Design and <i>In Vivo</i> Evaluation of a Non-Invasive Transabdominal Fetal Pulse Oximeter

Fong, Daniel D.; Yamashiro, Kaeli J.; Vali, Kourosh; Galganski, Laura A.; Thies, Jameson; Moeinzadeh, Rasta; Pivetti, Christopher D.; Knoesen, A.; Srinivasan, Vivek J.; Hedriana, Herman L.; Farmer, Diana L.; Johnson, Michael; Ghiasi, Soheil

doi:10.1109/tbme.2020.3000977

Cited by 20 publications

(13 citation statements)

References 45 publications

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“…Depending on the sensor and acquisition method, there are four mainstream methods to capture PPG signals, including oximetry, wearable devices, smartphone cameras, HD cameras, and many more. The oximeter and wearable device capture reflected or projected light intensity changes primarily through light-sensitive sensors [25], [26]. Smartphone cameras and HD cameras capture the change of RGB value among video frames to detect the change of blood flow in human tissue [27], [28].…”

Section: A Signal Acquisition Layermentioning

confidence: 99%

SoK: An Overview of PPG's Application in Authentication

Li¹,

Chen²,

Pan³

et al. 2022

Preprint

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Biometric authentication prospered during the 2010s. Vulnerability to spoofing attacks remains an inherent problem with traditional biometrics. Recently, unobservable physiological signals (e.g., Electroencephalography, Photoplethysmography, Electrocardiography) as biometrics have been considered a potential solution to this problem. In particular, Photoplethysmography (PPG) measures the change of blood flow of the human body by an optical method. Clinically, researchers commonly use PPG signals to obtain patients' blood oxygen saturation, heart rate, and other information to assist in diagnosing heart-related diseases. Since PPG signals are easy to obtain and contain a wealth of individual cardiac information, researchers have begun to explore its potential applications in information security. The unique advantages (simple acquisition, difficult to steal, and live detection) of the PPG signal allow it to improve the security and usability of the authentication in various aspects. However, the research on PPG-based authentication is still in its infancy. The lack of systematization hinders new research in this field. We conduct a comprehensive study of PPGbased authentication and discuss these applications' limitations before pointing out future research directions.

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Section: A Signal Acquisition Layermentioning

confidence: 99%

SoK: An Overview of PPG's Application in Authentication

Li¹,

Chen²,

Pan³

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…PPG pulse depth at two wavelengths is used to estimate the relative concentration of

in pulsating arterial tissue. Conventional invasive PO is performed using a probe placed on the fetus’ head while it is in the uterus and vaginal canal during labor [ 26 , 27 ]. However, transabdominal PO available today have apply near-infrared light transmitted to the maternal abdomen and fetus in order to measure the oxygen saturation in the fetal blood non-invasively [ 27 ].…”

Section: Fetal Acidosismentioning

confidence: 99%

A Review on Magnetic Induction Spectroscopy Potential for Fetal Acidosis Examination

Halim

Zakaria

Pusppanathan

et al. 2022

Sensors

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Fetal acidosis is one of the main concerns during labor. Currently, fetal blood sampling (FBS) has become the most accurate measurement of acidosis detection. However, it is invasive and does not provide a real time measurement due to laboratory procedures. Delays in diagnosis of acidosis have caused serious injury to the fetus, especially for the brain and the heart. This paper reviews the new technique in diagnosis of acidosis non-invasively. Magnetic Induction Spectroscopy (MIS) has been proposed to be a new device for acidosis detection in recent years. This paper explains the basic principle of MIS and outlines the design specifications and design considerations for a MIS pH probe. It is expected that readers will gain a basic understanding of the development of a MIS pH probe from this review.

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“…• Record the fetal and mother heart rates at the same time as optical imaging. This adds to the number of inputs into an algorithm or possibly additional hardware [25,39] Retrieving DC component of Fetal signal…”

Section: Challengesmentioning

confidence: 99%

“…The ratio was then found by using Equation (1). By doing so they demonstrate a wide range of fetal oxygen levels of a hypoxic fetal sheep [39]. In another sheep study, the group compared their transabdominal fetal oximeter to blood measurements of a single pregnant sheep and got an r 2 value of 0.86 [40].…”

Section: Preclinical Studiesmentioning

confidence: 99%

Review of optical methods for fetal monitoring in utero

Gunther

Jayet

Sekar

et al. 2022

Journal of Biophotonics

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The current technology for monitoring fetal wellbeing during child birth is cardiotocography. However, CTG has high false positive rates that lead to unnecessary emergency Cesarean deliveries and false negatives that result in birth injuries. To curtail these issues, fetal pulse oximetery has been a topic of interest for many decades. Fetal pulse oximetry would yield the oxygen saturation of the fetus in utero and provide a more robust marker for clinicians to make decisions about performing emergency Cesarean deliveries. Here, we present a review of biomedical optical developments related to transabdominal fetal pulse oximetery in the biophotonics field and the challenges that must be overcome to make transabdominal pulse oximetry a clinical reality.

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Design and In Vivo Evaluation of a Non-Invasive Transabdominal Fetal Pulse Oximeter

Cited by 20 publications

References 45 publications

SoK: An Overview of PPG's Application in Authentication

SoK: An Overview of PPG's Application in Authentication

A Review on Magnetic Induction Spectroscopy Potential for Fetal Acidosis Examination

Review of optical methods for fetal monitoring in utero

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