Analysis of Possibilities of the Optical Fibers Usage in the Microprocessor Pulse - Oximeter

Kusznier, Jacek; Wojtkowski, Wojciech

doi:10.1016/j.ifacol.2019.12.722

Cited by 2 publications

(2 citation statements)

References 12 publications

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“…After the next cardiac cycle is completed, using the determined values Imax,j and Imin,j, the auxiliary values Rj are calculated according to formula (10), then the functional saturation and saturation with HbCO are calculated according to formulas ( 13) -( 19), (25), and (24).…”

Section: Principles Of Development Of a Pulse Oximeter For Measuring ...mentioning

confidence: 99%

A pulse oximeter for measuring the blood oxygenation level considering the carboxyhemoglobin concentration: principles of development, computer model and accuracy assessment

Sheikus,

Prasol,

Datsok

2024

reks

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The main method for estimating the level of arterial blood oxygenation is pulse oximetry, which has the advantages of being fast, simple, reliable, and non-invasive. However, in well-known pulse oximeters, oxygen saturation is determined only by hemoglobin functional fractions, which reduces the device accuracy and is unacceptable in certain clinical cases. The known pulse oximeter improvement that considers the dysfunctional fraction concentration, especially carboxyhemoglobin, when measuring the level of blood oxygenation is an actual scientific and technical task. The research subjects. Mathematical, algorithmic, and technical support of a pulse oximeter that measures blood oxygenation levels considering the carboxyhemoglobin concentration. Objective. To expand the pulse oximeter functionality to consider the concentration of carboxyhemoglobin in arterial blood. Methods. Methods of computer simulation for developing a model and estimating the pulse oximeter accuracy that measures the blood oxygenation level considering the carboxyhemoglobin concentration. Results. The theoretical statements of measuring the level of blood oxygenation considering the carboxyhemoglobin concentration and the simplest pulse oximeter structural diagram for measuring are developed. An additional LED used in the pulse oximeter is proposed, and the wavelength choice is justified on the condition of maximizing the carboxyhemoglobin contribution to the optical density of the biological object. Computer models of a traditional pulse oximeter and a pulse oximeter with an additional LED were developed, simulation research was conducted using the developed models, and the device accuracy for measuring the level of blood oxygenation was estimated considering the carboxyhemoglobin concentration. Conclusions. Simulation studies based on the developed models show that the proposed pulse oximeter, compared with the known one, allows determining and estimating a decrease in blood oxygenation caused by the carboxyhemoglobin concentration increasing in the patient’s blood. Considering that light is also absorbed by the third derivative of hemoglobin, carboxyhemoglobin, increases the accuracy of the proposed pulse oximeter in measuring functional saturation.

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Section: Principles Of Development Of a Pulse Oximeter For Measuring ...mentioning

confidence: 99%

A pulse oximeter for measuring the blood oxygenation level considering the carboxyhemoglobin concentration: principles of development, computer model and accuracy assessment

Sheikus,

Prasol,

Datsok

2024

reks

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“…This paper describes the first implementation of a textile-based multichannel SpO 2 measurement system and an investigation in a human volunteer study. It should be noted that there are several examples of using optical fibres for pulse oximetry [ 22 , 24 , 25 ] but, these are not integrated into textiles nor use a multichannel approach. A sleeve has been fabricated with four integrated optical fibre probes to measure light reflected from the wrist at two different wavelengths (660 and 850 nm).…”

Section: Introductionmentioning

confidence: 99%

A Textile Sleeve for Monitoring Oxygen Saturation Using Multichannel Optical Fibre Photoplethysmography

Ballaji

Correia

Korposh

et al. 2020

Sensors

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Textile-based systems are an attractive prospect for wearable technology as they can provide monitoring of key physiological parameters in a comfortable and unobtrusive form. A novel system based on multichannel optical fibre sensor probes integrated into a textile sleeve is described. The system measures the photoplethysmogram (PPG) at two wavelengths (660 and 830 nm), which is then used to calculate oxygen saturation (SpO2). In order to achieve reliable measurement without adjusting the position of the garment, four plastic optical fibre (POF) probes are utilised to increase the likelihood that a high-quality PPG is obtained due to at least one of the probes being positioned over a blood vessel. Each probe transmits and receives light into the skin to measure the PPG and SpO2. All POFs are integrated in a stretchable textile sleeve with a circumference of 15 cm to keep the sensor in contact with the subject’s wrist and to minimise motion artefacts. Tests on healthy volunteers show that the multichannel PPG sensor faithfully provides an SpO2 reading in at least one of the four sensor channels in all cases with no need for adjusting the position of the sleeve. This could not be achieved using a single sensor alone. The multichannel sensor is used to monitor the SpO2 of 10 participants with an average wrist circumference of 16.0 ± 0.6 cm. Comparing the developed sensor’s SpO2 readings to a reference commercial oximeter (reflectance Masimo Radical-7) illustrates that the mean difference between the two sensors’ readings is −0.03%, the upper limit of agreement (LOA) is 0.52% and the lower LOA is −0.58%. This multichannel sensor has the potential to achieve reliable, unobtrusive and comfortable textile-based monitoring of both heart rate and SpO2 during everyday life.

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Analysis of Possibilities of the Optical Fibers Usage in the Microprocessor Pulse - Oximeter

Cited by 2 publications

References 12 publications

A pulse oximeter for measuring the blood oxygenation level considering the carboxyhemoglobin concentration: principles of development, computer model and accuracy assessment

A pulse oximeter for measuring the blood oxygenation level considering the carboxyhemoglobin concentration: principles of development, computer model and accuracy assessment

A Textile Sleeve for Monitoring Oxygen Saturation Using Multichannel Optical Fibre Photoplethysmography

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