LEAD, URINE, QUANTITATIVE

Test Documentation
Specimen Required
Patient Preparation: Patients should be encouraged to discontinue vitamins, nutritional supplements and nonessential over-the-counter medications prior to specimen collection. High concentrations of iodine may interfere with elemental testing. Abstinence from iodine-containing medications or contrast agents is recommended at least 1 month before sample collection.
Collect 24 hour urine, refrigerate during collection. Mix well and send 8.0 mL urine (1.0 mL minimum) refrigerated in an IATA-approved metal-free screw-capped plastic urine container. Please contact laboratory for metal-free screw-capped plastic vials. Specimens in other containers will be rejected. Record total volume on test requisition and specimen label.
A completed lead requisition must accompany sample.

Alternate Specimen
Random Urine

Rejection Criteria
Urine collected within 48 hours after gadolinium administration.

Methodology
Quantitative Inductively Coupled Plasma/Mass Spectrometry

Stability
Room Temperature: 7 days; Refrigerated (preferred): 14 days; Frozen: 1 year

Reference Range
Lead, Urine:   0-23 mcg/L  
Lead, Urine (24 hour):   0-31 mcg/d  
Lead per gram of creatinine:   Less than 5 µg/g CRT  
Creatinine (24 hour):
Male:   Female:  
3-8 yrs: 140-700 mg/d   3-8 yrs: 140-700 mg/d  
9-12 yrs: 300-1300 mg/d   9-12 yrs: 300-1300 mg/d  
13-17 yrs: 500-2300 mg/d   13-17 yrs: 400-1600 mg/d  
18-50 yrs: 1000-2500   18-50 yrs: 700-1600 mg/d  
51-80 yrs: 800-2100 mg/d   51-80 yrs: 500-1400 mg/d  
81 yrs & older: 600-2000 mg/d   81 yrs & older: 400-1300 mg/d  

Performed
Monday-Saturday

Turnaround Time3-5 days
Test CodeUPBA
CPT-4 Code (s)
83655
LOINC Codes
Lead, Urine   5676-2  
Lead, Urine (24 hour)   5677-0  
Creatinine (24 hour)   2162-6  
Creatinine urine/volume   2161-8  
Total volume   19153-6  
Hours collected   30211-7  
Lead, Urine - Ratio to CRT   13466-8  

Warde
Medical
Laboratory