Searched for: subject%3A%22Arterial%255C%2Bpressure%22
(1 - 18 of 18)
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Kupreishvili, K. (author), ter Weeme, M. (author), Morré, S.A. (author), van den Brule, A.J.C. (author), Huybregts, M.A.J.M. (author), Quax, P.H.A. (author), ten Velden, J. (author), van Hinsbergh, V.W.M. (author), Stooker, W. (author), Eijsman, L. (author), Niessen, H.W.M. (author), TNO Kwaliteit van Leven (author)
Background: Several studies have suggested an association between Chlamydophila pneumoniae (Cp) infection and atherosclerosis. A recent study detected Cp DNA in the saphenous vein of 12% of all patients before bypass grafting and in 38% of failed grafts. We used a system in which human veins were perfused with autologous blood under arterial...
article 2008
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Jellema, W.T. (author), Groeneveld, A.B.J. (author), Wesseling, K.H. (author), Thijs, L.G. (author), Westerhof, N. (author), van Lieshout, J.J. (author)
OBJECTIVE: To establish the heterogeneity of hemodynamic responses to dobutamine in patients with septic shock and to identify the predictive factors of these hemodynamic responses. DESIGN: Prospective study. SETTING AND PATIENTS: A total of 12 patients with septic shock in a tertiary medical intensive care unit. INTERVENTIONS: A 20-min...
article 2006
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Gisolf, J. (author), Westerhof, B.E. (author), van Dijk, N. (author), Wesseling, K.H. (author), Wieling, W. (author), Karemaker, J.M. (author), TNO Industrie (author)
Objectives We set out to determine the effect of sublingual nitroglycerin (NTG), as used during routine tilt testing in patients with unexplained syncope, on hemodynamic characteristics and baroreflex control of heart rate (HR) and systemic vascular resistance (SVR). Background Nitroglycerin is used in tilt testing to elicit a vasovagal response...
article 2004
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van Lieshout, J.J. (author), Toska, K. (author), van Lieshout, E.J. (author), Eriksen, M. (author), Walløe, L. (author), Wesseling, K.H. (author), TNO Biomedical Instrumentation (author)
The proper understanding of the cardiovascular mechanisms involved in complaints of short-lasting dizziness and the evaluation of unexplained recurrent syncope requires continuous monitoring of cardiac stroke volume (SV) in addition to blood pressure and heart rate. The primary aim of the present study was to evaluate a pulse wave analysis...
article 2003
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Guelen, I. (author), Westerhof, B.E. (author), van der Sar, G.L. (author), van Montfrans, G.A. (author), Kiemeneij, F. (author), Wesseling, K.H. (author), Bos, W.J.W. (author), Gaubius Instituut TNO (author)
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...
article 2003
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Wesseling, K.H. (author)
Chemicals/CAS: phenylephrine, 532-38-7, 59-42-7, 61-76-7; Cardiotonic Agents; Phenylephrine, 59-42-7
article 2003
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TNO Kwaliteit van Leven (author), Hehenkamp, W.J.K. (author), Rang, S. (author), van Goudoever, J. (author), Bos, W.J.W. (author), Wolf, H. (author), van der Post, J.A.M. (author)
Background: Continuous beat-to-beat noninvasive blood pressure (BP) measurement is possible with Portapres®. It constructs finger arterial waveforms beat-to-beat. Dedicated software is used to analyze the arterial waveforms. A new technique has been developed to reconstruct brachial intraarterial pressure that uses return to flow (RTF). This...
article 2002
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Koopmans, S.J. (author), Jong, M.C. (author), Que, I. (author), Dahlmans, V.E.H. (author), Pijl, H. (author), Radder, J.K. (author), Frölich, M. (author), Havekes, L.M. (author), Gaubius Instituut TNO (author)
Aims/hypothesis. Insulin resistance for glucose metabolism is associated with hyperlipidaemia and high blood pressure. In this study we investigated the effect of primary hyperlipidaemia on basal and insulin-mediated glucose and on non-esterified fatty acid (NEFA) metabolism and mean arterial pressure in hyperlipidaemic transgenic mice...
article 2001
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Jansen, J.R.C. (author), Schreuder, J.J. (author), Mulier, J.P. (author), Smith, N.T. (author), Settels, J.J. (author), Wesseling, K.H. (author), Technisch Physische Dienst TNO - TH (author)
In three clinical centres, we compared a new method for measuring cardiac output with conventional thermodilution. The new method computes beat-to-beat cardiac output from radial artery pressure by simulating a three-element model of aortic input impedance, and includes non-linear aortic mechanical properties and a self-adapting systemic...
article 2001
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Jellema, W.T. (author), Imholz, B.P.M. (author), Oosting, H. (author), Wesseling, K.H. (author), van Lieshout, J.J. (author), TNO Biomedical Instrumentation (author)
Objective: The aim of this study was to compare beat-to-beat changes in stroke volume (SV) estimated by two different pressure wave analysis techniques during orthostatic stress testing: pulse contour analysis and Modelflow, ie, simulation of a three-element model of aortic input impedance. Methods: A reduction in SV was introduced in eight...
article 1999
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Langewouters, G.J. (author), Settels, J.J. (author), Roelandt, R. (author), Wesseling, K.H. (author), Technisch Physische Dienst TNO - TH (author)
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...
article 1998
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Imholz, B.P.M. (author), Wieling, W. (author), van Montfrans, G.A. (author), Wesseling, K.H. (author), TNO Biomedical Instrumentation (author)
We review the Finapres technology, embodied in several TNO-prototypes and in the Ohmeda 2300 and 2300e Finapres NIBP. Finapres is an acronym for FINger Arterial PRESsure, the device delivers a continuous finger arterial pressure waveform. Many papers report on the accuracy of the device in comparison with intra-arterial or with noninvasive but...
article 1998
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de Jong-de Vos Van Steenwijk, C.C.E. (author), Imholz, B.P.M. (author), Wesseling, K.H. (author), Wieling, W. (author), TNO Biomedical Instrumentation (author)
The objective of this study was to determine whether the Valsalva manoeuvre is applicable as a test for neurocardiovascular control in healthy children and teenagers. Sixty-eight 6- to 16-year-old children and teenagers performed two Valsalva manoeuvres in the sitting position. They were instructed to maintain airway pressure (strain) for 15 s...
article 1997
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Jellema, W.T. (author), Imholz, B.P.M. (author), van Goudoever, J. (author), Wesseling, K.H. (author), van Lieshout, J.J. (author), Technisch Physische Dienst TNO - TH (author)
1. The aims of this study were to determine the clinical feasibility of continuous, non-invasive Finapres recordings as a replacement for intrabrachial pressure during a 30 min head-up tilt, and the reliability of continuous cardiac output computation by pulse contour analysis from the finger arterial versus the brachial waveform. 2. In eight...
article 1996
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Schultze, A.E. (author), Emeis, J.J. (author), Roth, R.A. (author), Gaubius Instituut TNO (author)
The monocrotaline pyrrole (MCTP)-treated rat is a useful model for the study of certain chronic pulmonary vascular diseases. A single, i.v. administration of a low dose of MCTP causes pneumotoxicity, pulmonary vascular remodeling, sustained increases in pulmonary arterial pressure, and right ventricular hypertrophy in rats. The pulmonary...
article 1996
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Havenith, G. (author), Luttikholt, V.G.M. (author), Vrijkotte, T.G.M. (author)
The present study was designed to determine the relative importance of individual characteristics such as maximal oxygen uptake (V_O2 max), adiposity, DuBois body surface area (AD), surface to mass ratio (AD:mass) and body mass, for the individ-ual's reaction to humid heat stress. For this purpose 27 subjects (19 men, 8 women),eterogeneous...
article 1995
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Havenith, G. (author), Inoue, Y. (author), Luttikholt, V. (author), Kenny, W.L. (author)
Cross-section comparisons of the effect of age on physiological responses to heat stress have yielded conflicting results, in part because of the inability to separate chronological age from factors which change in concert with the biological aging process. The present study was designed to examine the relative influence of age on cardiovascular...
article 1995
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TNO Biomedical Instrumentation (author), Wesseling, K.H. (author), Jansen, J.R.C. (author), Settels, J.J. (author), Schreuder, J.J. (author)
We computed aortic flow pulsations from arterial pressure by simulating a nonlinear, time-varying three-element model of aortic input impedance. The model elements represent aortic characteristic impedance, arterial compliance, and systemic vascular resistance. Parameter values for the first two elements were computed from a published, age...
article 1993
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