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Lee C, Orellana M, Benharash P, Hawkins A, Khan A, Lee H. The use of surgical intervention for lower gastrointestinal bleeding and its association with clinical outcomes and resource use. Surgery 2023; 173:1346-1351. [PMID: 37045623 DOI: 10.1016/j.surg.2023.03.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 03/03/2023] [Accepted: 03/08/2023] [Indexed: 04/14/2023]
Abstract
BACKGROUND To assess the use of surgical intervention for lower gastrointestinal bleeding and evaluate its associated factors. METHODS The 2016 to 2019 National Inpatient Sample was queried to identify non-elective adult (≥18 years) hospitalizations for lower gastrointestinal bleeding. The International Classification of Diseases, 10th Revision, codes were used to ascertain patient characteristics, including signs of hemodynamic instability, potential lower gastrointestinal bleed source, and transfusion of blood products, as well as endoscopic, radiologic, and surgical intervention. Multivariable regression analyses were used to elucidate factors associated with operative management of lower gastrointestinal bleeding and evaluate its associated mortality, length of stay, and hospitalization costs. RESULTS Of an estimated 364,495 patients, 1.7% underwent an operation for lower gastrointestinal bleeding. Compared to those managed conservatively, patients who underwent surgical intervention more commonly had diverticular-related bleeding, signs of hypovolemia, and less frequently underwent endoscopic intervention. After the adjustment of patient and hospital characteristics, ischemic colitis (adjusted odds ratio 7.5, 95% confidence interval 1.8-30.9, ref: hemorrhoids), hemodynamic instability (adjusted odds ratio 1.7, 95% confidence interval 1.5-2.0), and angiographic embolization (adjusted odds ratio 4.9, 95% confidence interval 3.9-6.0, ref: no endoscopic/radiologic intervention) were associated with greater odds of surgical intervention. Additionally, surgical intervention portended greater odds of in-hospital mortality (adjusted odds ratio 6.2, 95% confidence interval 4.5-8.5), a longer length of stay (8.5 days, 95% confidence interval 8.0-9.0), and greater hospitalization cost ($29.1K, 95% confidence interval 26.7K-31.5K). CONCLUSION Operative management of lower gastrointestinal bleeding is rare and associated with significant morbidity and mortality compared to those managed conservatively. However, when surgical intervention is indicated, preoperative patient characteristics should be used to identify those at greater risk of an operation to facilitate early surgical consultation and inform expectations during the perioperative period.
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Affiliation(s)
- Cory Lee
- Cardiovascular Outcomes Research Laboratories, Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA
| | - Manuel Orellana
- Department of Surgery, Harbor-UCLA Medical Center, Torrance, CA
| | - Peyman Benharash
- Cardiovascular Outcomes Research Laboratories, Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA
| | - Alexander Hawkins
- Department of Surgery, Vanderbilt University Medical Center, Nashville, TN
| | - Aimal Khan
- Department of Surgery, Vanderbilt University Medical Center, Nashville, TN
| | - Hanjoo Lee
- Department of Surgery, Harbor-UCLA Medical Center, Torrance, CA.
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Werner DJ, Wenzel N, Abusalim N, Kiesslich R, Baar T, Tresch A, Rey JW. Unmasking lower gastrointestinal bleeding under administration of norepinephrine. World J Radiol 2022; 14:375-383. [PMID: 36605886 PMCID: PMC9808013 DOI: 10.4329/wjr.v14.i12.375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Revised: 10/24/2022] [Accepted: 12/01/2022] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND Bleeding in the gastrointestinal tract is common and transarterial embolization enables the clinician to control gastrointestinal bleeding. Contrast extravasation is a prerequisite for successful embolization. Provocative angiography is helpful in the detection of elusive bleeding.
AIM We performed a retrospective analysis of angiographic treatment in patients with lower gastrointestinal hemorrhage and initially negative angiographies, as well as the role of norepinephrine (NE) in unmasking bleeding.
METHODS We analyzed 41 patients with lower gastrointestinal bleeding after angiography who had undergone treatment over a period of 10 years. All patients had a positive shock index and needed intensive care.
RESULTS In three of four patients, angiography disclosed the site of bleeding when NE was used during the procedure for hemodynamic stabilization.
CONCLUSION We suggest that angiography performed after the administration of NE in unstable patients with gastrointestinal bleeding and an initially negative angiography has the potential to unmask bleeding sites for successful embolization. However, this statement must be confirmed in prospective studies.
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Affiliation(s)
- David John Werner
- Department of Radiology, Helios Dr. Horst-Schmidt-Clinic, Wiesbaden 65199, Hessen, Germany
- Radiologie Rhein-Nahe, Krankenhaus St. Marienwörth, Bad Kreuznach 55543, Rheinland-Pfalz, Germany
| | - Nicolai Wenzel
- Department of Radiology, Helios Dr. Horst-Schmidt-Clinic, Wiesbaden 65199, Hessen, Germany
| | - Nael Abusalim
- Department of Radiology, Helios Dr. Horst-Schmidt-Clinic, Wiesbaden 65199, Hessen, Germany
- Department of Diagnostic and Interventional Radiology, Medical Center Hanau, Hanau 63450, Hessen, Germany
| | - Ralf Kiesslich
- Department of Internal Medicine II, Helios Dr. Horst-Schmidt-Clinic, Wiesbaden 65199, Hessen, Germany
| | - Till Baar
- Institute for Medical Statistics and Computational Biology, Faculty of Medicine, University of Cologne, Cologne 50923, Nordrhein-Westfalen, Germany
| | - Achim Tresch
- Institute for Medical Statistics and Computational Biology, Faculty of Medicine, University of Cologne, Cologne 50923, Nordrhein-Westfalen, Germany
| | - Johannes Wilhelm Rey
- Department of Internal Medicine II, Helios Dr. Horst-Schmidt-Clinic, Wiesbaden 65199, Hessen, Germany
- Department of Gastroenterology and Endoscopy, Medical Center Osnabrueck, Osnabrueck 49076, Niedersachsen, Germany
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3
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Ayude Galego M, Rodríguez González MM, Nogueira Sentíes D, Iglesias Doallo A, Fernández Fernández N, Alonso Lorenzo S, Gómez Rodríguez A, Quintáns Pinazas N, Romero Mosquera B, Germade Martínez A, Rodríguez de Jesús AJ, Vázquez Rodríguez S, Rodríguez Prada JI, García Morales N. Encuesta internacional on-line sobre el manejo de la hemorragia digestiva baja grave. ¿Lo tenemos claro? GASTROENTEROLOGÍA Y HEPATOLOGÍA 2022; 46:282-287. [PMID: 35964809 DOI: 10.1016/j.gastrohep.2022.07.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Revised: 06/27/2022] [Accepted: 07/21/2022] [Indexed: 02/07/2023]
Abstract
BACKGROUND AND AIMS The diagnostic and therapeutic strategy in severe lower gastrointestinal bleeding (LGIB) varies depending on the patient's clinical situation. Actual clinical practice guidelines propose different management strategies. We aim to know the attitude of the gastroenterologists from different hospitalary centers in the management of this entity. METHODS Descriptive and observational study using an on-line questionnaire, addressed to gastroenterologists in Spain and Latin America, in December 2021. RESULTS We included 281 anonymous questionnaires of gastroenterologists from Spain and Latin America. Diagnostic and therapeutic management of severe LGIB was heterogeneous among the participants. Regarding to the first diagnostic modalities they showed variability between performing computed tomography angiography (CTA) (44.5%), gastroscopy (33.1%), colonoscopy (20.6%) and arteriography (1.1%). The therapeutic attitude after a positive CTA mostly varied between performing arteriography (38.1%) and colonoscopy (44.1%). If negative CTA, in the majority of cases a gastroscopy was performed. If the patient needed intensive critical unit (ICU) care and to undergo colonoscopy, most participants performed an urgent colonoscopy (<24h) (31% always, 43.4% in most cases); while if the patient did not require ICU admission this percentage was lower (10% always, 33.8% in most cases). The 40.9% of the participants admitted having doubts about the management of this patients and the 98.2% considered the need for a creation of an action protocol. CONCLUSIONS There is a high interhospitalary variability on the management of severe lower gastrointestinal bleeding among gastroenterologists. It is necessary to unify the diagnostic and therapeutic management of this pathology.
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Werner DJ, Baar T, Kiesslich R, Wenzel N, Abusalim N, Tresch A, Rey JW. Endoscopic hemostasis makes the difference: Angiographic treatment in patients with lower gastrointestinal bleeding. World J Gastrointest Endosc 2021; 13:221-232. [PMID: 34326943 PMCID: PMC8311471 DOI: 10.4253/wjge.v13.i7.221] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Revised: 06/17/2021] [Accepted: 07/07/2021] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND The large majority of gastrointestinal bleedings subside on their own or after endoscopic treatment. However, a small number of these may pose a challenge in terms of therapy because the patients develop hemodynamic instability, and endoscopy does not achieve adequate hemostasis. Interventional radiology supplemented with catheter angiography (CA) and transarterial embolization have gained importance in recent times.
AIM To evaluate clinical predictors for angiography in patients with lower gastrointestinal bleeding (LGIB).
METHODS We compared two groups of patients in a retrospective analysis. One group had been treated for more than 10 years with CA for LGIB (n = 41). The control group had undergone non-endoscopic or endoscopic treatment for two years and been registered in a bleeding registry (n = 92). The differences between the two groups were analyzed using decision trees with the goal of defining clear rules for optimal treatment.
RESULTS Patients in the CA group had a higher shock index, a higher Glasgow-Blatchford bleeding score (GBS), lower serum hemoglobin levels, and more rarely achieved hemostasis in primary endoscopy. These patients needed more transfusions, had longer hospital stays, and had to undergo subsequent surgery more frequently (P < 0.001).
CONCLUSION Endoscopic hemostasis proved to be the crucial difference between the two patient groups. Primary endoscopic hemostasis, along with GBS and the number of transfusions, would permit a stratification of risks. After prospective confirmation of the present findings, the use of decision trees would permit the identification of patients at risk for subsequent diagnosis and treatment based on interventional radiology.
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Affiliation(s)
- David John Werner
- Radiologie Rhein-Nahe, Krankenhaus am St. Marienwörth, Bad Kreuznach 55543, RLP, Germany
- Department of Radiology, Helios Dr. Horst-Schmidt-Clinic, Germany, Wiesbaden 65199, Hessen, Germany
| | - Till Baar
- Institute for Medical Statistics and Computational Biology, Faculty of Medicine, University of Cologne, Germany, Cologne 50923, NRW, Germany
| | - Ralf Kiesslich
- Department of Internal Medicine II, Helios Dr. Horst-Schmidt-Clinic, Wiesbaden, Germany, Wiesbaden 65199, Hessen, Germany
| | - Nicolai Wenzel
- Department of Radiology, Helios Dr. Horst-Schmidt-Clinic, Germany, Wiesbaden 65199, Hessen, Germany
| | - Nael Abusalim
- Department of Radiology, Helios Dr. Horst-Schmidt-Clinic, Germany, Wiesbaden 65199, Hessen, Germany
- Department of Diagnostic and Interventional Radiology, Medical Center Hanau, Germany, Hanau 63450, Hessen, Germany
| | - Achim Tresch
- Institute for Medical Statistics and Computational Biology, Faculty of Medicine, University of Cologne, Germany, Cologne 50923, NRW, Germany
- CECAD, University of Cologne, Germany, Cologne 50923, NRW, Germany
- Center for Data and Simulation Science, University of Cologne, Germany, Cologne 50923, NRW, Germany
| | - Johannes Wilhelm Rey
- Department of Gastroenterology and Endoscopy, Medical Center Osnabrueck, Germany, Osnabrueck 49076, Niedersachsen, Germany
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Zhang X, Wang L, Fu W, Feng Y, Zeng C, Zhou L, Zhang T, Xu T, Cao J, Li Z, Chen Y. 18F-PEG1-Vinyl Sulfone-Labeled Red Blood Cells as Positron Emission Tomography Agent to Image Intra-Abdominal Bleeding. Front Med (Lausanne) 2021; 8:646862. [PMID: 34291057 PMCID: PMC8287037 DOI: 10.3389/fmed.2021.646862] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Accepted: 06/02/2021] [Indexed: 12/01/2022] Open
Abstract
18F-Labeled blood pool agents (BPAs) have attracted great attention for identifying bleeding sites. However, many BPAs are not sufficiently evaluated partially due to the limitations of labeling methods. In our previous work, we noticed that 18F-PEG1-vinyl sulfone (18F-VS) could efficiently label red blood cells (RBCs) ex vivo and in situ. However, its application as BPA is not fully evaluated. In this study, we systematically explored the feasibility of using 18F-VS-labeled RBCs as a positron emission tomography (PET) BPA for intra-abdominal bleeding diagnosis. In brief, we first optimized the labeling conditions, which lead to an 80% labeling yield of RBCs after incubating with 18F-VS in phosphate-buffered saline (PBS) at 37°C for 20 min. 18F-VS-labeled RBCs were found to be stable in vitro, which could simplify its transportation/storage for in vivo applications. In normal rat PET study, the cardiovascular system could be clearly imaged up to 5 h post injection (p.i.). An intra-abdominal hemorrhage rat model demonstrated that the 18F-VS-labeled RBCs clearly showed the dynamic changes of extravascular radioactivity due to intra-abdominal hemorrhage. Validation in the model of gastrointestinal bleeding clearly demonstrated the great potential of using 18F-VS-labeled RBCs as a BPA, which could be further evaluated in future studies.
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Affiliation(s)
- Xinyi Zhang
- Department of Nuclear Medicine, The Affiliated Hospital of Southwest Medical University, Luzhou, China.,Nuclear Medicine and Molecular Imaging Key Laboratory of Sichuan, Luzhou, China.,Academician (Expert) Workstation of Sichuan, Luzhou, China
| | - Li Wang
- Department of Nuclear Medicine, The Affiliated Hospital of Southwest Medical University, Luzhou, China.,Nuclear Medicine and Molecular Imaging Key Laboratory of Sichuan, Luzhou, China.,Academician (Expert) Workstation of Sichuan, Luzhou, China
| | - Wenhui Fu
- Department of Nuclear Medicine, The Affiliated Hospital of Southwest Medical University, Luzhou, China.,Nuclear Medicine and Molecular Imaging Key Laboratory of Sichuan, Luzhou, China.,Academician (Expert) Workstation of Sichuan, Luzhou, China
| | - Yue Feng
- Department of Nuclear Medicine, The Affiliated Hospital of Southwest Medical University, Luzhou, China.,Nuclear Medicine and Molecular Imaging Key Laboratory of Sichuan, Luzhou, China.,Academician (Expert) Workstation of Sichuan, Luzhou, China
| | - Chengrun Zeng
- Department of Nuclear Medicine, The Affiliated Hospital of Southwest Medical University, Luzhou, China.,Nuclear Medicine and Molecular Imaging Key Laboratory of Sichuan, Luzhou, China.,Academician (Expert) Workstation of Sichuan, Luzhou, China
| | - Liu Zhou
- Department of Nuclear Medicine, The Affiliated Hospital of Southwest Medical University, Luzhou, China.,Nuclear Medicine and Molecular Imaging Key Laboratory of Sichuan, Luzhou, China.,Academician (Expert) Workstation of Sichuan, Luzhou, China.,School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Tao Zhang
- Department of Radiology, Lineberger Comprehensive Cancer Center, and Biomedical Research Imaging Center, University of North Carolina, Chapel Hill, NC, United States
| | - Tingting Xu
- Department of Nuclear Medicine, The Affiliated Hospital of Southwest Medical University, Luzhou, China.,Nuclear Medicine and Molecular Imaging Key Laboratory of Sichuan, Luzhou, China.,Academician (Expert) Workstation of Sichuan, Luzhou, China
| | - Jianpeng Cao
- Department of Nuclear Medicine, The Affiliated Hospital of Southwest Medical University, Luzhou, China.,Nuclear Medicine and Molecular Imaging Key Laboratory of Sichuan, Luzhou, China.,Academician (Expert) Workstation of Sichuan, Luzhou, China
| | - Zibo Li
- Department of Radiology, Lineberger Comprehensive Cancer Center, and Biomedical Research Imaging Center, University of North Carolina, Chapel Hill, NC, United States
| | - Yue Chen
- Department of Nuclear Medicine, The Affiliated Hospital of Southwest Medical University, Luzhou, China.,Nuclear Medicine and Molecular Imaging Key Laboratory of Sichuan, Luzhou, China.,Academician (Expert) Workstation of Sichuan, Luzhou, China
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6
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Brahmbhatt A, Rao P, Cantos A, Butani D. Time to Catheter Angiography for Gastrointestinal Bleeding after Prior Positive Investigation Does Not Affect Bleed Identification. J Clin Imaging Sci 2020; 10:16. [PMID: 32363078 PMCID: PMC7193149 DOI: 10.25259/jcis_132_2019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Accepted: 12/31/2019] [Indexed: 12/13/2022] Open
Abstract
Objective: To determine, time to angiography for patients with positive gastrointestinal bleeding (GIB) on prior investigation (endoscopy [ES], nuclear medicine [NM] Tc99m red blood cells (RBC) scan, or computed tomography angiography), affects angiographic bleed identification. Materials and Methods: Visceral Angiograms performed from January 2012 to August 2017 were evaluated. Initial angiograms performed for GIB were included in the study. Exclusion criteria included recent abdominal surgery or procedure (30 days), empiric embolization (embolization without visualized active bleeding), and use of vasodilators, or subsequent angiogram. Timing and results of ES, NM Tc99m RBC scan, or computed tomography angiogram and catheter angiogram were recorded. In addition, age, gender, angiogram time, anti- platelet therapy, anti-coagulation therapy, bleed location, international normalized ratio, and units of packed RBCs received in the 24 h before catheter angiography were included in the study. Results: One hundred and seventy angiograms were included in the final analysis. Forty-three angiograms resulted in the identification of an active bleed (68.9 years, and 67.4% male). All of these patients were embolized successfully. One hundred and twenty-seven angiograms failed to identify an active bleed (70.4 years, and 49.6% male). No significance was found across the two groups with respect to time from prior positive investigation. Receiver operating characteristic analysis demonstrated that units of packed RBCs received in the preceding 24 h were correlated with positive bleed identification on catheter angiography. Conclusion: Time to angiography from prior positive investigation, including ES, NM Tc99m RBC scan, or computed tomography angiogram does not correlate with positive angiographic outcomes. Increasing units of packed RBCs administered in the 24 h before angiogram do correlate with positive angiographic findings.
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Affiliation(s)
- Akshaar Brahmbhatt
- Departments of Radiology, University of Rochester Medical Center, Rochester, New York, United States
| | - Pranay Rao
- Departments of Radiology, University of Rochester Medical Center, Rochester, New York, United States
| | - Andrew Cantos
- Departments of Imaging Sciences, University of Rochester Medical Center, Rochester, New York, United States
| | - Devang Butani
- Departments of Imaging Sciences, University of Rochester Medical Center, Rochester, New York, United States
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7
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Raña-Garibay R, Salgado-Nesme N, Carmona-Sánchez R, Remes-Troche J, Aguilera-Carrera J, Alonso-Sánchez L, Arnaud-Carreño C, Charúa-Guindic L, Coss-Adame E, de la Torre-Bravo A, Espinosa-Medina D, Esquivel-Ayanegui F, Roesch-Dietlen F, López-Colombo A, Muñoz-Torres J, Noble-Lugo A, Rojas-Mendoza F, Suazo-Barahona J, Stoopen-Rometti M, Torres-Flores E, Vallejo-Soto M, Vergara-Fernández O. The Mexican consensus on the diagnosis and treatment of diverticular disease of the colon. REVISTA DE GASTROENTEROLOGÍA DE MÉXICO (ENGLISH EDITION) 2019. [DOI: 10.1016/j.rgmxen.2019.01.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
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8
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Raña-Garibay R, Salgado-Nesme N, Carmona-Sánchez R, Remes-Troche JM, Aguilera-Carrera J, Alonso-Sánchez L, Arnaud-Carreño C, Charúa-Guindic L, Coss-Adame E, de la Torre-Bravo A, Espinosa-Medina D, Esquivel-Ayanegui F, Roesch-Dietlen F, López-Colombo A, Muñoz-Torres JI, Noble-Lugo A, Rojas-Mendoza F, Suazo-Barahona J, Stoopen-Rometti M, Torres-Flores E, Vallejo-Soto M, Vergara-Fernández O. The Mexican consensus on the diagnosis and treatment of diverticular disease of the colon. REVISTA DE GASTROENTEROLOGIA DE MEXICO (ENGLISH) 2019; 84:220-240. [PMID: 31014749 DOI: 10.1016/j.rgmx.2019.01.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Revised: 12/05/2018] [Accepted: 01/10/2019] [Indexed: 06/09/2023]
Abstract
Since the publication of the 2008 guidelines on the diagnosis and treatment of diverticular disease of the colon by the Asociación Mexicana de Gastroenterología, significant advances have been made in the knowledge of that disease. A systematic review of articles published in the medical literature from January 2008 to July 2018 was carried out to revise and update the 2008 guidelines and provide new evidence-based recommendations. All high-quality articles in Spanish and English published within that time frame were included. The final versions of the 43 statements accepted in the three rounds of voting, utilizing the Delphi method, were written, and the quality of evidence and strength of the recommendations were established for each statement, utilizing the GRADE system. The present consensus contains new data on the definition, classification, epidemiology, pathophysiology, and risk factors of diverticular disease of the colon. Special emphasis is given to the usefulness of computed tomography and colonoscopy, as well as to the endoscopic methods for controlling bleeding. Outpatient treatment of uncomplicated diverticulitis is discussed, as well as the role of rifaximin and mesalazine in the management of complicated acute diverticulitis. Both its minimally invasive alternatives and surgical options are described, stressing their indications, limitations, and contraindications. The new statements provide guidelines based on updated scientific evidence. Each statement is discussed, and its quality of evidence and the strength of the recommendation are presented.
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Affiliation(s)
| | - N Salgado-Nesme
- División de Cirugía, Instituto Nacional de Ciencias Médicas y Nutrición «Salvador Zubirán», Ciudad de México, México
| | - R Carmona-Sánchez
- Unidad de Médica Ambulatoria Christus Muguerza, San Luis Potosí, S.L.P., México.
| | - J M Remes-Troche
- Laboratorio de Fisiología Digestiva y Motilidad Gastrointestinal, Instituto de Investigaciones Médico Biológicas, Universidad Veracruzana, Veracruz, Veracruz, México
| | - J Aguilera-Carrera
- Hospital de Especialidades Médicas de la Salud, San Luis Potosí, S.L.P., México
| | | | - C Arnaud-Carreño
- Departamento de Cirugía, Hospital General «Dr. Aurelio Valdivieso», Secretaría de Salud del Estado de Oaxaca, Oaxaca, Oaxaca, México
| | | | - E Coss-Adame
- Departamento de Gastroenterología y Laboratorio de Motilidad Gastrointestinal, Instituto Nacional de Ciencias Médicas y Nutrición «Salvador Zubirán», Ciudad de México, México
| | | | | | - F Esquivel-Ayanegui
- Hospital General «Dr. Miguel Silva», Secretaría de Salud de Michoacán, Morelia, Michoacán, México
| | - F Roesch-Dietlen
- Instituto de Investigaciones Médico Biológicas, Universidad Veracruzana, Veracruz, Veracruz, México
| | - A López-Colombo
- Direccción de Educación e Investigación, UMAE Hospital de Especialidades CMN Manuel Ávila Camacho, Instituto Mexicano del Seguro Social, Puebla, Puebla, México
| | - J I Muñoz-Torres
- Facultad de Medicina, Universidad Autónoma de Baja California, Mexicali, BC, México
| | | | | | - J Suazo-Barahona
- Centro de Enfermedades Digestivas, Hospital del Valle, San Pedro Sula, Honduras
| | - M Stoopen-Rometti
- Departamento de Radiología e Imagen, CT Scanner Lomas Altas, Ciudad de México, México
| | - E Torres-Flores
- Hospital General de Zona # 1, Instituto Mexicano del Seguro Social, Pachuca, Hidalgo, México
| | | | - O Vergara-Fernández
- División de Cirugía, Instituto Nacional de Ciencias Médicas y Nutrición «Salvador Zubirán», Ciudad de México, México
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