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. 2021 Oct 14;11(10):391. doi: 10.3390/bios11100391

Figure 4.

Figure 4

Flowchart representing the different events during the effort test. The AeT and the AnT time are marked by blue arrows. The pink arrow corresponds to the maximum desaturation time after the AeT. The time to observe the first and the second SO2 drops are marked by the yellow arrows with the corresponding saturation values shown in the circles. The red arrows correspond to: T1 as the time to observe the first SO2 drop value before AeT, T2 as the time to reach the AeT from the first SO2 drop value, T3 as the time to observe the second SO2 drop value after the AeT, and T4 as the time from the second SO2 drop saturation to reach the AnT.