Optimal Arytenoid Position in Laryngeal Framework Surgery: An Anatomic Human Larynx Study

Area of Science:

• Otolaryngology
• Surgical Anatomy
• Laryngeal Physiology

Background:

• Arytenoid medialization is crucial for voice restoration.
• Understanding cricoarytenoid joint anatomy is key for effective surgical techniques.
• Arytenopexy stitch placement variations can impact surgical outcomes.

Purpose of the Study:

• To measure normative cricoarytenoid joint anatomy.
• To evaluate the effects of different arytenopexy stitch placements on arytenoid medialization.
• To determine optimal suture placement for arytenoid repositioning.

Main Methods:

• Anatomical measurements of 45 human larynges using digital calipers.
• Suturing of arytenoids in six fresh larynges with varying stitch configurations.
• Quantification of arytenoid medial displacement and glottic aperture changes using ImageJ.

Main Results:

• Significant differences in cricoid and arytenoid cartilage dimensions were observed between males and females.
• Superior-medial arytenoid suture placement resulted in greater medialization (2.2 mm vs 1.0 mm) and improved glottic aperture (9.5° vs 2.7°).
• P-values < .001 indicate statistical significance for superior-medial placement benefits.

Conclusions:

• Consistent cricoarytenoid anatomy offers reliable surgical landmarks.
• Superior-medial placement of arytenopexy sutures optimizes arytenoid medialization.
• This technique can be reliably reproduced for effective arytenoid repositioning.