Effect of age and prostheses location on rima glottidis area in equine cadaveric larynges.

OBJECTIVE To determine the effect of horse age and laryngeal prosthesis location on rima glottidis area in cadaveric larynges. STUDY DESIGN Experimental study. ANIMALS Cadaveric equine larynges (n = 40). METHODS Specimens were grouped by age: group 1, ≤5 years (n = 18); group 2, >5 to ≤10 years (n = 12); group 3, >10 years (n = 10). A cranial prosthesis was placed through the dorsal cricoid spine at 70% of the distance of the total cricoid length measured from the caudal rim. A dorsal prosthesis was placed through the caudal rim of the cricoid on the dorsal midline. A lateral prosthesis was placed 1.5 cm lateral to the dorsal prosthesis. All prostheses passed through the muscular process. Rima glottidis area was determined after progressively tightening each suture in 5 N increments from 0 N to 35 N using a tensiometer. RESULTS There was no significant effect of age on the area of the rima glottidis at any load for any of the three prosthesis locations. CONCLUSIONS Age did not affect the area of the rima glottidis when prostheses were loaded between 5 N and 35 N.

[1]  A. Dart,et al.  Optimal tension, position, and number of prostheses required for maximum rima glottidis area after laryngoplasty. , 2013, Veterinary surgery : VS.

[2]  T. Witte,et al.  Equine laryngoplasty sutures undergo increased loading during coughing and swallowing. , 2010, Veterinary surgery : VS.

[3]  T. Pfau,et al.  Three-dimensional biomechanics of simulated laryngeal abduction in horses. , 2010, American journal of veterinary research.

[4]  J. Carmalt,et al.  Induration of the cricoid cartilage complicates prosthetic laryngoplasty in a horse. , 2010, Veterinary surgery : VS.

[5]  P. Dixon,et al.  Postoperative race performance is not correlated with degree of surgical abduction after laryngoplasty in National Hunt Thoroughbred racehorses. , 2009, Veterinary surgery : VS.

[6]  A. Dart,et al.  Effect of prosthesis number and position on rima glottidis area in equine laryngeal specimens. , 2009, Veterinary surgery : VS.

[7]  N. E. Robinson,et al.  Effect of magnitude and direction of force on laryngeal abduction: implications for the nerve-muscle pedicle graft technique. , 2009, Equine veterinary journal.

[8]  A. Datta,et al.  Implications of different degrees of arytenoid cartilage abduction on equine upper airway characteristics. , 2008, Equine veterinary journal.

[9]  H. Garvin.  Ossification of Laryngeal Structures as Indicators of Age * , 2008, Journal of forensic sciences.

[10]  J. Hermanson,et al.  Neuroanatomy of the equine dorsal cricoarytenoid muscle: surgical implications. , 2008, Equine veterinary journal.

[11]  B. McGorum,et al.  Long-term survey of laryngoplasty and ventriculocordectomy in an older, mixed-breed population of 200 horses. Part 1: Maintenance of surgical arytenoid abduction and complications of surgery. , 2010, Equine veterinary journal.

[12]  D. Slone,et al.  Treatment of laryngeal hemiplegia in horses by prosthetic laryngoplasty, ventriculectomy and vocal cordectomy , 2002, Veterinary Record.

[13]  J. R. Mcclure,et al.  Career racing performance in Thoroughbreds treated with prosthetic laryngoplasty for laryngeal neuropathy: 52 cases (1981-1989). , 2000, Journal of the American Veterinary Medical Association.

[14]  M. Ross,et al.  Laryngoplasty with or without ventriculectomy for treatment of left laryngeal hemiplegia in 230 racehorses. , 1997, Veterinary surgery : VS.

[15]  Y. Benjamini,et al.  Controlling the false discovery rate: a practical and powerful approach to multiple testing , 1995 .

[16]  J. Schumacher,et al.  Effects of age and prosthesis material on in vitro cartilage retention of laryngoplasty prostheses in horses. , 1990, American journal of veterinary research.

[17]  P. Orsini,et al.  Xeroradiographic evaluation of the equine larynx. , 1989, American journal of veterinary research.

[18]  B. Goulden,et al.  Equine laryngeal hemiplegia. Part III. Treatment by laryngoplasty. , 1982, New Zealand veterinary journal.

[19]  P. Roughley,et al.  Age-related changes in the structure of the proteoglycan subunits from human articular cartilage. , 1980, The Journal of biological chemistry.

[20]  C. Boles.  Treatment of upper airway abnormalities. , 1979, The Veterinary clinics of North America. Large animal practice.

[21]  J. Leslie,et al.  Use of a prosthetic device for surgical correction of laryngeal hemiplegia in horses. , 1970, Journal of the American Veterinary Medical Association.