Laboratory Test Information Guide

Details for Iron,Plasma

Test Name: Iron,Plasma
Alternate Name(s):  
Laboratory: Core UH & VH
Specimen Type: 4.5 mL Green top Vacutainer
0-2 years: 0.6 mL Green Microtainer
2-10 years: 3 mL Green top tube
Collection Information: Collect blood aseptically in a Vacutainer tube.
Test Schedule: As required
Turnaround time from when specimen
is received in testing laboratory:
4 hours
1 hour
Reference Range: 
8-29 µmol/L
7-26 µmol/L
Effective Date: 2008-11-15
Revised Date: 2015-10-16
Critical Value:  
Interpretive Comments: Useful in confirming the diagnosis of iron-deficiency anemia or hemochromatosis.

Assessment of patients with acute iron poisoning. Serum ferritin is the preferred method for assessing iron stores.

The concentration of iron in serum/plasma is dependent on the diet and is subject to circadian variations. Values are higher in A.M.
Increased levels found with liver damage, hemoylytic anemia, pernicous anemia, hemochromatosis and transfusion siderosis.

Decreased levels found in iron deficiency, malabsorption, and after blood loss.

Toxicity possible in children consuming large amounts of vitamins containing iron.

In patients treated with iron supplements or metal-binding
drugs, the drug-bound iron may not properly react in the test,
resulting in falsely low values.

In the presence of high ferritin concentrations > 1200 μg/L the
assumption that serum iron is almost completely bound to
transferrin is not valid anymore. Therefore, such iron results
should not be used to calculate Total Iron Binding Capacity
(TIBC) or percent transferrin saturation (% SAT).

In very rare cases, gammopathy, in particular type IgM
(Waldenströms macroglobulinemia, may cause inreliable results
Special Processing:  
Comments: Plasma samples containing RBC hemolysate may have slightly increased iron values.
Method of Analysis: Colorimetric
Critical Information Required:  
Storage & Shipment:  
System Codes: 
Referred To:  

Questions? Comments? Contact Laura Gopaul