THE APPLICATION OF PLASTIC FIBER OPTIC SENSOR AS BLOOD PRESSURE MONITORING

Fadli Ama (UNIVERSITAS AIRLANGGA)
Agus Muhamad Hatta (Department of Physical Engineering, Faculty of Industrial Technology and Systems Engineering, Institut Teknologi Sepuluh Nopember (ITS), Surabaya)
Katherin Indriawati (1 Department of Physical Engineering, Faculty of Industrial Technology and Systems Engineering, Institut Teknologi Sepuluh Nopember (ITS), Surabaya)
Frans R Agustiyanto (Department of Physics, Faculty of Tarbiyah and Educational Science, Universitas Islam Negeri (UIN) Mahmud Yunus Batusangkar, Sumatera Barat)
Shofi Afghania Usamah (Biomedical Engineering Study Program, Department of Physics, Faculty of Science and Technology, Universitas Airlangga (UNAIR), Surabaya)
Alfian Pramudita Putra (Biomedical Engineering Study Program, Department of Physics, Faculty of Science and Technology, Universitas Airlangga (UNAIR), Surabaya)
Sigit Dani Perkasa (Electrical Engineering Study Program, Department of Engineering, Faculty of Advanced Technology and Multidiscipline, Universitas Airlangga (UNAIR), Surabaya)

Indonesian Physical Review
Vol. 8 No. 1 (2025)

Continuous blood pressure monitoring is essential for early hypertension prevention and cardiovascular disease diagnosis. Traditional methods are unsuitable for long-term use due to discomfort and limited portability. This study presents a tapered plastic fiber optical sensor (PFOS) as a sustainable, non-invasive solution for continuous monitoring. The PFOS system employs a light modulator based on mechanical waves to detect arterial pressure changes, utilizing an infrared light source (940 nm). The cuffless design includes four configurations: Bend, Bend with 1 Scratch, Bend with 3 Scratches, and Straight with 3 Scratches. The Bend with 1 Scratch configuration demonstrated superior performance, achieving 99.84% accuracy, a mean absolute error (MAE) of 0.1564, a linearity of 0.9999, and a sensitivity of 2.9997 Hz/dBm. Experimental validation involved testing radial and brachial arteries. Blood pressure estimates from Pulse Transit Time (PTT) were compared to a standard sphygmomanometer. On the radial artery, the Bend with 1 Scratch configuration achieved the best results, with the lowest MAE (1.72 for SBP, 2.39 for DBP) and highest accuracy (98.30% for SBP, 96.56% for DBP). The Straight with 3 Scratches configuration performed best on the brachial artery, with an MAE of 2.81 for SBP and 5.11 for DBP, and accuracies of 97.21% for SBP and 92.67% for DBP. The PFOS system offers a promising option for continuous monitoring in clinical and home settings.