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Table 3 Level of evidence for overall success for devices under study

From: A systematic review of the role of videolaryngoscopy in successful orotracheal intubation

  Good evidence Weak evidence No evidence
(Level 1+) (Level 3)
Subjects at higher risk of difficulty during DL Airtraq Bonfils McGrath
CTrach Bullard
GlideScope
Pentax AWS
V-MAC
Known difficult DL   Airtraq McGrath
Bonfils V-MAC
Bullard
CTrach
GlideScope
Pentax AWS
Failed DL   Airtraq Bullard
Bonfils V-MAC
CTrach
GlideScope
McGrath
Pentax AWS
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