Surgical advancement of the larynx (laryngeal tie-forward) as a treatment for dorsal displacement of the soft palate in horses: a prospective study 2001-2004

Summary Reasons for performing study: Correct placement of sutures (‘laryngeal tie‐forward’) in experimentally created dorsal displacement of the soft palate (DDSP) has been observed to replace the function of the thyrohyoideus muscles and prevent DDSP. Hypothesis: The ‘laryngeal tie‐forward’ proced...

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Veröffentlicht in:Equine veterinary journal Jg. 37; H. 5; S. 418 - 423
Hauptverfasser: Woodie, J.B, Ducharme, N.G, Kanter, P, Hackett, R.P, Erb, H.N
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Oxford, UK Blackwell Publishing Ltd 01.09.2005
Schlagworte:
abnormalities
Animals
dorsal displacement of soft palate
dynamic airway obstruction
endoscopy
exercise
Exercise Test
Exercise Test - veterinary
Female
Follow-Up Studies
horse
horse diseases
Horse Diseases - surgery
Horses
larynx
Larynx - abnormalities
Larynx - surgery
Male
palate
Palate, Soft
Palate, Soft - abnormalities
Palate, Soft - surgery
Physical Conditioning, Animal
Physical Conditioning, Animal - physiology
physiology
Prospective Studies
racehorses
racing performance
radiography
respiratory obstruction
Respiratory System Abnormalities
Respiratory System Abnormalities - surgery
Respiratory System Abnormalities - veterinary
respiratory tract diseases
surgery
suture techniques
sutures
treatment
Treatment Outcome
veterinary
ISSN:0425-1644, 2042-3306
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Zusammenfassung:Summary Reasons for performing study: Correct placement of sutures (‘laryngeal tie‐forward’) in experimentally created dorsal displacement of the soft palate (DDSP) has been observed to replace the function of the thyrohyoideus muscles and prevent DDSP. Hypothesis: The ‘laryngeal tie‐forward’ procedure would prevent or delay the occurrence of DDSP during exercise in horses with naturally occurring DDSP and therefore improve performance. Methods: A clinical population (n = 116), mainly of racehorses was presented for treatment of naturally occurring exercise‐induced DDSP. All horses underwent the ‘laryngeal tie‐forward’ procedure. The relative position of the thyroid and cricoid cartilage in relation to the caudal aspect of the basihyoid bone was recorded; follow‐up was obtained by telephone communication with trainers, owners and/or referring veterinarians. In addition, a performance index and earnings were determined using race records. Results: Preoperatively, the median distance between the caudal aspect of the basihyoid bone and rostral aspect of the thyroid cartilage was 3.5 cm. Post operatively, the thyroid cartilage was moved a median distance of 4 cm rostrally and the larynx was shown to be in a position more rostral and dorsal than in preoperative radiographs. Of 98 horses for which follow‐up was available, the performance of 87% was classified as improved, 12% as unchanged and 2% as worse. In 20 horses in which the diagnosis had been confirmed by treadmill videoendoscopy, 80% had a significantly increased performance index and earnings (P = 0.007). For the entire population, there was a significant improvement in performance index and earnings after surgery (82%) (P = 0.0001). Conclusions: Placing the larynx in a more rostral and dorsal position may have improved the performance in 80–82% of the horses affected with naturally‐occurring DDSP. Potential relevance: ‘Laryngeal tie‐forward’ is a surgical technique that has a measurable effect on the position of the larynx and offers an alternative therapy for treating horses affected with DDSP. More experience may be needed with this technique prior to its widespread use in horses with a clinical diagnosis of DDSP.
Bibliographie:istex:1769A7E3D028DACF1A5038B652CCC31AE275AAA8
ark:/67375/WNG-7XH9FS5P-L
ArticleID:EVJ299
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0425-1644
2042-3306
DOI:10.2746/042516405774480076