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Heart and Lung Sound Measurement Using an Esophageal Stethoscope with Adaptive Noise Cancellation

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Abstract
Abstract: In surgeries where general anesthesia is required, the auscultation of heart and lung sounds
is essential to provide information on the patient’s cardiorespiratory system. Heart and lung sounds
can be recorded using an esophageal stethoscope; however, there is huge background noise when
this device is used in an operating room. In this study, a digital esophageal stethoscope system was
designed. A 3D-printed case filled with Polydimethylsiloxane material was designed to hold two
electret-type microphones. One of the microphones was placed inside the printed case to collect the
heart and lung sound signals coming out from the patient through the esophageal catheter, the other
was mounted on the surface of the case to collect the operating room sounds. A developed adaptive
noise canceling algorithm was implemented to remove the operating room noise corrupted with
the main heart and lung sound signals and the output signal was displayed on software application
developed especially for this study. Using the designed case, the noise level of the signal was reduced
to some extent, and by adding the adaptive filter, further noise reduction was achieved. The designed
system is lightweight and can provide noise-free heart and lung sound signals
Author(s)
Nourelhuda Mohamed김현석강규민Manal MohamedManal Mohamed김성훈김재관
Issued Date
2021
Type
Article
Keyword
adaptive noise cancelingdigital esophageal stethoscopeesophageal catheterleast mean squareSIMULINK
DOI
10.3390/s21206757
URI
https://oak.ulsan.ac.kr/handle/2021.oak/8933
https://ulsan-primo.hosted.exlibrisgroup.com/primo-explore/fulldisplay?docid=TN_cdi_doaj_primary_oai_doaj_org_article_95433a4741d745dbac629d868241f460&context=PC&vid=ULSAN&lang=ko_KR&search_scope=default_scope&adaptor=primo_central_multiple_fe&tab=default_tab&query=any,contains,Heart%20and%20Lung%20Sound%20Measurement%20Using%20an%20Esophageal%20Stethoscope%20with%20Adaptive%20Noise%20Cancellation&offset=0&pcAvailability=true
Publisher
SENSORS
Location
스위스
Language
한국어
ISSN
1424-8220
Citation Volume
21
Citation Number
20
Citation Start Page
6757
Citation End Page
6757
Appears in Collections:
Engineering > Medical Engineering
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