Small intestinal clustered contractions and bacterial overgrowth: a frequent finding in obese patients.
BACKGROUND
Small intestinal bacterial overgrowth (SIBO) has been observed in several disorders of the gastrointestinal tract. Studies have shown abnormalities of motor function in obese patients, and there is indirect evidence suggesting that SIBO is present in them.


OBJECTIVE
To study small intestinal motility and the prevalence of SIBO in obese patients and to determine whether there was any relationship between both parameters.


METHODS
Thirty-nine patients scheduled for bariatric surgery were subjected to hydrogen breath test with lactulose and to a stationary small intestinal motility study with perfused catheters.


RESULTS
SIBO was observed in 41% of obese patients and was not related to body mass index. Small intestinal manometry showed a marked increase of clustered contractions in obese patients with SIBO compared to obese subjects without SIBO, whereas all the other parameters of fasting cyclic activity were not different.


CONCLUSIONS
SIBO was a frequent finding in obese patients and was associated with an increased pattern of clustered contractions, which was not observed in absence of SIBO.
Madrid
Ana María
AM
Section of Gastroenterology, University Hospital of University of Chile, University of Chile, Santos Dumont 999, Santiago, Chile. amadrid@redclinicauchile.cl
Poniachik
Jaime
J
Quera
Rodrigo
R
Defilippi
Carlos
C
D000328:Adult; D001765:Blind Loop Syndrome / Q000453:epidemiology / Q000503:physiopathology*; D001944:Breath Tests; D015897:Comorbidity; D005260:Female; D005769:Gastrointestinal Motility / Q000502:physiology; D006801:Humans; D007421:Intestine, Small / Q000503:physiopathology*; D008297:Male; D008365:Manometry; D008875:Middle Aged; D009119:Muscle Contraction / Q000502:physiology*; D009765:Obesity / Q000453:epidemiology / Q000503:physiopathology*; D015995:Prevalence; D012189:Retrospective Studies