Table 2.
Median ACT values measured by the ACT Plus and i-STAT.
| N | ACT Plus (s) | i-STAT (s) | p-Value | |
|---|---|---|---|---|
| Baseline | 97 | 137 (129–144) | 126 (120–137) | <.001 |
| Heparinization | 94 | 482 (433–583) | 472 (428–567) | .392 |
| CPB 1 | 100 | 628 (543–720) | 439 (375–522) | <.001 |
| CPB 2 | 99 | 570 (495–668) | 373 (328–422) | <.001 |
| CPB 3 | 92 | 536 (457–605) | 351 (324–401) | <.001 |
| CPB 4 | 51 | 507 (452–560) | 346 (318–390) | <.001 |
| Protamine | 99 | 146 (138–159) | 126 (120–131) | <.001 |
ACT, activated clotting time; CPB 1, after initiation of bypass; CPB 2, 30 minutes on CPB; CPB 3, 60 minutes on CPB; CPB 4, 90 minutes on CPB. Total number of split-sample measurements: 708.