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Table 3 Patients workload change in emergency department

From: Rethinking preparedness planning in disaster emergency care: lessons from a beyond-surge-capacity event

Workload MM
Extreme
TH
High
SH
Low
WH
Moderate
a. 1st burn patient arrival time 21:07 22:04 22:17 23:35
b. Number of ED patients before the FFCDE patients’ arrival 43 17 27 26
c. Cumulative maximum number of patients or turning point of patient decline 88 35 35 37
d. Time in point c 23:15 23:30 00:15 00:35
e. Number of 15-min intervals in the ascent period (e = (d-a)/15) 9 6 6 4
f. Time in resuming regular ED work 02:00 02:00 01:10 01:35
g. Total FFCDE and non-FFCDE patients in point f 28 19 22 28
h. Number of 15-min intervals during the ED resuming period (h = (f-d)/15) 11 10 4 4
Overload time (hour): workload above regular ED capacity (blue line) 21:07–02:00 (5)+ 22:20 -01:20
(3)
0:10 – 0:30
(0.5)
0:20 – 1:50
(1.5)
Load accumulated index(LAI) (c-b)/e 5 3 1.33 2.75
Load relief index(LRI) (c-g)/h 5.45 1.6 3.25 2.25
  1. + MM hospital had already exceeded its regular ED capacity when the mass casualty incident occurred. We used the arrival time of the first FFCDE patient as the beginning overload point