Document Detail


Comparison of sonography and computed tomography as imaging tools for assessment of airway structures.
MedLine Citation:
PMID:  21705729     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
Objectives- The aim of this study was to compare airway anatomic parameters as measured by sonography and computed tomography (CT). Methods- Fifteen adult patients underwent CT followed by sonography of the anterior neck under standard conditions. A radiologist and an anesthesiologist with experience in airway imaging examined the scans and performed measurements of specific airway parameters: distance to the posterior surface of the tongue, thickness of the submental region, hyomental distance, depth of the epiglottis from skin (above and below the hyoid bone), thyrohyoid distance, depth of the arytenoid cartilage from skin, and fat pad thickness at the thyroid cartilage. After performing the measurements, they compared the images by the two modalities for descriptions of the structures. Means and SDs were calculated for the measurements, and a paired t test was performed to determine statistically significant differences in the measurements by sonography and CT. Results- The means of all parameters were closely related except hyomental distance (sonography, 5.23 ± 0.58 cm; CT, 3.50 ± 0.42 cm). The paired t test showed that the mean values for depth of the epiglottis below the hyoid (3.89 versus 4.17 cm; P = .31), thyrohyoid distance (1.03 versus 1.02 cm; P = .95), and depth of the arytenoid cartilage (2.90 versus 2.66 cm; P = .21) were not significantly different as measured by sonography and CT, respectively. Conclusions- The study shows that sonography can reliably image all of the structures visualized by CT, and in general, infrahyoid parameters agree well between the two modalities, as opposed to suprahyoid parameters, which may be affected by unintentional head extension.
Authors:
Arun Prasad; Eugene Yu; David T Wong; Reena Karkhanis; Patrick Gullane; Vincent W S Chan
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine     Volume:  30     ISSN:  1550-9613     ISO Abbreviation:  J Ultrasound Med     Publication Date:  2011 Jul 
Date Detail:
Created Date:  2011-06-27     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8211547     Medline TA:  J Ultrasound Med     Country:  United States    
Other Details:
Languages:  eng     Pagination:  965-72     Citation Subset:  IM    
Affiliation:
MBDA, FRCA, FRCPC, Department of Anesthesia, University Health Network, Toronto Western Hospital, 399 Bathurst St, McL 2-405, Toronto, ON M5T 2S8, Canada. arun.prasad@uhn.on.ca.
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