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Can causes of false-normal D-dimer test [SimpliRED] results be identified?
R A Kraaijenhagen1, J Wallis, M M W Koopman
1Department of Vascular Medicine, Academic Medical Center, University of Amsterdam, Meibergdreef 9, Amsterdam, The Netherlands. r.a.kraaijenhagen@amc.uva.nl
Thrombosis Research
|December 18, 2003
Summary
Certain patient characteristics are linked to false-normal D-dimer test results in venous thromboembolism diagnosis. However, these characteristics have limited clinical utility in identifying patients who may be incorrectly cleared.
Area of Science:
- Medical Diagnostics
- Hematology
- Clinical Pathology
Background:
- D-dimer testing is used to diagnose venous thromboembolism (VTE).
- Identifying false-normal D-dimer results is crucial to avoid undertreatment.
- Understanding factors causing false-normal results is necessary for diagnostic safety.
Purpose of the Study:
- To investigate patient characteristics associated with false-normal D-dimer results.
- To assess the risk of false-normal D-dimer results in VTE diagnosis.
Main Methods:
- Retrospective study of patients with confirmed VTE and false-normal SimpliRED D-dimer.
- Comparison of baseline characteristics between patients with false-normal and abnormal D-dimer results.
- Statistical analysis of clinical factors and their association with false-normal D-dimer.
Main Results:
- The SimpliRED test showed an overall sensitivity of 94% for VTE.
- Certain clinical characteristics, like heparin treatment and prolonged symptoms, were more prevalent in false-normal D-dimer cases.
- However, these characteristics also appeared in patients with abnormal D-dimer results, limiting their predictive value.
Conclusions:
- A link exists between specific clinical factors and false-normal SimpliRED D-dimer results.
- The clinical utility of these identified characteristics for predicting false-normal D-dimer results is limited.