Table 1.

Krieg scale.

Score	1	2	3	4
Laryngoscopy	Easy	Good	Difficult	Impossible
Vocal cords	Open	Move	Closing	Closed
Coughing reflex	Absent	Diaphragm move	Weak	Strong

Evaluation of intubation conditions: 3-4: ideal; 5-6: good; 8–10: poor; 10–12: difficult.