Measurement of tidal breathing flow-volume loop indices in horses used for different sporting purposes with and without recurrent airway obstruction.

The article focuses on how the performance of horses in different sporting categories is impacted by recurrent airway obstruction (RAO) by using tidal breathing flow-volume loop (TBFVL) indices. The study also explores the effectiveness of these indices in identifying RAO in horses used in different disciplines.

Research Methodology

• The research involved a comprehensive examination of TBFVL indices in horses marked as healthy and those diagnosed with mild and severe RAO.
• The authors divided the test subjects into three groups based on the type of sporting activity they undertake: Leisure horses; horses competing in events lasting for more than five minutes such as eventing, coaching and endurance; and lastly, horses engaged in events that go on for less than five minutes like dressage and show jumping.
• Flow-volume curves, the graphical representation of airflow in relation to the total volume breathed, were then recorded with the help of an ultrasonic spirometer.
• Special software was used to compute the various TBFVL indices.

Findings from the Research

• The research unearthed a noteworthy relation between the sporting activity of the horses and the ability of TBFVL indices to identify RAO’s different stages. This implies that the physical activities undertaken by these horses have an effect on their respiratory systems, which can be detected and quantified through TBFVL indices.
• Among the indices evaluated, TIF50 was able to differentiate healthy horses from those affected by mild RAO across all sporting categories. TIF50 represents the flow of air in the first half of the inspiratory phase, thus reflecting on the severity of the airway obstruction in the horse.

In conclusion, the paper suggests that TBFVL indices, specifically the TIF50 index, can be a valuable diagnostic measurement tool in determining the degree of RAO in horses across various sporting activities. This helps in assessing the health of the horse and taking prompt action when required to optimise its performance and wellbeing.