Table 2.

Commercially available TEG^® assays.

TEG® Test	Activator	Rationale
Native TEG	None	Assessment of native blood coagulation
Kaolin TEG	Kaolin	Test of intrinsic pathway (Kaolin-mediated activation of factor XII). Faster results than the native test
Kaolin TEG	Kaolin and tissue factor	Test of both intrinsic and extrinsic pathways (Tissue factor-dependent activation of factor VII). Rapid assessment of blood coagulation
Kaolin TEG with heparinase	Kaolin and heparinase	Heparinase inactivates heparin. Assessment of heparin reversal on blood coagulation
TEG Functional Fibrinogen	Tissue factor and abciximab	Abciximab acts as a platelet GpIIb/IIIa inhibitor. Test of extrinsic pathway allowing for the quantification of fibrinogen contribution to clot strength after platelet inhibition