title: Adaptive control with self-tuning for non-invasive beat-by-beat blood pressure measurement.
abstract: Up to now, we have successfully carried out the non-invasive beat-by-beat measurement of blood pressure (BP) in the root of finger, superficial temporal and radial artery based on the volume-compensation technique with reasonable accuracy. The present study concerns with improvement of control method for this beat-by-beat BP measurement. The measurement system mainly consists of a partial pressurization cuff with a pair of LED and photo-diode for the detection of arterial blood volume, and a digital self-tuning control method. Using healthy subjects, the performance and accuracy of this system were evaluated through comparison experiments with the system using a conventional empirically tuned PID controller. The significant differences of BP measured in finger artery were not showed in systolic (SBP), p=0.52, and diastolic BP (DBP), p=0.35. With the advantage of the adaptive control with self-tuning method, which can tune the control parameters without disturbing the control system, the application area of the non-invasive beat-by-beat measurement method will be broadened.
authors.affiliation: Kanazawa University Graduate School of Natural Science and Technology, Kanazawa, Japan. nogawa@ t.kanazawa-u.ac.jp
authors.forename: Masamichi
authors.initials: M
authors.lastname: Nogawa
authors.forename: Mitsuhiro
authors.initials: M
authors.lastname: Ogawa
authors.forename: Takehiro
authors.initials: T
authors.lastname: Yamakoshi
authors.forename: Shinobu
authors.initials: S
authors.lastname: Tanaka
authors.forename: Ken-ichi
authors.initials: K
authors.lastname: Yamakoshi
mesh_terms: D001794:Blood Pressure; D006801:Humans; D009200:Myocardial Contraction