|Description||A measure of blood tonicity / concentration|
|Indication||Assessment of fluid and electrolyte balance.
|Additional Info||Please note: test can only be added to samples within 6 hours of collection (adults) OR within 2 hours of collection (paediatric)|
|Interpretation||Increased in water depletion, hyperosmolar nonketotic diabetic coma, DKA, DI, increased calcium, alcohol. Decreased in adrenocorticoid insufficiency, water intoxication, SIADH.
|Tube||Serum or Heparin|
|Collection Conditions||Use Gold top (serum gel) tube except for Intensive care units, renal unit, transplant unit, patients on IV heparin (use Green/yellow top tube for these patients).|
|Min. Vol||1 mL|
|Ref. Range (Male)||275 - 295|
|Ref. Range (Female)|| 275 - 295|
|Ref. Range (Paed)|| |
|Ref. Range Notes||
|IP Acute TAT||Refer to Website|
|IP Routine TAT||Refer to Website|
|GP Acute TAT||- Contact Laboratory|
|GP Routine TAT||Refer to Website|
|Turnround Comment||Osmolality analysis will only be treated as urgent if the lab is contacted, and in such instances will have a TAT of 3hrs|
Originally edited by : MC. Review due on 10/04/2019 14:13:06. Published By S.Bennett on 10/04/2018 14:13:06.