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[Anatomical limits of endonasal ethmoidectomy]
J M Prades1, C Veyret, C Martin
1Service d'ORL, CHU Bellevue, Laboratoire d'Anatomie, Faculté de Médecine de Saint-Etienne.
Summary
This study defines constant anatomical boundaries of the ethmoid lateral mass. These landmarks, including the starred groove formation, guide safe endoscopic ethmoidectomy.
Area of Science:
- Anatomy
- Surgical Navigation
- Endoscopic Sinus Surgery
Background:
- The ethmoid bone's lateral mass presents complex anatomical challenges during endoscopic sinus surgery.
- Precise identification of ethmoidal boundaries is crucial for surgical safety and efficacy.
Purpose of the Study:
- To delineate consistent anatomical boundaries of the ethmoid lateral mass.
- To identify key intraoperative landmarks for safe endoscopic ethmoidectomy.
Main Methods:
- Microdissections of 12 subjects.
- Endoscopic examinations.
- Computed tomography (CT) imaging and histological analysis.
Main Results:
- Constant anatomical boundaries of the ethmoid lateral mass were identified.
- The lateral orbital and superior craniofrontal surfaces serve as guides for boundary identification.
- Key safety beacons include the "starred groove formation", ethmoidal roof lamina, and ethmoidosphenoidal recesses.
Conclusions:
- The identified anatomical boundaries and safety beacons provide critical guidance for performing endonasal ethmoidectomy.
- These landmarks enhance surgical precision and patient safety during endoscopic procedures involving the ethmoid sinus.