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Regueiro M, Greer JB, Szigethy E. Etiology and Treatment of Pain and Psychosocial Issues in Patients With Inflammatory Bowel Diseases. Gastroenterology 2017; 152:430-439.e4. [PMID: 27816599 DOI: 10.1053/j.gastro.2016.10.036] [Citation(s) in RCA: 78] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/07/2016] [Revised: 10/07/2016] [Accepted: 10/27/2016] [Indexed: 12/15/2022]
Abstract
There is increasing evidence that brain-gut interactions are altered during development of inflammatory bowel diseases (IBDs). Understanding the relationship between the neurobiology, psychological symptoms, and social ramifications of IBD can guide comprehensive care for the whole patient. The most common psychological conditions in patients with IBD are chronic abdominal pain, anxiety, and depression. We review the evidence-based data and rates of these conditions and their respective relationship to IBD and the diagnostic approaches to identify patients with these conditions. Different treatment options for pain and psychosocial conditions are discussed, and new models of team-based IBD care are introduced. Providing the health care provider with tools to diagnose and manage psychological conditions in patients with Crohn's disease or ulcerative colitis is necessary for their total care and should be part of quality-improvement initiatives.
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Affiliation(s)
- Miguel Regueiro
- Division of Gastroenterology, Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Julia B Greer
- Division of Gastroenterology, Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Eva Szigethy
- Division of Gastroenterology, Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania; Department of Psychiatry, University of Pittsburgh, Pittsburgh, Pennsylvania.
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Differences in regional homogeneity between patients with Crohn's disease with and without abdominal pain revealed by resting-state functional magnetic resonance imaging. Pain 2017; 157:1037-1044. [PMID: 26761381 DOI: 10.1097/j.pain.0000000000000479] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Abnormal pain processing in the central nervous system may be related to abdominal pain in patients with Crohn's disease (CD). The purpose of this study was to investigate changes in resting-state brain activity in patients with CD in remission and its relationship with the presence of abdominal pain. Twenty-five patients with CD and with abdominal pain, 25 patients with CD and without abdominal pain, and 32 healthy subjects were scanned using a 3.0-T functional magnetic resonance imaging scanner. Regional homogeneity (ReHo) was used to assess resting-state brain activity. Daily pain scores were collected 1 week before functional magnetic resonance imaging. We found that patients with abdominal pain exhibited lower ReHo values in the insula, middle cingulate cortex (MCC), and supplementary motor area and higher ReHo values in the temporal pole. In contrast, patients without abdominal pain exhibited lower ReHo values in the hippocampal/parahippocampal cortex and higher ReHo values in the dorsomedial prefrontal cortex (all P < 0.05, corrected). The ReHo values of the insula and MCC were significantly negatively correlated with daily pain scores for patients with abdominal pain (r = -0.53, P = 0.008 and r = -0.61, P = 0.002, respectively). These findings suggest that resting-state brain activities are different between remissive patients with CD with and without abdominal pain and that abnormal activities in insula and MCC are closely related to the severity of abdominal pain.
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Reduction of chronic abdominal pain in patients with inflammatory bowel disease through transcranial direct current stimulation: a randomized controlled trial. Pain 2016; 157:429-437. [PMID: 26469395 DOI: 10.1097/j.pain.0000000000000386] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Inflammatory bowel disease (IBD) is frequently associated with chronic abdominal pain (CAP). Transcranial direct current stimulation (tDCS) has been proven to reduce chronic pain. This study aimed to investigate the effects of tDCS in patients with CAP due to IBD. This randomized, sham-controlled, double blind, parallel-designed study included 20 patients with either Crohn disease or ulcerative colitis with CAP (≥3/10 on the visual analog scale (VAS) in 3/6 months). Anodal or sham tDCS was applied over the primary motor cortex for 5 consecutive days (2 mA, 20 minutes). Assessments included VAS, pressure pain threshold, inflammatory markers, and questionnaires on quality of life, functional and disease specific symptoms (Irritable Bowel Syndrome-Severity Scoring System [IBS-SSS]), disease activity, and pain catastrophizing. Follow-up data were collected 1 week after the end of the stimulation. Statistical analyses were performed using analysis of variance and t tests. There was a significant reduction of abdominal pain in the anodal tDCS group compared with sham tDCS. This effect was evident in changes in VAS and pressure pain threshold on the left and right sides of the abdomen. In addition, 1 week after stimulation, pain reduction remained significantly decreased in the right side of the abdomen. There was also a significant reduction in scores on pain catastrophizing and on IBS-SSS when comparing both groups. Inflammatory markers and disease activity did not differ significantly between groups throughout the experiment. Transcranial direct current stimulation proved to be an effective and clinically relevant therapeutic strategy for CAP in IBD. The analgesic effects observed are unrelated to inflammation and disease activity, which emphasizes central pain mechanisms in CAP.
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Jelsness-Jørgensen LP, Frigstad SO, Moum B, Grimstad T, Opheim R, Jahnsen J, Bernklev T. Pain may be an important factor to consider in inflammatory bowel disease patients troubled by fatigue. United European Gastroenterol J 2016; 5:687-693. [PMID: 28815032 DOI: 10.1177/2050640616674654] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/09/2016] [Accepted: 09/20/2016] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Pain has been associated with fatigue in many chronic diseases, but data are not available for inflammatory bowel disease (IBD). The aim of this study was to investigate whether fatigue is associated with pain in IBD after adjusting for the relevant covariates. METHODS Participants were recruited from nine hospitals in the south-eastern and western part of Norway. Socio-demographic variables were self-reported by patients. Disease activity was assessed by disease activity indices and faecal calprotectin. Patient-reported outcomes (PROs) were collected using the Fatigue Questionnaire (FQ), Brief Pain Inventory (BPI), Hospital Anxiety and Depression Scale (HADS) and Basic Nordic Sleep Questionnaire. RESULTS From a total of 452 invited patients, 414 (91.6%) provided written informed consent. After excluding any missing data, 408 total patients were included in the analyses (ulcerative colitis = 180 and Crohn's disease = 228). In the crude analysis, substantial and chronic fatigue were associated with increased pain intensity regardless of the diagnosis. However, when controlling for relevant covariates in the ANCOVA, the differences in pain intensity among patients with and without substantial or chronic fatigue were insignificant. The Cohen's d effect size was small to moderate (>0.20) in patients with chronic fatigue. CONCLUSIONS Despite a tendency of elevated pain intensity scores among patients with fatigue, these differences were insignificant after controlling for the relevant covariates. However, based on Cohen's effect size, these differences may be of clinical importance in a subset of patients.
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Affiliation(s)
- Lars-Petter Jelsness-Jørgensen
- Østfold University College, Department of Health Sciences/Østfold Hospital Trust, Department of Gastroenterology, Fredrikstad, Norway
| | - Svein-Oskar Frigstad
- Vestre Viken Hospital Trust, Department of Gastroenterology/Østfold Hospital Trust, Department of Internal Medicine, Norway
| | - Bjørn Moum
- Oslo University Hospital, Department of Gastroenterology/University of Oslo, Oslo, Norway
| | - Tore Grimstad
- Stavanger University Hospital, Department of Gastroenterology, Stavanger, Norway
| | - Randi Opheim
- Oslo University Hospital, Department of Gastroenterology/University of Oslo, Oslo, Norway
| | - Jørgen Jahnsen
- Akershus University Hospital, Department of Gastroenterology, Lørenskog, Norway; University of Oslo, Institute of Clinical Medicine, Oslo, Norway
| | - Tomm Bernklev
- Telemark Hospital Trust, Department of Research/University of Oslo, Skien, Norway
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Pain in IBD Patients: Very Frequent and Frequently Insufficiently Taken into Account. PLoS One 2016; 11:e0156666. [PMID: 27332879 PMCID: PMC4917102 DOI: 10.1371/journal.pone.0156666] [Citation(s) in RCA: 99] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2016] [Accepted: 05/17/2016] [Indexed: 02/06/2023] Open
Abstract
Background Pain is a common symptom related to inflammatory bowel disease (IBD). In addition to abdominal pain, pain can also be an extraintestinal manifestation of IBD. Pain treatment is challenging and a substantial part of IBD patients are treated with opioids. Therefore, a better knowledge on pain symptoms is crucial for a better therapeutic approach to this clinical problem. Methods Patients of the Swiss IBD Cohort Study (SIBDCS) (n = 2152) received a questionnaire regarding pain intensity, pain localization and impact of pain on daily life and social activities. Furthermore, the questionnaire investigated the use of pain-specific medication. Results A vast majority of patients (71%) experienced pain during the disease course. For a substantial part of patients (49% in UC and 55% in CD) pain is a longstanding problem (>5 years). Pain in UC was of shorter duration compared to CD (p < 0.01). Abdominal pain (59.5%) and back pain (38.3%) were the main pain localizations. 67% of patients took pain medication; 24% received no pain treatment. The general quality of life was significantly lower in patients suffering of pain compared to those without pain (38 vs. 77; (-100 very bad; 100 very good) p<0.0001). Conclusions Prevalence of pain is high in patients of the SIBDCS. It is a longstanding problem for the majority of the patients affected. Pain was found to be undertreated in the SIBDCS and was significantly associated with health-related quality of life. Thus, an increased awareness is mandatory to address this frequent complication in the course of IBD.
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Jelsness-Jørgensen LP, Moum B, Grimstad T, Jahnsen J, Opheim R, Prytz Berset I, Hovde Ø, Torp R, Frigstad SO, Huppertz-Hauss G, Bernklev T. Validity, Reliability, and Responsiveness of the Brief Pain Inventory in Inflammatory Bowel Disease. Can J Gastroenterol Hepatol 2016; 2016:5624261. [PMID: 27446848 PMCID: PMC4930809 DOI: 10.1155/2016/5624261] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/07/2016] [Revised: 04/24/2016] [Accepted: 05/29/2016] [Indexed: 01/24/2023] Open
Abstract
Background and Aims. No patient-reported outcome measures targeting pain have yet been validated for use in IBD patients. Consequently, the aim of this study was to test the psychometrical properties of the brief pain inventory (BPI) in an outpatient population with IBD. Methods. Participants were recruited from nine hospitals in the southeastern and western parts of Norway. Clinical and sociodemographic data were collected, and participants completed the BPI, as well as the Short-Form 36 (SF-36). Results. In total, 410 patients were included. The BPI displayed high correlations with the bodily pain dimension of the SF-36, as well as moderate correlations with disease activity indices. The BPI also displayed excellent internal consistency (Cronbach's alpha value of 0.91, regardless of diagnosis) and good to excellent test-retest values (intraclass correlation coefficient (ICC) 0.84-0.90 and Kappa values > .70). In UC, calculation of responsiveness revealed that only BPI interference in patients reporting improvement reached the threshold of 0.2. In CD, Cohen's d ranged from 0.26 to 0.68. Conclusions. The BPI may serve as an important supplement in patient-reported outcome measurement in IBD. There is need to confirm responsiveness in future studies. Moreover, responsiveness should ideally be investigated using changes in objective markers of inflammation.
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Affiliation(s)
- Lars-Petter Jelsness-Jørgensen
- Health Science, Østfold University College, Postboks 700, 1757 Halden, Norway
- Department of Gastroenterology, Østfold Hospital Trust, Fredrikstad, Norway
| | - Bjørn Moum
- Department of Gastroenterology, Oslo University Hospital, Postboks 4959 Nydalen, 0424 Oslo, Norway
- Institute of Clinical Medicine, University of Oslo, Postboks 1072 Blindern, 0316 Oslo, Norway
| | - Tore Grimstad
- Department of Gastroenterology, Stavanger University Hospital, Armauer Hansensvei 20, 4011 Stavanger, Norway
| | - Jørgen Jahnsen
- Institute of Clinical Medicine, University of Oslo, Postboks 1072 Blindern, 0316 Oslo, Norway
- Department of Gastroenterology, Akershus University Hospital, Postboks 1000, 1478 Lørenskog, Norway
| | - Randi Opheim
- Department of Gastroenterology, Oslo University Hospital, Postboks 4959 Nydalen, 0424 Oslo, Norway
- Institute of Health and Society, University of Oslo, Postboks 1072 Blindern, 0316 Oslo, Norway
| | - Ingrid Prytz Berset
- Department of Gastroenterology, Møre and Romsdal Hospital Trust, 6026 Ålesund, Norway
| | - Øistein Hovde
- Institute of Clinical Medicine, University of Oslo, Postboks 1072 Blindern, 0316 Oslo, Norway
- Department of Gastroenterology, Innlandet Hospital Trust, Kyrre Grepps Gate 11, 2819 Gjøvik, Norway
| | - Roald Torp
- Department of Gastroenterology, Innlandet Hospital Trust, Postboks 104, 2381 Brumunddal, Norway
| | - Svein Oskar Frigstad
- Department of Gastroenterology, Vestre Viken Hospital Trust, Postboks 800, 3004 Drammen, Norway
- Department of Internal Medicine, Østfold Hospital Trust, Postboks 300, 1714 Grålum, Norway
| | | | - Tomm Bernklev
- Institute of Clinical Medicine, University of Oslo, Postboks 1072 Blindern, 0316 Oslo, Norway
- O&U, Telemark Hospital Trust, 3710 Skien, Norway
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59
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Olesen AE, Farmer AD, Olesen SS, Aziz Q, Drewes AM. Management of chronic visceral pain. Pain Manag 2016; 6:469-86. [PMID: 27256577 DOI: 10.2217/pmt-2015-0011] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Despite marked differences in underlying pathophysiology, the current management of visceral pain largely follows the guidelines derived from the somatic pain literature. The effective management of patients with chronic visceral pain should be multifaceted, including both pharmacological and psychological interventions, thereby providing a mechanism-orientated approach to treatment. Patients can frequently become disenfranchised, and subsequently disengaged, with healthcare providers leading to repeated consultations. Thus, a key aspect of management is to break this cycle by validating patients' symptoms, adopting an empathic approach and taking time to educate patients. To optimize treatment and outcomes in chronic visceral pain we need to move away from approaches exclusively based on dealing with peripheral nociceptive input toward more holistic strategies, taking into account alterations in central pain processing.
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Affiliation(s)
- Anne E Olesen
- Mech-Sense, Department of Gastroenterology & Hepatology, Aalborg University Hospital, Aalborg, Denmark.,Department of Drug Design & Pharmacology, Faculty of Health & Medical Sciences, University of Copenhagen, Copenhagen, Denmark.,Department of Clinical Medicine, Aalborg University, Aalborg, Denmark
| | - Adam D Farmer
- Mech-Sense, Department of Gastroenterology & Hepatology, Aalborg University Hospital, Aalborg, Denmark.,University Hospitals of North Midlands, Stoke on Trent, UK
| | - Søren S Olesen
- Mech-Sense, Department of Gastroenterology & Hepatology, Aalborg University Hospital, Aalborg, Denmark.,Department of Clinical Medicine, Aalborg University, Aalborg, Denmark
| | - Qasim Aziz
- University Hospitals of North Midlands, Stoke on Trent, UK
| | - Asbjørn M Drewes
- Mech-Sense, Department of Gastroenterology & Hepatology, Aalborg University Hospital, Aalborg, Denmark.,Department of Clinical Medicine, Aalborg University, Aalborg, Denmark
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60
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Abstract
Analgesic drugs, as well as providing pain relief, can cause a range of other symptoms and side effects, most notably on the gastrointestinal system. Conversely, gastrointestinal disease will often require analgesia, and this can be complicated by the fact that the gut is the site of absorption of oral drugs. This paper discusses some of the effects of common oral analgesic drugs on the gastrointestinal tract and their role in managing some of the most common, nonmalignant, chronic gastrointestinal disorders in adults.
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Affiliation(s)
- R Lawrence
- R Lawrence, Royal Edinburgh Hospital, Morningside Terrace, Edinburgh EH10 5HF, UK. Email
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Åkerman A, Månsson S, Fork FT, Leander P, Ekberg O, Taylor S, Menys A, Ohlsson B. Computational postprocessing quantification of small bowel motility using magnetic resonance images in clinical practice: An initial experience. J Magn Reson Imaging 2016; 44:277-87. [PMID: 26801196 DOI: 10.1002/jmri.25166] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2015] [Accepted: 01/10/2016] [Indexed: 02/06/2023] Open
Abstract
PURPOSE To study the feasibility and to gauge the potential clinical impact of quantifying small bowel motility using magnetic resonance imaging (MRI) in a larger population with a spectra of gastrointestinal conditions with impaired small bowel motility. MATERIALS AND METHODS Data were gathered retrospectively from a cohort of 127 patients undergoing MR enterography (1.5 Tesla) in 2011. Cine motility sequences were processed with validated motility analysis software and a parametric motility map was generated. Regions of interests were drawn in the jejunum, ileum, and terminal ileum, and Jacobian standard deviation mean motility index' score (MIS) was calculated. Patients were divided into Crohn's disease (CD), ulcerative colitis, irritable bowel syndrome, and healthy subjects. RESULTS In CD, terminal ileum motility was lower in comparison to healthy subjects (mean difference: -0.1052 arbitrary units, 95% confidence interval: -0.1981--0.0122, P = 0.018). Subgrouping of CD showed that the difference was recognized in patients with disease limited to the small bowel (mean difference: -0.1440 arbitrary units, 95% confidence interval: -0.2491--0.0389, P = 0.002). Visible dysmotility of terminal ileum on MRI reflected a reduced MIS compared with normal motility (0.22 ± 0.09 and 0.33 ± 0.15 arbitrary units, respectively, P = 0.043). Motility correlated negatively between ileum and age (P = 0.021), and between terminal ileum and C-reactive protein in ulcerative colitis (P = 0.031). CONCLUSION Motility quantitation revealed a significant difference in motility of terminal ileum in patients with small bowel CD compared with healthy subjects, concording with visible dysmotility and inflammatory changes. J. Magn. Reson. Imaging 2016;44:277-287.
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Affiliation(s)
- André Åkerman
- Department of Clinical Sciences, Division of Internal Medicine, Skåne University Hospital, Malmö, Lund University, Sweden
| | - Sven Månsson
- Medical Radiation Physics, Department of Translational Medicine, Lund University, Skåne University Hospital, Malmö, Sweden
| | - Frans-Thomas Fork
- Department of Imaging and Function, Lund University, Skåne University Hospital, Malmö, Sweden
| | - Peter Leander
- Department of Imaging and Function, Lund University, Skåne University Hospital, Malmö, Sweden
| | - Olle Ekberg
- Department of Imaging and Function, Lund University, Skåne University Hospital, Malmö, Sweden
| | - Stuart Taylor
- Centre for Medical Imaging, University College London, London, United Kingdom
| | - Alex Menys
- Centre for Medical Imaging, University College London, London, United Kingdom
| | - Bodil Ohlsson
- Department of Clinical Sciences, Division of Internal Medicine, Skåne University Hospital, Malmö, Lund University, Sweden
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Johnson AC, Greenwood-Van Meerveld B. The Pharmacology of Visceral Pain. ADVANCES IN PHARMACOLOGY 2016; 75:273-301. [PMID: 26920016 DOI: 10.1016/bs.apha.2015.11.002] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Visceral pain describes pain emanating from the internal thoracic, pelvic, or abdominal organs. Unlike somatic pain, visceral pain is generally vague, poorly localized, and characterized by hypersensitivity to a stimulus such as organ distension. While current therapeutics provides some relief from somatic pain, drugs used for treatment of chronic visceral pain are typically less efficacious and limited by multiple adverse side effects. Thus, the treatment of visceral pain represents a major unmet medical need. Further, more basic research into the physiology and pathophysiology of visceral pain is needed to provide novel targets for future drug development. In concert with chronic visceral pain, there is a high comorbidity with stress-related psychiatric disorders including anxiety and depression. The mechanisms linking visceral pain with these overlapping comorbidities remain to be elucidated. However, persistent stress facilitates pain perception and sensitizes pain pathways, leading to a feed-forward cycle promoting chronic visceral pain disorders. We will focus on stress-induced exacerbation of chronic visceral pain and provide supporting evidence that centrally acting drugs targeting the pain and stress-responsive brain regions may represent a valid target for the development of novel and effective therapeutics.
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Affiliation(s)
- Anthony C Johnson
- Oklahoma Center for Neuroscience, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - Beverley Greenwood-Van Meerveld
- Oklahoma Center for Neuroscience, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA; Veterans Affairs Medical Center, Oklahoma City, Oklahoma, USA; Department of Physiology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA.
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63
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Kreijne JE, Lie MRKL, Vogelaar L, van der Woude CJ. Practical Guideline for Fatigue Management in Inflammatory Bowel Disease. J Crohns Colitis 2016; 10:105-11. [PMID: 26392414 DOI: 10.1093/ecco-jcc/jjv168] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Accepted: 09/11/2015] [Indexed: 12/28/2022]
Abstract
During active inflammatory bowel disease (IBD) fatigue is a common symptom, which seems related to active gut inflammation. However, even in remission many patients suffer from fatigue that negatively affects quality of life and work productivity. Currently, robust knowledge on the pathogenesis and treatment of IBD-related fatigue is lacking. In order to alleviate the burden of IBD-related fatigue, a systematic approach is mandatory. We propose a fatigue attention cycle to enhance identification, evaluation and management of fatigued IBD patients. The benefits of the cycle are twofold. Firstly, it allows the systematic and uniform identification of patients with severe fatigue, in turn allowing tailored non-pharmacological and pharmacological interventions. Secondly, uniform identification of such patients creates a well-defined patient base to investigate the underlying pathogenesis of fatigue, resulting in a greater understanding of this debilitating phenomenon and possibly resulting in the discovery of predictive factors and new treatment interventions.
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Affiliation(s)
- J E Kreijne
- Department of Gastroenterology & Hepatology, Erasmus MC, Rotterdam, The Netherlands
| | - M R K L Lie
- Department of Gastroenterology & Hepatology, Erasmus MC, Rotterdam, The Netherlands
| | - L Vogelaar
- Department of Gastroenterology & Hepatology, Erasmus MC, Rotterdam, The Netherlands
| | - C J van der Woude
- Department of Gastroenterology & Hepatology, Erasmus MC, Rotterdam, The Netherlands
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