Design of a finger base-type pulse oximeter.

A pulse oximeter is a common medical instrument used for noninvasively monitoring arterial oxygen saturation (SpO2). Currently, the fingertip-type pulse oximeter is the prevalent type of pulse oximeter used. However, it is inconvenient for long-term monitoring, such as that under motion. In this study, a wearable and wireless finger base-type pulse oximeter was designed and implemented using the tissue optical simulation technique and the Monte Carlo method. The results revealed that a design involving placing the light source at 135°-165° and placing the detector at 75°-90° or 90°-105° yields the optimal conditions for measuring SpO2. Finally, the wearable and wireless finger base-type pulse oximeter was implemented and compared with the commercial fingertip-type pulse oximeter. The experimental results showed that the proposed optimal finger base-type pulse oximeter design can facilitate precise SpO2 measurement.

[1]  Jun Q. Lu,et al.  Refractive indices of human skin tissues at eight wavelengths and estimated dispersion relations between 300 and 1600 nm , 2006, Physics in medicine and biology.

[2]  V. Tuchin,et al.  The refractive index of human hemoglobin in the visible range , 2011, Physics in medicine and biology.

[3]  W D Middleton,et al.  MR imaging of the finger: correlation with normal anatomic sections. , 1989, AJR. American journal of roentgenology.

[4]  A. Odon,et al.  Modeling and measurements of light transmission through human tissues , 2008 .

[5]  H Harry Asada,et al.  Mobile monitoring with wearable photoplethysmographic biosensors. , 2003, IEEE engineering in medicine and biology magazine : the quarterly magazine of the Engineering in Medicine & Biology Society.

[6]  Y. Mendelson,et al.  Noninvasive pulse oximetry utilizing skin reflectance photoplethysmography , 1988, IEEE Transactions on Biomedical Engineering.

[7]  Cheng Yang Huang,et al.  DESIGN OF A RING-TYPE REFLECTION PULSE OXIMETER WITH A PARABOLIC REFLECTOR , 2015 .

[8]  Ton G van Leeuwen,et al.  Oxygen saturation-dependent absorption and scattering of blood. , 2004, Physical review letters.

[9]  U. Bindig,et al.  Measurement of Optical Pulsation and Transmission Spectra as Reference for a Monte Carlo Simulation of the Finger Tip , 2009 .

[10]  Sijung Hu,et al.  Validation of a Monte Carlo platform for the optical modelling of pulse oximetry , 2007 .

[11]  Valery V. Tuchin,et al.  Optical properties of the subcutaneous adipose tissue in the spectral range 400–2500 nm , 2005 .

[12]  Andreas H. Hielscher,et al.  Development of a Finger Joint Phantom for Evaluation of Frequency Domain Measurement Systems , 2006, 2006 International Conference of the IEEE Engineering in Medicine and Biology Society.

[13]  K. Vollebregt,et al.  Comparison of OPS imaging and conventional capillary microscopy to study the human microcirculation. , 2001, Journal of applied physiology.

[14]  V. V. Tuchin.  Light scattering study of tissues , 1997 .

[15]  K J Reynolds,et al.  Vessel calibre and haemoglobin effects on pulse oximetry. , 2009, Physiological measurement.

[16]  Valery V. Tuchin,et al.  Immersion clearing of human blood in the visible and near-infrared spectral regions , 2005 .