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New recommendations for thromboelastography reference ranges for pregnant women
Ferdinand Polak1, Ivana Kolnikova, Michal Lips
1Department of Anesthesiology and Intensive Care, First Faculty of Medicine, Charles University in Prague, and General University Hospital, Prague, Czech Republic. ferdinand.polak@vfn.cz
Thrombosis Research
|May 6, 2011
Summary
Thromboelastography (TE) reveals distinct coagulation patterns in pregnant women. New reference ranges for TE parameters in third-trimester pregnancies are proposed to improve clinical accuracy.
Area of Science:
- Reproductive Medicine
- Hematology
- Clinical Coagulation
Background:
- Standard thromboelastography (TE) reference ranges may not accurately reflect the unique hemostatic changes during pregnancy.
- Understanding these differences is crucial for appropriate clinical management of pregnant individuals.
Purpose of the Study:
- To compare thromboelastography (TE) coagulation parameters between healthy pregnant women in their third trimester and non-pregnant women.
- To establish new, trimester-specific reference ranges for TE in pregnancy.
Main Methods:
- A prospective observational study compared TE parameters in 60 pregnant women (group GRAV) and 43 non-pregnant women (group NON-GRAV).
- Selective percentiles were utilized to define new reference limits for TE variables.
Main Results:
- Significant differences were observed in TE parameters including reaction time (r), kinetic time (k), alpha angle, maximum amplitude, coagulation index, and LY60 between the groups.
- New reference limits were established for pregnant women: r time (2-8 min), k time (1-3 min), alpha angle (60-77°), maximum amplitude (64-76 mm), LY60 (0-3%), and coagulation index (0-5).
Conclusions:
- Existing thromboelastography (TE) reference ranges are not suitable for pregnant women.
- New reference limits for TE are proposed for third-trimester pregnancies to enhance diagnostic precision.
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