Recording and Analysis of Bowel Sounds.

Daniel Zaborski,Wilhelm Grzesiak,Miroslaw Halczak,Andrzej Modrzejewski

doi:10.5005/jp-journals-10018-1137

Abstract

BackgroundThe aim of this study was to construct an electronic bowel sound recording system and determine its usefulness for the diagnosis of appendicitis, mechanical ileus and diffuse peritonitis.Materials and methodsA group of 67 subjects aged 17 to 88 years including 15 controls was examined. Bowel sounds were recorded using an electret microphone placed on the right side of the hypogastrium and connected to a laptop computer. The method of adjustable grids (converted into binary matrices) was used for bowel sounds analysis.ResultsSignificantly, fewer (p ≤ 0.05) sounds were found in the mechanical ileus (1004.4) and diffuse peritonitis (466.3) groups than in the controls (2179.3). After superimposing adjustable binary matrices on combined sounds (interval between sounds <0.01 s), significant relationships (p ≤ 0.05) were found between particular positions in the matrices (row-column) and the patient groups. These included the A1_T1 and A1_T2 positions and mechanical ileus as well as the A1_T2 and A1_T4 positions and appendicitis. For diffuse peritonitis, significant positions were A5_T4 and A1_T4.ConclusionDifferences were noted in the number of sounds and binary matrices in the groups of patients with acute abdominal diseases. Certain features of bowel sounds characteristic of individual abdominal diseases were indicated.List of abbreviationsBS: bowel sound; APP: appendicitis; IL: mechanical ileus; PE: diffuse peritonitis; CG: control group; NSI: number of sound impulses; NCI: number of combined sound impulses; MBS: mean bit-similarity; TMIN: minimum time between impulses; TMAX: maximum time between impulses; TMEAN: mean time between impulses.How to cite this articleZaborski D, Halczak M, Grzesiak W, Modrzejewski A. Recording and Analysis of Bowel Sounds. Euroasian J Hepato-Gastroenterol 2015;5(2):67-73.

Highlights

The aim of this study was to construct an electronic bowel sound recording system and determine its usefulness for the diagnosis of appendicitis, mechanical ileus and diffuse peritonitis
Significantly, fewer (p ≤ 0.05) sounds were found in the mechanical ileus (1004.4) and diffuse peritonitis (466.3) groups than in the controls (2179.3)
Differences were noted in the number of sounds and binary matrices in the groups of patients with acute abdominal diseases

Summary

Introduction

The aim of this study was to construct an electronic bowel sound recording system and determine its usefulness for the diagnosis of appendicitis, mechanical ileus and diffuse peritonitis. Intestinal motility depends on many factors, such as the amount and type of ingested food, emotional state, drugs,[2] disease entities and operative procedures. The peristalsis of the digestive tract is accompanied by sounds[3,4,5] whose source is the passing mixture of chyme and gas.[6] Clinical examination includes the auscultation of peristaltic sounds using a stethoscope.[7] The character of bowel sounds (BS) altered in acute abdominal diseases and after operative procedures is an important diagnostic indicator. The complete absence of these sounds indicates complete paralytic ileus and occurs mainly in the diffuse peritonitis, appendicular perforation, peptic ulcer perforation, in the final phase of mechanical ileus and in intraperitoneal bleeding. In which the peritoneal cavity is opened, result in the Euroasian Journal of Hepato-Gastroenterology, July-December 2015;5(2):[67-73] temporary intestinal paralysis and, the absence of BS.[7,8,9,10]

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