Thyromental distance

Thyromental distance (TMD) measurement is a method commonly used to predict the difficulty of intubation^[1] and is measured from the thyroid notch to the tip of the jaw with the head extended.^[2] If it is less than 7.0 cm with hard scarred tissues, it indicates possible difficult intubation.^[3]

References

^ Baker, PA; Depuydt, A; Thompson, JM (Aug 2009). "Thyromental distance measurement--fingers don't rule". Anaesthesia. 64 (8): 878–82. doi:10.1111/j.1365-2044.2009.05985.x. PMID 19604192. S2CID 33007204.
^ "Fig.1: Thyromental position". e-SAFE, Royal College of Anaesthetists and The Association of Anaesthetists of Great Britain and Ireland. Retrieved 2 February 2014.
^ "Fig.2: Thyromental position". e-SAFE, Royal College of Anaesthetists and The Association of Anaesthetists of Great Britain and Ireland. Retrieved 2 February 2014.

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