Update on laryngeal disorders and treatment.

This research paper discusses recent progress in diagnosing and treating laryngeal disorders in horses, with a focus on the value of exercising endoscopy, a newly developed overground endoscopy, and treatment adjustments for already known conditions like laryngeal hemiplegia.

Understanding Laryngeal Disorders in Horses

Laryngeal disorders are relatively frequent health issues that affect horses. They require a thorough and detailed diagnostic evaluation in order to accurately identify the condition and provide the correct treatment. This paper contributes to our understanding of these disorders and sheds light on the importance of using tools such as exercising endoscopy as part of the diagnostic process.

• The research emphasizes the critical role of exercising endoscopy in diagnosing laryngeal disorders. This method involves inserting an endoscope, a long, flexible tube attached to a light and video camera, into the horse’s mouth and down the esophagus to visualize the larynx during exercise. This allows for real-time observation and assessment of the laryngeal function under conditions closely simulating normal exercise.
• The paper also introduces a new diagnostic tool – dynamic (overground) endoscopy. This reflects an advanced approach that offers insights into dynamic laryngeal lesions – abnormalities or damages in the larynx that change in size, shape, or extent during movement or when under different conditions.

Recent Development in Treatments

The researchers explore recent developments in the treatment of laryngeal disorders, targeting the improvement of existing treatments and understanding completely new disorders.

• The paper reviews the various research efforts directed towards improving laryngoplasty – a surgical procedure used to treat laryngeal hemiplegia. This condition, also known as “roaring” due to the abnormal sound that affected horses make, involves paralysis of the larynx, impacting the horse’s ability to breathe. Adjustments to the surgical procedure can help to optimize the outcomes for affected horses.
• In a first-time description, the researchers explore bilateral dynamic laryngeal collapse – where both sides of the larynx collapse, impeding normal breathing, and dynamically flaccid epiglottis – a condition that occurs when the horse’s epiglottis, a leaf-shaped cartilage at the base of the tongue, loses its normal stiffness and changes shape during exercise.