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Thorndal C, Skau B, Al-Najami I, Kaalby L, Baatrup G, Koulaouzidis A, Deding U. Selected comorbidities increases the likelihood of an incomplete colonoscopy during colorectal cancer screening. Scand J Gastroenterol 2025; 60:283-291. [PMID: 40055880 DOI: 10.1080/00365521.2025.2465623] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/16/2024] [Revised: 02/03/2025] [Accepted: 02/05/2025] [Indexed: 04/02/2025]
Abstract
OBJECTIVE The risk of incomplete colonoscopy is associated with demographic factors and general comorbidity. However, focus on specific comorbidities is limited. This study aimed to investigate the association between selected comorbidities and incomplete colonoscopy in colorectal cancer (CRC) screening. METHODS This register-based study included 71,973 Danish screening participants, undergoing colonoscopy after positive fecal immunochemical test. The selected comorbidities were divided into hematological disease, endocrine disease (nondiabetes), endocrine disease (diabetes related), upper gastrointestinal (GI) disease, lower GI disease, other diseases of digestive system, hepatobiliary and pancreatic (HBP) disease, CRC, intraabdominal cancer (except CRC), and mental disease. Outcomes were incomplete colonoscopy due to poor bowel preparation and other reasons. Multivariate logistic regression models were applied. RESULTS Of 5,428 (7.5%) incomplete colonoscopies, 2,625 (3.6%) were due to poor bowel preparation and 2,803 (3.9%) due to other reasons. Individuals with specific comorbidities were compared to those without, exhibiting varying odds ratios (OR) for incomplete colonoscopy. For poor bowel preparation, ORs were 1.20 (95%CI: 1.04;1.39), 1.43 (95%CI: 1.30;1.56), 1.86 (95%CI: 1.66;2.09), 1.27 (95%CI: 1.12;1.43), and 1.64 (95%CI: 1.47;1.83) for hematological, endocrine (nondiabetes), endocrine (diabetes related), HBP, and mental disease, respectively, and 1.29 (95%CI: 1.09;1.52) for intraabdominal cancer (except CRC). Incomplete colonoscopies due to other reasons showed ORs of 1.24 (95%CI: 1.08;1.43), 1.18 (95%CI: 1.03;1.36), 1.19 (95%CI: 1.05;1.35), and 1.30 (95%CI: 1.15;1.47) for hematological, endocrine (diabetes related), HBP, and mental disease, respectively, and 1.35 (95%CI: 1.15;1.60) for intra-abdominal cancer (except CRC). CONCLUSION Participants with specific comorbidities had significantly higher probability of having an incomplete colonoscopy, suggesting that certain comorbidities could be used prospectively as a predictive factor.
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Affiliation(s)
- Camilla Thorndal
- Department of Surgery, Odense University Hospital, Svendborg, Denmark
| | - Birgitte Skau
- OPEN, Open Patient Data Explorative Network, Odense University Hospital, Region of Southern Denmark, Odense, Denmark
| | - Issam Al-Najami
- Department of Surgery, Odense University Hospital, Svendborg, Denmark
- Department of Clinical Research, University of Southern Denmark, Odense, Denmark
| | - Lasse Kaalby
- Department of Surgery, Odense University Hospital, Svendborg, Denmark
- Department of Clinical Research, University of Southern Denmark, Odense, Denmark
| | - Gunnar Baatrup
- Department of Surgery, Odense University Hospital, Svendborg, Denmark
- Department of Clinical Research, University of Southern Denmark, Odense, Denmark
| | - Anastasios Koulaouzidis
- Department of Surgery, Odense University Hospital, Svendborg, Denmark
- Department of Clinical Research, University of Southern Denmark, Odense, Denmark
- Department of Medicine, Odense University Hospital, Svendborg, Denmark
- Department of Social Medicine and Public Health, Pomeranian Medical University, Szczecin, Poland
| | - Ulrik Deding
- Department of Surgery, Odense University Hospital, Svendborg, Denmark
- Department of Clinical Research, University of Southern Denmark, Odense, Denmark
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Lima Capela T, Cúrdia Gonçalves T, Rosa B, Cotter J. Best Approach for Incomplete Colonoscopy: Colon Capsule Endoscopy or Repeat Conventional Colonoscopy? GE - PORTUGUESE JOURNAL OF GASTROENTEROLOGY 2024:1-9. [DOI: 10.1159/000542599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2025]
Abstract
Background: The most appropriate strategy for completing a previous incomplete colonoscopy (IC) is not standardized. We aimed to compare the efficacy and safety of two strategies for completing a previous IC: colon capsule endoscopy (CCE) versus repeat conventional colonoscopy. Methods: A retrospective cohort study that included consecutive adult patients referred to our center after IC under sedation due to irreducible loop formation or colonic fixed angulation was performed. Patients underwent CCE (PillCam COLON2 Medtronic®) or repetition of conventional colonoscopy under sedation. In this setting, an appropriate CCE progression was defined as the capsule reaching the segment achieved during the previous IC. Repeated conventional colonoscopy was considered complete when cecal intubation was accomplished. We compared the rate of appropriate CCE colon progression with the cecal intubation rate from repeated conventional colonoscopy. Quality of colon preparation, diagnostic yield, and rate of adverse events for CCE and colonoscopy was also analyzed. Results: A total of 192 CCE and 181 colonoscopies were performed for IC, primarily due to fixed angulation of the left colon (69.2%, n = 258). There were no significant differences between the two groups (CCE vs. colonoscopy) concerning age, sex, overweight/obesity status, previous abdominal surgery, and reasons for IC. The rate of appropriate colon progression with CCE was not significantly different from the cecal intubation rate of repeated colonoscopy (95.3% vs. 90.1%, p = 0.073, respectively), even after adjusting for the quality of colon preparation (p = 0.122), which differed significantly between the groups (76.0% vs. 92.8%, p < 0.001, respectively). There were no significant differences in overall colorectal findings identified between the CCE and colonoscopy groups (55.2% vs. 62.4%, p = 0.172, respectively), and no adverse events were reported in either group. Conclusions: Our findings suggest that both CCE and repeat conventional colonoscopy are effective and safe options for completing a previous IC.
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Odds of Incomplete Colonoscopy in Colorectal Cancer Screening Based on Socioeconomic Status. Diagnostics (Basel) 2022; 12:diagnostics12010171. [PMID: 35054338 PMCID: PMC8774541 DOI: 10.3390/diagnostics12010171] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Accepted: 01/07/2022] [Indexed: 02/05/2023] Open
Abstract
The aim of this study is to investigate the association between socioeconomic status (SES) and the risk of having an incomplete colonoscopy (IC) in the Danish Colorectal Cancer (CRC) Screening Program. In this register-based study we included 71,973 participants who underwent colonoscopy after a positive fecal immunochemical test in the Danish CRC Screening Program. The main exposure, SES, was defined by income and education, and the outcome by complete or incomplete colonoscopy. Among the participants, 5428 (7.5%) had an incomplete colonoscopy. The odds ratio (OR) for ICs due to inadequate bowel preparation was 1.67 (95% CI: 1.46; 1.91) for income in the 1 quartile compared to income in the 4th quartile. ORs for income in the 2nd quartile was 1.38 (95% CI: 1.21; 1.56) and 1.17 (95% CI: 1.03; 1.33) for income in the 3rd quartile. For the educational level, an association was seen for high school/vocational education with an OR of 0.87 (95% CI: 0.79; 0.97) compared to higher education. For ICs due to other reasons, the level of income was associated with the risk of having an IC with an OR of 1.19 (95% CI: 1.05; 1.35) in the 1st quartile and an OR of 1.19 (95% CI: 1.06; 1.34) in the 2nd quartile. For the educational level, there were no significant associations. Low income is associated with high risk of having an IC, whereas educational level does not show the same unambiguous association.
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Parsa N, Vemulapalli KC, Rex DK. Performance of radiographic imaging after incomplete colonoscopy for nonmalignant causes in clinical practice. Gastrointest Endosc 2020; 91:1371-1377. [PMID: 32032619 DOI: 10.1016/j.gie.2020.01.043] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Accepted: 01/22/2020] [Indexed: 02/08/2023]
Abstract
BACKGROUND AND AIMS CT colonography (CTC) or barium enema are commonly ordered to complete colorectal imaging after an incomplete colonoscopy. We evaluated the sensitivity of radiographic studies performed for this purpose in clinical practice outside clinical trials. METHODS Adult patients referred to an expert endoscopist for incomplete colonoscopy because of a redundant colon or a difficult sigmoid and who underwent previous radiographic imaging between July 2001 and July 2019 were identified. None of the patients had a malignant obstruction as the cause of incomplete colonoscopy. Data on polyp size, location, and pathology were obtained from colonoscopy and radiology reports. Polyps identified on imaging and colonoscopy were matched based on polyp size and location. RESULTS Among 769 patients referred for incomplete colonoscopy, we identified 65 with a radiographic examination performed within 36 months of colonoscopy at our center. Per-patient sensitivity for CTC was suboptimal (70%) and was very low for barium enema (26.7%). Per-polyp sensitivity for both CTC and barium enema was poor (23.8% and 7.6%). Quality of the examination did not seem to affect procedure sensitivity. CONCLUSIONS Radiographic imaging after incomplete colonoscopy for reasons other than malignant obstruction had poor sensitivity for polyps. Patients with incomplete colonoscopies should be considered for repeat colonoscopy by an expert.
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Affiliation(s)
- Nasim Parsa
- Division of Gastroenterology and Hepatology, University of Missouri, Columbia, Missouri, USA
| | - Krishna C Vemulapalli
- Division of Gastroenterology/Hepatology, Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Douglas K Rex
- Division of Gastroenterology/Hepatology, Indiana University School of Medicine, Indianapolis, Indiana, USA
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Girotra M, Sethi S, Barakat MT, Huang RJ, Friedland S, Ladabaum U, Banerjee S. When Experts Fail: Use of a Short Turning Radius Colonoscope Facilitates Successful Completion of Colonoscopy in Patients with Bowel Fixity. Dig Dis Sci 2020; 65:1429-1435. [PMID: 31630343 DOI: 10.1007/s10620-019-05882-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Accepted: 10/09/2019] [Indexed: 12/09/2022]
Abstract
BACKGROUND Rates of incomplete colonoscopy in non-expert settings range up to 13%. Expert colonoscopists can complete ~ 95% colonoscopies when other endoscopists fail; however, a small number remain incomplete even in expert hands, typically due to bowel fixity. AIMS Pentax Retroview™ (EC-3490TLi) is a new slim colonoscope with a short turning radius (STR) and greater tip deflection (210°), which allows easy maneuverability across sharply angulated/fixed colonic bends. We evaluated the utility of this colonoscope for completing colonoscopies that fail even in the hands of expert colonoscopists. METHODS Retrospective chart review was performed, and main outcomes measured included cecal intubation rate, lesions detected, dosage of sedation used, and complications. RESULTS Using the STR colonoscope, complete colonoscopy to the cecum was possible in 34/37 patients (91.9%). No loss of lumen/blind advancement was necessary in any of the procedures. No adverse events occurred. Among the completed colonoscopies, 6/34 (17.6%) patients had adenomas, all proximal to the site of prior failure, including one advanced adenoma. All failures (n = 3, 8.1%) had a history of cancer surgeries, with peritoneal carcinomatosis/extensively fixed/frozen bowel (two patients) and an additional diverticular stricture with colo-vesical fistula (one patient). CONCLUSION STR colonoscope facilitates completion of a high proportion (91.9%) of colonoscopies that previously failed in expert hands. Its STR allows easy maneuverability across segments of sharp angulation with bowel fixity without need for blind advancement. The use of this colonoscope led to the detection of adenomas in 17.6% of patients, all proximal to the site of prior failed colonoscopy.
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Affiliation(s)
- Mohit Girotra
- Division of Gastroenterology and Hepatology, Stanford University School of Medicine, 300 Pasteur Drive, MC: 5244, Stanford, CA, 94305, USA
| | - Saurabh Sethi
- Division of Gastroenterology and Hepatology, Stanford University School of Medicine, 300 Pasteur Drive, MC: 5244, Stanford, CA, 94305, USA
| | - Monique T Barakat
- Division of Gastroenterology and Hepatology, Stanford University School of Medicine, 300 Pasteur Drive, MC: 5244, Stanford, CA, 94305, USA
| | - Robert J Huang
- Division of Gastroenterology and Hepatology, Stanford University School of Medicine, 300 Pasteur Drive, MC: 5244, Stanford, CA, 94305, USA
| | - Shai Friedland
- Division of Gastroenterology and Hepatology, Stanford University School of Medicine, 300 Pasteur Drive, MC: 5244, Stanford, CA, 94305, USA
| | - Uri Ladabaum
- Division of Gastroenterology and Hepatology, Stanford University School of Medicine, 300 Pasteur Drive, MC: 5244, Stanford, CA, 94305, USA
| | - Subhas Banerjee
- Division of Gastroenterology and Hepatology, Stanford University School of Medicine, 300 Pasteur Drive, MC: 5244, Stanford, CA, 94305, USA.
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Baltes P, Bota M, Albert J, Philipper M, Hörster HG, Hagenmüller F, Steinbrück I, Jakobs R, Bechtler M, Hartmann D, Neuhaus H, Charton JP, Mayershofer R, Hohn H, Rösch T, Groth S, Nowak T, Wohlmuth P, Keuchel M. PillCamColon2 after incomplete colonoscopy - A prospective multicenter study. World J Gastroenterol 2018; 24:3556-3566. [PMID: 30131662 PMCID: PMC6102503 DOI: 10.3748/wjg.v24.i31.3556] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Revised: 07/18/2018] [Accepted: 07/21/2018] [Indexed: 02/06/2023] Open
Abstract
AIM To evaluate the ability of PillCamColon2 to visualize colonic segments missed by incomplete optical colonoscopy (OC) and to assess the diagnostic yield.
METHODS This prospective multicentre study included 81 patients from nine centres who underwent second-generation colon capsule endoscopy (CCE) following incomplete OC performed by an experienced gastroenterologist (> 1000 colonoscopies). Patients with stenosis were excluded. According to patient preferences, CCE was performed the following day (protocol A) after staying on clear liquids and 0.75 L Moviprep in the morning or within 30 d after new split-dose Moviprep (protocol B). Boosts consisted of 0.75 L and 0.25 L Moviprep, and phospho-soda was given as a rescue if the capsule was not excreted after seven hours.
RESULTS Seventy-four patients were analysed (51% of them in group A; 49% in group B). Bowel cleansing was adequate in 67% of cases, and CCE could visualize colonic segments missed by incomplete colonoscopy in 90% of patients under protocol A and 97% of patients under protocol B (P = 0.35, n.s.). Significant polyps including adenocarcinoma were detected in 24% of cases. Detection rates for all polyps and significant polyps per patient were similar in both protocols. Polyps were found predominantly in the right colon (86%) in segments that were not reached by OC. Extracolonic findings - such as reflux esophagitis, suspected Barrett esophagus, upper GI-bleeding, gastric polyps, gastric erosions and angiectasia - were detected in eight patients. PillCamColon2 capsule was retained in the ileum of one patient (1.4%) without symptoms and removed during an uneventful resection for unknown Crohn’s disease that was diagnosed as the cause of anemia, which was the indication for colonoscopy. CCE was well tolerated. One patient suffered from self-limiting vomiting after consuming the phospho-soda.
CONCLUSION Second-generation CCE using a low-volume preparation is useful after incomplete OC, and it allows for the detection of additional relevant findings, but cleansing efficiency could be improved.
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Affiliation(s)
- Peter Baltes
- Clinic for Internal Medicine, Bethesda Krankenhaus Bergedorf, Hamburg 21029, Germany
| | - Marc Bota
- Clinic for Internal Medicine, Bethesda Krankenhaus Bergedorf, Hamburg 21029, Germany
| | - Jörg Albert
- Department of Internal Medicine I, Klinikum der JW. Goethe Universität, Frankfurt 60590, Germany
| | | | | | | | - Ingo Steinbrück
- 1st Medical Department, Asklepios Klinikum Altona, Hamburg 22763, Germany
| | - Ralf Jakobs
- Medical Clinic C, Klinikum der Stadt Ludwigshafen, Ludwigshafen 67063, Germany
| | - Matthias Bechtler
- Medical Clinic C, Klinikum der Stadt Ludwigshafen, Ludwigshafen 67063, Germany
| | - Dirk Hartmann
- Clinic for Internal Medicine, Sana Klinikum Lichtenberg, Berlin 10365, Germany
| | - Horst Neuhaus
- Clinic for Internal Medicine, Evangelisches Krankenhaus, Düsseldorf 40217, Germany
| | - Jean-Pierre Charton
- Clinic for Internal Medicine, Evangelisches Krankenhaus, Düsseldorf 40217, Germany
| | | | - Horst Hohn
- Schwerpunktpraxis Gastroenterologie, Koblenz 56068, Germany
| | - Thomas Rösch
- Clinic for Interdisciplinary Endoscopy, University Hospital Eppendorf, Hamburg 20251, Germany
| | - Stefan Groth
- Clinic for Interdisciplinary Endoscopy, University Hospital Eppendorf, Hamburg 20251, Germany
| | - Tanja Nowak
- CorporateHealth International, Hamburg 20149, Germany
| | - Peter Wohlmuth
- Biometry and Data Management, Asklepios Proresearch, Hamburg 20099, Germany
| | - Martin Keuchel
- Clinic for Internal Medicine, Bethesda Krankenhaus Bergedorf, Hamburg 21029, Germany
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Ponte A, Pinho R, Rodrigues A, Proença L, Silva J, Rodrigues JP, Sousa M, Carlos Silva J, Carvalho J. High Efficacy of Repeating Colonoscopy by an Advanced Endoscopist after an Incomplete Colonoscopy. GE-PORTUGUESE JOURNAL OF GASTROENTEROLOGY 2018; 25:285-290. [PMID: 30480045 DOI: 10.1159/000485803] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Accepted: 11/28/2017] [Indexed: 12/25/2022]
Abstract
Background and Aims This study aims to evaluate the role of an advanced endoscopist to study the entire colon after an incomplete colonoscopy. Methods All patients with an elective incomplete colonoscopy performed under deep sedation in our department between January 2010 and October 2016 were included. Patients with a colonic stenosis, an inadequate bowel preparation, or a colonoscopy performed without deep sedation were excluded. Included patients were followed up to evaluate if and what type of subsequent examinations (colonoscopy by an advanced endoscopist, single-balloon enteroscopy [SBE], and/or CT colonography) was performed to complete the study of the entire colon. Lesions found during these subsequent examinations were also recorded. Results Ninety-three patients had an incomplete colonoscopy, with no diagnosis of colorectal cancer (CRC) and a high-risk polyp rate of 5.4% (n = 5). Seventy-seven patients with incomplete colonoscopies underwent subsequent examinations, namely CT colonography in 45.5% (n = 35), colonoscopy by an advanced endoscopist in 53.2% (n = 41), and SBE in 13% (n = 10). In the 49 patients who performed either colonoscopy (n = 39) or SBE (n = 10) by an advanced endoscopist, the cecal intubation rate was 100%, and high-risk polyps were found in 26.5% (n = 13) and CRC in 4.1%. CT colonography revealed findings consistent with polyps and CRC in 22.9% (n = 8) and 2.9% (n = 1) of the cases, respectively. Colonoscopy was further repeated in 6 patients with suspected polyps in CT colonography, confirming the initial diagnosis in 5 patients. Conclusions Colonoscopy by an advanced endoscopist achieved cecal intubation in all patients, representing a good choice after an incomplete colonoscopy.
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Affiliation(s)
- Ana Ponte
- Department of Gastroenterology, Centro Hospitalar Vila Nova de Gaia/Espinho, Vila Nova de Gaia, Portugal
| | - Rolando Pinho
- Department of Gastroenterology, Centro Hospitalar Vila Nova de Gaia/Espinho, Vila Nova de Gaia, Portugal
| | - Adélia Rodrigues
- Department of Gastroenterology, Centro Hospitalar Vila Nova de Gaia/Espinho, Vila Nova de Gaia, Portugal
| | - Luísa Proença
- Department of Gastroenterology, Centro Hospitalar Vila Nova de Gaia/Espinho, Vila Nova de Gaia, Portugal
| | - Joana Silva
- Department of Gastroenterology, Centro Hospitalar Vila Nova de Gaia/Espinho, Vila Nova de Gaia, Portugal
| | - Jaime P Rodrigues
- Department of Gastroenterology, Centro Hospitalar Vila Nova de Gaia/Espinho, Vila Nova de Gaia, Portugal
| | - Mafalda Sousa
- Department of Gastroenterology, Centro Hospitalar Vila Nova de Gaia/Espinho, Vila Nova de Gaia, Portugal
| | - João Carlos Silva
- Department of Gastroenterology, Centro Hospitalar Vila Nova de Gaia/Espinho, Vila Nova de Gaia, Portugal
| | - João Carvalho
- Department of Gastroenterology, Centro Hospitalar Vila Nova de Gaia/Espinho, Vila Nova de Gaia, Portugal
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Rogers MC, Gawron A, Grande D, Keswani RN. Development and validation of an algorithm to complete colonoscopy using standard endoscopes in patients with prior incomplete colonoscopy. Endosc Int Open 2017; 5:E886-E892. [PMID: 28924595 PMCID: PMC5595582 DOI: 10.1055/s-0043-114663] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/26/2016] [Accepted: 05/22/2017] [Indexed: 01/02/2023] Open
Abstract
BACKGROUND AND STUDY AIMS Incomplete colonoscopy may occur as a result of colon angulation (adhesions or diverticulosis), endoscope looping, or both. Specialty endoscopes/devices have been shown to successfully complete prior incomplete colonoscopies, but may not be widely available. Radiographic or other image-based evaluations have been shown to be effective but may miss small or flat lesions, and colonoscopy is often still indicated if a large lesion is identified. The purpose of this study was to develop and validate an algorithm to determine the optimum endoscope to ensure completion of the examination in patients with prior incomplete colonoscopy. PATIENTS AND METHODS This was a prospective cohort study of 175 patients with prior incomplete colonoscopy who were referred to a single endoscopist at a single academic medical center over a 3-year period from 2012 through 2015. Colonoscopy outcomes from the initial 50 patients were used to develop an algorithm to determine the optimal standard endoscope and technique to achieve cecal intubation. The algorithm was validated on the subsequent 125 patients. RESULTS The overall repeat colonoscopy success rate using a standard endoscope was 94 %. The initial standard endoscope specified by the algorithm was used and completed the colonoscopy in 90 % of patients. CONCLUSIONS This study identifies an effective strategy for completing colonoscopy in patients with prior incomplete examination, using widely available standard endoscopes and an algorithm based on patient characteristics and reasons for prior incomplete colonoscopy.
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Affiliation(s)
- Melinda C. Rogers
- Gastroenterology and Hepatology, Northwestern University Feinberg School of Medicine, Chicago, Illinois, United States,Corresponding author Melinda Rogers, MD Gastroenterology and HepatologyNorthwestern University Feinberg School of Medicine676 N St. Claire St, Suite 1400ChicagoIllinois 60611-3008United States+1-312-695-3999
| | - Andrew Gawron
- Gastroenterology and Hepatology, University of Utah School of Medicine, Ringgold Standard Institution, Salt Lake City, Utah, United States
| | - David Grande
- Gastroenterology and Hepatology, Northwestern University Feinberg School of Medicine, Chicago, Illinois, United States
| | - Rajesh N. Keswani
- Gastroenterology and Hepatology, Northwestern University Feinberg School of Medicine, Chicago, Illinois, United States
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