P170 A FOREHEAD AND NASAL BRIDGE PULSE OXIMETER COMPARISON MEASUREMENTS ON HEALTHY SUBJECTS

DOI

10.1016/j.artres.2018.10.223How to use a DOI?

Abstract

Photoplethysmography (PPG) is a biophotonic technique which measures blood volume variations in vascular bed and it is well known for its utilization in pulse oximetry for the estimation of arterial blood oxygen saturation. Moving particles within the tissue bed generate rapidly changing absorption caused by the heart beats, while stationary components will cause a relatively constant absorption. The detected light in PPG is therefore composed of an alternating pulsatile component (A) and a constant direct component (B), the both components are utilized for calculating the oxygen saturation estimation. The two LEDs (660 nm & 940 nm) are typical for pulse oximetry. In pulse oximetry, good high-quality RED LED and IR LED generate raw PPG signals (A + B) in both wavelength which are acquired by a single photosensor. Arterial oxygen saturation (SpO2) is estimated from PPG signals acquired from the custom-made nasal bridge PPG sensor and a commercial forehead SpO2 sensor (Medtronic). The SpO2 is calculated based on an empirical formula, SpO2 = 110−R*25, where R = [(A/B)]RED/[(A/B)]IRThe arterial oxygen saturation were 98-100% in healthy young subjects measured from the forehead, whereas elderly people gave 95% - 97%. The use of pulse oximeters increases, and their needs for higher performance. We have measured with the nasal bridge PPG based pulse oximeter and analyzed the test results according to the empirical equations.

Results: Show a rhythmic fluctuation caused, e.g., respiratory activity. The comparison between the commercial device with the custom-made nasal bridge device results were compared because they have different measurement location.

Open Access

This is an open access article distributed under the CC BY-NC license.

TY  - JOUR
AU  - Matti Huotari
AU  - Juha Röning
AU  - Kari Määttä
PY  - 2018
DA  - 2018/12/04
TI  - P170 A FOREHEAD AND NASAL BRIDGE PULSE OXIMETER COMPARISON MEASUREMENTS ON HEALTHY SUBJECTS
JO  - Artery Research
SP  - 130
EP  - 130
VL  - 24
IS  - C
SN  - 1876-4401
UR  - https://doi.org/10.1016/j.artres.2018.10.223
DO  - 10.1016/j.artres.2018.10.223
ID  - Huotari2018
ER  -