Abstract:This is the accepted version of the paper.This version of the publication may differ from the final published version. Abstract-There is a need for more reliable, non-invasive and alternative measurement sites for the monitoring of arterial blood oxygen saturation in critically ill newborns at times of peripheral compromise. The anterior fontanelle, a unique anatomical feature of the newborn, has been presented as an alternative site for the estimation of oxygen saturation. A multi-wavelength non-invasive opto… Show more
“…The technology of the PPG processing system has been previously described [5]. All PPG signals were digitized using a 16-bit data acquisition card (USB-6212, National Instruments, USA).…”
“…The technology of the PPG processing system has been previously described [5]. All PPG signals were digitized using a 16-bit data acquisition card (USB-6212, National Instruments, USA).…”
“…1). The technical details of this sensor have been described in a previous publication [7]. Also, an identical (optical and electrical) foot PPG sensor was also developed in order to provide PPG comparison 2 studies between the two sites.…”
Section: Methods a Instrumentationmentioning
confidence: 99%
“…Also, an identical (optical and electrical) foot PPG sensor was also developed in order to provide PPG comparison 2 studies between the two sites. A dual channel PPG processing system was also developed to detect and preprocess all acquired PPG signals (fontanelle and foot) simultaneously [7]. All PPG signals were digitized using a 16-bit data acquisition card (USB-6212, National Instruments, USA).…”
Section: Methods a Instrumentationmentioning
confidence: 99%
“…A new reflectance photoplethysmographic/SpO2 sensor has been designed and developed [7] in an effort to investigate PPGs signals and SpO2 values from the fontanelle in critically ill neonates. This paper describes the preliminary acquisition of PPGs and estimation of SpO2 values from the neonatal fontanelle.…”
“…A sensor for the peripheral location to aid the planned simultaneous acquisition of PPGs from either the hand or the foot was also constructed and was optically and electrically identical to the ANTF sensor. Both sensors were checked for electrical and thermal safety [12]. …”
This is the accepted version of the paper.This version of the publication may differ from the final published version. Abstract. Photoplethysmography (PPG) signals have been investigated at a new anatomical site, the anterior fontanelle (ANTF), on the hypothesis that blood supply at this location is preferentially preserved during cases of poor peripheral circulation which might cause the commercial pulse oximeters to fail to estimate accurately arterial blood oxygen saturation (SpO2). Two custom built reflectance PPG sensors have been developed, one for placement on the fontanelle and one on the periphery (foot). A PPG processing system and software were also developed to process the raw PPG signals and to estimate SpO2. A pilot study on sixteen babies, (9 male, 7 female) with a median age of 15.5 days (interquartile range = 46.8 days) and a median weight of 3.15 kg (SD = 0.93kg), on a neonatal intensive care unit (NICU) has been carried out. PPG signals from the ANTF were of good quality and high signal-to-noise ratio. The amplitudes of the ANTF PPGs were found to be sensitive to changes in amplitude when amplitudes were observed at the reference PPG site. Bland-Altman analysis of the gold standard blood gas analysis reveals that all three sensors are inaccurate at SaO2 < 85-90 %, but the ANTF sensor shows better mean difference than the commercial device.
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