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Thromboelastographic changes in healthy parturients and postpartum women
S K Sharma1, J Philip, J Wiley
1University of Texas Southwestern Medical School, Department of Anesthesiology and Pain Management, Dallas 75235-9068, USA.
Anesthesia and Analgesia
|July 1, 1997
Summary
Thromboelastography (TEG) reveals pregnancy induces a hypercoagulable state. Postpartum women also show hypercoagulability within 24 hours after delivery, indicating altered blood clotting dynamics.
Area of Science:
- Hematology
- Obstetrics
- Physiology
Background:
- Pregnancy significantly alters hemostasis, but the extent of hypercoagulability requires precise quantification.
- Understanding coagulation changes during pregnancy and postpartum is crucial for managing obstetric complications.
Purpose of the Study:
- To investigate coagulation status in pregnant and postpartum women using Thromboelastography (TEG).
- To compare TEG parameters between pregnant, postpartum, and nonpregnant women.
- To assess the effect of celite activation on TEG analysis speed.
Main Methods:
- Thromboelastography (TEG) was performed on native and celite-activated whole blood samples.
- Participants included nonpregnant volunteers, healthy term pregnant women, and postpartum women.
- Key TEG parameters (r, K, MA, alpha angle, coagulation index) were analyzed.
Main Results:
- Pregnant and postpartum women exhibited significantly decreased r and K parameters compared to nonpregnant women.
- Increased maximum amplitude (MA), elastic shear modulus, and alpha angles were observed in pregnant and postpartum groups.
- The TEG coagulation index was significantly higher in pregnant and postpartum women, indicating a hypercoagulable state.
Conclusions:
- Thromboelastography confirms pregnancy as a hypercoagulable state.
- Postpartum women remain hypercoagulable for at least 24 hours after delivery.
- Celite activation accelerates TEG analysis, offering a faster diagnostic approach.