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Epiglottic augmentation in the horse.

E Tulleners1, P Mann, C W Raker

  • 1Department of Clinical Studies, University of Pennsylvania, School of Veterinary Medicine, Kennett Square.

Veterinary Surgery : VS
|May 1, 1990
PubMed
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Injectable bovine collagen and cartilage grafts were used for equine epiglottic augmentation. Collagen implants persisted, causing thickening, while cartilage grafts showed poor incorporation in this equine study.

Area of Science:

  • Veterinary Surgery
  • Equine Medicine
  • Laryngeal Surgery

Background:

  • Epiglottic abnormalities can affect equine upper airway function.
  • Surgical augmentation techniques aim to improve epiglottic structure and function.
  • Injectable materials and cartilage grafts are potential options for epiglottic augmentation.

Purpose of the Study:

  • To evaluate the efficacy and outcomes of epiglottic augmentation in horses using injectable bovine collagen or auricular cartilage grafts.
  • To assess the short-term effects and tissue reactions associated with these augmentation materials.

Main Methods:

  • Twelve horses with normal epiglottises underwent augmentation with either bovine collagen or autogenous/allogenous auricular cartilage.
  • Procedures were assessed via endoscopy and radiography.

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  • Histopathological examination was performed post-euthanasia at various time points.

    • Main Results:

    • Grafting procedures were technically straightforward with no apparent discomfort.
    • Collagen implants remained visible as submucosal bulges; cartilage grafts showed poor incorporation.
    • Histopathology revealed a foreign body reaction to collagen and submucosal fibrosis causing thickening, particularly with collagen implants.
    • Pharyngeal lymphoid hyperplasia was noted with cartilage grafts but not collagen.

    Conclusions:

    • Injectable bovine collagen and cartilage grafts can be used for equine epiglottic augmentation.
    • Collagen implants persist and induce a foreign body reaction leading to thickening.
    • Cartilage grafts demonstrate poor incorporation and may cause lymphoid hyperplasia.