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Why use Finapres or Portapres rather than intra-arterial or intermittent non-invasive techniques of blood pressure measurement?

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Author: Langewouters, G.J. · Settels, J.J. · Roelandt, R. · Wesseling, K.H.
Type:article
Date:1998
Publisher: Taylor & Francis
Place: London
Institution: Technisch Physische Dienst TNO - TH
Source:Journal of Medical Engineering and Technology, 1, 22, 37-43
Identifier: 280482
Keywords: Perception · Spectrum analysis · Blood pressure measurement · Noninvasive medical procedures · Arterial pressure · Brachial artery · Diagnostic accuracy · Oscillation · Plethysmography · Pressoreceptor reflex · Pulse wave · Spectroscopy · Waveform · Artifacts · Auscultation · Baroreflex · Cardiac Output · Catheterization · Medical ethics · Heart Rate · Hypertension

Abstract

In the clinic, blood pressure is measured almost exclusively using non- invasive intermittent techniques, of which the auscultatory (Riva- Rocci/Korotkoff, RRK) and the computerized oscillometric method are most often used. However, both methods only provide a momentary value. In addition, the accuracy is hampered by phenomena such as cuff response and white coat hypertension, thus providing artefactually increased values. The vascular unloading technique of Penaz together with the Physiocal criteria of Wesseling provide reliable, non-invasive and continuous estimates of blood pressure. This technique is thus an alternative to the invasive intra- arterial measurements in many cases, without the risks and ethical questions inherent to invasive measurements. Since the pressure waveform is available continuously, computations such as pulse contour and Modelflow cardiac output, spectral analysis and baroreflex sensitivity provide further information on the dynamics of the cardiovascular system on a beat-to-beat basis, similar to intra-arterial measurements. In the clinic, blood pressure is measured almost exclusively using non-invasive intermittent techniques, of which the auscultatory (Riva-Rocci/Korotkoff, RRK) and the computerized oscillometric method are most often used. However, both methods only provide a momentary value. In addition, the accuracy is hampered by phenomena such as cuff response and white coat hypertension, thus providing artefactually increased values. The vascular unloading technique of Penaz together with the Physiocal criteria of Wesseling provide reliable, non-invasive and continuous estimates of blood pressure. This technique is thus an alternative to the invasive intra-arterial measurements in many cases, without the risks and ethical questions inherent to invasive measurements. Since the pressure waveform is available continuously, computations such as pulse contour and Modelflow cardiac output, spectral analysis and baroreflex sensitivity provide further information on the dynamics of the cardiovascular system on a beat-to-beat basis, similar to intra-arterial measurements.