Our September 2025 Quick Question asked, “What viscoelastometry device is employed at your facility?” A modest group of thirteen participants answered…
- TEG 6s: 4 (31%)
- TEG 5000: 2 (15%)
- ROTEM: 5 (39%)
- Sonoclot: 0
- Hemosonics Quantra: 2 (15%)
The TEG 5000 was developed in 1948, and the Sonoclot in 1975; both represent the pioneering phase of viscoelastometry (VET), then termed thromboelastography (TEG). Both are available worldwide, although the Sonoclot is primarily used in the Far East. The TEG 5000 was a mainstay from the 1960s to 2020. The ROTEM was FDA-approved in 2022 and introduced the synonym “thromboelastometry (TEM).” All used mechanical means to trigger and measure clot formation, and are subject to interference by vibration. The TEG 6s received its initial FDA clearance in 2017, and the Quantra was FDA-approved in 2024; both are stable and use ultrasound to measure clot formation. All VET methods produce clotting patterns that measure the speed and intensity of clot formation and the level of fibrinolysis. VET is employed primarily in the operating room or the emergency department. Click Hemostasis in the OR for a detailed description of all VET instrumentation and applications.
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