Table 5
Airway management technique of 187 cases of difficult intubation by simplified risk score

Airway management technique	Simplified risk score*				Total
	1	2	3	4 or 5
	Direct laryngoscope
Macintosh blade	12	66	3	1	82
McCoy blade	4	27	6	2	39
Video laryngoscope assisted
Pentax AWS	6	10	3	0	19
McGrath AMC	0	9	6	0	15
Fiberoptic intubation	4	10	5	3	22
Lightwand	0	2	1	0	3
Laryngeal mask airway	1	3	1	0	5
Failed intubation
Tracheostomy	0	1	0	0	1
Cancel operation	0	0	1	0	1
Total	27	128	26	6	187

^*Number of risk factor: presence of upper front teeth, history of difficult intubation, Mallampati>1, Mallampati of 4, mouth opening<4 cm