Exploring Biopsychosocial Mechanisms of Abdominal Pain in Inflammatory Bowel Disease and Irritable Bowel Syndrome
试验速览
- 阶段
- 不适用
- 入组人数
- 90
- 试验地点
- 3
- 主要终点
- Contribution of socio-demographic, clinical and psychosocial factors to the efficiency of inhibitory pain modulation
研究概览
简要总结
Abdominal pain is a central symptom of Inflammatory Bowel Disease (IBD) and Irritable Bowel Syndrome (IBS). IBD is an autoimmune disease characterized by inflammation of the gastrointestinal tract. IBS does not have clear biomarkers and is diagnosed based on symptom reports. The aim of this study is to explore biopsychosocial factors which may perpetuate and/or increase the severity of pain in these conditions. The main focus will be on the role of top-down brain processes in the experience of abdominal pain.
详细描述
It remains unclear why a large proportion of people with inflammatory bowel disease (IBD) report ongoing abdominal pain during remission or why people with irritable bowel syndrome (IBS) develop abdominal pain. One theory is that people with chronic pain have somehow grown more sensitive.
It is assumed that such heightened sensitivity depends both on bottom-up processing and top-down processing. Bottom-up processing refers to information that is relayed to the brain along so-called afferent fibres. Top-down processing refers to feedback provided by the brain to lower areas along efferent fibres.
The investigators will (1) measure the capacity of people to inhibit pain through top-down processing, (2) test if the human pain experience is enhanced due to sustained activation of certain afferents, and (3) assess to what extent people are impacted by psychosocial inhibition and activation factors. Results of people with IBS in remission will be compared with the results of two groups of people with IBD (those with pain and those without) and the investigators will explore if their measurements differentiate between groups.
It is hypothesized that (1) IBS patients and IBD patients with abdominal pain will be less able to inhibit their pain compared to IBD patients without abdominal pain (2) IBS patients and IBD patients with abdominal pain will score higher on psychosocial inhibition factors and lower on psychosocial activation factors when compared to IBD patients without abdominal pain. (3) In the total cohort, laboratory measures of pain inhibition will correlate with self-reported psychosocial inhibition and activation factors. (4) IBS patients and IBD patients with abdominal pain will show more temporal summation compared to IBD patients without abdominal pain.
研究设计
- 研究类型
- Observational
- 观察模型
- Case Control
- 时间视角
- Cross Sectional
入排标准
- 年龄范围
- 18 Years 至 —（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- 未提供
排除标准
- 未提供
结局指标
主要结局
Contribution of socio-demographic, clinical and psychosocial factors to the efficiency of inhibitory pain modulation
时间窗: January 31, 2020
Measured with a range of questionnaires, i.e.: Brief Pain Inventory Short Form (BPI), painDETECT questionnaire, Patient Health Questionnaire-9, Generalized Anxiety Disorder-7, Visceral Sensitivity Index, Pain Catastrophising Scale, Cognitive and Behavioural Response to Symptoms Questionnaire, Pain Self Efficacy Questionnaire, Chronic Pain Acceptance Questionnaire-8, and Mental Health Continuum Short-Form
Efficiency of inhibitory pain modulation, comparing patients with IBS or quiescent IBD
时间窗: January 31, 2020
Measured with Conditioned Pain Modulation test. Two inflatable pressure cuffs are secured around the caffs of subjects and then inflated. Pressure pain detection threshold (PDT) and pressure pain tolerance (PTT) are assessed on a subject's dominant leg. PDT is the first sensation of pain and PTT is defined as the point a subject no longer want the cuff to inflate. A VAS device allows participants to report their pain levels by moving a sliding button along a continuous line between two endpoints (0=no pain to 10=worst pain imaginable). After a second baseline measure on the non-dominant leg CPM is assessed: the cuff on the non-dominant leg is inflated to 70% of the subject's PTT, then after 15 seconds the cuff on the dominant leg is inflated. If pain modulation is achieved, the subject will show increased threshold and tolerance levels during CPM. The CPM-effect is defined as the difference between baseline and conditioning measurements of both PDT and PTT.
次要结局
- Pain facilitation, comparing patients with IBS and quiescent IBD(January 31, 2020)