Category
Routine Chemistry
Sub Category
ELECTROLYTES
Synonym/Aliases
OSMOLALITY FREEZING POINT
Abbreviations
N/A
Type
INDIVIDUAL TEST
Results
RESULTS READY WITHIN 5 WORKING DAYS
Method
FREEZING POINT DEPRESSION
Temp
SAMPLE KEPT ATROOM TEMPERATURE 1 DAY; 2-8ºC 7 DAYS; FROZEN >30 DAYS.
Setup
ALL WORKING DAYS
Components Parameters
N/A
PRE-ANALYTIC CONSIDERATIONS
Test Ordering Instructions
FILL OUT TEST REQUEST FORM FULLY & LEGIBLY.
Patient preparation
NOT APPLICABLE
Sample type
SERUM
Container/ preservative
SERUM SEPARATOR TUBE (SST/ GEL) OR PLAIN (RED TOP) VACUTAINER
Sample volume
AT LEAST 3 ML
Rejection criteria
LABELING ISSUE (UNLABELED/ MISLABELED); MISSING REQUEST FORM; MISMATCH BETWEEN REQUEST FORM & SAMPLE DETAILS; MISSING AGE/ GENDER; WRONG SAMPLE TYPE; INSUFFICIENT SAMPLE.
Other Instructions
THIS TEST IS NOT SYNONYMOUS WITH SERUM OSMOLARITY.
Reference intervals
APPROPRIATE VALUES PROVIDED WITH REPORT
Clinical Utility
EVALUATING PATIENTS WITH HYPONATREMIA OR SUSPECTED DIABETES INSIPIDUS, SIADH, WATER INTOXICATION, METHANOL INGESTION, ETHYLENE GLYCOL INGESTION ETC.
Test Limitations / Confounders
CORRELATION WITH SERUM ELECTROLYTE & URINE OSMOLALITY RESULTS MAY BE REQUIRED.