Using ultrasound to measure hyoid bone movement during swallowing across food textures

What is it about?

Swallowing problems can make eating and drinking unsafe and may increase the risk of choking, food or liquid entering the airway, pneumonia, poor nutrition, and reduced quality of life. During swallowing, the hyoid bone, a small bone in the neck, moves to help protect the airway and support the passage of food and liquid through the throat. In this study, we used ultrasound to measure how the hyoid bone moves during swallowing. We compared these ultrasound measurements with standard swallowing examinations in adults with suspected swallowing difficulties. We also tested different food and liquid textures, because swallowing safety and throat residue can change depending on texture. We found that smaller hyoid bone movement was related to greater airway invasion during thin-liquid swallowing. Slower hyoid bone movement was also related to more residue in part of the throat after swallowing some thicker food textures. However, hyoid movement alone did not explain all types of swallowing problems. These findings suggest that ultrasound may provide a simple, non-invasive way to measure swallowing movement and give clinicians additional information during swallowing assessment. Ultrasound should be used together with clinical judgment and standard swallowing examinations, rather than as a replacement for them.

Why is it important?

This work is important because swallowing problems are common, clinically serious, and difficult to assess repeatedly at the bedside. Standard swallowing examinations are useful but may involve radiation, invasive procedures, or specialized facilities. Our study shows that ultrasound can be used to measure hyoid bone movement during swallowing in a simple and non-invasive way. We also found that the relationship between hyoid movement and swallowing problems differs across food textures. This may help clinicians better understand why some patients have difficulty with thin liquids while others retain residue after thicker foods, and it may support future ultrasound-assisted swallowing assessment.