Predictor difficult intubation

Basic, Generic Clinical Sciences

1.    Mallampati Evaluation:

2.    Thyromental Distance:

3. Upper lip bite test :

  • Class 1= lower incisors can bite upper lip above vermilion line
  • Class 2= lower incisors can bite upper lip below vermilion line
  • Class 3= lower incisors cannot bite upper lip

This evaluation has been found to be fairly specific without great sensitivity. Investigators determined its utility lies in predicting likely easy intubations rather than those that may be difficult. (7)


    Anesth Analg;2006 Nov;103(5):1256-9

    [PubMed: 17056964]

    Can J Anaesth. 2005 Mar;52(3):231-5

    [PubMed: 15753502]

    Anesth Analg. 1996 Nov;83(5):1129

    [PubMed: 7618711]

    Anesthesiology. 2006 Mar;104(3):617; author reply 618-9

    [PubMed: 16052126]

    Anesth Analg;2005 Nov;101(5):1542-5

    [PubMed: 16244029]


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Answered correctly


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