TA results Characteristics Frequency (n=92) Percentage% Successful TA 68 73, 9 Unsuccessful TA 24 26, 1 Reason of unsuccessful TA Fail of suction Catheter cannot pass Successful suction but the flow remain unchanged 13 10 1 14, 1 10, 9 1, 1 Post-suction complications 0 0, 0 Figure 3.1.