In vitro effect of ventriculocordectomy before laryngoplasty on abduction of the equine arytenoid cartilage.
Abstract: To determine whether ventriculocordectomy (VCE) performed before prosthetic laryngoplasty (PL) results in increased rima glottidis size compared with PL alone. Methods: Experimental study. Methods: Equine cadaver larynges (n=13). Methods: Right arytenoid cartilages were maximally abducted using a standard PL technique. Standard PLs were then performed on the left side and the force required to maximally abduct the left arytenoid cartilage recorded (F(max) ). Photographs were taken of the rima glottidis at zero force and at five equal levels of force up to F(max) . The force applied was released, left VCE performed, and photographs repeated. Arytenoid left:right angle quotients (LRQ) and glottic cross-sectional area ratios (CSAR) were calculated at each force level in each condition (PL and VCE-PL). Results: Mean LRQ and CSAR for both PL and VCE-PL increased with increasing force, initially rapidly before plateauing at ~50% of F(max) . LRQ and CSAR were significantly greater for VCE-PL than for PL (P<.001). When VCE was performed before PL, 12% less force was required to achieve an LRQ of 0.8, and 45% less for a CSAR of 0.8. Conclusions: In vitro, VCE performed before PL enables the arytenoid cartilage to be abducted to a greater degree for a given PL suture force.
© Copyright 2011 by The American College of Veterinary Surgeons.
Publication Date: 2011-02-11 PubMed ID: 21314703DOI: 10.1111/j.1532-950X.2011.00796.xGoogle Scholar: Lookup
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Summary
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This research explores whether performing a ventriculocordectomy before a prosthetic laryngoplasty on equine larynges can result in a more extensive opening of the vocal cord gap (rima glottidis). The study concluded that prior ventriculocordectomy significantly increases the abduction of the arytenoid cartilage for a given laryngoplasty suture force.
Research Methods and Process
- The study used thirteen equine cadaver larynges to test the procedure known as ventriculocordectomy (VCE), which involves removing portions of the vocal cords and ventricle, prior to prosthetic laryngoplasty (PL), a surgical method for addressing airway obstruction.
- The right arytenoid cartilages of the specimens were abducted using a standard PL technique.
- The left arytenoid cartilages were treated with a combination of the two methods (VCE-PL), and the force required for maximum abduction was recorded.
- The researchers took photographs of the rima glottidis, the opening between the vocal cords, at different levels of force up to the maximum required force. This process was repeated after the VCE had been performed.
- A series of measurements (arytenoid left:right angle quotients (LRQ) and glottic cross-sectional area ratios (CSAR)) were computed at each force level for each condition (PL and VCE-PL).
Research Findings
- Both LRQ and CSAR increased with increasing force, rapidly at first before reaching a plateau at around 50% of the maximum force.
- The measurements for both LRQ and CSAR were significantly higher for the combined VCE-PL procedure than for the standalone PL procedure (P<.001).
- When VCE was performed before PL, 12% less force was required to achieve an LRQ of 0.8, and 45% less for a CSAR of 0.8. This indicates a significant increase in efficiency of the combined procedure compared to the standalone one.
Conclusion
- The results suggest that performing a ventriculocordectomy before a prosthetic laryngoplasty allows for a greater degree of arytenoid cartilage abduction for a given suture force.
- This could lead to improved procedures for addressing airway obstruction in horses, potentially improving their respiratory health and athletic performance.
Cite This Article
APA
Perkins JD, Meighan H, Windley Z, Troester S, Piercy R, Schumacher J.
(2011).
In vitro effect of ventriculocordectomy before laryngoplasty on abduction of the equine arytenoid cartilage.
Vet Surg, 40(3), 305-310.
https://doi.org/10.1111/j.1532-950X.2011.00796.x Publication
Researcher Affiliations
- Department of Veterinary Clinical Sciences, Royal Veterinary College, Hawkshead Lane, North Mymms, Hatfield, Hertfordshire, UK. jperkins@rvc.ac.uk
MeSH Terms
- Animals
- Arytenoid Cartilage / surgery
- Cadaver
- Glottis / anatomy & histology
- Horses
- Laryngoplasty / methods
- Laryngoplasty / veterinary
Citations
This article has been cited 3 times.- Byrne CA, Hotchkiss JW, Barakzai SZ. Variations in the application of equine prosthetic laryngoplasty: A survey of 128 equine surgeons.. Vet Surg 2023 Feb;52(2):209-220.
- Gray SM, Gutierrez-Nibeyro SD, Horn GP, McCoy AM, Schaeffer DJ, Stewart M. The effect of repeated freezing and thawing on the suture pull-out strength in equine arytenoid and cricoid cartilages.. Vet Surg 2022 Oct;51(7):1106-1110.
- Lean NE, Bertin FR, Ahern BJ. Influence of unilateral and bilateral vocal cordectomy on airflow across cadaveric equine larynges at different Rakestraw grades of arytenoid abduction.. Vet Surg 2022 Aug;51(6):974-981.
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