ARUP's Laboratory Test Directory

0081145: Urine Supersaturation Profile

Test Mnemonic: URINE SAT
Methodology: pH Meter/Spectrophotometry/Ion-Selective Electrode/Enzymatic

Performed: Wed, Fri

Reported: 1-8 days

Specimen Required:  
Collect: 24-hour urine. Refrigerate specimen during collection.

Transport: Four 4 mL aliquots from a 24-hour urine, frozen. (Min: 12 mL, 3 mL aliquots) Submit specimens in ARUP Standard Transport Tubes.
1st aliquot: No adjustment to pH.  Record total 24-hour volume, collection time interval, and "No Adjustment to pH" on transport tube and test request form.
2nd aliquot: No adjustment to pH.  Record total 24-hour volume, collection time interval, and "No Adjustment to pH" on transport tube and test request form.
3rd aliquot: Adjust remaining 24-hour collection to a pH of 1.5-2.0 by adding 6M HCI (approximately 10mL HCI/24-hour specimen based on normal adult output of 1000-2000 mL/24 hours).  Mix well.  Record total 24-hour volume, collection time interval, and pH on transport tube and test request form.
4th aliquot: After 3rd aliquot has been removed, adjust remaining 24-hour collection to a pH greater than 8 by adding 6M NaOH (approximately 20 mL 6M NaOH/24-hour specimen based on normal adult output of 1000-2000 mL/24 hours).  Mix well and allow entire 24-hour collection to stand for 15 minutes.  Record total 24-hour volume, collection time interval, and pH on transport tube and test request form.

Pediatric Collection/Transport: Four 3 mL aliquots from a 24-hour urine, frozen.  Submit same as above.

Remarks: Patient must collect urine for a full 24-hour period. Record total volume and collection time on test request form.

Unacceptable Conditions: Time collection other than 24 hours.  Random collection

Stability: Ambient: Unacceptable; Refrigerated: 1 day; Frozen: 2 weeks

Reference Interval:
 
Test Number Components Reference Interval
 Urine Supersaturation, pH 5.0-7.5
 Calcium, Urine Calcium-free diet: 5-40 mg/d
Low calcium diet (800 mg/d or less): 50-150 mg/d
Average calcium diet (about 800 mg/d): 100-250 mg/d
High calcium diet (800 mg/d or greater): > 250 mg/d
 Magnesium, Urine - mg/d 12-199 mg/d
 Sodium, Urine51-286 mmol/d
0081102Sulfate, Urine 6-30 mmol/d
 Citric Acid, Urine 18 years and older: 320-1240 mg/d
 Oxalate, Urine0-12 years: 13-38 mg/d
Male 13 years and older: 7-44 mg/d
Female 13 years and older: 4-31 mg/d
 Uric Acid, UrineBy report (reports may vary based on instrumentation)
 Potassium, Urine 25-125 mmol/d
 Creatinine (24-hour)  
 
Male Female
3-8 years: 140-700 mg/d
9-12 years: 300-1300 mg/d
13-17 years: 500-2300 mg/d
18-50 years: 1000-2500 mg/d
51-80 years: 800-2100 mg/d
81 years and older: 600-2000 mg/d 		3-8 years: 140-700 mg/d
9-12 years: 300-1300 mg/d
13-17 years: 400-1600 mg/d
18-50 years: 700-1600 mg/d
51-80 years: 500-1400 mg/d
81 years and older: 400-1300 mg/d
 Chloride, Urine 140-250 mmol/d
0020478Phosphorus, Urine  
 
Test Number Components Reference Interval
 Phosphorus, Urine - mg/dL Refer to test 0020213
 Phosphorus/Creatinine Ratio, Urine Refer to test 0020583

Interpretive Data:
Refer to report.



CPT Code(s):
82340 Calcium; 82436 Chloride; 82507 Citrate; 82570 Creatinine; 84560 Uric; 83735 Magnesium; 83945 Oxalate; 84105 Phosphate; 84133 Potassium; 84300 Sodium; 84392 Sulfate; and 83986 pH.

 

 

 
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