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Airway length in adults: estimation of the optimal endotracheal tube length for orotracheal intubation.

Abstract：

STUDY OBJECTIVE:To estimate the optimal endotracheal tube (ETT) length in orotracheally intubated patients. DESIGN:Prospective study. SETTING:Operating room of a medical center hospital. PATIENTS:293 ASA physical status I and II patients (150 male and 143 female), requiring general anesthesia and orotracheal intubation. INTERVENTIONS:We used fiberoptic bronchoscope within the ETT to identify the carina and vocal cords. MEASUREMENTS:The length from carina to vocal cords, vocal cords to right mouth angle (corner), and carina to right mouth angle were measured. The optimal ETT tip was defined as 5 cm above the carina. Patient's height and sternum length were recorded. MAIN RESULTS:The correlation between airway length and body height was significant. By linear regression, a formula was obtained to estimate the optimal ETT length in orotracheally intubated patients: the length from 5 cm above carina to right mouth angle (cm) =< body height (cm)/5> - 13. CONCLUSION:The optimal insertion length of the ETT for orotracheally intubated adult patients with the head placed in a neutral position is correlated with body height. The proposed formula can provide a useful guide to determine the optimal ETT tip position in most of the patients who required orotracheal intubation.

journal_name

J Clin Anesth

journal_title

Journal of clinical anesthesia

authors

Cherng CH,Wong CS,Hsu CH,Ho ST

doi

10.1016/s0952-8180(02)00355-0

subject

Has Abstract

pub_date

2002-06-01 00:00:00

pages

271-4

issue

4

eissn

0952-8180

issn

1873-4529

pii

S0952818002003550

journal_volume

14

pub_type

杂志文章

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