Preanalytic Variables in Special Coagulation Testing
Clinical Implications
Clotted Specimen: Definition of Clotted Specimen
October 2008
A question commonly asked is “How large does the clot need to be in order for such artifactual results to occur?” There are no validation studies looking at the size of a clot within a tube and its affect on clotting factor assays. So for practical purposes a clot found within a specimen tube should be considered as a clotted specimen.
Definition of Clotted Specimen |
Jump to section:
- Introduction
- Variables Affecting Test Results
- Preanalytic Variables Affecting Coagulation Testing
- Special Coagulation Test Algorithms
- Case History
- Preprocedure Coagulation Tests
- PT and aPTT Diagram
- Normal Hematocrit and High Hematocrit
- Preprocedure Coagulation Tests
- Case Conclusion
- Case Example
- Repeat Testing With Fresh Sample
- Intrinsic and Extrinsic Diagram
- Clotted Specimen: Definition of Clotted Specimen
- Significance of Clotted Specimen
- Significance of Clotted Specimen
- Preanalytic Factors Affecting Testing Results: Clotted Specimen
- Scope of the Problem
- Event Capture Tool
- Clotted Specimens as a Percentage of Test Volume
- Clotted Specimens 2007
- Clinical Laboratory Standards Institute
- Rejection of Specimen: Impact
- Causes of Clotted Specimen
- Steps Towards Reducing Clotted Specimens
- Conclusion
- Questions?
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