Detection of Pathologic Heart Murmurs Using a Piezoelectric Sensor

Takahashi, Kiichi; Ono, Koichi; Arai, Hirokazu; Adachi, Hiroyuki; Ito, Masato; Kato, Akie; Takahashi, Tsutomu

doi:10.3390/s21041376

Cited by 12 publications

(3 citation statements)

References 24 publications

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“…Digital Stethoscopes have been used to record heart and respiratory sounds in infants and children. Some studies have used the recordings as part of investigation of techniques for analysis of heart murmurs [ 53 , 54 ]. A few studies which have investigated using digital stethoscopes in the delivery room have noted some limitations when assessing heart rate in crying babies [ 43 , 44 ].…”

Section: Resultsmentioning

confidence: 99%

Non-invasive sensor methods used in monitoring newborn babies after birth, a clinical perspective

Anton

Dore

Rendon-Morales

et al. 2022

matern health, neonatol and perinatol

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Background Reducing the global new-born mortality is a paramount challenge for humanity. There are approximately 786,323 live births in the UK each year according to the office for National Statistics; around 10% of these newborn infants require assistance during this transition after birth. Each year around, globally around 2.5 million newborns die within their first month. The main causes are complications due to prematurity and during delivery. To act in a timely manner and prevent further damage, health professionals should rely on accurate monitoring of the main vital signs heart rate and respiratory rate. Aims To present a clinical perspective on innovative, non-invasive methods to monitor heart rate and respiratory rate in babies highlighting their advantages and limitations in comparison with well-established methods. Methods Using the data collected in our recently published systematic review we highlight the barriers and facilitators for the novel sensor devices in obtaining reliable heart rate measurements. Details about difficulties related to the application of sensors and interfaces, time to display, and user feedback are explored. We also provide a unique overview of using a non-invasive respiratory rate monitoring method by extracting RR from the pulse oximetry trace of newborn babies. Results Novel sensors to monitor heart rate offer the advantages of minimally obtrusive technologies but have limitations due to movement artefact, bad sensor coupling, intermittent measurement, and poor-quality recordings compared to gold standard well established methods. Respiratory rate can be derived accurately from pleth recordings in infants. Conclusion Some limitations have been identified in current methods to monitor heart rate and respiratory rate in newborn babies. Novel minimally invasive sensors have advantages that may help clinical practice. Further research studies are needed to assess whether they are sufficiently accurate, practical, and reliable to be suitable for clinical use.

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Section: Resultsmentioning

confidence: 99%

Non-invasive sensor methods used in monitoring newborn babies after birth, a clinical perspective

Anton

Dore

Rendon-Morales

et al. 2022

matern health, neonatol and perinatol

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“…It is worth noting that many devices used in the reviewed studies were devices originally designed for children (n = 8), adults (n = 11), or unspecified n = 8), rather than specifically for neonates. [9][10][11][12][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43][45][46][47][48][49][50][51] While sound quality assessment and sound separation AI programs can help isolate high-quality sounds, they have limitations and do not address the issue of having lowquality sounds in the first place. [9][10][11][12]28 Alternatively, a DS specifically designed for neonates could be a viable solution to improve the device's capacity in producing high-quality neonatal sounds.…”

Section: Telemedicinementioning

confidence: 99%

Digital Stethoscope Use in Neonates: A Systematic Review

Roff,

Slifirski,

Grooby

et al. 2023

Newborn

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Aim: To assess the evidence for the use of digital stethoscopes in neonates and evaluate whether they are effective, appropriate, and advantageous for neonatal auscultation. Methods: A systematic review and narrative synthesis of studies published between January 1, 1990 and May 29, 2023 was conducted following searches of MEDLINE, Embase, PubMed, Scopus, and Google Scholar databases, as well as trial registries. Results: Of 3,852 records identified, a total of 41 papers were eligible and included in the narrative synthesis. Thirteen records were non-full-text articles, either in the form of journal letters or conference abstracts, and these were included separately for completion purposes but may be unreliable. Twenty eight papers were full-text articles and were included in a full qualitative analysis. Digital stethoscopes have been studied in neonatology across various clinical areas, including artificial intelligence for sound quality assessment and chest sound separation (n = 5), cardiovascular sounds (n = 11), respiratory sounds (n = 4), bowel sounds (n = 4), swallowing sounds (n = 2), and telemedicine (n = 2). This paper discusses the potential utility of digital stethoscope technology for the interpretation of neonatal sounds for both humans and artificial intelligence. The limitations of current devices are also assessed. Conclusions:The utilization of digital stethoscopes in neonatology is an emerging field with a wide range of potential applications, which has the capacity to advance neonatal auscultation. Artificial intelligence and digital stethoscope technology offer novel objective avenues for automatic pathological sound detection. Further, digital stethoscopes may improve our scientific understanding of normal neonatal physiology and can be employed in telemedicine to facilitate remote medical access. Digital stethoscopes can also provide phonocardiograms, enabling enhanced interpretation of neonatal cardiac sounds. However, current digital stethoscopes necessitate refinement as they consistently produce low-quality sounds when used on neonates.

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“…It is based on the piezoelectric effect, and it is widely used in applications where contact is a requirement. Such types of sensors have already been applied in the detection of murmurs [38].…”

Section: Piezoelectric Diaphragms 7bb-35-3l0mentioning

confidence: 99%

Exploring Microphone Technologies for Digital Auscultation Devices

Zauli,

Peppi,

Di Bonaventura

et al. 2023

Micromachines

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The aim of this work is to present a preliminary study for the design of a digital auscultation system, i.e., a novel wearable device for patient chest auscultation and a digital stethoscope. The development and testing of the electronic stethoscope prototype is reported with an emphasis on the description and selection of sound transduction systems and analog electronic processing. The focus on various microphone technologies, such as micro-electro-mechanical systems (MEMSs), electret condensers, and piezoelectronic diaphragms, intends to emphasize the most suitable transducer for auscultation. In addition, we report on the design and development of a digital acquisition system for the human body for sound recording by using a modular device approach in order to fit the chosen analog and digital mics. Tests were performed on a designed phantom setup, and a qualitative comparison between the sounds recorded with the newly developed acquisition device and those recorded with two commercial digital stethoscopes is reported.

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Detection of Pathologic Heart Murmurs Using a Piezoelectric Sensor

Cited by 12 publications

References 24 publications

Non-invasive sensor methods used in monitoring newborn babies after birth, a clinical perspective

Non-invasive sensor methods used in monitoring newborn babies after birth, a clinical perspective

Digital Stethoscope Use in Neonates: A Systematic Review

Exploring Microphone Technologies for Digital Auscultation Devices

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