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Discovering Middle Ear Anatomy by Transcanal Endoscopic Ear Surgery: A Dissection Manual
Published on: January 11, 2018
Accessory ethmoidal foramina: an anatomical study.
Yasuhiro Takahashi1, Hirohiko Kakizaki, Takashi Nakano
1Department of Ophthalmology, Aichi Medical University, Nagakute, Aichi, Japan.
Ophthalmic Plastic and Reconstructive Surgery
|January 13, 2011
Summary
Accessory ethmoidal foramina were found in 33.3% of orbits. These anatomical landmarks are crucial for safe medial orbital wall surgeries, guiding surgeons in precise procedures.
Area of Science:
- Anatomy
- Ophthalmology
- Surgical Anatomy
Background:
- The ethmoidal foramina are critical anatomical structures within the medial orbital wall.
- Variations in these foramina can impact surgical approaches to the orbit.
Purpose of the Study:
- To measure distances from the anterior lacrimal crest to ethmoidal foramina and the optic canal in adult cadavers.
- To identify and characterize accessory ethmoidal foramina.
Main Methods:
- Dissection and measurement of 54 orbits from 27 Japanese cadavers.
- Definition of anterior, posterior, and accessory ethmoidal foramina.
- Measurement of distances from the anterior lacrimal crest to key foramina and the optic canal.
Main Results:
- Accessory ethmoidal foramina were present in 33.3% of orbits.
- The middle ethmoidal foramen was located approximately 29.8 mm posterior to the anterior lacrimal crest.
- Mean distances to anterior ethmoidal foramen, posterior ethmoidal foramen, and optic canal were 19.6 mm, 33.5 mm, and 41.9 mm, respectively.
Conclusions:
- Accessory ethmoidal foramina are common anatomical variations.
- Precise knowledge of these foraminal locations aids in safe and accurate medial orbital wall surgery.
- These findings contribute to improved surgical planning and outcomes.
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