Thrombelastography during and after elective abdominal surgery.

Area of Science:

• Coagulation science
• Surgical hemostasis
• Clinical pathology

Background:

• Thrombelastography (TEG) is a viscoelastic assay evaluating blood coagulation.
• Elective abdominal surgery can impact hemostasis.
• Understanding perioperative coagulation changes is crucial for patient management.

Purpose of the Study:

• To characterize changes in thrombelastographic indices (r, k, mA) during and after elective abdominal surgery.
• To correlate these changes with specific coagulation factors.

Main Methods:

• Thrombelastography was performed on recalcified whole blood samples.
• Samples were collected from 50 patients before, during, and after surgery.
• Coagulation indices (r, k, mA) and factor VIII activity were analyzed.

Main Results:

• During surgery, r and k times shortened, with no significant change in mA.
• Shortened r and k times correlated partly with increased factor VIII activity.
• Post-surgery, r time slightly shortened, while k and mA showed marked changes.
• Increased fibrinogen concentration was the primary driver of post-operative thrombelastographic alterations.

Conclusions:

• Perioperative changes in thrombelastography reflect dynamic alterations in hemostasis.
• Factor VIII activity influences intraoperative clotting dynamics.
• Fibrinogen levels are key determinants of postoperative coagulation status following abdominal surgery.