• 1. White RAS. Unilateral arytenoid lateralization: an assessment of technique and long term results in 62 dogs with laryngeal paralysis. J Small Anim Pract 1989; 30:543549.

    • Search Google Scholar
    • Export Citation
  • 2. MacPhail CM, Monnet E. Outcome of and postoperative complications in dogs undergoing surgical treatment of laryngeal paralysis: 140 cases (1985–1998). J Am Vet Med Assoc 2001;218:19491956.

    • Search Google Scholar
    • Export Citation
  • 3. Jeffery ND, Talbot CE, Smith PM, et al. Acquired idiopathic laryngeal paralysis as a prominent feature of generalized neuromuscular disease in 39 dogs. Vet Rec 2006; 158:1721.

    • Search Google Scholar
    • Export Citation
  • 4. MacPhail CM, Monnet E. Laryngeal diseases. In: Kirk RW, ed. Current veterinary therapy. 14th ed. Philadelphia: WB Saunders Co, 2009;627630.

    • Search Google Scholar
    • Export Citation
  • 5. Thieman KM, Krahwinkel DJ, Sims MH, et al. Histopathological confirmation of polyneuropathy in 11 dogs with laryngeal paralysis. J Am Anim Hosp Assoc 2010; 46:161167.

    • Search Google Scholar
    • Export Citation
  • 6. Braund KG, Steinberg HS, Shores A, et al. Laryngeal paralysis in immature and mature dogs as one sign of a more diffuse poly-neuropathy. J Am Vet Med Assoc 1989; 194:17351740.

    • Search Google Scholar
    • Export Citation
  • 7. Stanley BJ, Hauptman JG, Fritz MC, et al. Esophageal dysfunction in dogs with idiopathic laryngeal paralysis: a controlled cohort study. Vet Surg 2010; 39:139149.

    • Search Google Scholar
    • Export Citation
  • 8. Snelling SR, Edwards GA. A retrospective study of unilateral arytenoid lateralization in the treatment of laryngeal paralysis in 100 dogs (1992–2000). Aust Vet J 2003;81:464468.

    • Search Google Scholar
    • Export Citation
  • 9. Schofield DM, Norris J, Sadanaga KK. Bilateral thyroarytenoid cartilage lateralization and vocal fold excision with mucosoplasty for treatment of idiopathic laryngeal paralysis: 67 dogs (1998–2005). Vet Surg 2007;36:519525.

    • Search Google Scholar
    • Export Citation
  • 10. Hammel SP, Hottinger HA, Novo RE. Postoperative results of unilateral arytenoid lateralization for treatment of idiopathic laryngeal paralysis in dogs: 39 cases (1996–2002). J Am Vet Med Assoc 2006;228:12151220.

    • Search Google Scholar
    • Export Citation
  • 11. Griffiths LG, Sullivan M, Reid SW. A comparison of the effects of unilateral thyroarytenoid lateralization versus cricoarytenoid laryngoplasty on the area of the rima glottidis and clinical outcome in dogs with laryngeal paralysis. Vet Surg 2001; 30:359365.

    • Search Google Scholar
    • Export Citation
  • 12. Bahr KL, Howe L, Jessen C, et al. Outcome of 45 dogs with laryngeal paralysis treated by unilateral arytenoid lateralization or bilateral ventriculocordectomy. J Am Anim Hosp Assoc 2014; 50:264272.

    • Search Google Scholar
    • Export Citation
  • 13. Wilson D, Monnet E. Risk factors for the development of aspiration pneumonia after unilateral arytenoid lateralization in dogs with laryngeal paralysis: 232 cases (1987–2012). J Am Vet Med Assoc 2016;248:188194.

    • Search Google Scholar
    • Export Citation
  • 14. Bureau S, Monnet E. Effects of suture tension and surgical approach during unilateral arytenoid lateralization on the rima glottidis in the canine larynx. Vet Surg 2002; 31:589595.

    • Search Google Scholar
    • Export Citation
  • 15. Greenberg MJ, Bureau S, Monnet E. Effects of suture tension during unilateral cricoarytenoid lateralization on canine laryngeal resistance in vitro. Vet Surg 2007; 36:526532.

    • Search Google Scholar
    • Export Citation
  • 16. Gauthier CM, Monnet E. In vitro evaluation of anatomic landmarks for the placement of suture to achieve effective arytenoid cartilage abduction by means of unilaterally cricoarytenoid lateralization in dogs. Am J Vet Res 2014; 75:602606.

    • Search Google Scholar
    • Export Citation
  • 17. Holt D, Harvey CE. Idiopathic laryngeal paralysis: results of treatment by bilateral ventriculocordectomy in 40 dogs. J Am Vet Med Assoc 1994; 30:389395.

    • Search Google Scholar
    • Export Citation
  • 18. Zikes C, McCarthy T. Bilateral ventriculocordectomy via ventral laryngotomy for idiopathic laryngeal paralysis in 88 dogs. J Am Anim Hosp Assoc 2012; 48:234244.

    • Search Google Scholar
    • Export Citation
  • 19. Alsup JC, Greenfield CL, Hungerford LL, et al. Comparison of unilateral arytenoid lateralization and ventral ventriculocordectomy for the treatment of experimentally induced laryngeal paralysis in dogs. Can Vet J 1997; 38:287293.

    • Search Google Scholar
    • Export Citation
  • 20. Cabano NR, Greenberg MJ, Bureau S, et al. Effects of bilateral arytenoid cartilage stenting on canine laryngeal resistance ex vivo. Vet Surg 2011; 40:97101.

    • Search Google Scholar
    • Export Citation
  • 21. Wignall JR, Baines SJ. Effects of unilateral arytenoid lateralization technique and suture tension on airway pressure in the larynx of canine cadavers. Am J Vet Res 2012; 73:917924.

    • Search Google Scholar
    • Export Citation
  • 22. Rozanski EA, Greenfield CL, Alsup JC, et al. Measurement of upper airway resistance in awake untrained dolichocephalic and mesaticephalic dogs. Am J Vet Res 1994; 55:10551059.

    • Search Google Scholar
    • Export Citation
  • 23. Bedenice D, Rozanski EA, Bach J, et al. Canine awake head-out plethysmography (HOP): characterization of external resistive loading and spontaneous laryngeal paralysis. Respir Physiol Neurobiol 2006; 151:6173.

    • Search Google Scholar
    • Export Citation
  • 24. Mehl ML, Kyles AE, Pypendop BH, et al. Outcome of laryngeal web resection with mucosal apposition for treatment of airway obstruction in dogs: 15 cases (1992–2006). J Am Vet Med Assoc 2008;233:738742.

    • Search Google Scholar
    • Export Citation
  • 25. Harvey CE. Partial laryngectomy in the dog—healing and swallowing function in normal dogs. Vet Surg 1983; 12:192196.

  • 26. Ross JT, Matthiesen KN, Scavelli T. Complications and long-term results after partial laryngectomy for the treatment of idiopathic laryngeal paralysis in 45 dogs. Vet Surg 1991; 20:169173.

    • Search Google Scholar
    • Export Citation
  • 27. Trout NJ, Harpster NK, Berg J, et al. Long-term results of unilateral ventriculocordectomy and partial arytenoidectomy for the treatment of laryngeal paralysis in 60 dogs. J Am Anim Hosp Assoc 1994; 30:401407.

    • Search Google Scholar
    • Export Citation

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Effect of bilateral ventriculocordectomy via ventral laryngotomy on laryngeal airway resistance in larynges of canine cadavers

Penny J. Regier DVM1, Timothy C. McCarthy DVM, PhD2, and Eric Monnet DVM, PhD3
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  • 1 Department of Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO 80523.
  • | 2 VetMIST/Cascade Veterinary Referral Center, 11140 SW 68th Pkwy, Tigard, OR 97223.
  • | 3 Department of Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO 80523.

Abstract

OBJECTIVE To evaluate the effect of bilateral ventriculocordectomy via ventral laryngotomy on laryngeal airway resistance (LAR) in canine cadaver larynges.

SAMPLE 6 clinically normal canine cadaver larynges.

PROCEDURES LAR was determined for each specimen before (baseline) and after bilateral ventriculocordectomy with the epiglottis open and closed. After ventral laryngotomy was performed, the vocal cords were sharply excised, and the incised mucosal edges were apposed with 4-0 glycomer 631 suture in a simple continuous pattern. The thyroid cartilage was apposed with 3-0 polypropylene suture in a simple continuous pattern.

RESULTS With the epiglottis closed, baseline median LAR was 27.6 cm H2O/L/s (range, 21.2 to 30.6 cm H2O/L/s), which did not differ significantly from the median LAR after bilateral ventriculocordectomy (24.7 cm H2O/L/s [range, 20.6 to 27.7 cm H2O/L/s]). With the epiglottis open, baseline median LAR was 7.3 cm H2O/L/s (range, 5.4 to 7.8 cm H2O/L/s), which did not differ significantly from the median LAR after bilateral ventriculocordectomy (7.2 cm H2O/L/s [range, 6.6 to 7.6 cm H2O/L/s]).

CONCLUSIONS AND CLINICAL RELEVANCE Bilateral ventriculocordectomy did not affect LAR with an open epiglottis in canine cadaver larynges. Therefore, it may not be an effective treatment for laryngeal paralysis. It also did not affect LAR with a closed epiglottis, which may indicate protection against aspiration pneumonia.

Contributor Notes

Address correspondence to Dr. Monnet (eric.monnet@colostate.edu).