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Test Code LAB5293 Phosphorus - 24 Hour Urine

Performing Laboratory

Asante Rogue Regional Medical Center / Asante Three Rivers Medical Center

Specimen Minimum Volume

1.0 mL of a well mixed 24 hour specimen

Billing Code

2051019

Methodology

Phosphomolybdate

Specimen Requirements

24 hour urine, 24 hour urine container with no preservative

24 Hour Urine Container Instructions

24 Hour Urine Container with no preservatives

 

Container MUST be labeled with: Office Location, Patient’s First and Last Name and Date of Birth

 

Instruct patient:

  • To label container with Date and time collection started, Date and time collection finished. 
  • Void and DISCARD the first-morning specimen and to record exact time of voiding.
  • Patient should collect all subsequent voided urine for remainder of day and night.
  • Collect first-morning specimen on day 2 at same time as noted on day 1.
  • Collection is complete.
  • Keep urine refrigerated during entire collection. Screw lid on securely.

Day(s) Test Set Up

Monday through Sunday

Test Classification and CPT Coding

84105  -  Phosphorus inorganic (phosphate); urine

Additional Information

Evaluate calcium/phosphorus balance.  High urinary phosphorus, i.e., increased renal losses, occurs in primary hyperparathyroidism, vitamin D deficiency, renal tubular acidosis, diuretic use.  Phosphates are among the substances which may be lost in the Fanconi syndrome.  Renal loss of phosphate may itself lead to rickets or osteomalacia.  Low urinary phosphorus in hypoparathyroidism, pseudohypoparathyroidism, vitamin D intoxication.  Evaluate nephrolithiasis.  Hypophosphatemia with normal serum calcium, high alkaline phosphatase, hypercalciuria, low urinary phosphorus occur with osteomalacia from excessive antacid ingestion.

Specimen Transport Temperature and Stability

Refrigerate: 2°- 8° C

Transport promptly to laboratory

Assay should be performed within 2 hours of completion

Performing Department

Chemistry

Reasons for Rejection

Lacking collection date

Lacking collection beginning and ending times

Lack of Two Patient Identifiers:

         1-Patient's First & Last name 

         2-Patient's Date of Birth