Effect of prosthesis number and position on rima glottidis area in equine laryngeal specimens.
Abstract: To assess the effect of 1 or 2 laryngeal prosthetic sutures on rima glottidis areas in equine laryngeal specimens. Methods: Experimental, randomized design. Methods: Cadaveric equine larynges (n=16). Methods: Larynges were collected from 10 horses; 2 sutures each were preplaced in the right and left sides of each larynx. A dorsal suture (DS) was placed through the caudal rim of the dorsal midline of the cricoid cartilage, under the cricopharyngeus muscle and through the proximal and rostral aspect of the muscular process. A lateral suture (LS) was placed 1.5 cm lateral to the DS and through the muscular process more distal and caudal to the 1st suture. Larynges were positioned in a customized stand and the rima glottidis photographed after each suture (LS or DS) or suture combination (CS) was tied in random sequence. An additional 6 larynxes were used to determine whether the tension applied to the sutures was repeatable. Sutures were preplaced in both the right and left side of each larynx as described above and each suture and CS was tied and released 3 times in each larynx. Photographs were taken of the rima glottidis after each suture or CS was tied generating 3 replicates for each suture configuration on each side of the 6 larynges. Results: Mean rima glottidis area was not different between DS and LS when tied alone (P=.85); however, mean area after CS (DS+LS) was greater than DS (P<.001) and LS (P<.001) alone. The coefficient of variation for the 6 suture patterns were low (1-7%) and the intraclass correlation coefficient estimates were very high (0.997-0.998) demonstrating excellent repeatability between replicates for each of the 3 suture configurations. Conclusions: Our results suggest that laryngoplasty using 2 prostheses; 1 placed dorsally in the cricoid and through the rostral and proximal muscular process and 1 placed 1.5 cm lateral to the 1st and more caudal and distal in the muscular process results in a greater cross sectional area of the rima glottidis than either suture used alone. Conclusions: Seemingly prosthetic sutures contribute independently to each other in determining the contour of the rima glottidis. Use of 2 prosthetic sutures improves crosssectional area of the rima glottidis compared with each suture alone and may improve surgical outcome in laryngoplasty.
Publication Date: 2009-06-23 PubMed ID: 19538665DOI: 10.1111/j.1532-950X.2009.00525.xGoogle Scholar: Lookup
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Summary
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This research paper studied how the use of one or two laryngeal prosthetic sutures affected the area of the rima glottidis (the opening between the vocal cords) in horse laryngeal specimens. The results show that using two prosthetic sutures—positioned in specific areas of the larynx—increased the rima glottidis area compared to when each suture was used individually.
Methodology
- To conduct this experiment, larynges were collected from 16 dead horses.
- Two sutures were placed in both sides of the larynx, one suture was placed dorsally (DS) at the caudal rim of the dorsal midline of the cricoid cartilage, the other suture was placed laterally (LS), 1.5 cm away from DS.
- Using a specifically designed stand, the larynges were positioned and photographed after each suture, alone and in combination, was tied.
- In addition, six other larynges were used to test reproducibility. These followed the same suture process, and each suture and combination was tied and untied three times, with photographs taken after each tie.
Results
- The data showed that there was no significant difference in rima glottidis area when comparing the DS or LS sutures when used on their own.
- However, when both sutures were tied together in a combination suture (CS), there was a significant increase in the area of the rima glottidis compared to either DS or LS suture alone.
- The experiment also demonstrated an excellent level of reproducibility. Coefficients of variation for the six suture patterns ranged from 1-7%, suggesting a low level of variability among replicates. Furthermore, the intraclass correlation coefficients, which measure agreement among measures, were very high for each of the suture configurations used.
Conclusion
- From these findings, the researchers concluded that a laryngoplasty procedure using two prosthetic sutures, positioned in specific areas, produced a larger cross-sectional area of the rima glottidis than when either suture was used alone.
- This increase in rima glottidis area could potentially improve surgical outcomes in laryngoplasty. The research also indicates that each prosthetic suture contributes to determining the contour of the rima glottidis independently from the other.
Cite This Article
APA
Dart A, Tee E, Brennan M, Dart C, Perkins N, Chapman S, Debney S.
(2009).
Effect of prosthesis number and position on rima glottidis area in equine laryngeal specimens.
Vet Surg, 38(4), 452-456.
https://doi.org/10.1111/j.1532-950X.2009.00525.x Publication
Researcher Affiliations
- Faculty of Veterinary Science, The University of Sydney, Camden and Austvet Animal Health Services, Toowoomba, Australia. andrewd@camden.usyd.edu.au
MeSH Terms
- Animals
- Glottis / surgery
- Horse Diseases / surgery
- Horses
- Sutures / veterinary
- Vocal Cord Paralysis / surgery
- Vocal Cord Paralysis / veterinary
Citations
This article has been cited 1 times.- 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.
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