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Nørgård BM, Garvik OS, Zegers FD, Nielsen J, Lund K, Knudsen T, Kjeldsen J. New Surgery and Hospital-diagnosed Infections in Elderly Patients with Inflammatory Bowel Disease Undergoing Surgery: A Nationwide Cohort Study. J Crohns Colitis 2024; 18:1406-1414. [PMID: 38578608 DOI: 10.1093/ecco-jcc/jjae047] [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: 02/01/2024] [Revised: 03/06/2024] [Accepted: 04/04/2024] [Indexed: 04/06/2024]
Abstract
BACKGROUND Elderly patients with inflammatory bowel disease [IBD] are fragile in many respects. Therefore, in these patients, we studied postoperative complications [new abdominal surgery and serious infections after the first IBD surgery]. METHODS This is a nationwide cohort study based on Danish health registries and included patients with IBD undergoing surgery. The study population was split into ulcerative colitis [UC] and Crohn's disease [CD]. The exposed cohort [elderly] constituted those at an age of ≥60 years at first IBD surgery, and the unexposed [adults] those with surgery at the age of 18-59 years. We estimated adjusted hazard ratios [aHRs] of: a] new abdominal surgery within 2 years; and b] serious [hospital-diagnosed] infections within 6 and 12 months. We adjusted for several confounders including type of index surgery [laparoscopic or open]. RESULTS The aHR for a new surgery among elderly with UC and CD were 0.69 [95% CI 0.58-0.83] and 0.98 [95% CI 0.83-1.15], respectively. In elderly with UC, the aHRs of infections within 6 and 12 months after surgery were 1.07 [95% CI 0.81-1.40] and 0.85 [95% CI 0.67-1.08], respectively. In the elderly with CD, the aHRs of infections within 6 and 12 months were 1.45 [95% CI 1.12-1.88] and 1.26 [95% CI 1.00-1.59], respectively. CONCLUSION The elderly with IBD did not have an increased risk of new abdominal surgery within 2 years of the first surgery. Elderly with CD, but not UC, had an increased risk of serious infections within 6 months of surgery.
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Affiliation(s)
- Bente Mertz Nørgård
- Center for Clinical Epidemiology, Odense University Hospital, Odense C, Denmark
- Research Unit of Clinical Epidemiology, Department of Clinical Research, University of Southern Denmark, Odense C, Denmark
| | - Olav Sivertsen Garvik
- Center for Clinical Epidemiology, Odense University Hospital, Odense C, Denmark
- Research Unit of Clinical Epidemiology, Department of Clinical Research, University of Southern Denmark, Odense C, Denmark
| | - Floor Dijkstra Zegers
- Center for Clinical Epidemiology, Odense University Hospital, Odense C, Denmark
- Research Unit of Clinical Epidemiology, Department of Clinical Research, University of Southern Denmark, Odense C, Denmark
| | - Jan Nielsen
- Center for Clinical Epidemiology, Odense University Hospital, Odense C, Denmark
- Research Unit of Clinical Epidemiology, Department of Clinical Research, University of Southern Denmark, Odense C, Denmark
| | - Ken Lund
- Center for Clinical Epidemiology, Odense University Hospital, Odense C, Denmark
- Research Unit of Clinical Epidemiology, Department of Clinical Research, University of Southern Denmark, Odense C, Denmark
| | - Torben Knudsen
- Department of Medical Gastroenterology, Hospital of Southwest Jutland, Esbjerg, Denmark
- Department of Regional Health Science, University of Southern Denmark, Esbjerg, Denmark
| | - Jens Kjeldsen
- Department of Medical Gastroenterology S, Odense University Hospital, Odense C, Denmark
- Research Unit of Medical Gastroenterology, Department of Clinical Research, University of Southern Denmark, Odense C, Denmark
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Lee KE, Sizemore JA, Kim G, Shen B, Sands BE. Impact of Biologics and Small-Molecule Agents on Postoperative Complications in IBD: A Systematic Review. Dis Colon Rectum 2024; 67:S11-S25. [PMID: 38294838 DOI: 10.1097/dcr.0000000000003222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2024]
Abstract
BACKGROUND Patients with IBD may require colectomy for severe disease unresponsive or refractory to pharmacological therapy. The question of the impact of biologic use on postoperative complications is a topic of active investigation. OBJECTIVE A systematic literature review was performed to describe the current state of knowledge of the impact of perioperative biologic and tofacitinib use on postoperative complications in patients with IBD. DATA SOURCES PubMed and Cochrane databases were searched. STUDY SELECTION Studies between January 2000 and January 2023, in any language, were searched, followed by a snowball search identifying further studies in accordance with Preferred Reporting Items for Systematic reviews and Meta-Analyses guidelines. Articles regarding pediatric or endoscopic management were excluded. INTERVENTIONS Preoperative or perioperative exposure to biologics in IBD was included. MAIN OUTCOME MEASURES Infectious and noninfectious complications, including anastomotic leaks, surgical site infections, urinary tract infections, pneumonia, sepsis, septic shock, postoperative length of stay, readmission, and reoperation, were the main outcomes measured. RESULTS A total of 28 studies were included for analysis in this review, including 7 meta-analyses or systematic reviews and 5 randomized studies. Snowball search identified 11 additional studies providing topical information. Overall, tumor necrosis factor inhibitors likely do not increase the risk of postoperative adverse outcomes, while data on other biologics and small-molecule agents are emerging. LIMITATIONS This is a qualitative review including all study types. The varied nature of study types precludes quantitative comparison. CONCLUSIONS Although steroids increase postoperative infectious and noninfectious complications, tumor necrosis factor inhibitors do not appear to increase postoperative infectious and noninfectious complications. There is a need for further perioperative data for other agents. See video from symposium .
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Affiliation(s)
- Kate E Lee
- Department of Medicine, Duke University Medical Center, Durham, North Carolina
| | | | - Grace Kim
- Duke University School of Medicine, Durham, North Carolina
| | - Bo Shen
- Center for Inflammatory Bowel Diseases, Division of Digestive and Liver Diseases, NewYork-Presbyterian Hospital/Columbia University Irving Medical Center, New York, New York
| | - Bruce E Sands
- Dr. Henry D. Janowitz Division of Gastroenterology, Icahn School of Medicine at Mount Sinai, New York, New York
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3
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Syed H, Nadeem A, Gardinier D, Weekley K, Ribakow D, Lupe S, Bhat S, Holubar S, Cohen BL. Peri-Operative Optimization of Patients with Crohn's Disease. Curr Gastroenterol Rep 2024; 26:125-136. [PMID: 38421577 PMCID: PMC11081987 DOI: 10.1007/s11894-024-00925-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/15/2024] [Indexed: 03/02/2024]
Abstract
PURPOSE OF REVIEW The management of patients with Crohn's disease (CD) undergoing surgery is complex and optimization of modifiable factors perioperatively can improve outcomes. This review focuses on the perioperative management of CD patients undergoing surgery, emphasizing the need for a multi-disciplinary approach. RECENT FINDINGS Research highlights the benefits of a comprehensive strategy, involving nutritional optimization, psychological assessment, and addressing septic complications before surgery. Despite many CD patients being on immune-suppressing medications, studies indicate that most of these medications are safe to use and should not delay surgery. However, a personalized approach for each case is needed. This review underscores the importance of multi-disciplinary team led peri-operative management of CD patients. We suggest that this can be done at a dedicated perioperative clinic for prehabilitation, with the potential to enhance outcomes for CD patients undergoing surgery.
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Affiliation(s)
- Hareem Syed
- Department of Internal Medicine, Cleveland Clinic Foundation, 9500 Euclid Avenue, Cleveland, OH, 44195, USA
| | - Ahmed Nadeem
- Department of Internal Medicine, Cleveland Clinic Foundation, 9500 Euclid Avenue, Cleveland, OH, 44195, USA
| | - David Gardinier
- Digestive Disease and Surgery Institute, Cleveland Clinic Foundation, 9500 Euclid Avenue, Cleveland, OH, 44195, USA
| | - Kendra Weekley
- Digestive Disease and Surgery Institute, Cleveland Clinic Foundation, 9500 Euclid Avenue, Cleveland, OH, 44195, USA
| | - Dovid Ribakow
- Digestive Disease and Surgery Institute, Cleveland Clinic Foundation, 9500 Euclid Avenue, Cleveland, OH, 44195, USA
| | - Stephen Lupe
- Digestive Disease and Surgery Institute, Cleveland Clinic Foundation, 9500 Euclid Avenue, Cleveland, OH, 44195, USA
| | - Shubha Bhat
- Digestive Disease and Surgery Institute, Cleveland Clinic Foundation, 9500 Euclid Avenue, Cleveland, OH, 44195, USA
| | - Stefan Holubar
- Digestive Disease and Surgery Institute, Cleveland Clinic Foundation, 9500 Euclid Avenue, Cleveland, OH, 44195, USA
| | - Benjamin L Cohen
- Digestive Disease and Surgery Institute, Cleveland Clinic Foundation, 9500 Euclid Avenue, Cleveland, OH, 44195, USA.
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Lens C, Berne JV, Politis C. The impact of gastrointestinal diseases on oral and maxillofacial surgery outcomes. Oral Surg Oral Med Oral Pathol Oral Radiol 2023; 136:577-583. [PMID: 37658034 DOI: 10.1016/j.oooo.2023.05.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Revised: 03/19/2023] [Accepted: 05/10/2023] [Indexed: 09/03/2023]
Abstract
OBJECTIVE We analyzed the complication rates and outcomes in patients with gastrointestinal disorders who had undergone maxillofacial surgery. STUDY DESIGN We retrospectively analyzed 289 patients with inflammatory bowel disease (IBD), 142 with gastroesophageal reflux disease (GERD), and 42 with celiac disease (452 total) who had undergone oral and/or maxillofacial surgery. We examined their characteristics, medications they had taken, surgeries they had undergone, and complications they had experienced. Based on the results of univariate analysis, we selected variables for multivariable logistic regression to identify independent predictors of postoperative complications. RESULTS We found a complication rate of 10% in patients with IBD, 6.9% in patients with GERD, and 9.5% in patients with celiac disease. Dentoalveolar treatment was significantly associated with an increased risk of postoperative complications in patients with IBD and GERD. CONCLUSIONS Oral and/or maxillofacial surgery is safe in most patients with IBD, GERD, and celiac disease. Preventive measures for postoperative complications should be considered in patients with IBD and GERD undergoing dentoalveolar treatment.
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Affiliation(s)
- Charlotte Lens
- Oral and Maxillo-facial Surgery-Imaging and Pathology Research Group, Department of Imaging and Pathology, Group Biomedical Sciences, Catholic University Leuven, Leuven, Belgium; Department of Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium.
| | - Jonas Ver Berne
- Oral and Maxillo-facial Surgery-Imaging and Pathology Research Group, Department of Imaging and Pathology, Group Biomedical Sciences, Catholic University Leuven, Leuven, Belgium; Department of Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium
| | - Constantinus Politis
- Oral and Maxillo-facial Surgery-Imaging and Pathology Research Group, Department of Imaging and Pathology, Group Biomedical Sciences, Catholic University Leuven, Leuven, Belgium; Department of Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium
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Mark-Christensen A, Troelsen FS, Tøttrup A, Nagy D, Laurberg S, Erichsen R. Short-term outcomes following total colectomy for inflammatory bowel disease in Denmark after implementation of laparoscopy: a nationwide population-based study. Colorectal Dis 2023; 25:1802-1811. [PMID: 37537857 DOI: 10.1111/codi.16691] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/12/2022] [Revised: 05/27/2023] [Accepted: 06/19/2023] [Indexed: 08/05/2023]
Abstract
AIM A laparoscopic approach to total colectomy (TC) for inflammatory bowel disease (IBD) is being increasingly used, but data on its comparative benefits over open TC are conflicting. The aim of this study was to examine 90-day outcomes following laparoscopic and open TC for IBD in a nationwide cohort after the introduction of laparoscopy. METHOD IBD patients undergoing TC in Denmark from 2005 to 2017 were identified from the Danish National Patient Registry. We used Kaplan-Meier methodology to estimate mortality and Cox regression analysis to estimate adjusted mortality rate ratios (aMRRs) and adjusted hazard ratios (aHRs) of reoperation, readmission and intensive care unit (ICU) transfer, comparing patients undergoing laparoscopic versus open TC. RESULTS We identified 1095 patients undergoing laparoscopic TC and 1523 patients undergoing open TC. Following emergency TC, 90-day mortality was 2.8% (1.6%-4.9%) after laparoscopic TC and 9.1% (7.0%-11.8%) after open TC. Ninety-day mortality was 0.9% (0.3%-2.5%) after laparoscopic TC and 2.6% (1.5%-4.3%) after open elective TC. The aMRRs associated with laparoscopic TC were 0.45 (95% CI 0.25-0.80) in emergency cases and 0.29 (95% CI 0.10-0.86) in elective cases. Risks of readmission were comparable following laparoscopic versus open TC, both in emergency [aHR = 0.93 (95% CI 0.76-1.15)] and elective [aHR = 0.83 (95% CI 0.68-1.02)] cases, while risks of ICU transfer and reoperation were lower following laparoscopic TC, both in emergency cases [aHR = 0.53 (95% CI 0.35-0.82) and aHR = 0.26 (95% CI 0.15-0.47)] and elective [aHR = 0.58 (95% CI 0.35-0.95) and aHR = 0.37 (95% CI 0.21-0.66)] cases. CONCLUSION The introduction of laparoscopic TC for IBD in Denmark was not associated with increased mortality or morbidity. In fact, laparoscopic TC for IBD may be associated with lower short-term mortality and morbidity compared with open TC.
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Affiliation(s)
- Anders Mark-Christensen
- Department of Clinical Epidemiology, Aarhus University Hospital, Aarhus N, Denmark
- Section of Coloproctology, Department of Surgery, Aarhus University Hospital, Aarhus N, Denmark
| | | | - Anders Tøttrup
- Section of Coloproctology, Department of Surgery, Aarhus University Hospital, Aarhus N, Denmark
| | - Dávid Nagy
- Department of Clinical Epidemiology, Aarhus University Hospital, Aarhus N, Denmark
- Department of Clinical Medicine, Aarhus University, Aarhus N, Denmark
| | - Søren Laurberg
- Section of Coloproctology, Department of Surgery, Aarhus University Hospital, Aarhus N, Denmark
| | - Rune Erichsen
- Department of Clinical Epidemiology, Aarhus University Hospital, Aarhus N, Denmark
- Department of Surgery, Randers Regional Hospital, Randers, Denmark
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Cira K, Weber MC, Wilhelm D, Friess H, Reischl S, Neumann PA. The Effect of Anti-Tumor Necrosis Factor-Alpha Therapy within 12 Weeks Prior to Surgery on Postoperative Complications in Inflammatory Bowel Disease: A Systematic Review and Meta-Analysis. J Clin Med 2022; 11:6884. [PMID: 36498459 PMCID: PMC9738467 DOI: 10.3390/jcm11236884] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2022] [Revised: 11/07/2022] [Accepted: 11/12/2022] [Indexed: 11/24/2022] Open
Abstract
The rate of abdominal surgical interventions and associated postoperative complications in inflammatory bowel disease (IBD) patients is still substantially high. There is an ongoing debate as to whether or not patients who undergo treatment with anti-tumor necrosis factor-alpha (TNF-α) agents may have an increased risk for general and surgical postoperative complications. Therefore, a systematic review and meta-analysis was conducted in order to assess the effect of anti-TNF-α treatment within 12 weeks (washout period) prior to abdominal surgery on 30-day postoperative complications in patients with IBD. The results of previously published meta-analyses examining the effect of preoperative anti-TNF-α treatment on postoperative complications reported conflicting findings which is why we specifically focus on the effect of anti-TNF-α treatment within 12 weeks prior to surgery. PubMed, Cochrane, Scopus, Web of Science, World Health Organization Trial Registry, ClinicalTrials.gov and reference lists were searched (June 1995−February 2022) to identify studies, investigating effects of anti-TNF-α treatment prior to abdominal surgery on postoperative complications in IBD patients. Pooled odds ratios (OR) with 95% confidence intervals (CI) were calculated and subgroup analyses were performed. In this case, 55 cohort studies (22,714 patients) were included. Overall, postoperative complications (OR, 1.23; 95% CI, 1.04−1.45; p = 0.02), readmission (OR, 1.39; 95% CI, 1.11−1.73; p = 0.004), and intra-abdominal septic complications (OR, 1.89; 95% CI, 1.44−2.49; p < 0.00001) were significantly higher for anti-TNF-α-treated patients. Significantly higher intra-abdominal abscesses and readmission were found for anti-TNF-α-treated CD patients (p = 0.05; p = 0.002). Concomitant treatment with immunosuppressives in <50% of anti-TNF-α-treated patients was associated with significantly lower mortality rates (OR, 0.32; 95% CI, 0.12−0.83; p = 0.02). Anti-TNF-α treatment within 12 weeks prior to surgery is associated with higher short-term postoperative complication rates (general and surgical) for patients with IBD, especially CD.
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Affiliation(s)
- Kamacay Cira
- Department of Surgery, School of Medicine, Klinikum Rechts der Isar, Technical University of Munich, 81675 Munich, Germany
| | - Marie-Christin Weber
- Department of Surgery, School of Medicine, Klinikum Rechts der Isar, Technical University of Munich, 81675 Munich, Germany
| | - Dirk Wilhelm
- Department of Surgery, School of Medicine, Klinikum Rechts der Isar, Technical University of Munich, 81675 Munich, Germany
| | - Helmut Friess
- Department of Surgery, School of Medicine, Klinikum Rechts der Isar, Technical University of Munich, 81675 Munich, Germany
| | - Stefan Reischl
- Institute of Diagnostic and Interventional Radiology, School of Medicine, Klinikum Rechts der Isar, Technical University of Munich, 81675 Munich, Germany
| | - Philipp-Alexander Neumann
- Department of Surgery, School of Medicine, Klinikum Rechts der Isar, Technical University of Munich, 81675 Munich, Germany
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Myrelid P, Soop M, George BD. Surgical Planning in Penetrating Abdominal Crohn's Disease. Front Surg 2022; 9:867830. [PMID: 35592128 PMCID: PMC9110798 DOI: 10.3389/fsurg.2022.867830] [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: 02/01/2022] [Accepted: 03/29/2022] [Indexed: 11/13/2022] Open
Abstract
Crohn's disease (CD) is increasing globally, and the disease location and behavior are changing toward more colonic as well as inflammatory behavior. Surgery was previously mainly performed due to ileal/ileocaecal location and stricturing behavior, why many anticipate the surgical load to decrease. There are, however, the same time data showing an increasing complexity among patients at the time of surgery with an increasing number of patients with the abdominal perforating disease, induced by the disease itself, at the time of surgery and thus a more complex surgery as well as the post-operative outcome. The other major cause of abdominal penetrating CD is secondary to surgical complications, e.g., anastomotic dehiscence or inadvertent enterotomies. To improve the care for patients with penetrating abdominal CD in general, and in the peri-operative phase in particular, the use of multidisciplinary team discussions is essential. In this study, we will try to give an overview of penetrating abdominal CD today and how this situation may be handled. Proper surgical planning will decrease the risk of surgically induced penetrating disease and improve the outcome when penetrating disease is already established. It is important to evaluate patients prior to surgery and optimize them with enteral nutrition (or parenteral if enteral nutrition is ineffective) and treat abdominal sepsis with drainage and antibiotics.
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Affiliation(s)
- Pär Myrelid
- Department of Surgery, Linköping University Hospital and Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden
| | - Mattias Soop
- Department of Surgery, Ersta Hospital, Karolinska Institutet at Danderyd Hospital, Stockholm, Sweden
| | - Bruce D. George
- Department of Colorectal Surgery, Oxford University Hospitals NHS Foundation Trust, Oxford, United Kingdom
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Hanzel J, Almradi A, Istl AC, Yang ML, Fleshner KA, Parker CE, Guizzetti L, Ma C, Singh S, Jairath V. Increased Risk of Infections with Anti-TNF Agents in Patients with Crohn's Disease After Elective Surgery: Meta-Analysis. Dig Dis Sci 2022; 67:646-660. [PMID: 33634430 DOI: 10.1007/s10620-021-06895-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Accepted: 02/03/2021] [Indexed: 12/12/2022]
Abstract
BACKGROUND Postoperative complication rates in patients with inflammatory bowel disease (IBD) receiving preoperative biologics have been analyzed without considering the surgical context. Emergency surgery may be associated with an increased risk of infectious complications, compared to elective operations. AIMS To conduct a systematic review and meta-analysis investigating the relationship between preoperative biologic therapy and postoperative outcomes in Crohn's disease (CD) and ulcerative colitis (UC), focusing on elective surgery. METHODS Electronic databases were searched up to February 12, 2020, for studies of patients with IBD undergoing elective abdominal surgery receiving biologic therapy within 3 months before surgery compared to no therapy, or another biologic therapy. Certainty of evidence was evaluated using GRADE. The primary outcomes were the rate of infections and total complications within 30 days. Pooled odds ratios (ORs) and 95% confidence intervals (CIs) were calculated. RESULTS Thirty-three studies were included. Preoperative treatment with anti-tumor necrosis factor (TNF) therapy in patients with CD undergoing elective surgery was associated with increased odds of infection (OR 2.05; 95% CI 1.40-3.01), but not total complications (OR 1.03; 95% CI 0.71-1.51). In elective surgery for UC, preoperative anti-TNF therapy was not associated with infectious (OR 1.03; 95% CI 0.34-3.07) or total complications (OR 0.67; 95% CI 0.29-1.58). Limited data indicate that emergency surgery did not significantly affect the rate of complications. CONCLUSIONS Anti-TNF therapy prior to elective surgery may increase the odds of postoperative infection in CD, although the certainty of evidence is very low. More evidence is needed, particularly for newer biologics.
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Affiliation(s)
- Jurij Hanzel
- Department of Gastroenterology, UMC Ljubljana, University of Ljubljana, Japljeva ulica 2, 1000, Ljubljana, Slovenia.,Alimentiv Inc. (Formerly Robarts Clinical Trials Inc.), 100 Dundas Street, Suite 200, London, ON, 27N6A 5B6, Canada
| | - Ahmed Almradi
- Alimentiv Inc. (Formerly Robarts Clinical Trials Inc.), 100 Dundas Street, Suite 200, London, ON, 27N6A 5B6, Canada.,Department of Medicine, Division of Gastroenterology, Western University, 1151 Richmond St, London, ON, N6A 3K7, Canada
| | - Alexandra C Istl
- Division of General Surgery, Western University, 1151 Richmond St, London, ON, N6A 3K7, Canada
| | - Mei Lucy Yang
- Division of General Surgery, Western University, 1151 Richmond St, London, ON, N6A 3K7, Canada
| | - Katherine A Fleshner
- Schulich School of Medicine and Dentistry, Western University, 1151 Richmond St, London, ON, N6A 3K7, Canada
| | - Claire E Parker
- Alimentiv Inc. (Formerly Robarts Clinical Trials Inc.), 100 Dundas Street, Suite 200, London, ON, 27N6A 5B6, Canada
| | - Leonardo Guizzetti
- Alimentiv Inc. (Formerly Robarts Clinical Trials Inc.), 100 Dundas Street, Suite 200, London, ON, 27N6A 5B6, Canada
| | - Christopher Ma
- Alimentiv Inc. (Formerly Robarts Clinical Trials Inc.), 100 Dundas Street, Suite 200, London, ON, 27N6A 5B6, Canada.,Division of Gastroenterology and Hepatology, Departments of Medicine and Community Health Sciences, University of Calgary, 2500 University Dr NW, Calgary, AB, T2N 1N4, Canada
| | - Siddharth Singh
- Division of Gastroenterology and Hepatology, Department of Medicine, University of California, San Diego, 9500 Gilman Dr, La Jolla, CA, 92093, USA
| | - Vipul Jairath
- Alimentiv Inc. (Formerly Robarts Clinical Trials Inc.), 100 Dundas Street, Suite 200, London, ON, 27N6A 5B6, Canada. .,Department of Medicine, Division of Gastroenterology, Western University, 1151 Richmond St, London, ON, N6A 3K7, Canada. .,Department of Epidemiology and Biostatistics, Western University, London, ON, Canada.
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