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|Clinical Questions||Does my patient have anemia due to a nutritional deficiency?
Does my patient have hemochromatosis?
|Performed by||Parnassus & Mission Bay Chemistry|
|In House Availability||Test available 24 hours per day 7 days per week|
|Collection Instructions||Draw w/o hemolysis, which may artifactually increase the result. To avoid contamination, do not allow the specimen to come into contact with glass.|
|Container type||Gold top|
|Amount to Collect||2 mL blood|
|Preferred volume||1 mL serum|
|Min. Volume||0.8 mL serum|
1. Normal range for infants 0-1 year adapted from "Fundamentals of Clinical Chemistry" Tietz, 5th edition, 2001.
2. Normal range for children 1-18 years adopted from Soldin, Steven J, "Pediatric Reference Intervals", 6th edition, AACC Press, 2007, method 1.
3. Normal range for adults was determined by testing 271 male and female healthy blood donors at UCSF.
|Turn around times||Stat 1 hour, Routine 1 day|
|Additional information||To convert µg/dL to µmol/L (SI units) multiply by x 0.179
Gadolinium MR contrast agents including Gadodiamide (Omniscan), Gadoversetamide (Optimark), Gadopentetate Dimeglumine (Magnevist), and Gadoterdiol (Prohance), have been shown to interfere with certain colorimetric assays used in the measurement of various serum cations including iron, magnesium, and calcium.
The UCSF clinical labs utilize a colorimetric assay for the measurement of both serum iron and serum magnesium that are subject to this interference. For serum iron, gadolinium containing agents (Gadodiamide, Gadoversetamide, and Gadopentetate) may produce a falsely low result (on average, 75, 78, and 88% respectively, of the actual iron concentration).
See "Calcium" and "Magnesium" entries for respective interferences.
Reference:Proctor et al. Gadolinium Magnetic Resonance contrast Agents produce Analytic Interference in Multiple Serum Assays. Am J Clin Pathol. 2004;121:282-292.
See also Iron, Transferrin and Saturation of Iron-Binding Capacity
|Last Updated||1/28/2015 2:46:39 PM|
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