title: A multi-channel acoustics monitor for perioperative respiratory monitoring: preliminary data.
abstract: This 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.
authors: Department of Biomechanics, Science and Research Branch, Islamic Azad University, Tehran, Iran.
authors: Kamal
authors: K
authors: Jafarian
authors: Department of Biomechanics, Science and Research Branch, Islamic Azad University, Tehran, Iran.
authors: Majid
authors: M
authors: Amineslami
authors: Department of Biomechanics, Science and Research Branch, Islamic Azad University, Tehran, Iran. k.hasani@srbiau.ac.ir.
authors: Kamran
authors: K
authors: Hassani
authors: Faculty of Mechanical Engineering, Iran University of Science and Technology, Tehran, Iran.
authors: Mahdi
authors: M
authors: Navidbakhsh
authors: Iran University of Medical Science, Tehran, Iran.
authors: Mohammad Niakan
authors: MN
authors: Lahiji
authors: Department of General Anesthesiology, Anesthesiology Institute, Cleveland Clinic Abu Dhabi, Abu Dhabi, UAE.
authors: D John
authors: DJ
authors: Doyle
mesh_terms: D000162:Acoustics; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003626:Data Display; D003936:Diagnosis, Computer-Assisted / Q000295:instrumentation*; D005240:Feasibility Studies; D005260:Female; D006326:Heart Auscultation / Q000295:instrumentation* / Q000379:methods; D006801:Humans; D008297:Male; D008875:Middle Aged; D016343:Monitoring, Intraoperative / Q000295:instrumentation* / Q000379:methods; D019990:Perioperative Care / Q000295:instrumentation* / Q000379:methods; D010865:Pilot Projects; D015203:Reproducibility of Results; D012129:Respiratory Function Tests / Q000295:instrumentation* / Q000379:methods; D012680:Sensitivity and Specificity; D013018:Sound Spectrography / Q000295:instrumentation / Q000379:methods; D014584:User-Computer Interface
keywords: Heart sound monitoring; Lung sound monitoring; Tracheal sound monitoring; Ventilator acoustic monitoring