Recording and Analysis of Bowel Sounds

Area of Science:

• Medical Devices
• Gastroenterology
• Diagnostic Technology

Background:

• Acute abdominal diseases like appendicitis, mechanical ileus, and diffuse peritonitis require accurate and timely diagnosis.
• Traditional methods of assessing bowel sounds can be subjective and lack quantitative analysis.
• An objective, electronic system for bowel sound analysis could improve diagnostic accuracy.

Purpose of the Study:

• To construct an electronic bowel sound recording system.
• To evaluate the system's utility in diagnosing appendicitis, mechanical ileus, and diffuse peritonitis.
• To identify characteristic bowel sound features associated with specific acute abdominal conditions.

Main Methods:

• An electret microphone and laptop computer were used to record bowel sounds in 67 subjects (including 15 controls).
• Bowel sounds were analyzed using adjustable grids converted into binary matrices.
• Statistical analysis (p ≤ 0.05) was performed to compare sound characteristics across patient groups.

Main Results:

• Fewer bowel sounds were observed in patients with mechanical ileus (1004.4) and diffuse peritonitis (466.3) compared to controls (2179.3).
• Significant relationships (p ≤ 0.05) were found between specific binary matrix positions and disease groups (e.g., A1_T1/A1_T2 with mechanical ileus, A1_T2/A1_T4 with appendicitis, A5_T4/A1_T4 with diffuse peritonitis).

Conclusions:

• Distinct differences in bowel sound counts and binary matrix patterns exist among patients with acute abdominal diseases.
• The developed electronic system successfully indicated specific bowel sound features characteristic of appendicitis, mechanical ileus, and diffuse peritonitis.
• This technology shows promise for objective diagnosis of acute abdominal conditions based on acoustic properties of bowel sounds.