多通道腸音量測與定位系統

Abstract

腹部聽診是臨床上較簡單的非侵入式診斷腸胃疾病的方法，由於醫師無法長時間對同一病人做腸音的聽診，且過去的系統只限於單一點的量測，所得腸音的資料不足以診斷整體腸部狀態。因此我們本系統主要是發展一套多點腸音定位量測系統，作出整個腸部的定位量測，對不同位置的腸音訊號進行記錄和比較的工作。 整個系統的類比電路包括感測器-電容式麥克風、前置放大器、帶通濾波器電路，濾波之後的訊號接到轉接板透過資料擷取裝置將數位化的腸音資料以傳送至電腦作儲存。 目前已經可以同時量取到九點的腸音訊號，做一長時間的記錄。同時能偵測出腸音頻率分布與特徵，而同一時間在各點所量取的腸音訊號，也可有效辨別出發生腸音之位置，此系統將可幫助醫師的診斷及瞭解腸子的蠕動。 關鍵詞：腹部聽診、非侵入式、腸音

Abdominal auscultation is a simple and noninvasive way to provide the clinical diagnosis reference for gastrointestinal disease. However, the auscultation of bowel sound is a time consuming work for a doctor. The anterior system only measure one channel data of bowel sound, but the data is not enough to diagnose entire intestine. Therefore, it is needful to develop a multi-channel measure bowel sound system for diagnosing entire intestine, recording, and comparing bowel sound signal in every different position. The entire system includes analog circuit：sensor - electrical consider microphone, pr-amplifier ,band pass filter circuit. and Data Acquire interface . Using Data Acquire interface we transmit the digital bowel sound data to computer and then we can save it and display. The system is able to detect and record the signals in nine different positions for a long time. It can find the frequency distribution and characterize of bowel sound. It also distinguishes the position of the bowel sound. The data will help the doctor to diagnose and know the state of bowel wriggle. Keywords: Abdominal auscultation, Noninvasive, Bowel sound