Development of an optoelectronic sensor for the investigation of photoplethysmographic signals from the anterior fontanel of the newborn

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 optoelectronic sensor has been designed and developed for the investigation of photoplethysmographic (PPG) signals and blood oxygen saturation values from the fontanelle. In vivo thermal tests of the optical sensor show that under normal operating conditions the heating at the skin surface was negligible (<0.1°C). Good quality PPGs with large amplitudes and high signal to noise ratio were recorded at all three (red, infrared and green) wavelengths prior to clinical measurements. Permanent

Esophageal SpO<inf>2</inf> measurements from a pediatric burns-patient: A case study

“…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).…”

Photoplethysmographic and SpO<inf>2</inf> readings from the neonatal anterior fontanelle: A case Study

“…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.…”

“…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).…”

“…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.…”

Investigation of photoplethysmographs from the anterior fontanelle of neonates

“…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]. …”