Intubation Clinical Trial
Official title:
Relationship of Cricoid With the Right and Left Bronchial Diameters in the Pediatric Population Using Three-dimensional Imaging.
Specific and objective guidelines for choosing endobronchial tube size for main-stem intubation in pediatric patients are lacking. The objective criteria for choosing an ETT size for OLV are likely to increase the safety and success. The primary aims of this study were to define the relationship between cricoid and mainstem bronchi (right and left) in children of various ages and to determine the effects of age, height and weight.
Understanding the relationship between cricoid and mainstem bronchi can provide to be a
useful adjunct for lung isolation in children. The relationship between cricoid dimensions
and the dimensions of main-stem bronchi (right and left) have been studied using 2
dimensional CT images and video-bronchoscopic images. The present study defines the
volume-based relationship between the right main-stem bronchus (RMSB), left main-stem
bronchus (LMSB) and the cricoid ring based on 3 dimensional CT derived images.
Methods: The three dimensional CT images of 35 children, younger than 8 years, undergoing
radiological evaluation unrelated to airway symptomatology were examined. The children were
evaluated during spontaneous ventilation without airway devices either during natural sleep
or with sedation. The 3-dimensional images of the airway column were evaluated at the level
of cricoid, right mainstem bronchus and left main-stem bronchus, volumes were calculated and
comparisons made between these levels. Univariate and multivariate regression analysis was
used to determine whether one or more of the variables (age, gender, height, weight and
cricoid) had a predictable relationship to the RMSB and the LMSB diameter.
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