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

Pak HJ, Hong BH, Lee WH - Korean J Anesthesiol (2010)

Bottom Line: 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.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.

View Article: PubMed Central - PubMed

Affiliation: Department of Anesthesiology and Pain Medicine, Chungnam National University School of Medicine, Daejeon, Korea.

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 × height [cm]) and adults (IT [cm] = 0.167 + 0.127 × height [cm]), which shows that they differ from the western standard (length of tube [cm] = 5 + 0.1 × 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.

No MeSH data available.


Related in: MedlinePlus

Linear regression of the length between the incisor and left (A) and right (B) main bronchus and height in Korean adults. ILt: length between incisor and left main bronchus. ILt = 3.383 + 0.169 × height, R2 = 0.553, P < 0.001. IRt: length between incisor and right main bronchus. IRt = 3.500 + 0.153 × height, R2 = 0.501, P < 0.001.
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Figure 3: Linear regression of the length between the incisor and left (A) and right (B) main bronchus and height in Korean adults. ILt: length between incisor and left main bronchus. ILt = 3.383 + 0.169 × height, R2 = 0.553, P < 0.001. IRt: length between incisor and right main bronchus. IRt = 3.500 + 0.153 × height, R2 = 0.501, P < 0.001.

Mentions: The length between the upper incisor to the right and left main bronchus (ILt, IRt) was significantly correlated with height, weight, and sitting height (P < 0.05). Among these, the height and the length from the upper incisor to the right and left main bronchus (ILt = 3.383 + 0.169 × height, IRt = 3.500 + 0.153 × height) had the highest coefficient of determination (each R2 = 0.553, R2 = 0.501) (Fig. 3). However, the length from the carina to the right and left main bronchus was not significantly correlated with age, height, weight, sitting height, or chest width (P > 0.05).


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

Pak HJ, Hong BH, Lee WH - Korean J Anesthesiol (2010)

Linear regression of the length between the incisor and left (A) and right (B) main bronchus and height in Korean adults. ILt: length between incisor and left main bronchus. ILt = 3.383 + 0.169 × height, R2 = 0.553, P < 0.001. IRt: length between incisor and right main bronchus. IRt = 3.500 + 0.153 × height, R2 = 0.501, P < 0.001.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC2966705&req=5

Figure 3: Linear regression of the length between the incisor and left (A) and right (B) main bronchus and height in Korean adults. ILt: length between incisor and left main bronchus. ILt = 3.383 + 0.169 × height, R2 = 0.553, P < 0.001. IRt: length between incisor and right main bronchus. IRt = 3.500 + 0.153 × height, R2 = 0.501, P < 0.001.
Mentions: The length between the upper incisor to the right and left main bronchus (ILt, IRt) was significantly correlated with height, weight, and sitting height (P < 0.05). Among these, the height and the length from the upper incisor to the right and left main bronchus (ILt = 3.383 + 0.169 × height, IRt = 3.500 + 0.153 × height) had the highest coefficient of determination (each R2 = 0.553, R2 = 0.501) (Fig. 3). However, the length from the carina to the right and left main bronchus was not significantly correlated with age, height, weight, sitting height, or chest width (P > 0.05).

Bottom Line: 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.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.

View Article: PubMed Central - PubMed

Affiliation: Department of Anesthesiology and Pain Medicine, Chungnam National University School of Medicine, Daejeon, Korea.

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 × height [cm]) and adults (IT [cm] = 0.167 + 0.127 × height [cm]), which shows that they differ from the western standard (length of tube [cm] = 5 + 0.1 × 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.

No MeSH data available.


Related in: MedlinePlus