A Novel Photodiode for Reflectance Pulse Oximetry in low-power applications

Haahr, Rasmus Grønbek; Duun, Sune; Birkelund, Karen; Raahauge, P.; Petersen, Peter; Dam, Henrik Friis; Nørgaard, Lars; Thomsen, Erik Vilain

doi:10.1109/iembs.2007.4352798

Cited by 8 publications

(7 citation statements)

References 10 publications

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“…One of the other ways to increase the area of the photoreceptor is to use a ring shape photoreceptor introduced in [33]. In this work, as it is shown in Figure 15, a ring shaped photodiode has been developed for a wearable reflection pulse oximeter.…”

Section: Leds and Photoreceptormentioning

confidence: 99%

A novel wireless ring-shaped multi-site pulse oximeter

AvakhKisomi¹,

Miled

Boukadoum

et al. 2016

2016 IEEE International Symposium on Circuits and Systems (ISCAS)

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Continuous health monitoring for patients with chronic diseases or people working in high-risk environments has been an interesting topic of research in recent years. In modern medical practice, the blood oxygen level is one of the vital signs of the body alongside blood pressure, heart rate, body temperature, and breathing rate. Pulse oximeters provide early information on problems in the respiratory and circulatory systems. They are widely used in intensive care, operating rooms, emergency care, birth and delivery, neonatal and pediatric care, sleep studies, and in veterinary care. Proper signal acquisition in a pulse oximetry system is essential to monitor the arterial oxygen saturation (SaO2). Since the tissue of finger has a complicated structure, and there is a lack of detailed information on the effect of the light source and detector placement on measuring SpO2, sensor placement plays an important role in this respect. Not enough sensors placed around the finger will have an adverse effect on the light path so high signal quality may become impossible to achieve. The conventional Pulse Oximeters use a finger clip, which uses only one set of LEDs and photodetector (PD). In addition to the inconvenience of the finger clips, the placement of the sensor is not fixed and will be affected by motion artifacts. In this thesis, we present a ring-shaped oximeter that uses six sets of light emitting diodes and photodetectors, uniformly distributed around the finger to identify the best signal path, thus making the signal acquisition immune to ring position on the finger. In addition, this system uses a radio transceiver to eliminate the connection wires to a base station which removes the inconvenience of the tethering and reduce the motion artifacts. In this proof of concept study, this novel ring oximeter is implemented with commercial low power consumption off-the-shelf components mounted on a rigid-flex board that connects to a remote host for signal processing and oxygen level calculation. v

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Section: Leds and Photoreceptormentioning

confidence: 99%

A novel wireless ring-shaped multi-site pulse oximeter

AvakhKisomi¹,

Miled

Boukadoum

et al. 2016

2016 IEEE International Symposium on Circuits and Systems (ISCAS)

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“…Pulse oximetry relies on the difference in the absorption spectra between oxygenated haemoglobin (HbO 2 ) and deoxygenated haemoglobin (Hb). In [9] it is shown that the ratio between absorption coefficients of HbO 2 and Hb makes wavelengths of 660 nm and 940 nm suitable.…”

Section: Pulse Oximetry Applicationmentioning

confidence: 99%

“…In this paper we report the recent development of a patient monitoring system the "Electronic Patch" shown in Fig. 1 which we previously have proposed [8], [9]. The patch can monitor various physiological signals, analyze these and when needed either transmit an alarm or continuously stream data over a wireless network.…”

Section: Introductionmentioning

confidence: 99%

A wearable “electronic patch” for wireless continuous monitoring of chronically diseased patients

Haahr

Duun

Thomsen

et al. 2008

2008 5th International Summer School and Symposium on Medical Devices and Biosensors

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Abstract-We present a wearable health system (WHS) for non-invasive and wireless monitoring of physiological signals. The system is made as an electronic patch where sensors, low power electronics, and radio communication are integrated in an adhesive material of hydrocolloid polymer making it a sticking patch. The patch is made with a reusable part and a disposable part which contains the adhesive material and the battery. This part is changed once every week. The patch has a size of 88 mm by 60 mm and a thickness of 5 mm. It is made for attachment on truncus or the greater muscle groups. The patch is demonstrated in two applications: Monitoring of electromyography (EMG) and arterial oxygen saturation by pulse oximetry (SpO2). The pulse oximetry sensor is made of a concentric backside Silicon photodiode with a hole in the middle for the two light sources. This makes it suitable for reflectance pulse oximetry. For the EMG application three standard dry silver electrodes are used separated by 10 mm.

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“…We have previously reported the design and development of an Electronic Patch with integrated reflective pulse oximetry based on a novel ring-shaped optical sensor [1], [2], [3]. The Electronic Patch is shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

Independent component analysis applied to pulse oximetry in the estimation of the arterial oxygen saturation (S<inf>p</inf>O<inf>2</inf>) - a comparative study

Jensen

Duun

Larsen

et al. 2009

2009 Annual International Conference of the IEEE Engineering in Medicine and Biology Society

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A Novel Photodiode for Reflectance Pulse Oximetry in low-power applications

Cited by 8 publications

References 10 publications

A novel wireless ring-shaped multi-site pulse oximeter

A novel wireless ring-shaped multi-site pulse oximeter

A wearable “electronic patch” for wireless continuous monitoring of chronically diseased patients

Independent component analysis applied to pulse oximetry in the estimation of the arterial oxygen saturation (S<inf>p</inf>O<inf>2</inf>) - a comparative study

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A Novel Photodiode for Reflectance Pulse Oximetry in low-power applications

Cited by 8 publications

References 10 publications

A novel wireless ring-shaped multi-site pulse oximeter

A novel wireless ring-shaped multi-site pulse oximeter

A wearable &#x201C;electronic patch&#x201D; for wireless continuous monitoring of chronically diseased patients

Independent component analysis applied to pulse oximetry in the estimation of the arterial oxygen saturation (S<inf>p</inf>O<inf>2</inf>) - a comparative study

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A wearable “electronic patch” for wireless continuous monitoring of chronically diseased patients