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.