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Table 2 The effect of introducing an SOP * for pre-hospital controlled ventilation on the use of automated ventilators in patients with TBI **

From: Standard operating procedure changed pre-hospital critical care anaesthesiologists’ behaviour: a quality control study

Ventilator used Before SOP After SOP Total
Yes 14 17 31
No 18 3 21
Total 32 20 52
Prevalence 0.44 (0.26-0.62) 0.85 (0.62-0.97) 0.60
  1. *Standard operating procedure.
  2. **Traumatic brain injury.