Effect of prosthesis number and position on rima glottidis area in equine laryngeal specimens.
Authors: Dart Andrew, Tee Elizabeth, Brennan Moses, Dart Christina, Perkins Nigel, Chapman Stella, Debney Sally
Journal: Veterinary surgery : VS
Summary
# Editorial Summary: Laryngeal Prosthesis Placement and Airway Outcomes Laryngoplasty using prosthetic sutures is a standard surgical approach to treating recurrent laryngeal neuropathy in horses, yet optimal placement strategy has lacked empirical support. Dart and colleagues examined how single versus dual suture placement affects rima glottidis area—a key measure of post-surgical airway patency—using 16 cadaveric larynges with standardised suture positioning: one suture placed dorsally through the cricoid and proximal muscular process, and a second positioned 1.5 cm laterally but more caudally and distally within the muscular process. Whilst individual dorsal and lateral sutures produced comparable rima glottidis areas (no significant difference), combining both sutures substantially increased cross-sectional airway area compared to either alone (P<0.001 for both comparisons), with excellent repeatability across replicate measurements (intraclass correlation 0.997–0.998). For practitioners, these findings suggest that dual-prosthesis laryngoplasty—rather than single-suture techniques—may yield superior functional outcomes by allowing independent contribution of each suture to glottic opening, potentially translating to improved post-operative breathing capacity and exercise tolerance in affected horses.
Read the full abstract on PubMed
Practical Takeaways
- •Using 2 prosthetic sutures in laryngoplasty produces a larger airway opening than single-suture techniques, potentially improving breathing outcomes in horses with laryngeal paralysis
- •The specific placement matters: dorsal suture at the cricoid caudal rim plus lateral suture 1.5cm lateral and more distal/caudal provides additive benefit rather than redundant tension
- •This study provides a biomechanical rationale for adopting dual-suture laryngoplasty techniques in clinical practice
Key Findings
- •Dorsal and lateral sutures alone produced similar rima glottidis areas (P=0.85)
- •Combined dorsal and lateral sutures (2 prostheses) significantly increased rima glottidis area compared to either suture alone (P<0.001)
- •Excellent repeatability demonstrated with coefficient of variation 1-7% and intraclass correlation coefficients 0.997-0.998 across all suture configurations