References

Anderson JD, Tulleners EP, Johnston JK, Reeves MJ. Sternothyrohyoideus myectomy or staphylectomy for treatment of intermittent dorsal displacement of the soft palate in racehorses: 209 cases (1986-1991). J Am Vet Med Assoc. 1995; 206:(12)1909-1912

Barakzai SJ, Parkin TDH, Cramp P. Overground endoscopic findings and respiratory sound analysis in horses with recurrent laryngeal neuropathy after unilateral laser ventriculocordectomy. Equine Vet J. 2019; 51:(2)185-191

Beroza GA. Partial closure of laryngotomies in horses. J Am Vet Med Assoc. 1994; 204:(8)1227-1229

Brown JA, Derksen FJ, Stick JA, Hartmann WM, Robinson NE. Laser vocal cordecto-my fails to effectively reduce respiratory noise in horses with laryngeal hemiplegia. Vet Surg. 2005; 34:(3)247-252 https://doi.org/10.1111/j.1532-950X.2005.00037.x

Cramp P, Derksen FJ, Stick JA, Nickels FA, Brown KE, Robinson P, Robinson NE. Effect of ventriculectomy versus ventriculocordectomy on upper airway noise in draught horses with recurrent laryngeal neuropathy. Equine Vet J. 2009; 41:(8)729-734 https://doi.org/10.2746/042516409X434099

Draper ACE, Piercy RJ. Pathological classification of equine recurrent laryngeal neuropathy. J Vet Intern Med. 2018; 32:(4)1397-1409

Ducharme NG. Pharynx. In: Auer JA, Stick JA (eds). Philadelphia: Elsevier; 2012

Fulton IC, Anderson BH, Stick JA. Philadelphia. Larynx. In: Auer JA, Stick JA (editors). : Elsevier; 2012

Fulton IC, Derksen FJ, Stick JA, Robinson NE, Walshaw R. Treatment of left laryngeal hemiplegia in standardbreds, using a nerve muscle pedicle graft. Am J Vet Res. 1991; 52:(9)1461-1467

Gray SM, Gutierrez-Nibeyro SD, Secor EJ. Partial arytenoidectomy in 14 standing horses (2013-2017). Vet Surg. 2019; 48:(4)473-480 https://doi.org/10.1111/vsu.13192

Henderson CE, Sullins KE, Brown JA. Transendoscopic, laser-assisted ventriculocordectomy for treatment of left recurrent laryngeal hemiplegia in horses: 22 cases (1999–2005). J Am Vet Med Assoc. 2007; 231:(12)1868-72 https://doi.org/10.2460/javma.231.12.1868

King DS, Tulleners EP, Martin BB Clinical experiences with axial deviation of the aryepliglottic folds in 52 racehorses. Vet Surg. 2001; 30:(2)151-60 https://doi.org/10.1053/jvet.2001.21389

Lacourt M, Marcoux M. Treatment of epiglottic entrapment by transnasal axial division in standing sedated horses using a shielded hook bistoury. Vet Surg. 2011; 40:(3)299-304 https://doi.org/10.1111/j.1532-950x.2010.00781.x

Perkins JD, Hughes TK, Brain B. Endoscope-guided, transoral axial division of an entrapping epiglottic fold in fifteen standing horses. Vet Surg. 2007; 36:(8)800-3 https://doi.org/10.1111/j.1532-950x.2007.00340.x

Rakesh V, Ducharme NG, Datta AK. Development of equine upper airway fluid mechanics model for Thoroughbred racehorses. Equine Vet J. 2008; 40:(3)272-9 https://doi.org/10.2746/042516408X281216

Rakestraw PC, Hackett RP, Ducharme NG. Arytenoid cartilage movement in resting and exercising horses. Vet Surg. 1991; 20:(2)122-7 https://doi.org/10.1111/j.1532-950x.1991.tb00319.x

Rossignol F, Brandenberger O, Perkins JD, Marie JP, Mespoulhès-Rivière C, Ducharme NG. Modified first or second cervical nerve transplantation technique for the treatment of recurrent laryngeal neuropathy in horses. Equine Vet J. 2018; 50:(4)457-464

Taylor SE, Barakzai SZ, Dixon P. Ventriculocordectomy as the sole treatment for recurrent laryngeal neuropathy: long-term results from ninety-two horses. Vet Surg. 2006; 35:(7)653-657 https://doi.org/10.1111/j.1532-950x.2006.00203.x

Standing upper airway surgery: what can be done?

02 May 2021
11 mins read
Volume 5 · Issue 3
Figure 8. Standing ventriculocordectomy via a laryngotomy a) laryngotomy incision b) general positioning for the procedure c) intraoperative picture of the forceps grasping the everted ventricle.
Figure 8. Standing ventriculocordectomy via a laryngotomy a) laryngotomy incision b) general positioning for the procedure c) intraoperative picture of the forceps grasping the everted ventricle.

Abstract

Performing a number of different upper respiratory tract surgeries in the standing sedated horse is advantageous because it improves accessibility and the anatomy is in a more appropriate location. Standing surgery avoids the risk of general anaesthesia, affording a significant advantage to the horse and owner. However, this has to be weighed up against the increased risk of performing surgery in the standing sedated horse to the surgeon and the rest of the surgery team. Often, specialist facilities and equipment are required as well as a more in-depth knowledge of the anatomy and the procedure, along with a move advanced skill set. This article describes the procedures of upper airway surgery that lend themselves to being performed in the standing sedated horse.

Performing many different upper respiratory tract surgeries in the standing sedated horse is advantageous. The accessibility to the head is improved, the anatomy is in the appropriate position and the visibility is superior, not to mention the added benefit of avoiding the risks of general anaesthesia. The ability to flex, extend and move the head and neck to the left and right facilitates improved accessibility. While this may be appealing to the surgeon and the owner, it often requires specialist equipment and always requires attention to detail, with meticulous planning and careful dissection with very little room for error. Table 1 outlines the standing sedation protocol that used by the author, which has been found to be most effective.

This article describes a selection of diseases that can be treated with standing upper airway procedures, focusing on those associated with the larynx, pharynx and soft palate.

This occurs when the aryepiglottic membrane envelopes the rostral aspect of the epiglottis (Figure 1). The treatment for this is to transect the membrane to release the entrapped epiglottis; there are a number of ways to do this.

Register now to continue reading

Thank you for visiting UK-VET Equine and reading some of our peer-reviewed content for veterinary professionals. To continue reading this article, please register today.