Effect of Contact Force on Foetal Heart Sound Recordings

Lakshmi, Gottipati S; Bhaskaran, A; Bharadwaj, Sharadhi U; Arora, Manish

doi:10.1109/conecct50063.2020.9198435

Cited by 2 publications

(2 citation statements)

References 3 publications

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“…By considering the results, the studies mainly focused on the third trimester, and some of them Figure 15 represents the distributions of the validation population during the pregnancy period. Of note, RP22, CD7, and CD8 [55][56][57][58][59]70,[72][73][74][75][76][77] were validated in more than one population. Moreover, for 13 devices, the validation is present, but the information related to the gestational age is missing (gray bar in Figure 15).…”

Section: Validationmentioning

confidence: 99%

Acquisition Devices for Fetal Phonocardiography: A Scoping Review

Giordano,

Sbrollini,

Morettini

et al. 2024

Bioengineering

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Timely and reliable fetal monitoring is crucial to prevent adverse events during pregnancy and delivery. Fetal phonocardiography, i.e., the recording of fetal heart sounds, is emerging as a novel possibility to monitor fetal health status. Indeed, due to its passive nature and its noninvasiveness, the technique is suitable for long-term monitoring and for telemonitoring applications. Despite the high share of literature focusing on signal processing, no previous work has reviewed the technological hardware solutions devoted to the recording of fetal heart sounds. Thus, the aim of this scoping review is to collect information regarding the acquisition devices for fetal phonocardiography (FPCG), focusing on technical specifications and clinical use. Overall, PRISMA-guidelines-based analysis selected 57 studies that described 26 research prototypes and eight commercial devices for FPCG acquisition. Results of our review study reveal that no commercial devices were designed for fetal-specific purposes, that the latest advances involve the use of multiple microphones and sensors, and that no quantitative validation was usually performed. By highlighting the past and future trends and the most relevant innovations from both a technical and clinical perspective, this review will represent a useful reference for the evaluation of different acquisition devices and for the development of new FPCG-based systems for fetal monitoring.

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Section: Validationmentioning

confidence: 99%

Acquisition Devices for Fetal Phonocardiography: A Scoping Review

Giordano,

Sbrollini,

Morettini

et al. 2024

Bioengineering

View full text Add to dashboard Cite

show abstract

“…However, the sound signal can only reflect the fetal breathing movement and not the condition of the fetal heart [ 5 ]. The contact force of the sensor affects the quality of the acquired fetal heart sounds and there exists an optimum contact force for the sensors [ 6 ]. During recording, the high-quality segments can be automatically identified and selected, but the interference from the environment remains [ 7 ].…”

Section: Introductionmentioning

confidence: 99%

A Wireless High-Sensitivity Fetal Heart Sound Monitoring System

Wei

Wang

Xing

2020

Sensors

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In certain cases, the condition of the fetus can be revealed by the fetal heart sound. However, when the sound is detected, it is mixed with noise from the external environment as well as internal disturbances. Our exclusive sensor, which was constructed of copper with an enclosed cavity, was designed to prevent external noise. In the sensor, a polyvinylidene fluoride (PVDF) piezoelectric film, with a frequency range covering that of the fetal heart sound, was adopted to convert the sound into an electrical signal. The adaptive support vector regression (SVR) algorithm was proposed to reduce internal disturbance. The weighted-index average algorithm with deviation correction was proposed to calculate the fetal heart rate. The fetal heart sound data were weighted automatically in the window and the weight was modified with an exponent between windows. The experiments show that the adaptive SVR algorithm was superior to empirical mode decomposition (EMD), the self-adaptive least square method (LSM), and wavelet transform. The weighted-index average algorithm weakens fetal heart rate jumps and the results are consistent with reality.

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Effect of Contact Force on Foetal Heart Sound Recordings

Cited by 2 publications

References 3 publications

Acquisition Devices for Fetal Phonocardiography: A Scoping Review

Acquisition Devices for Fetal Phonocardiography: A Scoping Review

A Wireless High-Sensitivity Fetal Heart Sound Monitoring System

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