Association of owner‐reported noise with findings during dynamic respiratory endoscopy in Thoroughbred racehorses

Witte, Stefan; Witte, Thomas; Harriss, F.; Kelly, G.; Pollock, Patrick

doi:10.1111/j.2042-3306.2010.00152.x

Cited by 25 publications

(28 citation statements)

References 34 publications

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“…These results are comparable with studies in similar populations overseas where dynamic obstruction was identified in 65% -77% of horses (Dart et al 2001;Davidson et al 2011;Desmaizieres et al 2009;Franklin, Naylor & Lane 2006;Witte et al 2011).…”

Section: Discussionsupporting

confidence: 86%

“…Dynamic endoscopy in similar populations has detected this in approximately 8% -40% of horses (Allen & Franklin 2010;Barakzai & Dixon 2011;Dart et al 2001;Desmaizieres et al 2009;Tan et al 2005). Dorsal displacement of the soft palate was also one of the most commonly detected abnormalities in the present study (25%) (Figure 7), similar to the proportion of horses reported with DDSP in comparative populations: 19% (Pollock et al 2009), 26% (Witte et al 2011) and28% (Desmaizieres et al 2009). …”

Section: Discussionsupporting

confidence: 83%

“…Potential disadvantages of DOE are that the examiner has less control of the exact exercise protocol and equipment-related problems (Barakzai 2012). Several studies have reported findings of DOE in populations of horses in Europe (Allen & Franklin 2010;Desmaizieres et al 2009;Franklin et al 2008;Pollock et al 2009;Witte et al 2011). To date, there are no studies reporting on the use of DOE in Thoroughbred racehorses in South Africa.…”

Section: Read Onlinementioning

confidence: 99%

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Dynamic upper respiratory abnormalities in Thoroughbred racehorses in South Africa

Mirazo¹,

Page²,

Rubio‐Martínez³

et al. 2014

J S Afr Vet Assoc

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Upper airway endoscopy at rest has been the diagnostic method of choice for equine upper respiratory tract (URT) conditions. Development of high-speed treadmill endoscopy improved the sensitivity of URT endoscopy by allowing observation of the horse’s nasopharynx and larynx during exercise. However, treadmill exercise may not always accurately represent the horse’s normal exercise as track surface, rider, tack and environmental variables are altered. Recently, the development of dynamic overground endoscopy (DOE) has addressed some of these shortcomings. A retrospective study was undertaken to describe the URT abnormalities detected during DOE in racehorses presenting with poor performance and/or abnormal respiratory noise. Patient records of Thoroughbred racehorses undergoing DOE from November 2011 to August 2012 were reviewed. Data collected included signalment, primary complaint, distance exercised, maximum speed and dynamic airway abnormalities detected. Fifty-two horses underwent DOE for investigation of poor performance and/or abnormal respiratory noise. The main abnormalities detected included axial deviation of the aryepiglottic folds (40%), vocal cord collapse (35%), abnormal arytenoid function (33%) and dorsal displacement of the soft palate (25%). A total of 40 horses were diagnosed with one or more abnormalities of the URT (77%). Fifteen horses (29%) had a single abnormality and 25 horses (48%) had multiple abnormalities. This study showed that DOE is a useful technique for investigating dynamic disorders of the URT in racehorses in South Africa. The total number and type of dynamic pathological conditions were comparable with those identified in similar populations in other geographical locations.

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Section: Discussionsupporting

confidence: 86%

Section: Discussionsupporting

confidence: 83%

Section: Read Onlinementioning

confidence: 99%

See 1 more Smart Citation

Dynamic upper respiratory abnormalities in Thoroughbred racehorses in South Africa

Mirazo¹,

Page²,

Rubio‐Martínez³

et al. 2014

J S Afr Vet Assoc

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show abstract

“…. ADAF often occurs with other forms of airway obstruction, most commonly DDSP . Unlike in man, the equine aryepiglottic fold contains no muscular component and relies on the position of 2 surrounding structures (arytenoid and epiglottic cartilages) for tension and support .…”

Section: Discussionmentioning

confidence: 99%

Long‐term exercising video‐endoscopic examination of the upper airway following laryngoplasty surgery: A prospective cross‐sectional study of 41 horses

Barnett

O’Leary

Parkin

et al. 2013

Equine Veterinary Journal

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“…Other studies have shown significantly lower values (44 -86 % with obstruction) (Morris and Seeherman 1990, Stick et al 1992, Kannegieter and Dore 1995, Tan et al 2005, Witte et al 2011. This can clearly be explained by the evaluation of all findings in the area of the vocal folds (VFD).…”

Section: Horses With Abnormal Respiratory Noisementioning

confidence: 93%

Frequencies of dynamic obstructions of the upper respiratory tract in 135 Thoroughbreds during on-board exercise endoscopy

Oellers¹,

Barton²,

Ohnesorge³

2018

PHK

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Summary:The frequencies of dynamic obstructions in thoroughbreds were investigated by performing on-board exercise endoscopy in 135 horses. 17 of these horses showed abnormal respiratory noise only and 35 solely poor performance. In 39 cases, both was reported. In addition, 44 horses underwent endoscopy without any clinical signs. In all of 56 horses that exhibited an audible abnormal respiratory noise, an obstruction of the upper respiratory tract was present. Overall, dynamic upper airway obstructions were detected in 72.6 % (98/135). The most commonly diagnosed obstruction was axial deviation of the aryepiglottic fold (ADAF) in 55.1% of horses (54/98). 24.4 % (24/98) showed palatal instability (PI), 30.6 % (30/98) dorsal displacement of the soft palate (DDSP) and 11.2 % (11/98) arytenoid cartilage collapse (ACC). Furthermore, 53.1% (52/98) of horses had abnormalities in the area of the vocal folds. Of these horses, 13 had unilateral or bilateral vocal cord collapse (VCC) and 8 displayed vibration of the vocal cords. 31 horses showed axial deviation in the area of the caudal vocal fold (ADPV) as a sole abnormality. By the new description of these ADPV, the origin of the abnormal respiratory noise in a further proportion of horses could be explained. Including ADPV, an obstruction of the upper airways was observed in all horses (100 %) with specified abnormal respiratory noise. If only horses with long or continuous (> 8 sec) DDSP were taken into account, abnormal respiratory noise was audible in 93.3 % and poor performance was present in 73.3 %. It can thus be assumed that horses with DDSP requiring treatment are clinically apparent either with abnormal respiratory noise or poor performance. Furthermore, it was demonstrated, that in 52.3% of horses without poor performance or abnormal respiratory noise an dynamic upper airway obstruction was identified.

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Association of owner‐reported noise with findings during dynamic respiratory endoscopy in Thoroughbred racehorses

Abstract: DRE should be performed in horses with abnormal respiratory noise to rule out complex conditions of the upper portion of the respiratory tract.

Cited by 25 publications

References 34 publications

Dynamic upper respiratory abnormalities in Thoroughbred racehorses in South Africa

Dynamic upper respiratory abnormalities in Thoroughbred racehorses in South Africa

Long‐term exercising video‐endoscopic examination of the upper airway following laryngoplasty surgery: A prospective cross‐sectional study of 41 horses

Frequencies of dynamic obstructions of the upper respiratory tract in 135 Thoroughbreds during on-board exercise endoscopy

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