Key result
A novel wireless photoplethysmography sensor for assessing arteriovenous fistula blood-flow volume achieved high correlation (R2=0.7176) with ultrasound Doppler and RMSE under 289 ml/min.
Why the study?
Does a novel wireless PPG sensor accurately measure blood-flow volume in arteriovenous fistulas of hemodialysis patients compared to ultrasound Doppler?
Does a novel wireless PPG sensor accurately measure blood-flow volume in arteriovenous fistulas of hemodialysis patients compared to ultrasound Doppler?
Effect estimate: R2= 0.7176
A novel, low-cost, portable PPG sensor can accurately measure blood-flow volume in arteriovenous fistulas of hemodialysis patients, offering a potential alternative to ultrasound Doppler.
May support portable AVF monitoring in hemodialysis; leaves open need for larger validation trials before clinical use.
A novel blood-flow volume (BFV) sensor is presented for assessing quality of arteriovenous fistula in hemodialysis patients via noninvasive reflectance-type photoplethysmography (PPG). BFV is nowadays in clinic practices evaluated using an ultrasound Doppler monitor, which is expensive, bulky, and can only be operated by well-trained medical personnels. This study is devoted to develop a low-cost, small-sized, portable, and easy-to-use PPG sensor that is capable of continuous measurement of BFV. New designs of front-end analog circuits, signal processing, and an intelligent neural network calibration method are employed to finally achieve high correlation (R2= 0.7176), as opposed to the ultrasound Doppler monitor, with the root-mean-squared errors successfully controlled under 289 ml/min.
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Chiang et al. (2017) studied Hemodialysis patients with arteriovenous fistula. Wireless Photoplethysmography (PPG) Blood-Flow Volume Sensor vs. Ultrasound Doppler monitor was evaluated on Blood-flow volume measurement correlation and error (R2= 0.7176). A novel wireless photoplethysmography sensor for assessing arteriovenous fistula blood-flow volume achieved high correlation (R2=0.7176) with ultrasound Doppler and RMSE under 289 ml/min.
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