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Published on: July 14, 2023
Airway dimensions from fetal life to adolescence-A literature overview
Mital H Dave1, Kathrin Schmid1, Markus Weiss1
1Department of Anesthesia and Children's Research Center, University Children's Hospital, Zürich, Switzerland.
Insights
This review found that existing data on pediatric airway dimensions are too varied to create clinical guidelines. More comprehensive studies are needed to establish reliable pediatric airway nomograms for equipment selection.
Area of Science:
- Pediatric Anesthesiology
- Medical Imaging
- Anatomy
Background:
- Accurate pediatric airway dimensions are crucial for selecting appropriate airway management devices.
- Current data on pediatric airway dimensions are fragmented and lack standardization.
Purpose of the Study:
- To synthesize existing data on pediatric airway dimensions.
- To identify gaps in current research for clinical application.
Main Methods:
- Systematic literature search across multiple databases (PubMed, Scopus, Embase, Web of Science, Prisma, Google Scholar).
- Analysis of 109 studies published between 1923 and 2018.
- Inclusion and exclusion criteria applied to select relevant studies.
Main Results:
- Six measurement methods were identified: anatomical examination, X-ray, CT, MRI, bronchoscopy, and ultrasound.
- Anatomical and CT studies are considered most reliable; ultrasound shows promise for neonates.
- Significant heterogeneity in data presentation and study conditions hinders comparability.
Conclusions:
- Existing studies on pediatric airway dimensions exhibit high heterogeneity, preventing the creation of clinical normograms.
- There is a critical need for comprehensive studies in large pediatric populations to develop reliable airway dimension nomograms.
Background:
Data on airway dimensions in pediatric patients are important for proper selection of pediatric airway equipment such as endotracheal tubes, double-lumen tubes, bronchial blockers, or stents. The aim of the present work was to provide a synopsis of the available data on pediatric airway dimensions.
Methods:
A systematic literature search was carried out in the PubMed database, Scopus, Embase, Web of Science, Prisma, and Google Scholar and secondarily completed by a reference search. Based on inclusion and exclusion criteria, a final selection of 109 studies with data on pediatric airway dimensions published from 1923 to 2018 were further analyzed.
Results:
Six different airway measurement methods were identified. They included anatomical examinations, chest X-ray, computed tomography, magnetic resonance tomography, bronchoscopy, and ultrasound. Anatomical studies were more abundant compared to other methods. Data provided were very heterogeneously presented and powered. In addition, due to different study conditions, they are hardly comparable. Among all, anatomical and computer tomography studies are thought to provide the most reliable data. Ultrasound is an upcoming technique to estimate airway parameters of fetus and premature infants. There was, in general, a lack of comprehensive studies providing a complete range of airway dimensions in larger groups of patients from birth to adolescence.
Conclusions:
This work revealed a large heterogeneity of studies providing data on pediatric airway dimensions, making it impossible to compare, or assemble them to normograms for clinical use. Comprehensive studies in large population of children are needed to provide full range nomograms on pediatric airway dimensions.
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