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.
"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.

Anesthesia and anesthesiology
Types	General Sedation Twilight anesthesia Local Topical Intercostal nerve block Neuraxial blockade Spinal Epidural Dental Inferior alveolar nerve
Techniques	Airway management Anesthesia provision in the US Arterial catheter Bronchoscopy Capnography Dogliotti's principle Drug-induced amnesia Intraoperative neurophysiological monitoring Nerve block Penthrox inhaler Tracheal intubation
Scientific principles	Blood–gas partition coefficient Concentration effect Fink effect Minimum alveolar concentration Second gas effect
Measurements	ASA physical status classification system Baricity Bispectral index Entropy monitoring Fick principle Goldman index Guedel's classification Mallampati score Neuromuscular monitoring Thyromental distance
Instruments	Anaesthetic machine Anesthesia cart Boyle's machine Gas cylinder Laryngeal mask airway Laryngeal tube Medical monitor Odom's indicator Relative analgesia machine Vaporiser Double-lumen endotracheal tube Endobronchial blocker
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Professions	Anesthesiologist Anesthesiologist assistant Nurse anesthetist Operating department practitioners Certified Anesthesia Technician Certified Anesthesia Technologist Anaesthetic technician Physicians' assistant (anaesthesia)
History	ACE mixture Helsinki Declaration for Patient Safety in Anaesthesiology History of general anesthesia History of neuraxial anesthesia History of tracheal intubation
Organizations	American Association of Nurse Anesthetists American Society of Anesthesia Technologists & Technicians American Society of Anesthesiologists Anaesthesia Trauma and Critical Care Association of Anaesthetists of Great Britain and Ireland Royal College of Anaesthetists Association of Veterinary Anaesthetists Australian and New Zealand College of Anaesthetists Australian Society of Anaesthetists International Anesthesia Research Society
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Thyromental distance

See also

References