Comparison of the resonance sonorheometry based Quantra® system with rotational thromboelastometry ROTEM® sigma in cardiac surgery – a prospective observational study

Table 4 Comparison clotting times of the Quantra and the ROTEM

Parameter	Median [IQR] sample 1	Outside Reference Range x/n	Median [IQR] sample 2	Outside Reference Range x/n	Reference Range
CT	142 [132; 154] sec	3/38	153 [137; 166] sec	11/35	113–164 s
CTH	134 [126; 146] sec	3/38	139 [131;157] sec	14/35	109–150 s
INTEM-CT	172 [161; 183] sec	16/38	232 [232; 305] sec	35/35	138–174 s
HEPTEM-CT	168 [160; 181] sec	15/38	267 [232; 301] sec	34/35	45–173 s

Abbreviations: CT Coagulation time of the intrinsic coagulation pathway of the Quantra in seconds, CTH, Clot time in the presence of heparinase 1 of the Quantra in seconds, INTEM-CT Clot time of the ROTEM in seconds (time from start the test until a clot firmness of 2 mm is detected), HEPTEM-CT Clot time of INTEM added with heparinase 1 of the ROTEM in seconds

ISSN: 1471-2253