Test Code Hemogram Hemogram
Additional Codes
Cerner |
NextGen |
Hemogram |
Hemogram |
Methodology
Sysmex XN: The analyzer performs hematology analysis according to the hydrodynamic focusing (DC Detection), flow cytometry method (semiconductor laser), and SLS-hemoglobin methods.
Patient Preparation
None
Collection Instructions
Do not place samples on a mechanical rocker.
Specimen Requirements
Preferred Volume |
12 x 75 mm tube EDTA-2K or EDTA-3K Lavender filled to capacity |
Minimum Volume |
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Container |
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Stability |
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Rejection Criteria |
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Result Reporting and Reference Values
Reported Parameters |
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Reference Ranges |
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Critical Ranges |
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Reflex Testing
- A fluorescent platelet may be performed when:
- Red cell fragments, microcytic RBC's or white cell cytoplasmic fragments may interfere with automated platelet counts.
- If >10 megakaryocytes/100 WBC are seen on Slide examination
- Slide examination occurs when:
- Instrument parameter flags indicate abnormal cell populations, requiring a technologist to review slides to verify cell identity and abnormal morphology.
- WBC count of <2,000/µL or >25,000/µL
- RBC count <2.5 x 106 cells/µL or >7.5 x 106 cells/µL
- HGB <7gm/dL or > 18 gm/dL for 12Years -150Years; >24gm/dL for 0-15 days; and >21 gm/dL for 15Days -30Days
- MCV <70 fL or > 108 fL for 60 Days -150 Years; >131 fL for 0D-30Days; and >110 fL for 30D-60Days
- MCHC >37.5%
- RDW-CV >20%
- PLT <50,000/ µL or >700,000/ µL
- Abnormal red blood cell quantitations.
- Abnormal Heme Smear Path Review will be performed for:
- Unexplained Hgb <7 gm/dL if accompanied by abnormal RBC morphology or low or high MCV.
- Any bizarre cells
- MCV > 110 fL
- MCH < 2 pcg or > 37 pcg
- MCHC >37 gm/dL
- RDW >22%
- PLT <50,000/ µL or > 1,000,000/ µL (first time only).
Limitations
- Delta check: Hgb change of > 2 gm/dL without explanation requires a rerun or redrawn specimen.
- Red cell fragments, microcytic RBC's or white cell cytoplasmic fragments may interfere with automated platelet counts. A fluorescent platelet may be performed to avoid this interference.
- WBC's greater than 100,000/µL may cause turbidity and falsely increase the hemoglobin, RBC and HCT values.
- Giant platelets and clumped platelets may falsely elevate the WBC count and falsely decrease the platelet count.
- Abnormal paraproteins found in blood from patients with Multiple Myeloma can falsely increase the HGB.
- Severely icteric samples may falsely elevate the HGB value and related indices
- Megakaryocytes may falsely increase WBC counts on automated hematology analyzers.
Useful For
Examination of the numerical and/or morphological findings of the complete blood count by the physician are useful in the diagnosis of disease states such as anemias, leukemias, allergic reactions, viral, bacterial, and parasitic infections.