From: Comparison of videolaryngoscopy and direct laryngoscopy by German paramedics during out-of-hospital cardiopulmonary resuscitation; an observational prospective study
CL-Grade
I
II
III
IV
Total no. ETI successful
17 (89,5%)
37 (88,1%)
12 (52,2%)
2 (15,4%)
Total no. ETI unsuccessful
2 (10,5%)
5 (11,9%)
11 (47,8%)
11 (84,6%)