Korean J Anesthesiol.  2010 Oct;59(4):249-255. 10.4097/kjae.2010.59.4.249.

Assessment of airway length of Korean adults and children for otolaryngology and ophthalmic surgery using a fiberoptic bronchoscope

• Pak HJ
• Hong BH
• Lee WH

• KMID: 1766444
• DOI: http://doi.org/10.4097/kjae.2010.59.4.249

Abstract

BACKGROUND
Knowledge regarding normal upper airway anatomy is essential for airway management and is required to prevent malpositioning of endotracheal tubes. We evaluated the length of the upper airway in Korean children and adults who had no abnormality of the upper airway using a fiberoptic bronchoscope.
METHODS
Eighty seven patients aged 5 to 81 years undergoing noninvasive elective surgery were included in this study. After induction of anesthesia was complete, we measured the distance from the upper incisor to various components of the upper airway by fiberoptic bronchoscopy.
RESULTS
In adults, the mean length between the upper incisor and midtrachea was found to be 21.8 +/- 1.8 cm in males and 19.9 +/- 1.3 cm in females, while the mean length of the trachea was 10.1 +/- 1.3 cm in males and 10.3 +/- 1.6 cm in females. The length between the upper incisor and midtrachea (IT) were correlated with height both in children (IT [cm] = 2.531 + 0.109 x height [cm]) and adults (IT [cm] = 0.167 + 0.127 x height [cm]), which shows that they differ from the western standard (length of tube [cm] = 5 + 0.1 x height [cm]).
CONCLUSIONS
In adults and children, the length from the incisor to the midtrachea was significantly different when compared with western standards. Therefore, re-evaluation of the proper and precise depth of endotracheal tube in Koreans should be considered.

Keyword

Bronchoscopy; Intratracheal; Intubation

MeSH Terms

Adult
Aged
Airway Management
Anesthesia
Bronchoscopes
Bronchoscopy
Child
Female
Humans
Incisor
Intubation
Male
Otolaryngology
Trachea