Category
ROUTINE CHEMISTRY
Sub Category
ELECTROLYTES
Synonym/Aliases
PHOSPHORUS, SPOT URINE
Abbreviations
-N/A
Type
INDIVIDUAL TEST
Results
RESULTS READY WITHIN 3 WORKING DAYS
Method
SPECTROPHOTOMETRIC
Temp
SAMPLE KEPT AT ROOM TEMPERATURE 2-3 HOURS; 2-8ºC 1 DAY; FROZEN 7 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
SPOT URINE
Container/ preservative
SERUM SEPARATOR TUBE (SST/ GEL) OR PLAIN (RED TOP) VACUTAINER
Sample volume
AT LEAST 5 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
- N/A
Reference intervals
NO ESTABLISHED REFERENCE VALUES FOR RANDOM URINE SAMPLES. IT MAY BE INTERPRETED IN CONJUNCTION WITH SERUM PHOSPHORUS, USING BOTH VALUES TO CALCULATE FRACTIONAL EXCRETION OF CHLORIDE.
THE CALCULATION FOR FRACTIONAL EXCRETION (FE) OF PHOSPHORUS IS
FE(P)= ([P(URINE) X CREAT(SERUM)]/[P(SERUM) X CREAT(URINE)])X100
Clinical Utility
EVALUATION OF HYPOPHOSPHATEMIA, HYPERPHOSPHATEMIA OR NEPHROLITHIASIS
Test Limitations / Confounders
- N/A