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Visceral Perception Thresholds (visceral + perception_threshold)

Distribution by Scientific Domains
Medical Sciences100%

Selected Abstracts

Visceral perception thresholds after rectal thermal and pressure stimuli in irritable bowel syndrome patients

JOURNAL OF GASTROENTEROLOGY AND HEPATOLOGY, Issue 2 2004
YANQING LI
Abstract Background and Aim:, Visceral hypersensitivity has been shown to be present in irritable bowel syndrome (IBS). The current study sought to compare the characteristics of visceral perception thresholds after rectal thermal and pressure stimuli between IBS patients and healthy subjects. Methods:, A total of 46 patients with IBS were diagnosed using Rome II criteria. Thirteen healthy individuals participated in the study. Rectal visceral perception thresholds were examined in patients with IBS and in normal controls after thermal and pressure stimuli. Subjects were asked to report the sensation type, location, and spread. Results:, Compared with healthy subjects, IBS patients demonstrated significantly initially lower perception thresholds and defecation thresholds to rectal thermal and pressure stimuli, particularly in patients with diarrhea-predominant IBS. Ice stimuli on the abdominal wall had varied effects on symptoms in patients with IBS and did not affect perception thresholds. Conclusions:, Visceral perception thresholds were decreased significantly after rectal thermal and pressure stimuli in patients with IBS. Visceral hypersensitivity may be one of the important pathogenic mechanisms in IBS. [source]

Study on functional constipation and constipation-predominant irritable bowel syndrome by using the colonic transit test and anorectal manometry

JOURNAL OF DIGESTIVE DISEASES, Issue 4 2002
Li Xing ZHAN
OBJECTIVE: To investigate the visceral perception, anorectal pressure and colonic transit time (CTT) in patients with functional constipation and constipation-predominant irritable bowel syndrome (C-IBS), and to study the manometric abnormalities of these two conditions. METHODS: The CTT in patients with functional constipation and C-IBS was studied by using radiopaque markers. Rectal visceral perception thresholds, rectal compliance and anorectal pressure were examined by electric barostat. RESULTS: The CTT in both groups of constipated patients was abnormal. A lot of radiopaque markers remained in the right colon in C-IBS patients, whereas in patients with functional constipation, the radiopaque markers remained in each segment of the colon. The anorectal resting pressure, squeezing pressure and relaxation pressure were normal in both groups. Rectal compliance and defecation thresholds were much higher compared with controls, and the rectal visceral perception of functional constipation was also abnormal. CONCLUSIONS: The motility abnormalities of functional constipation and C-IBS occurred in different colonic segments. Results suggest that CTT measure­ment and anorectal manometry could be helpful in the differential diagnosis of these two conditions. [source]

Visceral perception thresholds after rectal thermal and pressure stimuli in irritable bowel syndrome patients

JOURNAL OF GASTROENTEROLOGY AND HEPATOLOGY, Issue 2 2004
YANQING LI
Abstract Background and Aim:, Visceral hypersensitivity has been shown to be present in irritable bowel syndrome (IBS). The current study sought to compare the characteristics of visceral perception thresholds after rectal thermal and pressure stimuli between IBS patients and healthy subjects. Methods:, A total of 46 patients with IBS were diagnosed using Rome II criteria. Thirteen healthy individuals participated in the study. Rectal visceral perception thresholds were examined in patients with IBS and in normal controls after thermal and pressure stimuli. Subjects were asked to report the sensation type, location, and spread. Results:, Compared with healthy subjects, IBS patients demonstrated significantly initially lower perception thresholds and defecation thresholds to rectal thermal and pressure stimuli, particularly in patients with diarrhea-predominant IBS. Ice stimuli on the abdominal wall had varied effects on symptoms in patients with IBS and did not affect perception thresholds. Conclusions:, Visceral perception thresholds were decreased significantly after rectal thermal and pressure stimuli in patients with IBS. Visceral hypersensitivity may be one of the important pathogenic mechanisms in IBS. [source]