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Malagelada C, Drozdzal M, Seguí S, Mendez S, Vitrià J, Radeva P, Santos J, Accarino A, Malagelada JR, Azpiroz F. Classification of functional bowel disorders by objective physiological criteria based on endoluminal image analysis. Am J Physiol Gastrointest Liver Physiol 2015; 309:G413-9. [PMID: 26251472 DOI: 10.1152/ajpgi.00193.2015] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/22/2015] [Accepted: 07/30/2015] [Indexed: 01/31/2023]
Abstract
We have previously developed an original method to evaluate small bowel motor function based on computer vision analysis of endoluminal images obtained by capsule endoscopy. Our aim was to demonstrate intestinal motor abnormalities in patients with functional bowel disorders by endoluminal vision analysis. Patients with functional bowel disorders (n = 205) and healthy subjects (n = 136) ingested the endoscopic capsule (Pillcam-SB2, Given-Imaging) after overnight fast and 45 min after gastric exit of the capsule a liquid meal (300 ml, 1 kcal/ml) was administered. Endoluminal image analysis was performed by computer vision and machine learning techniques to define the normal range and to identify clusters of abnormal function. After training the algorithm, we used 196 patients and 48 healthy subjects, completely naive, as test set. In the test set, 51 patients (26%) were detected outside the normal range (P < 0.001 vs. 3 healthy subjects) and clustered into hypo- and hyperdynamic subgroups compared with healthy subjects. Patients with hypodynamic behavior (n = 38) exhibited less luminal closure sequences (41 ± 2% of the recording time vs. 61 ± 2%; P < 0.001) and more static sequences (38 ± 3 vs. 20 ± 2%; P < 0.001); in contrast, patients with hyperdynamic behavior (n = 13) had an increased proportion of luminal closure sequences (73 ± 4 vs. 61 ± 2%; P = 0.029) and more high-motion sequences (3 ± 1 vs. 0.5 ± 0.1%; P < 0.001). Applying an original methodology, we have developed a novel classification of functional gut disorders based on objective, physiological criteria of small bowel function.
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Affiliation(s)
- Carolina Malagelada
- Digestive System Research Unit, University Hospital Vall d'Hebron; Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd); Department of Medicine, Universitat Autònoma de Barcelona, Barcelona, Spain
| | | | - Santi Seguí
- Computer Vision Center, Bellaterra, Spain; and Applied Mathematics and Analysis Department, University of Barcelona, Barcelona, Spain
| | - Sara Mendez
- Digestive System Research Unit, University Hospital Vall d'Hebron; Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd); Department of Medicine, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Jordi Vitrià
- Computer Vision Center, Bellaterra, Spain; and Applied Mathematics and Analysis Department, University of Barcelona, Barcelona, Spain
| | - Petia Radeva
- Computer Vision Center, Bellaterra, Spain; and Applied Mathematics and Analysis Department, University of Barcelona, Barcelona, Spain
| | - Javier Santos
- Digestive System Research Unit, University Hospital Vall d'Hebron; Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd); Department of Medicine, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Anna Accarino
- Digestive System Research Unit, University Hospital Vall d'Hebron; Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd); Department of Medicine, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Juan-R Malagelada
- Digestive System Research Unit, University Hospital Vall d'Hebron; Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd); Department of Medicine, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Fernando Azpiroz
- Digestive System Research Unit, University Hospital Vall d'Hebron; Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd); Department of Medicine, Universitat Autònoma de Barcelona, Barcelona, Spain;
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