FEES Endoscopic Swallowing Evaluation: A Detailed Look at Vocal Structures

What FEES Is

FEES (Fiber-Optic Endoscopic Evaluation of Swallowing) is a non-invasive diagnostic procedure that uses a flexible endoscope with a tiny camera to visualize the structures involved in swallowing, including the larynx and vocal folds. This technique allows for real-time assessment of the movement and coordination of these structures during swallowing.

FEES is particularly useful for identifying disorders such as aspiration (when food or liquid enters the airway), which can lead to pneumonia, and for evaluating voice quality and function in patients with voice disorders.

How FEES Works

During a FEES evaluation, a small, flexible endoscope is inserted through the nose or mouth. The camera at the tip of the endoscope provides clear images of the larynx and vocal folds as they move during swallowing. This allows for detailed observation of the structures' function and any abnormalities.

The procedure is typically performed in an outpatient setting and does not require anesthesia, making it a safe and convenient diagnostic tool.

Why It Matters

FEES is crucial for diagnosing swallowing disorders because it provides real-time visual feedback of the swallowing process. This information helps healthcare providers to identify specific issues that may not be apparent through other methods, such as X-rays or MRI.

In addition, FEES can help in the diagnosis and management of voice disorders by providing detailed images of the vocal folds during speech and swallowing.

Real-World Applications

FEES is widely used in clinical settings to diagnose and monitor patients with dysphagia (swallowing difficulties) and laryngopharyngeal reflux. It also plays a significant role in the assessment of voice disorders, particularly those related to vocal fold function.

The technique has been instrumental in developing personalized treatment plans for patients with swallowing and voice disorders, improving their quality of life.

Frequently asked questions

Try it live

Everything above runs in your browser — open FEES Endoscopic Swallowing Evaluation Simulator and change the parameters while it is running. Nothing is installed, nothing is uploaded, the whole model lives in one tab.