OBJECTIVE: Mixed evidence exists regarding whether irritable bowel syndrome (IBS) patients show increased somatic pain perception compared with controls. The current study used a deep, tonic somatic pain stimulus (ischemic pain) to evaluate somatic hypersensitivity in IBS patients. METHODS: A total of 27 diarrhea-predominant and 15 constipation-predominant IBS patients, and 29 controls participated in the study. The modified submaximal effort tourniquet procedure was performed to induce ischemic arm pain, and the time required to reach pain threshold and pain tolerance were recorded in seconds. All subjects completed the Functional Bowel Disease Severity Index (FBDSI) scale as well as several psychosocial instruments. Group differences for threshold and tolerance were determined using a series of one-way anova tests followed by Tukey comparisons. RESULTS: IBS patients had a shorter time to ischemic threshold (F = 34.606, P < 0.001) and tolerance (F = 38.656, P < 0.001) compared with controls; however, the groups did not differ on ratings of pain at the time of tolerance. IBS patients had a higher rating on the FBDSI scale compared with controls (P < 0.001), and ischemic pain threshold was negatively correlated with the FBDSI score. CONCLUSIONS: The results of this study suggest that a widespread alteration in central pain processing in IBS patients may be present as they display hypersensitivity to ischemic arm pain, and ischemic pain threshold was associated with clinical symptoms. These findings could reflect a dysfunction in inhibitory pain systems in IBS patients, as ischemic (deep) pain may be under tonic inhibitory control. Wiley Periodicals, Inc.
OBJECTIVE: Mixed evidence exists regarding whether irritable bowel syndrome (IBS) patients show increased somatic pain perception compared with controls. The current study used a deep, tonic somatic pain stimulus (ischemic pain) to evaluate somatic hypersensitivity inIBSpatients. METHODS: A total of 27 diarrhea-predominant and 15 constipation-predominant IBSpatients, and 29 controls participated in the study. The modified submaximal effort tourniquet procedure was performed to induce ischemic arm pain, and the time required to reach pain threshold and pain tolerance were recorded in seconds. All subjects completed the Functional Bowel Disease Severity Index (FBDSI) scale as well as several psychosocial instruments. Group differences for threshold and tolerance were determined using a series of one-way anova tests followed by Tukey comparisons. RESULTS:IBSpatients had a shorter time to ischemic threshold (F = 34.606, P < 0.001) and tolerance (F = 38.656, P < 0.001) compared with controls; however, the groups did not differ on ratings of pain at the time of tolerance. IBSpatients had a higher rating on the FBDSI scale compared with controls (P < 0.001), and ischemic pain threshold was negatively correlated with the FBDSI score. CONCLUSIONS: The results of this study suggest that a widespread alteration in central pain processing in IBSpatients may be present as they display hypersensitivity to ischemic arm pain, and ischemic pain threshold was associated with clinical symptoms. These findings could reflect a dysfunction in inhibitory pain systems in IBSpatients, as ischemic (deep) pain may be under tonic inhibitory control. Wiley Periodicals, Inc.
Authors: Anthony Rodrigues; Christopher D King; Fong Wong; Joseph L Riley; Siegfried Schmidt; Andre P Mauderli Journal: Pain Res Treat Date: 2012-02-28
Authors: Marie Weinreich Petersen; Sine Skovbjerg; Jens Søndergaard Jensen; Tina Birgitte Wisbech Carstensen; Thomas Meinertz Dantoft; Per Fink; Michael Eriksen Benros; Erik Lykke Mortensen; Torben Jørgensen; Lise Kirstine Gormsen Journal: Eur J Pain Date: 2021-08-10 Impact factor: 3.651