Hydrodynamics and Aspiration in a Patient-Specific Swallowing Biomechanical Model with Variable Epiglottis Angles

Published: 12 June 2024| Version 1 | DOI: 10.17632/2d49dpych5.1


The dataset was compiled to understand the fluid dynamics of swallowing and aspiration, focusing on aspiration mechanisms in an anatomically accurate pharyngolaryngeal model with varying epiglottis angles. It contains 46 files: 32 videos, 6 images, 5 STL files, and 3 documents listing the physical properties of the test fluids (water and 1% w/v methylcellulose aqueous solution). The main folder, "Dataset," is organized into several subfolders: "3D Models and Fluid Properties," "Up-tilt 30 Deg," "Horizontal 0 Deg," "Down-tilt 45 Deg," and "Down-tilt 80 Deg." The last four subfolders are further divided based on dispensing conditions and liquid types. Data were generated using a biomechanical swallowing model created from transparent casts of a patient-specific pharyngolaryngeal structure, based on CT scans of an 18-year-old male. Fluorescent dye was used to visualize liquid flow dynamics from both side and back views. The videos illustrate the fluid dynamics of swallowing and aspiration, showing detailed flow patterns and aspiration sites. These insights are crucial for validating computational models, designing new experiments, and developing clinical interventions for dysphagia and aspiration. The documents provide detailed physical properties of the test fluids, including dynamic viscosity, surface tension, and contact angles on various materials. Files were named for easy identification. For example, "MC_fast_posterior_horizontal.mp4" indicates the MC aqueous solution dispensed quickly to the posterior wall. In the "3D Models and Fluid Properties" subfolder, there are 4 photos showing the pharyngolaryngeal model with each epiglottis model installed. In addition to the fluid properties, this subfolder also contains a photo of the three 3D-printed epiglottis models laid side-by-side and a photo showing the top and bottom views of the straight epiglottis model. It also contains 5 STL files with the segmented 3D models used in the study. The videos are located in the terminal subfolders at the end of the dataset's organizational structure. These subfolders are named based on the specific liquid used (MC or Water) and house the video files. For example, the path to a video file might be: Dataset > Horizontal 0 Deg > Fast-Posterior > MC. Each terminal subfolder contains two videos, one showing the liquid dispensing action and fluid behavior from the side view and the other from the back view. Videos showing the back view have "back_view" added to their file name. Videos without "back_view" in the file name show the action from the side view.



California Baptist University, Cleveland Clinic Lerner College of Medicine of Case Western Reserve University, University of Massachusetts Lowell, Jilin University


Biomedical Engineering, Oncology, Otorhinolaryngology, Pathology, Respiratory Medicine, Physical Medicine and Rehabilitation, Stroke Therapy