GastroDigitalShirt: Digestion Acoustics Monitoring

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Most common digestive disorders are chronic conditions and reduce quality of life for patients.

Among the standard diagnostic techniques used by gastroenterologists, auscultation is one of the few non-invasive methods. Auscultation is a standard medical practice consisting in listening to body sounds  for typically a few minutes.

We are interested in investigating low-amplitude bowel sounds produced during peristaltic contractions as an indicator of chronic gastrointestinal diseases. Bowel Sounds (BS) events occur randomly, sparsely, and with very low amplitude compared to other body sounds. Typical short-time clinical auscultation could therefore only capture a few or none BS events. How would it then be possible to derive meaningful digestion-related biomarkers with such little knowledge of the digestive process?


We developed the GastroDigitalShirt, a smart T-Shirt for long-term, acoustic abdominal monitoring.

The garment prototype embeds an array of eight miniaturised microphones connected to a low-power wearable computer. The fabric is made of elastane, which makes the T-Shirt highly stretchable and comfortable. 

The GastroDigitalShirt is available in different sizes to fit the largest population possible.

a) Abdominal reference map for the microphone matrix (Model adapted from “Digestive System 3D Model”, under Creative Commons Attribution 4.0 International License). b) Placement and wiring of the electronics on the GastroDigitalShirt. c) Top row: one pair of miniaturised microphones connected to the custom wearable computer. Bottom row: the custom wearable computer. d) GastroDigitalShirt inside out showing the pockets and inserts to fix electronics. e) A GastroDigitalShirt prototype worn.

With the GastroDigitalShirt we monitored different digestion phases over six hours in healthy participants with no prior gastro-intestinal diseases. With our prototype we could identify 4 BS pattern clusters which can be related to known BS types. 

In future work we plan to extend our dataset, including patients to investigate novel digestion-related biomarkers from BS patterns as well as to develop automated BS segmentation methods.



The GastroDigitalShirt received in 2019 the DGVS Innovation Award “Digital Gastroenterology” by the German Society for Gastroenterology, Digestive and Metabolic Diseases. The award recognizes projects to promote the development of digital innovations in gastroenterology. Click here for more information.

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Annalisa Baronetto, Luisa S. Graf, Sarah Fischer, Markus F. Neurath, Oliver Amft, "GastroDigitalShirt: A Smart Shirt for Digestion Acoustics Monitoring", ISWC '20: Proceedings of the 2020 International Symposium on Wearable Computers, ACM, September 2020.


Annalisa Baronetto

Friedrich-Alexander-Universität Erlangen-Nürnberg