From: Clinical analysis of tracheobronchial foreign body aspiration in children: a focus on external and intrinsic factors
Prehospital time(h)
With history
Without history
Count
< 24
52
67.5
20
41.7
72
57.6
24–72
26.0
16
33.3
36
28.8
≥ 72
5
6.5
12
25.0
17
13.6
77
100
48
125