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Reproducibility and performance characteristics of colonic compliance, tone, and sensory tests in healthy humans.

Abstract：

BACKGROUND:The performance characteristics of colonic sensation and motility measurements are unclear. AIM:To compare left colon compliance, tone, and sensation in males and females and to evaluate inter and intra-individual coefficients of variation (COV) in these measurements. METHODS:Data were acquired using standard barostat methods, by one technologist, in 72 human volunteers (38 males, 18-65 years). We measured compliance, fasting tone, and sensation during baseline and post-placebo; postprandial (PP) tone was measured only post-placebo. Compliance and thresholds for first sensation, gas, and pain were measured using ascending method of limits; sensory ratings (0-100 mm VAS) using random phasic distensions at 8-36 mmHg above baseline operating pressure. Change in PP tone was measured by barostat balloon volume for the first 30 min after a 1000-kcal meal. Inter-COV was calculated as 100 (SD/mean), and intra-COV as (100 x SD delta/overall mean). RESULTS:There were no statistically significant associations with gender for most sensory or motor data at baseline. A modest association of fasting colonic tone and gender was observed. COV are lower (20-35%) for compliance, fasting tone, pain threshold, and sensation ratings than for PP tone and threshold for first or gas sensation (>45%). COV data are similar in males and females; sensation COVs appear smaller in females than in males. CONCLUSIONS:Testing of compliance, tone and pain, and gas sensation in left colon performs adequately to assess these functions in humans. Lower COV for sensation tests among females is relevant to plan studies of drugs intended for functional GI disorders.

journal_name

Dig Dis Sci

journal_title

Digestive diseases and sciences

authors

Odunsi ST,Camilleri M,Bharucha AE,Papathanasopoulos A,Busciglio I,Burton D,Zinsmeister AR

doi

10.1007/s10620-009-0772-x

subject

Has Abstract

pub_date

2010-03-01 00:00:00

pages

709-15

issue

3

eissn

0163-2116

issn

1573-2568

journal_volume

55

pub_type

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