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Odah T, Vattikonda A, Stark M, Brahmbhatt B, Lukens FJ, Badurdeen D, Hashash JG, Farraye FA. Glucagon-like peptide-1 receptor agonists and capsule endoscopy in patients with diabetes: a matched cohort study. Gastrointest Endosc 2024:S0016-5107(24)03360-1. [PMID: 39094916 DOI: 10.1016/j.gie.2024.07.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/12/2024] [Revised: 07/05/2024] [Accepted: 07/21/2024] [Indexed: 08/04/2024]
Abstract
BACKGROUND AND AIMS Video capsule endoscopy (VCE) is valuable for assessing conditions like GI bleeding, anemia, and inflammatory bowel disease. Glucagon-like peptide-1 receptor agonists (GLP-1 RAs) are prescribed for diabetes and weight loss, with their pharmacologic effects including delayed gastric emptying. This study investigates the impact of GLP-1 RA use on VCE outcomes in patients with diabetes. METHODS This retrospective cohort study involves patients with diabetes undergoing VCE while on GLP-1 RAs matched in a 1:1 ratio with control subjects, who are not on GLP-1 RAs, based on demographics and diabetes-related factors. The primary outcome was gastric transit time in VCE studies, whereas secondary outcomes were incomplete small-bowel evaluation and small-bowel transit time. RESULTS In the GLP-1 RA cohort with 68 patients, 5 (7%) experienced failure to pass the video capsule through the stomach; all control subjects passed the video capsule successfully (P = .06). GLP-1 RA patients had a longer gastric transit time (99.3 ± 134.2 minutes) compared with control subjects (25.3 ± 31.6 minutes, P < .001). Multivariate analysis revealed GLP-1 RA use was associated with an increased gastric transit time by 74.5 minutes (95% confidence interval, 33.8-115.2; P < .001) compared with control subjects, after adjusting for relevant factors. Sixteen GLP-1 RA patients (23.5%) experienced incomplete passage of the video capsule through the small intestine, a significantly higher rate compared with 3 patients in the control group (4.4%, P < .01). CONCLUSIONS GLP-1 RA use is associated with a prolonged gastric transit time and a higher rate of incomplete small-bowel evaluation during VCE. Future studies may be crucial for evaluating strategies to mitigate these effects.
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Affiliation(s)
- Tarek Odah
- Division of Gastroenterology and Hepatology, Mayo Clinic, Jacksonville, Florida, USA
| | - Asrita Vattikonda
- Department of Internal Medicine, Mayo Clinic, Jacksonville, Florida, USA
| | - Mark Stark
- Division of Gastroenterology and Hepatology, Mayo Clinic, Jacksonville, Florida, USA
| | - Bhaumik Brahmbhatt
- Division of Gastroenterology and Hepatology, Mayo Clinic, Jacksonville, Florida, USA
| | - Frank J Lukens
- Division of Gastroenterology and Hepatology, Mayo Clinic, Jacksonville, Florida, USA
| | - Dilhana Badurdeen
- Division of Gastroenterology and Hepatology, Mayo Clinic, Jacksonville, Florida, USA
| | - Jana G Hashash
- Division of Gastroenterology and Hepatology, Mayo Clinic, Jacksonville, Florida, USA
| | - Francis A Farraye
- Division of Gastroenterology and Hepatology, Mayo Clinic, Jacksonville, Florida, USA
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Akiki K, Mahmoud T, Alqaisieh MH, Sayegh LN, Lescalleet KE, Abu Dayyeh BK, Wong Kee Song LM, Larson MV, Bruining DH, Coelho-Prabhu N, Buttar NS, Sedlack RE, Chandrasekhara V, Leggett CL, Law RJ, Rajan E, Gleeson FC, Alexander JA, Storm AC. A novel blood-sensing capsule for rapid detection of upper GI bleeding: a prospective clinical trial. Gastrointest Endosc 2024; 99:712-720. [PMID: 38065512 DOI: 10.1016/j.gie.2023.11.051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/13/2023] [Revised: 11/07/2023] [Accepted: 11/23/2023] [Indexed: 04/24/2024]
Abstract
BACKGROUND AND AIMS Upper GI bleeding (UGIB) is a common medical emergency associated with high resource utilization, morbidity, and mortality. Timely EGD can be challenging from personnel, resource, and access perspectives. PillSense (EnteraSense Ltd, Galway, Ireland) is a novel swallowed bleeding sensor for the detection of UGIB, anticipated to aid in patient triage and guide clinical decision-making for individuals with suspected UGIB. METHODS This prospective, open-label, single-arm comparative clinical trial of a novel bleeding sensor for patients with suspected UGIB was performed at a tertiary care center. The PillSense system consists of an optical sensor and an external receiver that processes and displays data from the capsule as "Blood Detected" or "No Blood Detected." Patients underwent EGD within 4 hours of capsule administration; participants were followed up for 21 days to confirm capsule passage. RESULTS A total of 126 patients were accrued to the study (59.5% male; mean age, 62.4 ± 14.3 years). Sensitivity and specificity for detecting the presence of blood were 92.9% (P = .02) and 90.6% (P < .001), respectively. The capsule's positive and negative predictive values were 74.3% and 97.8%, and positive and negative likelihood ratios were 9.9 and .08. No adverse events or deaths occurred related to the PillSense system, and all capsules were excreted from patients on follow-up. CONCLUSIONS The PillSense system is safe and effective for detecting the presence of blood in patients evaluated for UGIB before upper GI endoscopy. It is a rapidly deployed tool, with easy-to-interpret results that will affect the diagnosis and triage of patients with suspected UGIB. (Clinical trial registration number: NCT05385224.).
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Affiliation(s)
- Karl Akiki
- Division of Gastroenterology and Hepatology, Mayo Clinic School of Graduate Medical Education, Mayo Clinic College of Medicine and Science, Rochester, Minnesota, USA
| | - Tala Mahmoud
- Division of Gastroenterology and Hepatology, Mayo Clinic School of Graduate Medical Education, Mayo Clinic College of Medicine and Science, Rochester, Minnesota, USA
| | - Mohammad H Alqaisieh
- Division of Gastroenterology and Hepatology, Mayo Clinic School of Graduate Medical Education, Mayo Clinic College of Medicine and Science, Rochester, Minnesota, USA
| | - Lea N Sayegh
- Division of Gastroenterology and Hepatology, Mayo Clinic School of Graduate Medical Education, Mayo Clinic College of Medicine and Science, Rochester, Minnesota, USA
| | - Kristin E Lescalleet
- Division of Gastroenterology and Hepatology, Mayo Clinic School of Graduate Medical Education, Mayo Clinic College of Medicine and Science, Rochester, Minnesota, USA
| | - Barham K Abu Dayyeh
- Division of Gastroenterology and Hepatology Mayo Clinic, Rochester, Minnesota, USA
| | | | - Mark V Larson
- Division of Gastroenterology and Hepatology Mayo Clinic, Rochester, Minnesota, USA
| | - David H Bruining
- Division of Gastroenterology and Hepatology Mayo Clinic, Rochester, Minnesota, USA
| | | | - Navtej S Buttar
- Division of Gastroenterology and Hepatology Mayo Clinic, Rochester, Minnesota, USA
| | - Robert E Sedlack
- Division of Gastroenterology and Hepatology Mayo Clinic, Rochester, Minnesota, USA
| | - Vinay Chandrasekhara
- Division of Gastroenterology and Hepatology Mayo Clinic, Rochester, Minnesota, USA
| | - Cadman L Leggett
- Division of Gastroenterology and Hepatology Mayo Clinic, Rochester, Minnesota, USA
| | - Ryan J Law
- Division of Gastroenterology and Hepatology Mayo Clinic, Rochester, Minnesota, USA
| | - Elizabeth Rajan
- Division of Gastroenterology and Hepatology Mayo Clinic, Rochester, Minnesota, USA
| | - Ferga C Gleeson
- Division of Gastroenterology and Hepatology Mayo Clinic, Rochester, Minnesota, USA
| | - Jeffrey A Alexander
- Division of Gastroenterology and Hepatology Mayo Clinic, Rochester, Minnesota, USA
| | - Andrew C Storm
- Division of Gastroenterology and Hepatology Mayo Clinic, Rochester, Minnesota, USA.
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Vargas-Potes CJ, Zapata-Vásquez IL, Rojas-Rojas NE, Rojas-Rodríguez CA. Clinical impact of capsule endoscopy on patients with suspected small bowel bleeding: Experience at a highly specialized hospital in Colombia. REVISTA DE GASTROENTEROLOGIA DE MEXICO (ENGLISH) 2024; 89:222-231. [PMID: 37833138 DOI: 10.1016/j.rgmxen.2023.04.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Accepted: 04/25/2023] [Indexed: 10/15/2023]
Abstract
INTRODUCTION AND AIMS Capsule endoscopy is part of the diagnostic approach to patients with suspected small bowel bleeding and data on its clinical impact are still limited in developing countries. The primary aim of the present study was to determine its impact on subsequent diagnostic and therapeutic decisions. MATERIAL AND METHODS A retrospective study was conducted that included all the patients that underwent capsule endoscopy with the PillCam™ SB 3 Capsule system due to suspected small bowel bleeding treated at the Hospital Universitario Fundación Valle del Lili between January 2011 and December 2020. RESULTS A total of 158 patients met the inclusion criteria. Mean patient age was 63 years (interquartile range [IQR], 52-74), 53.6% of the patients were women, and high blood pressure was the most frequent comorbidity (43.7%). The main indication was overt bleeding (58.2%). Of all the capsule endoscopies carried out, 63.9% showed lesions that were potentially responsible for bleeding. Medical or surgical treatment was indicated in 63.3% of the case total. Rebleeding at 6 months occurred in 15 patients and there were 2 deaths due to gastrointestinal bleeding at 6 months. CONCLUSIONS Capsule endoscopy has a high impact on patients with suspected small bowel bleeding, with respect to clinical decision-making, as well as rebleeding, hospitalization, and mortality outcomes. The positivity rate of lesions potentially responsible for bleeding was similar to that reported in developed countries.
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Affiliation(s)
- C J Vargas-Potes
- Departamento de Medicina Interna, Facultad de Ciencias de la Salud, Universidad Icesi, Cali, Valle del Cauca, Colombia.
| | - I L Zapata-Vásquez
- Centro de Investigaciones Clínicas (CIC), Fundación Valle del Lili, Cali, Valle del Cauca, Colombia
| | - N E Rojas-Rojas
- Centro de Investigaciones Clínicas (CIC), Fundación Valle del Lili, Cali, Valle del Cauca, Colombia
| | - C A Rojas-Rodríguez
- Departamento de Gastroenterología, Fundación Valle del Lili, Cali, Valle del Cauca, Colombia
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Bhattacharya S, Wong U, Khalid M, Blaney H, Menkart MG, Oringher JL, Taneja SL, Zerbe CS, De Ravin SS, Malech HL, Holland SM, Koh C, Heller T. Small bowel disease prevalence on video capsule endoscopy in chronic granulomatous disease-associated inflammatory bowel disease. J Gastroenterol Hepatol 2023; 38:2083-2089. [PMID: 37743535 PMCID: PMC10840869 DOI: 10.1111/jgh.16342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Revised: 07/27/2023] [Accepted: 08/15/2023] [Indexed: 09/26/2023]
Abstract
BACKGROUND AND AIM Patients with chronic granulomatous disease (CGD) may develop inflammatory bowel disease (IBD). Characterization of small bowel disease in this cohort is scarce. Here, we sought to determine the prevalence and characteristics of small bowel disease and evaluate the clinical utility of video capsule endoscopy (VCE) for its diagnosis. METHODS A retrospective study was performed on patients with CGD who were evaluated for gastrointestinal disease with VCE as a part of ongoing natural history studies at a single academic center. VCEs were reviewed for inflammatory findings and severity of disease utilizing the Capsule Endoscopy Crohn's Disease Activity Index. Radiographic studies and endoscopies performed within 30 days of VCE were compared with small bowel inflammatory findings. RESULTS Twenty-six VCEs corresponding to 25 patients were found. The majority of patients were male and White; mean age was 28 years old. The majority (85%) demonstrated presence of small bowel inflammatory findings on VCE including strictures, ulcers, erosions, and erythema. Duodenal and ileal inflammatory disease on endoscopy did not correlate with disease on VCE. Moderate-severe colonic disease correlated with moderate-severe disease on VCE. Radiography did not correlate with disease on VCE. Prolonged small bowel transit time correlated with moderate-severe small bowel disease. CONCLUSIONS Small bowel IBD was highly prevalent in this cohort of patients with CGD. Limitations included small sample size. Given that radiology and duodenal/ileal disease did not correlate with VCE findings, VCE-driven investigation of small bowel disease should be considered in patients with CGD-associated IBD, particularly those with colonic disease.
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Affiliation(s)
- Sumona Bhattacharya
- Digestive Disease Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | - Uni Wong
- Division of Gastroenterology and Hepatology, Division of Medicine, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Mian Khalid
- Digestive Disease Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | - Hanna Blaney
- Digestive Disease Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | - Matthew G. Menkart
- Translational Hepatology Section, Liver Disease Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | - Jenna L. Oringher
- Translational Hepatology Section, Liver Disease Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | - Sonia L. Taneja
- Digestive Disease Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | - Christa S. Zerbe
- Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | - Suk See De Ravin
- Laboratory of Host Defenses, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | - Harry L. Malech
- Laboratory of Host Defenses, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | - Steven M. Holland
- Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | - Christopher Koh
- Liver Disease Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | - Theo Heller
- Translational Hepatology Section, Liver Disease Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland, USA
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Singla N, Inavolu P, Jagtap N, Singh AP, Kalapala R, Memon SF, Katukuri GR, Pal P, Nabi Z, Ramchandani M, Lakhtakia S, Banerjee R, Reddy PM, Tandan M, Reddy N. Small Bowel Capsule Endoscopy: Experience from a single large tertiary care centre. Endosc Int Open 2023; 11:E623-E628. [PMID: 37614640 PMCID: PMC10442921 DOI: 10.1055/a-2096-2453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/10/2022] [Accepted: 12/20/2022] [Indexed: 08/25/2023] Open
Abstract
Background and study aims Capsule endoscopy (CE) has transformed examination of the small bowel (SB), once considered a dark continent. The present study aimed to describe the indications, diagnostic yield, practical issues and complications of CE in one of the largest tertiary center in India. Patients and methods This retrospective analysis from a prospectively maintained database, conducted from January 2013 to June 2021 included 1155 CEs performed during this period. Patient medical records were reviewed for indications, results, and complications of CE. Results A total of 1154 patients (809 males and 345 females), mean age 53 years (range 6-87 years), one capsule got stuck in the esophagus, were included in the study. Active SB bleeding had no effect on SB transit time (324.7±161 minutes, n = 137 patients with active bleed vs 310.6±166.9 minutes, n = 1017 patients without active bleed; P = 0.35). The indication and diagnostic yield (DY) of CE were potential overt SB bleed (68.6% & 43.9%), potential occult SB bleed (8.2% and 40%), chronic diarrhea (7.9% and 28.4%), abdominal pain (6.5% and 21.3%), anemia (5.9% and 57.9%), and suspected/known case of Crohn's disease (2.3% & 56.5%) respectively. The DY for patients with age ≥60 years was similar to those with age < 60 years (61.9% vs. 51.8% respectively; P = 0.4). 21 patients (1.8%) had capsule retention of which six (0.5%) had to be referred for surgery. Conclusions CE is a safe and effective investigation with ever increasing range of indications. Potential SB bleed remains the most common indication for CE with high detection rate.
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Affiliation(s)
- Neeraj Singla
- Gastroenterology, Asian Institute of Gastroenterology, Hyderabad, India
| | - Pradev Inavolu
- Gastroenterology, Asian Institute of Gastroenterology, Hyderabad, India
| | - Nitin Jagtap
- Gastroenterology, Asian Institute of Gastroenterology, Hyderabad, India
| | | | - Rakesh Kalapala
- Gastroenterology, Asian Institute of Gastroenterology, Hyderabad, India
| | | | | | - Partha Pal
- Gastroenterology, Asian Institute of Gastroenterology, Hyderabad, India
| | - Zaheer Nabi
- Gastroenterology, Asian Institute of Gastroenterology, Hyderabad, India
| | - Mohan Ramchandani
- Gastroenterology, Asian Institute of Gastroenterology, Hyderabad, India
| | - Sundeep Lakhtakia
- Gastroenterology, Asian Institute of Gastroenterology, Hyderabad, India
| | - Rupa Banerjee
- Gastroenterology, Asian Institute of Gastroenterology, Hyderabad, India
| | | | - Manu Tandan
- Gastroenterology, Asian Institute of Gastroenterology, Hyderabad, India
| | - Nageshwar Reddy
- Gastroenterology, Asian Institute of Gastroenterology, Hyderabad, India
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Mohan N, Jarrett S, Pop A, Rodriguez D, Dudnick R. Effect of small bowel transit time on accuracy of video capsule endoscopy in evaluating suspected small bowel bleeding. World J Gastrointest Pharmacol Ther 2022; 13:88-95. [PMID: 36405301 PMCID: PMC9669782 DOI: 10.4292/wjgpt.v13.i6.88] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Revised: 08/02/2022] [Accepted: 09/21/2022] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND Obscure small bowel bleeding is defined as gastrointestinal bleeding (GIB) that is unidentifiable with esophagogastroduodenoscopy and a colonoscopy with video capsule endoscopy (VCE) being the next gold standard step for evaluation. Small bowel transit time (SBTT) is a metric of a VCE study that is defined as the time the capsule takes to travel through the small intestine.
AIM To determine if SBTT within the VCE study, correlates to overall detection of obscure small bowel bleeds. Furthermore, we attempted to identify any existing correlation between SBTT and re-bleeding after a negative VCE study.
METHODS This is a single center retrospective analysis of VCE studies performed for overt and occult GIB at Einstein Medical Center, Philadelphia, between 2015 and 2019. Inclusion criteria primarily consisted of patients 18 years or older who had a VCE study done as part of the workup for a GIB. Patients with incomplete VCEs, poor preparation, or with less than 6 mo of follow up were excluded. A re-bleeding event was defined either as overt or occult within a 6-mo timeframe. Overt re-bleeding was defined as Visible melena or hematochezia with > 2 gm/dL drop in hemoglobin defined an overt re-bleeding event; whereas an unexplained > 2 gm/dL drop in hemoglobin with no visible bleeding defined an occult re-bleed.
RESULTS Results indicated that there was a significant and positive point biserial correlation between SBTT of 220 min and detection of a bleeding focus with a statistically significant p value of 0.008. However, the area under the curve was negligible when trying to identify a threshold time for SBTT to discriminate between risk of re-bleeding events after a negative VCE.
CONCLUSION In terms of SBTT and association with accuracy of VCE finding a bleeding focus, 220 min was found to be adequate transit time to accurately find a bleeding focus, when present. It was found that no threshold SBTT could be identified to help predict re-bleeding after a negative VCE.
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Affiliation(s)
- Nandakumar Mohan
- Internal Medicine, Einstein Medical Center Philadelphia, Philadelphia, PA 19141, United States
| | - Simone Jarrett
- Internal Medicine, Einstein Medical Center Philadelphia, Philadelphia, PA 19141, United States
| | - Alexander Pop
- Division of Gastrointestinal Diseases and Hepatology, Einstein Medical Center Philadelphia, Philadelphia, PA 19141, United States
| | - Daniel Rodriguez
- Department of Urban Health and Nutrition, Lasalle University, Philadelphia, PA 19141, United States
| | - Robert Dudnick
- Division of Gastrointestinal Diseases and Hepatology, Einstein Medical Center Philadelphia, Philadelphia, PA 19141, United States
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Tracking the Traveled Distance of Capsule Endoscopes along a Gastrointestinal-Tract Model Using Differential Static Magnetic Localization. Diagnostics (Basel) 2022; 12:diagnostics12061333. [PMID: 35741143 PMCID: PMC9221653 DOI: 10.3390/diagnostics12061333] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Revised: 05/13/2022] [Accepted: 05/26/2022] [Indexed: 11/17/2022] Open
Abstract
The traveled distance and orientation of capsule endoscopes for each video frame are not available in commercial systems, but they would be highly relevant for physicians. Furthermore, scientific approaches lack precisely tracking the capsules along curved trajectories within the typical gastrointestinal tract. Recently, we showed that the differential static magnetic localisation method is suitable for the precise absolute localisation of permanent magnets assumed to be integrated into capsule endoscopes. Thus, in the present study, the differential method was employed to track permanent magnets in terms of traveled distance and orientation along a length trajectory of 487.5 mm, representing a model of the winding gastrointestinal tract. Permanent magnets with a diameter of 10 mm and different lengths were used to find a lower boundary for magnet size. Results reveal that the mean relative distance and orientation errors did not exceed 4.3 ± 3.3%, and 2 ± 0.6∘, respectively, when the magnet length was at least 5 mm. Thus, a 5 mm long magnet would be a good compromise between achievable tracking accuracy and magnet volume, which are essential for integration into small commercial capsules. Overall, the proposed tracking accuracy was better than that of the state of the art within a region covering the typical gastrointestinal-tract size.
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Ionescu A, Glodeanu A, Ionescu M, Zaharie S, Ciurea A, Golli A, Mavritsakis N, Popa D, Vere C. Clinical impact of wireless capsule endoscopy for small bowel investigation (Review). Exp Ther Med 2022; 23:262. [PMID: 35251328 PMCID: PMC8892621 DOI: 10.3892/etm.2022.11188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Accepted: 11/12/2021] [Indexed: 11/06/2022] Open
Abstract
Wireless capsule endoscopy is currently considered the gold standard in the investigation of the small bowel. It is both practical for physicians and easily accepted by patients. Prior to its development, two types of imaging investigations of the small bowel were available: radiologic and endoscopic. The first category is less invasive and comfortable for patients; it presents the ensemble of the small bowel, but it may imply radiation exposure. Images are constructed based on signals emitted by various equipment and require special interpretation. Endoscopic techniques provide real-time colored images acquired by miniature cameras from inside the small bowel, require interpretation only from a medical point of view, may allow the possibility to perform biopsies, but the investigation only covers a part of the small bowel and are more difficult to accept by patients. Wireless capsule endoscopy is the current solution that overcomes a part of the previous drawbacks: it covers the entire small bowel, it provides real-time images acquired by cameras, it is painless for patients, and it represents an abundant source of information for physicians. Yet, it lacks motion control and the possibility to perform biopsies or administer drugs. However, significant effort has been oriented in these directions by technical and medical teams, and more advanced capsules will surely be available in the following years.
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Affiliation(s)
- Alin Ionescu
- Department of Medical History, University of Medicine and Pharmacy of Craiova, 200349 Craiova, Romania
| | - Adina Glodeanu
- Department of Internal Medicine, University of Medicine and Pharmacy of Craiova, 200349 Craiova, Romania
| | - Mihaela Ionescu
- Department of Medical Informatics and Biostatistics, University of Medicine and Pharmacy of Craiova, 200349 Craiova, Romania
| | - Sorin Zaharie
- Department of Nephrology, University of Medicine and Pharmacy of Craiova, 200349 Craiova, Romania
| | - Ana Ciurea
- Department of Oncology, University of Medicine and Pharmacy of Craiova, 200349 Craiova, Romania
| | - Andreea Golli
- Department of Public Health Management, University of Medicine and Pharmacy of Craiova, 200349 Craiova, Romania
| | - Nikolaos Mavritsakis
- Department of Physical Education and Sport, ‘1 Decembrie 1918’ University, 510009 Alba Iulia, Romania
| | - Didi Popa
- Department of Information and Communication Technology, University of Craiova, 200585 Craiova, Romania
| | - Cristin Vere
- Department of Gastroenterology, University of Medicine and Pharmacy of Craiova, 200349 Craiova, Romania
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Kim W, Lee B, Yoo A, Kim S, Joo M, Park JJ. Predictors of Positive Video Capsule Endoscopy Findings for Chronic Unexplained Abdominal Pain: Single-Center Retrospective Study and Meta-Analysis. Diagnostics (Basel) 2021; 11:diagnostics11112123. [PMID: 34829470 PMCID: PMC8617728 DOI: 10.3390/diagnostics11112123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2021] [Revised: 11/13/2021] [Accepted: 11/14/2021] [Indexed: 11/26/2022] Open
Abstract
Video capsule endoscopy (VCE) is an effective diagnostic modality for detecting small bowel lesions. However, the value of VCE for patients with chronic recurrent abdominal pain (CAP) of unknown etiology remains obscure. We retrospectively analyzed factors that could predict enteropathy based on the medical records of 65 patients with unexplained chronic recurrent abdominal pain (CAP) who were assessed using VCE between 2001 and 2021. We also conducted a systematic review and meta-analysis of the literature to validate our results. The positive findings of 27 (41.5%) of the 65 patients were mostly ulcerative lesions including stricture (n = 14, 60.9%) and erosion (n = 8, 29.7%). Multivariate analysis identified elevated ESR (OR, 1.06, 95% CI, 1.02–1.1, p = 0.004) as a significant risk factor for enteropathy predicted by VCE. Three eligible studies in the meta-analysis included 523 patients with CAP. Elevated C-reactive protein (CRP) (OR, 14.09; 95% CI, 2.81–70.60; p = 0.001) and erythrocyte sedimentation rate (ESR) (OR, 14.45; 95% CI, 0.92–227.33; p = 0.06) indicated VCE-positive findings in patients with unexplained abdominal pain. Elevated levels of the inflammatory markers ESR and CRP can thus predict positive VCE findings in patients with CAP.
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Affiliation(s)
| | - Beomjae Lee
- Correspondence: ; Tel.: +82-2-2626-3004; Fax: +82-2-853-1943
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Giordano A, González AE, Ceballos FS, Carretero-Ribón C, Aicart-Ramos M, Valenzuela JE, Alonso-Lázaro N, Martín-Lorente JL, Gálvez-Castillo C, Pons-Beltrán V, Fernández-Urién I, González-Suárez B. Oral ingestion versus endoscopic delivery of endoscopic capsule in patients with previous gastrointestinal surgery (ORENCES study): A Spanish multicentre observational study. GASTROENTEROLOGIA Y HEPATOLOGIA 2020; 44:680-686. [PMID: 33259828 DOI: 10.1016/j.gastrohep.2020.11.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Accepted: 11/09/2020] [Indexed: 11/29/2022]
Abstract
BACKGROUND Small Bowel Capsule Endoscopy is the first-choice technique for investigating the majority of small bowel diseases. Its most common complications are related to incomplete examinations and capsule retention. There is no consensus on how patients with previous gastrointestinal surgery should receive the capsule. OBJECTIVE The primary endpoint was to compare the rate of complete small-bowel examinations (completion rate) between oral ingestion and endoscopic delivery of the capsule. The secondary endpoint was to compare diagnostic yield and adverse events in the two groups. METHODS A retrospective observational study was conducted in nine hospitals in Spain. Demographic data, previous surgery, indication for capsule endoscopy, intestinal transit time, diagnosis, completion rate (percentage of capsules reaching the caecum), diagnostic yield (percentage of results compatible with indication for the exam) and adverse events were collected. RESULTS From January 2009 to May 2019 fifty-seven patients were included (39 male, mean age 66±15 years). The most common indications for the exam were "overt" (50.9%) and "occult" (35.1%) small bowel bleeding. Previous Billroth II gastrectomy and Roux-en-Y gastric bypass were present in 52.6% and 17.5% of patients respectively. The capsule was swallowed in 34 patients and placed endoscopically in 23 patients. No significant differences were observed between the oral ingestion and endoscopic delivery groups in terms of completion rate (82.4% vs. 78.3%; p=0.742), diagnostic yield (41.2% vs. 52.2%; p=0.432) or small bowel transit time (301 vs. 377min, p=0.118). No capsule retention occurred. Only one severe adverse event (anastomotic perforation) was observed in the endoscopic delivery group. CONCLUSIONS In our case series, there were no significant differences between oral ingestion and endoscopic delivery in terms of completion rate, diagnostic yield or safety. Being less invasive, oral ingestion of the capsule should be the first-choice method in patients with previous gastrointestinal surgery.
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Affiliation(s)
- Antonio Giordano
- Endoscopy Unit, Department of Gastroenterology, Hospital Clínic of Barcelona, Carrer de Villarroel 170, 08036 Barcelona, Spain
| | - Alfonso Elosua González
- Department of Gastroenterology, Hospital García Orcoyen, Calle Sta. Soria 22, 31200 Estella, Spain
| | - Francisco Sánchez Ceballos
- Department of Digestive Diseases, Hospital Clínico San Carlos, Calle del Prof Martín Lagos, 28040 Madrid, Spain
| | - Cristina Carretero-Ribón
- Department of Gastroenterology, Clínica Universidad de Navarra, Av. de Pío XII 36, 31008 Pamplona, Spain
| | - Marta Aicart-Ramos
- Department of Gastroenterology, Hospital Universitario Ramón y Cajal, M-607 km. 9, 28034 Madrid, Spain
| | - Juan Egea Valenzuela
- Department of Digestive Diseases, Hospital Universitario Virgen de la Arrixaca, Ctra. Madrid-Cartagena, 30120 Murcia, Spain
| | - Noelia Alonso-Lázaro
- Gastrointestinal Endoscopy Unit, Digestive Diseases Department, Hospital Universitari La Fe, Avinguda de Fernando Abril Martorell, 46026 Valencia, Spain
| | - José Luis Martín-Lorente
- Department of Gastroenterology, Hospital Universitario de Burgos, Av. Islas Baleares 3, 09006 Burgos, Spain
| | - Consuelo Gálvez-Castillo
- Department of Gastroenterology, Hospital Clínic Universitari de València, Av. de Blasco Ibáñez 17, 46010 Valencia, Spain
| | - Vicente Pons-Beltrán
- Gastrointestinal Endoscopy Unit, Digestive Diseases Department, Hospital Universitari La Fe, Av. de Fernando Abril Martorell, 46026 Valencia, Spain
| | - Ignacio Fernández-Urién
- Department of Gastroenterology, Complejo Hospitalario de Navarra, Calle de Irunlarrea 3, 31008 Pamplona, Spain
| | - Begoña González-Suárez
- Endoscopy Unit, Department of Gastroenterology, Hospital Clínic of Barcelona, Carrer de Villarroel 170, 08036 Barcelona, Spain.
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Wu J, Huang Z, Wang Y, Tang Z, Lai L, Xue A, Huang Y. Clinical features of capsule endoscopy in 825 children: A single-center, retrospective cohort study. Medicine (Baltimore) 2020; 99:e22864. [PMID: 33120825 PMCID: PMC7581167 DOI: 10.1097/md.0000000000022864] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Video capsule endoscopy (VCE) can detect mucosal lesions in the intestine, especially in the small bowel.Our study aims to evaluate the applications of VCE for pediatric gastrointestinal diseases.In this retrospective study, we included all patients who underwent VCE between December 2012 and December 2018. Clinical information and VCE data were analyzed.Among 828 patients, the completion rate was 99.6% (n = 825), with an average age of 10.2 ± 3.3 years old. A total of 459 VCE procedures showed abnormalities, and the overall diagnostic yield was 55.6%. The most common indications for VCE were abdominal pain among 505 (61.2%) patients and hematochezia (10.1%) among 83. Among the positive results of VCE, small bowel ulcers accounted for the highest percentage (57.7%), of which 164 cases were diagnosed as inflammatory bowel disease. For obscure gastrointestinal bleeding, 12 cases were diagnosed as Meckel's diverticulum. In terms of the small bowel transit time of VCE, compared with the negative group [288 (216.5, 390.3) min] and the enteritis group [277 (192.5, 374.8) min], a longer transit time was needed in the small bowel ulcer group [332.5 (240, 451.5) min, P < .01]. There were no correlations of positive VCE findings with anemia, the white blood cell count, the C-reactive protein level or the small bowel transit time according to Spearman rank analysis.VCE is relatively well tolerated and safe in children and has great value for the diagnosis and treatment of abdominal pain, especially inflammatory bowel disease and obscure gastrointestinal bleeding.
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Affiliation(s)
- Jie Wu
- Gastroenterology Department/Endoscopy Center
| | | | - Yuhuan Wang
- Gastroenterology Department/Endoscopy Center
| | - Zifei Tang
- Gastroenterology Department/Endoscopy Center
| | - Lingyu Lai
- Department of General Internal Medicine, Children's Hospital of Fudan University, Shanghai, China
| | - Aijuan Xue
- Gastroenterology Department/Endoscopy Center
| | - Ying Huang
- Gastroenterology Department/Endoscopy Center
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Martincek I, Banovcin P, Goraus M, Duricek M. USB capsule endoscope for retrograde imaging of the esophagus. JOURNAL OF BIOMEDICAL OPTICS 2020; 25:JBO-200142SSR. [PMID: 33078602 PMCID: PMC7569471 DOI: 10.1117/1.jbo.25.10.106002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/09/2020] [Accepted: 10/06/2020] [Indexed: 06/11/2023]
Abstract
SIGNIFICANCE Endoscopes represent electro-optical devices that are used to visualize internal body cavities. The specialized endoscopic procedure of the upper gastrointestinal tract from the esophagus down to the duodenum is called an esophagogastroduodenoscopy. AIM We bring our newly developed capsule endoscopy device as a promising alternative diagnostic method for visualization of the upper gastrointestinal tract. APPROACH Capsule endoscopy has become an attractive method that uses a tiny wireless camera to take pictures of the digestive tract. Existing esophageal capsule endoscopy does not allow a retrograde view of the esophagus while retrograde scanning can provide information on the esophageal pathology. RESULTS In comparison to the existing esophageal capsule endoscopy, our system is much simpler and cheaper due to the need for fewer electronic devices. Moreover, its use is not limited by the capacity of the batteries used by existing capsule endoscopes. The new esophageal endoscopic system was created by combining the universal serial bus (USB) endoscope module with the thin power wires that are routed through the USB port to the computer. CONCLUSIONS The endoscope was tested on a volunteer without any side effects such as nausea, belching, and general discomfort. The examination of the patient is performed in a sitting position and the patient discomfort during the examination is minimal so it can be performed without anesthesia.
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Affiliation(s)
- Ivan Martincek
- University of Zilina, Department of Physics, Faculty of Electrical Engineering and Information Technology, Zilina, Slovakia
| | - Peter Banovcin
- Comenius University in Bratislava, Department of Gastroenterology, Jessenius Faculty of Medicine in Martin, Martin, Slovakia
| | - Matej Goraus
- University of Zilina, Department of Physics, Faculty of Electrical Engineering and Information Technology, Zilina, Slovakia
| | - Martin Duricek
- Comenius University in Bratislava, Department of Gastroenterology, Jessenius Faculty of Medicine in Martin, Martin, Slovakia
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Gan T, Liu S, Yang J, Zeng B, Yang L. A pilot trial of Convolution Neural Network for automatic retention-monitoring of capsule endoscopes in the stomach and duodenal bulb. Sci Rep 2020; 10:4103. [PMID: 32139758 PMCID: PMC7057987 DOI: 10.1038/s41598-020-60969-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2019] [Accepted: 02/12/2020] [Indexed: 02/05/2023] Open
Abstract
The retention of a capsule endoscope (CE) in the stomach and the duodenal bulb during the examination is a troublesome problem, which can make the medical staff spend several hours observing whether the CE enters the descending segment of the duodenum (DSD). This paper investigated and evaluated the Convolution Neural Network (CNN) for automatic retention-monitoring of the CE in the stomach or the duodenal bulb. A trained CNN system based on 180,000 CE images of the DSD, stomach, and duodenal bulb was used to assess its recognition of the accuracy by calculating the area under the receiver operating characteristic curve (ROC-AUC), sensitivity and specificity. The AUC for distinguishing the DSD was 0.984. The sensitivity, specificity, positive predictive value, and negative predictive value of the CNN were 97.8%, 96.0%, 96.1% and 97.8%, respectively, at a cut-off value of 0.42 for the probability score. The deviated rate of the time into the DSD marked by the CNN at less than ±8 min was 95.7% (P < 0.01). These results indicate that the CNN for automatic retention-monitoring of the CE in the stomach or the duodenal bulb can be used as an efficient auxiliary measure in the clinical practice.
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Affiliation(s)
- Tao Gan
- Department of Gastroenterology and Hepatology, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, China
| | - Shuaicheng Liu
- School of Information and Communication Engineering, University of Electronic Science and Technology of China, Chengdu, 611731, Sichuan, China
| | - Jinlin Yang
- Department of Gastroenterology and Hepatology, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, China
| | - Bing Zeng
- School of Information and Communication Engineering, University of Electronic Science and Technology of China, Chengdu, 611731, Sichuan, China
| | - Li Yang
- Department of Gastroenterology and Hepatology, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, China.
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Ding Z, Shi H, Zhang H, Meng L, Fan M, Han C, Zhang K, Ming F, Xie X, Liu H, Liu J, Lin R, Hou X. Gastroenterologist-Level Identification of Small-Bowel Diseases and Normal Variants by Capsule Endoscopy Using a Deep-Learning Model. Gastroenterology 2019; 157:1044-1054.e5. [PMID: 31251929 DOI: 10.1053/j.gastro.2019.06.025] [Citation(s) in RCA: 176] [Impact Index Per Article: 35.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/07/2018] [Revised: 06/02/2019] [Accepted: 06/17/2019] [Indexed: 02/06/2023]
Abstract
BACKGROUND & AIMS Capsule endoscopy has revolutionized investigation of the small bowel. However, this technique produces a video that is 8-10 hours long, so analysis is time consuming for gastroenterologists. Deep convolutional neural networks (CNNs) can recognize specific images among a large variety. We aimed to develop a CNN-based algorithm to assist in the evaluation of small bowel capsule endoscopy (SB-CE) images. METHODS We collected 113,426,569 images from 6970 patients who had SB-CE at 77 medical centers from July 2016 through July 2018. A CNN-based auxiliary reading model was trained to differentiate abnormal from normal images using 158,235 SB-CE images from 1970 patients. Images were categorized as normal, inflammation, ulcer, polyps, lymphangiectasia, bleeding, vascular disease, protruding lesion, lymphatic follicular hyperplasia, diverticulum, parasite, and other. The model was further validated in 5000 patients (no patient was overlap with the 1970 patients in the training set); the same patients were evaluated by conventional analysis and CNN-based auxiliary analysis by 20 gastroenterologists. If there was agreement in image categorization between the conventional analysis and CNN model, no further evaluation was performed. If there was disagreement between the conventional analysis and CNN model, the gastroenterologists re-evaluated the image to confirm or reject the CNN categorization. RESULTS In the SB-CE images from the validation set, 4206 abnormalities in 3280 patients were identified after final consensus evaluation. The CNN-based auxiliary model identified abnormalities with 99.88% sensitivity in the per-patient analysis (95% CI, 99.67-99.96) and 99.90% sensitivity in the per-lesion analysis (95% CI, 99.74-99.97). Conventional reading by the gastroenterologists identified abnormalities with 74.57% sensitivity (95% CI, 73.05-76.03) in the per-patient analysis and 76.89% in the per-lesion analysis (95% CI, 75.58-78.15). The mean reading time per patient was 96.6 ± 22.53 minutes by conventional reading and 5.9 ± 2.23 minutes by CNN-based auxiliary reading (P < .001). CONCLUSIONS We validated the ability of a CNN-based algorithm to identify abnormalities in SB-CE images. The CNN-based auxiliary model identified abnormalities with higher levels of sensitivity and significantly shorter reading times than conventional analysis by gastroenterologists. This algorithm provides an important tool to help gastroenterologists analyze SB-CE images more efficiently and more accurately.
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Affiliation(s)
- Zhen Ding
- Department of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Huiying Shi
- Department of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Hao Zhang
- Ankon Medical Technologies Co, Ltd, Shanghai, China
| | - Lingjun Meng
- Department of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Mengke Fan
- Department of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Chaoqun Han
- Department of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Kun Zhang
- Department of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Fanhua Ming
- Ankon Medical Technologies Co, Ltd, Shanghai, China
| | - Xiaoping Xie
- Department of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Hao Liu
- Ankon Medical Technologies Co, Ltd, Shanghai, China
| | - Jun Liu
- Department of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Rong Lin
- Department of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China.
| | - Xiaohua Hou
- Department of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
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Blanco-Velasco G, Solórzano-Pineda O, Mendoza-Segura C, Hernández-Mondragón O. PillCam SB3 vs. PillCam SB2: Can technologic advances in capsule endoscopy improve diagnostic yield in patients with small bowel bleeding? REVISTA DE GASTROENTEROLOGÍA DE MÉXICO (ENGLISH EDITION) 2019. [DOI: 10.1016/j.rgmxen.2018.11.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
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Blanco-Velasco G, Solórzano-Pineda OM, Mendoza-Segura C, Hernández-Mondragón O. PillCam SB3 vs. PillCam SB2: Can technologic advances in capsule endoscopy improve diagnostic yield in patients with small bowel bleeding? REVISTA DE GASTROENTEROLOGÍA DE MÉXICO 2019; 84:467-471. [PMID: 31000460 DOI: 10.1016/j.rgmx.2018.11.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2018] [Revised: 09/24/2018] [Accepted: 11/02/2018] [Indexed: 12/22/2022]
Abstract
INTRODUCTION AND OBJECTIVE The SB3 capsule endoscopy system has better image resolution and the capacity to increase the number of images from 2 to 6 frames per second. Small bowel bleeding is the most common indication. The aim To determine if the advances in capsule endoscopy technology increase diagnostic yield in cases of small bowel bleeding, according to the Saurin classification. MATERIAL AND METHODS A retrospective, observational, analytic, cross-sectional study included 100 SB2 capsule endoscopies and 100 SB3 capsule endoscopies in patients that presented with small bowel bleeding. The findings obtained with both systems were evaluated. The lesions identified by the two capsules were categorized using the Saurin classification. The relation between the lesions identified with the SB3 and those found with the SB2 was identified through a logistic regression analysis. RESULTS In the SB2 capsule endoscopy group, 60% were women, patient age was 59 years (42.2, 73), and intestinal transit time was 271min (182, 353). In the SB3 group, 57% were women, patient age was 60 years (42.5, 73), and intestinal transit time was 277min (182, 352). There were no significant differences in the identification of P0 and P2 lesions between the two systems. The SB3 capsule endoscope identified more P1 lesions (p=0.020, OR: 2.35, 95% CI:1.12-4.90). There was no significant difference in relation to location of the lesions in the small bowel. CONCLUSIONS A greater number of P1 lesions were detected through the technologic advances made in SB3 capsule endoscopy, but the diagnostic yield for P2 lesions was not modified.
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Affiliation(s)
- G Blanco-Velasco
- Servicio de Endoscopia, Hospital de Especialidades, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Ciudad de México, México.
| | - O M Solórzano-Pineda
- Servicio de Endoscopia, Hospital de Especialidades, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Ciudad de México, México
| | - C Mendoza-Segura
- Servicio de Endoscopia, Hospital de Especialidades, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Ciudad de México, México
| | - O Hernández-Mondragón
- Servicio de Endoscopia, Hospital de Especialidades, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Ciudad de México, México
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