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Predictors of difficult intubation | Predictors of difficult backup plans for oxygenation |
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Predictors of difficult direct laryngoscopy | Predictors of difficult facemask ventilation |
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History of difficult intubation | + | History of neck radiation | + |
Limited mouth opening (interincisor gap) | + | History of snoring or obstructive sleep apnea | + |
Modified Mallampati Score 3 + 4 | + | Obesity | |
Limited cervical spine mobility | + | Older age | + |
Upper lip bite test | + | Male sex | + |
Limited mandibular protrusion | + | Full beard | |
Retrognathia | + | Lack of teeth | + |
Short thyromental distance | + | Modified Mallampati Score 3 + 4 | + |
| | Limited mandibular protrusion | + |
| | Short thyromental distance | + |
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Predictors of difficult video laryngoscopy | Predictors of difficult supraglottic device use |
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Neck pathology (e.g., scars, neck radiation, mass, thick neck) | + | Glottic, supraglottic or subglottic pathology (e.g., neck radiation) | + |
Cormack-Lehane Grade 3 + 4 with Macintosh | + | Obesity | |
Limited cervical spine mobility | + | Older age | + |
Limited mandibular protrusion | + | Male sex | + |
Short thyromental distance | + | Poor dentition | + |
| | Limited mouth opening | + |
| | Limited cervical spine mobility | + |
| | Short thyromental distance | + |
| | Rotation of surgical table during case | |
| | Applied cricoid pressure | |
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Predictors of difficult ligthwand use | Predictors of difficult cricothyrotomy |
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Obesity (thick neck) | | Neck surface pathology (e.g. scars, radiation, inflammation, hematoma) | + |
Limited cervical spine mobility | + | Deviated airway (e.g. goiter, neoplasms) | |
Large tongue/epiglottis | + | Obesity (thick neck) | |
| | Age <8–10 years | |
| | Female sex | |
| | Limited cervical spine mobility | + |
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