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Table 2 Service Intervals of Events A and B

From: Could we employ the queueing theory to improve efficiency during future mass causality incidents?

  Event A Event B
Service Intervals (minutes) Triage category No. (%) Mean ± SD Min Max No. (%) Mean ± SD Min Max
Time form accident happened to ED admission time All 41(100) 48.07 ± 12.48 23 65 47 (100) 64.35 ± 41.00 18 153
Time form ED admission time to triage All 41(100) 3.76 ± 1.45 1 7 47 (100) 10.45 ± 10.12 1 42
Time form triage to ED physician evaluate patient Emergency 5 (12.2) 11 ± 4.64 7 17 36 (76.6) 13.75 ± 9.24 1 36
Urgency 36 (87.8) 12.86 ± 4.90 2 22 11 (23.4) 8.55 ± 4.59 4 18
Time of nurse execute the medical orders Emergency 5 (12.2) 82.6 ± 33.02 35 117 36 (76.6) 150.97 ± 111.61 8 470
Urgency 36 (87.8) 71.52 ± 30.48 28 144 11 (23.4) 88 ± 120.32 6 338
Time form X ray ordered to patient been sent to X ray room All 31(75.61) 1.45 ± 0.87 1 4 27 (57.45) 10.58 ± 10.44 1 35
Time for taking X ray All 31(75.61) 12.31 ± 5.73 2 22 27 (57.45) 12.23 ± 9.22 1 29
Time form CT scan ordered to patient been sent to T scan room All 9(21.95) 1.75 ± 1.16 1 4
Time for taking CT scan All 9(21.95) 20.33 ± 15.40 4 48
ED stay length from triage to discharge Triage 1 and 2 5 (12.2) 87.67 ± 33.84 59 125 36 (76.6) 147.05 ± 103.37 8 407
Triage 3 and 4 36 (87.8) 84.81 ± 36.83 16 158 11 (23.4) 79.67 ± 117.22 1 339
  1. *For MCI planning purposes: emergency was defined as triage level one and two, urgency defined as other triage levels