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Clot waveform analysis in hemophilia carriers
Eya Drissi1, Fatma Ben Lakhal, Ons Ghali
1Biological Hematology Department, Aziza Othmana Hospital, Tunis, Tunisia.
Summary
Activated partial thromboplastin time clot waveform analysis (APTT-CWA) shows promise for identifying hemophilia carriers and assessing bleeding tendencies. This method effectively differentiates carriers from controls and correlates with bleeding symptoms.
Area of Science:
- Hematology
- Coagulation Science
Background:
- Activated partial thromboplastin time clot waveform analysis (APTT-CWA) is gaining attention for its ability to reflect clot formation dynamics.
- Previous research primarily focused on APTT-CWA in hemophilia and disseminated intravascular coagulation.
Purpose of the Study:
- To investigate the utility of APTT-CWA in identifying hemophilia carriers.
- To assess the correlation between APTT-CWA parameters and bleeding tendencies in carriers.
Main Methods:
- Cross-sectional study comparing 32 hemophilia carriers with 30 healthy women.
- Evaluated bleeding using the ISTH-BAT, alongside APTT, APTT-CWA, and factor VIII/IX:C levels.
- Utilized ROC analysis to determine diagnostic accuracy of APTT-CWA parameters.
Main Results:
- APTT was prolonged in 14 carriers. APTT-CWA parameters (Tmax 1, Tmax 2, Max 1, Max 2) differed significantly between carriers and controls.
- APTT-CWA cut-offs demonstrated good sensitivity and specificity for carrier detection.
- Significant differences in APTT-CWA parameters were observed between bleeding and non-bleeding carriers. FVIII:C correlated positively with Max 2 and negatively with Tmax 1, Tmax 2, and Min 2.
Conclusions:
- APTT-CWA appears to be a valuable tool for evaluating bleeding risk and detecting coagulation factor deficiencies.
- Further research is recommended to fully establish APTT-CWA's role in identifying hemophilia carriers.
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