Time appears loss of pain sensation at all levels T12, T10, T6, T4 (minutes) Level Value Average (minutes) T12 (n = 99) SDX 2, 40 ± 0, 68 Min - Max 2 - 5 T10 (n = 99) SDX 3, 68 ± 1, 08 Min - Max 2 - 7 T6 (n = 99) SDX 5, 51 ± 1, 16 Min - Max 3 - 10 T4 (n = 37) SDX 7, 73 ± 1, 74 Min - Max 5 - 13 3.2.1.2.