Title
Finometer, finger pressure measurements with the possibility to reconstruct brachial pressure
Author
Guelen, I.
Westerhof, B.E.
van der Sar, G.L.
van Montfrans, G.A.
Kiemeneij, F.
Wesseling, K.H.
Bos, W.J.W.
Gaubius Instituut TNO
Publication year
2003
Abstract
Objective: To evaluate three methods aimed at the reconstruction of brachial pressure from non-invasive finger arterial pressure measurements as implemented in the Finometer™, (FMS, Finapres Measurement Systems, Arnhem, Netherlands), the successor to the Finapres™ (TNO Siomedical Instrumentation, Amsterdam, Netherlands). Methods: Finger arterial pressure (FinAP) may differ from intra-brachial pressure (BAP). Pulse shape differences are removed by applying a generalized waveform filter. Pressure level differences are corrected by a generalized level correction equation using filtered systolic and diastolic levels and by level calibration, which uses an additional return-to-flow (RTF) systolic pressure measurement on the ipsilateral upper arm for an individual calibration of the reconstructed brachial pressure. Validation: These methods were validated in 37 subjects, aged 41 to 83 years after a cardiac catheterization procedure. Intra-brachial and Finometer pressures were recorded simultaneously. Finometer pressures were compared after application of waveform filtering and level correction (flcAP), and after an additional RTF calibration (reBAP). Results: Finger arterial systolic, diastolic and mean pressures for the group differed from SAP by -9.7 ± 13.0, -11.6 ± 8.0 and -16.3 ± 7.9 mmHg (mean ± SD) respectively. Similarly flcAP differed by -1.1 ± 10.7, -0.2 ± 6.8 and -1.5 ± 6.6 mmHg and reBAP differed by 3.1 ± 7.6, 4.0 ± 5.6 and 2.7 ± 4.7 mmHg. Conclusion: Reconstruction of BAP from FinAP as implemented in the Finometer reduces the pressure differences, with an individual RTF calibration to well within AAMI requirements. © 2003 Lippincott Williams & Wilkins.
Subject
Finapres™
Finger arterial pressure
Finometer™
Non-invasive
Reconstructed brachial pressure
Arterial pressure
Brachial artery
Conference paper
Device
Diastolic blood pressure
Digital artery
Heart catheterization
Pressure measurement
Systolic blood pressure
Waveform
Adult
Aged
Aged, 80 and over
Blood Pressure
Blood Pressure Determination
Brachial Artery
Calibration
Female
Fingers
Humans
Male
Middle Aged
Reproducibility of Results
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DOI
https://doi.org/10.1097/00126097-200302000-00006
TNO identifier
280279
ISSN
1359-5237
Source
Blood Pressure Monitoring, 8 (1), 27-30
Document type
article