Depth of block | Posttetanic count (PTC) | Train-of-four count (TOFC) | Subjective train-of-four (TOF) ratio | Measured (actual) train-of-four (TOF) ratio |
Intense (profound) block | 0 | 0 | 0 | 0 |
Deep block | ≥1 | 0 | 0 | 0 |
Moderate block | NA | 1 to 3 | 0 | 0 |
Light (shallow) block | NA | 4 | Fade present | 0.1 to 0.4 |
Minimal block | NA | 4 | No fade | >0.4 but <0.9 |
Full recovery | NA | 4 | No fade | ≥0.9 to 1.0 |
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