Telemetric analysis of breathing pattern variability in recurrent airway obstruction (heaves)-affeeted horses

Behan, Ashley; Hauptman, Joe G.; Robinson, N. E.

doi:10.2460/ajvr.74.6.925

Cited by 6 publications

(7 citation statements)

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“…The ratio of time to reach peak expiratory flow to expiratory time (Tpef/Te) has been used to differentiate and characterise airflow obstruction in children and infants during forced expiratory breaths [21, 22] and tidal breathing [23]. As biphasic respiration, characteristic of healthy horses, is lost with obstructive conditions [24, 25], characterisation of relative flow values may prove helpful in equine patients. It has been proposed that relative flow-time relationships can indicate lower airway disease and negate the need to use maximal forced inspirations and expirations in horses [18], and the assessment of relative flow-time relationships has been used to demonstrate potential airflow limitations in horses with increased tracheal wash neutrophil percentages [26].…”

Section: Introductionmentioning

confidence: 99%

Reliability of breath by breath spirometry and relative flow-time indices for pulmonary function testing in horses

et al. 2016

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BackgroundRespiratory problems are common in horses, and are often diagnosed as a cause of poor athletic performance. Reliable, accurate and sensitive spirometric tests of airway function in resting horses would assist with the diagnosis of limitations to breathing and facilitate investigations of the effects of various treatments on breathing capacity. The evaluation of respiratory function in horses is challenging and suitable procedures are not widely available to equine practitioners. The determination of relative flow or flow-time measures is used in paediatric patients where compliance may limit conventional pulmonary function techniques. The aim of the current study was to characterise absolute and relative indices of respiratory function in healthy horses during eupnoea (tidal breathing) and carbon dioxide (CO2)-induced hyperpnoea (rebreathing) using a modified mask pneumotrachographic technique well suited to equine practice, and to evaluate the reliability of this technique over three consecutive days. Coefficients of variation, intra-class correlations, mean differences and 95% confidence intervals across all days of testing were established for each parameter.ResultsThe technique provided absolute measures of respiratory function (respiratory rate, tidal volume, peak inspiratory and expiratory flows, time to peak flow) consistent with previous studies and there was no significant effect of day on any measure of respiratory function. Variability of measurements was decreased during hyperpnea caused by rebreathing CO2, but a number of relative flow-time variables demonstrated good agreement during eupnoeic respiration.ConclusionsThe technique was well tolerated by horses and study findings suggest the technique is suitable for evaluation of respiratory function in horses. The use of relative flow-time variables provided reproducible (consistent) results, suggesting the technique may be of use for repeated measures studies in horses during tidal breathing or rebreathing.Electronic supplementary materialThe online version of this article (doi:10.1186/s12917-016-0893-3) contains supplementary material, which is available to authorized users.

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Section: Introductionmentioning

confidence: 99%

Reliability of breath by breath spirometry and relative flow-time indices for pulmonary function testing in horses

et al. 2016

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“…Airway function was monitored by daily ΔPplmax measurement and by continuous use of RIP for BFV calculations . Throughout the sampling period, blood was collected every 6 h from an indwelling i.v.…”

Section: Methodsmentioning

confidence: 99%

“…The clinical signs that occur when horses affected with recurrent airway obstruction (RAO) are housed in an organic dust rich environment are a consequence of airway obstruction resulting from airway inflammation . The onset and progression of airway obstruction can be monitored by measurement of the maximal change in pleural pressure (ΔPplmax) and breathing frequency variability (BFV) by respiratory inductance plethysmography (RIP) . The latter measures breathing pattern and has detected reduced BFV within 6 h of stabling RAO‐affected horses .…”

Section: Introductionmentioning

confidence: 99%

“…The onset and progression of airway obstruction can be monitored by measurement of the maximal change in pleural pressure (ΔPplmax) and breathing frequency variability (BFV) by respiratory inductance plethysmography (RIP) . The latter measures breathing pattern and has detected reduced BFV within 6 h of stabling RAO‐affected horses . Pulmonary inflammation in RAO‐affected horses also occurs within 6 h of stabling , involves both the innate and adaptive (Th2) immune system and leads to neutrophil influx into the lung.…”

Section: Introductionmentioning

confidence: 99%

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Plasma cortisol concentration increases within 6 hours of stabling inRAO‐affected horses

Shaba

Braman

Robinson

2013

Equine Veterinary Journal

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“…In the horse the thoracic band is placed in the 11 th intercostal space, which was also feasible with donkeys. Some authors prefer to position the thoracic band in the 6 th intercostal space accepting small excursions of the thorax thereby offering larger excursion for specify [23] .…”

Section: Discussionmentioning

confidence: 99%

Eşeklerde Solunum Ultrason Pletismografisinin Gözlemlenmesi Üzerine Bir Çalışma

Güngör¹,

Hoven²

2017

Kafkas Univ Vet Fak Derg

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Citation of This ArticleGüngör O, van den Hoven R: A study on observation of respiratory ultrasound plethysmography in donkeys. Kafkas Univ Vet Fak Derg, 23 (5): 797-801, 2017797-801, . DOI: 10.9775/kvfd.2017 AbstractThe respiratory efforts of the thorax and abdominal muscles of donkeys have not adequately been quantified. According to our knowledge, there is no objective, non-invasive monitoring system of lung mechanics in donkeys. This study is the first to describe the nature of thoracoabdominal asynchrony in donkeys. From 22 June 2016 to 19 January 2017 in turn all donkeys (n=18) owned by the Schlosshof GmbH were used for this study. The aim of this study was to analyse the differences of thoracic and abdominal excursions during breathing by using Respiratory Ultrasound Plethysmography (RUP). Synchronisation, rhythm and relative contribution of the thoracic and abdominal muscles were analysed. The final goal was to contribute to a reference data base for diagnostic purposes and find out if RUP could be a simple diagnostic technique for use in the field. The RUP system in its current form is too sensitive to signal noise and generated data are difficult to quantify. Nevertheless, using an alternative algorithm the respiratory strategy of healthy and coughing donkeys appeared different. Keywords: Donkey pulmonary function, Respiratory ultrasound plethysmography, Thoracic abdominal asynchrony Eşeklerde Solunum Ultrason Pletismografisinin Gözlemlenmesi Üzerine Bir Çalışma ÖzetEşeklerin göğüs ve karın bölgelerinin respiratorik eforu yeterince tanımlanmamıştır. Bildiğimiz kadarıyla, eşeklerde akciğer mekaniğinin izlenmesi için objektif, invaziv olmayan bir sistem yoktur. Bu çalışma, eşeklerde torakoabdominal asenkroninin doğasını tanımlayan ilk çalışmadır. Bu amaç için, 22 Haziran 2016'dan 19 Ocak 2017'ye kadar, Schlosshof GmbH'ya ait tüm eşekler (n = 18) kullanılmıştır. Bu çalışmada, solunum sırasındaki göğüs ve karın bölgelerinin hareket farklılıklarının Solunum Ultrason Pletismografi (RUP) metodu ile analiz edilmesi amaçlandı. Bu amaçla göğüs ve karın bölgelerinin hareketlerinin senkronizasyon, ritim ve bağıl dağılımları analiz edildi. Çalışmanın nihai amacı, referans veri tabanına katkıda bulunmak ve sahada diyagnostik amaçlı basit bir RUP tekniği geliştirmekti, fakat, RUP metodunun mevcut haliyle sinyal gürültülerine aşırı duyarlı olduğu ve elde edilen verileri etkilediği gözlemlendi. Bununla birlikte, sağlıklı ve öksüren eşeklerin solunumları için alternatif algoritma stratejisi uygulanmasıyla da sonuçların farklı olduğu ortaya konuldu.

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Telemetric analysis of breathing pattern variability in recurrent airway obstruction (heaves)-affeeted horses

Abstract: The decrease in the SDs of RIP measurements indicated a lower degree of variability in breathing patterns of RAO-affected horses. This loss of variability may provide an early indicator of airway inflammation.

Cited by 6 publications

References 20 publications

Reliability of breath by breath spirometry and relative flow-time indices for pulmonary function testing in horses

Reliability of breath by breath spirometry and relative flow-time indices for pulmonary function testing in horses

Plasma cortisol concentration increases within 6 hours of stabling inRAO‐affected horses

Eşeklerde Solunum Ultrason Pletismografisinin Gözlemlenmesi Üzerine Bir Çalışma

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