or HM. Only choose desire type of fluid after patient hemodynamically stable.