Comparison of venous sampling methods for thromboelastography in clinically normal dogs

Area of Science:

• Veterinary Medicine
• Hemostasis and Thrombosis
• Diagnostic Laboratory Science

Background:

• Thromboelastography (TEG) is a valuable tool for assessing hemostasis.
• Standardized blood collection methods are crucial for reliable TEG results.
• Variations in collection techniques may influence TEG parameters.

Purpose of the Study:

• To investigate the impact of different blood collection sites (jugular vs. saphenous vein) and methods (syringe aspiration vs. evacuated tube vs. central venous catheter) on TEG results in healthy dogs.

Main Methods:

• Blood samples were collected from 8 healthy dogs via the jugular and saphenous veins using various methods.
• Kaolin-activated TEG analyses were performed to measure reaction time (R), clot formation time (K), alpha angle, maximal amplitude, and global clot strength (G).

Main Results:

• No significant differences in TEG parameters were found based on sampling site.
• Syringe aspiration from the jugular vein resulted in lower R and K values and a higher alpha angle compared to evacuated tube collection from the jugular vein.
• Significant differences were observed between specific jugular and saphenous vein collection methods.

Conclusions:

• Blood collection method, particularly from the jugular vein, can cause small but significant variations in TEG values.
• Standardized blood collection techniques are essential for reproducible research findings.
• All tested sampling methods were deemed acceptable for single clinical diagnostic use.