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Types of airway procedures among 1,738 trauma patients with an out-of-hospital airway attempt at 10 sites. Proportions for each site may add to over 100% due to the use of multiple different procedures on some patients. Total number of trauma airway patients (triangle symbol) is plotted on the secondary axis. Primary (left vertical) axis legend = proportion of airway procedures. Secondary (right vertical) axis legend = total number of trauma patients with an airway procedure.
