The T1/Tc ratio displays the relationship between the first twitch and the control twitch, enabling clinicians to assess block depth by tracking the decline in T1 amplitude. This provides a quantifiable indicator of when the vocal cords are fully relaxed and adequately abducted for intubation.
Unlike TOF fade—which can vary widely between patients—T1 suppression is a more direct, consistent, and reliable parameter for identifying optimal intubating conditions.