PaperarXiv:2608.18639
Change Point--Aware Evaluation and Re-Calibration of PPG-Based Blood Pressure Estimation
arXiv preprint (eess.SP, cs.AI, cs.LG) · MLHC 2026. The first two authors contribute equally
TL;DR
Non-invasive continuous blood pressure (BP) monitoring using photoplethysmography (PPG) is a promising alternative to cuff-based measurements. However, existing PPG-based BP estimation studies predominantly rely on aggregated performance metrics (e.g., mean absolute error) computed over entire evaluation intervals, which can obscure model failures during rapid BP fluctuations and limit clinical relevance.
- Form factor: wrist
Abstract
Non-invasive continuous blood pressure (BP) monitoring using photoplethysmography (PPG) is a promising alternative to cuff-based measurements. However, existing PPG-based BP estimation studies predominantly rely on aggregated performance metrics (e.g., mean absolute error) computed over entire evaluation intervals, which can obscure model failures during rapid BP fluctuations and limit clinical relevance. In this work, we propose a fluctuation-aware evaluation framework for PPG-based BP estimation based on time-series change point detection. Instead of heuristic BP thresholding (e.g., > 10mmHg), we identify BP change points by capturing abrupt distributional shifts in BP trajectories and evaluate estimation performance specifically during these fluctuation periods. Our analysis shows that several state-of-the-art models exhibit substantial performance degradation around BP change points, and that periodic test-time calibration is insufficient to handle such dynamic BP variations. To address this limitation, we introduce a targeted re-calibration framework triggered by detected BP change points, improving robustness without modifying model architectures. To the best of our knowledge, this is the first systematic evaluation of PPG-based BP estimation from a BP change point perspective, highlighting the importance of fluctuation-aware evaluation and calibration for real-world continuous BP monitoring.
Verbatim from arXiv (opens in a new tab) · arXiv metadata (abstracts are released under CC0)
Results on ChatPPG leaderboards
All leaderboardsNo results from this paper on ChatPPG leaderboards yet. Browse the leaderboards.
Tasks & signals
Tasks
Signals
Keywords
How it works
Cite this paper
APA
Tae, Y., Park, M., Rho, G., Yoo, D., & Joo, S. (2026). Change Point--Aware Evaluation and Re-Calibration of PPG-Based Blood Pressure Estimation. arXiv preprint · MLHC 2026. The first two authors contribute equally. https://doi.org/10.48550/arXiv.2608.18639
BibTeX
@misc{tae2026change,
title = {{Change Point--Aware Evaluation and Re-Calibration of PPG-Based Blood Pressure Estimation}},
author = {Tae, Yunwon and Park, Minje and Rho, Gyunho and Yoo, Dongjoon and Joo, Sunghoon},
year = {2026},
howpublished = {arXiv preprint · MLHC 2026. The first two authors contribute equally},
doi = {10.48550/arXiv.2608.18639},
eprint = {2608.18639},
archivePrefix = {arXiv}
}Built from the hub record. Check it against the publisher before submitting.
Added to the ChatPPG research hub
