Optimal Tension, Position, and Number of Prostheses Required for Maximum Rima Glottidis Area After Laryngoplasty

Authors

  • Andrea S. Bischofberger Dr Med Vet,

    1. Biomedical Research and Clinical Trials Unit, University Veterinary Teaching Hospital, University of Sydney, Camden, Australia
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  • Marta M. Wereszka BVSc Dip ACVS,

    1. Biomedical Research and Clinical Trials Unit, University Veterinary Teaching Hospital, University of Sydney, Camden, Australia
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  • Ines Hadidane,

    1. Biomedical Research and Clinical Trials Unit, University Veterinary Teaching Hospital, University of Sydney, Camden, Australia
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  • Nigel R. Perkins BVSc, PhD, Dip ACT,

    1. Ausvet Animal Health Services, Toowoomba, Australia
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  • Leo B. Jeffcott MA, BVetMed, PhD, DVSc, FRCVS,

    1. Biomedical Research and Clinical Trials Unit, University Veterinary Teaching Hospital, University of Sydney, Camden, Australia
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  • Andrew J. Dart BVSc, PhD, Dip ACVS & ECVS

    Corresponding author
    1. Biomedical Research and Clinical Trials Unit, University Veterinary Teaching Hospital, University of Sydney, Camden, Australia
    • Corresponding Author

      Andrew Dart, BVSc, PhD, Dip ACVS & ECVS, Research and Clinical Training Unit, University Veterinary Teaching Hospital Camden, University of Sydney, PMB 4, Narellan Delivery Centre, Camden, NSW 2567, Australia

      E-mail: andrewd@camden.usyd.edu.au

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Abstract

Objectives

To evaluate the effect of 3 laryngeal prostheses alone or in combination on rima glottidis area in horses.

Study Design

Experimental randomized design.

Sample Population

Cadaveric equine larynges (n = 22).

Methods

Three prostheses were preplaced in each of 14 larynges. Rima glottidis area was measured after loading each suture in 5 Newton (N) increments from 0 N to 35 N. In 8 larynges, the 3 prostheses were tied alone or in combination at a fixed load of 15 N and rima glottidis area measured.

Results

Rima glottidis cross-sectional area increased as the load on each prosthesis increased with maximum area reached at 20 N for each prosthesis. At a fixed load of 15 N, tying 2 and 3 prostheses in combination resulted in a larger rima glottidis cross-sectional area than achieved with each prosthesis alone.

Conclusions

A combination of 2 or 3 prostheses tied at a fixed load of 15 N optimized rima glottidis cross-sectional area irrespective of the anatomic location of the prosthesis.

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