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Volume estimation of the preepiglottic and paraglottic space using spiral computed tomography

Evaluation du volume de l'espace pré-épiglottique et para-glottique en tomodensitométrie hélicoïdale

  • Radiologic Anatomy
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Summary

The purpose of this study was to estimate the volume variability of the preepiglottic and paraglottic space in the normal larynx. In 23 adult patients (12 women, 11 men), a spiral CT acquisition through the larynx was obtained. No laryngeal pathology was observed. The area of the this submucosal fat space was estimated on each slice by semiautomatic segmentation; the volume was calculated by the summation-of-areas technique. The obtained volumes were correlated with body area, body mass index and gender. The mean estimated volume of the preepiglottic and paraglottic space was 2.8 ml (SD 1.7 ml, range 0.7–5.9). No correlation with body mass index (p=0.6), but a significant correlation with body area (p<0.001) was found. A significant volume difference was present between men (mean 4.5 ml, SD 1.0 ml, range 2.8–5.9) and women (mean 1.4 ml, SD 0.5 ml, range 0.7–2.4) (p<0,0001). Multiple regression analysis showed gender (p<0,0001) to be a more important variable than body area (p=0,17) in predicting the volume of the preepiglottic and paraglottic space. In conclusion, the volume of the preepiglottic and paraglottic space appears to be very variable, and should only be analysed with consideration of the gender of the examined subjects.

Résumé

Le but de cette étude était de déterminer les variations de volume de l'espace pré-épiglottique et para-glottique sur le larynx normal. 23 patients adultes (12 femmes, 11 hommes) ont bénéficié d'une acquisition hélicoïdale sur le larynx en tomodensitométrie. L'aire de l'espace graisseux sous muqueux laryngé était évaluée par une technique de segmentation spatiale semiautomatique. Le volume total correspondant était alors calculé par addition des aires ainsi déterminées sur chaque coupe. Ces volumes étaient corrélés avec la surface corporelle, l'indice de masse corporelle et le sexe. Le volume moyen de l'espace pré-épiglottique et para-glottique était évalué à 2,8 ml (déviation standard 1,7 ml ; extrêmes 0,7–5,9). Il n'existait pas de corrélation avec l'indice de masse corporelle (p=0,6) mais il y avait une corrélation significative avec la surface corporelle (p<0.001). Il existait une différence de volume significative entre les hommes (moyenne 4,5 ml ; déviation standard 1,0 ml ; extrêmes 2,8–5,9) et les femmes (moyenne 1,4 ml ; déviation standard 0,5 ml ; extrêmes 0,7–2,4 (p<0,0001). L'analyse des régressions multiples a montré que le critère de sexe (p<0.0001) était beaucoup plus important que la surface corporelle (p=0,17) pour prédire le volume de l'espace pré-épiglottique et para-glottique. En conclusion, le volume de l'espace pré-épiglottique et para-glottique apparaît être variable et ne devrait être analysé qu'en prenant en considération le sexe des sujets examinés.

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Hermans, R., Van der Goten, A. & Baert, A.L. Volume estimation of the preepiglottic and paraglottic space using spiral computed tomography. Surg Radiol Anat 19, 185–188 (1997). https://doi.org/10.1007/BF01627973

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