Chinese Journal of Tissue Engineering Research ›› 2010, Vol. 14 ›› Issue (26): 4796-4800.doi: 10.3969/j.issn.1673-8225.2010.26.011

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Construction and spatial directions analysis of digitized visible model of frontal sinus drainage pathway

Wang Xiao-lu1, Shan Xi-zheng1, Gao Jian-hua2   

  1. 1Department of Otolaryngology Head and Neck Surgery, 2Department of Computed Tomography, General Hospital of Armed Police Forces, Beijing  100039, China
  • Online:2010-06-25 Published:2010-06-25
  • Contact: Shan Xi-zheng, Master, Professor, Department of Otolaryngology Head and Neck Surgery, General Hospital of Armed Police Forces, Beijing 100039, China
  • About author:Wang Xiao-lu, Doctor, Attending physician, Department of Otolaryngology Head and Neck Surgery, General Hospital of Armed Police Forces, Beijing 100039, China lwh_ln@163.com
  • Supported by:

    a Grant from General Hospital of Armed Police Forces, No. WJ2008- 009*

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Abstract:

BACKGROUND: Correct understanding of accessory nasal sinuses anatomic features is important for improving operative success and reducing complications. Two-dimensional CT images limit preoperative evaluation of frontal sinus cells and drainage pathway.
OBJECTIVE: To develop the digitized visible model and to analyze the endoscopic space of the frontal sinus drainage pathway (FSDP) and related structures.
METHODS: To create digitized visible model of the FSDP and related structures with the coronal CT data sets of a patient by AutoCAD (computer aided design), MOI (Moment of Inspiration) and SketchUp software package. The spatial relationship of the FSDP and related structures in the 0°rod-lens telescope with the 60° elevation angle (between the endoscope and bottom of nasal cavity) was simulated and observed. The images from the coronal CT were compared with the images of CT in the endoscope. The operation of the endoscope surgery was simulated. 
RESULTS AND CONCLUSION: The digitized visible model of the FSDP and related structures for the endoscopic surgery was successfully reconstructed. The changes of visual spatial orientation were consistent with the perspective law. The drainage pathway and the spatial relationship of frontal sinus with related structures could be observed. The simulation of the endoscopic surgical process of the FSDP and related structures may be used for establishing the right visuospatial relationship. There were differences in the image of two dimensions, the solid of three dimensions and the visual field of the endoscope, which validated the perspective law in the visual space of the endoscope. The visuospatial concept of the endoscope was brought and emphasized. Digitized visible model provides the means to learn the endoscopic anatomy of the FSDP and can be used as teaching and simulating tool of surgical techniques.

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