• Kamal Jafarian, Majid Amineslami, Kamran Hassani, Mahdi Navidbakhsh, Mohammad Niakan Lahiji, and D John Doyle.
• Department of Biomechanics, Science and Research Branch, Islamic Azad University, Tehran, Iran.
• J Clin Monit Comput. 2016 Feb 1; 30 (1): 107-18.

AbstractThis study pertains to a six-channel acoustic monitoring system for use in patient monitoring during or after surgery. The base hardware consists of a USB data acquisition system, a custom-built six-channel amplification system, and a series of microphones of various designs. The software is based on the MATLAB platform with data acquisition drivers installed. The displayed information includes: time domain signals, frequency domain signals, and tools to aid in the detection of endobronchial intubation. We hypothesize that the above mentioned arrangement may be helpful to the anesthesiologist in recognizing clinical conditions like wheezing, bronchospasm, endobronchial intubation, and apnea. The study also evaluated various types of microphone designs used to transduce breath sounds. The system also features selectable band-pass filtering using MATLAB algorithms as well as a collection of recordings obtained with the system to establish what respiratory acoustic signals look like under various conditions.

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