The upgraded Finapres 2300e

Jones, R. D. M.; Brown, A. G. P.; Roulson, C. J.; Smith, Ingrid; Chan, S. C.

doi:10.1111/j.1365-2044.1992.tb02396.x

Cited by 28 publications

(2 citation statements)

References 15 publications

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“…The Finapress method has previously been validated during anaesthesia and during the Valsalva manoeuvre and shown to reproduce the intra-arterial blood pressure quite well (Irnholz et al 1988, Pace 8z East 1991). It has also been compared with non-invasive upper arm measurements during prolonged exercise and appears to function well (Jones et al 1992). However, during more intense exercise the pressure gradient from central to peripheral arteries may increase, and the blood pressure results observed during KE should be interpreted with caution.…”

Section: Methodsmentioning

confidence: 99%

Variable effects of β‐adrenoceptor blockade on muscle blood flow during exercise

Gullestad

Hallén

Sejersted

1993

Acta Physiologica Scandinavica

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The role of beta-adrenoceptors in exercise-induced muscle hyperaemia was investigated. Exercise was performed with a small and a large muscle mass: knee extension (KE) and bicycle exercise (BE). Seven healthy subjects performed light and maximal KE and eight subjects performed stepwise dynamic BE to exhaustion before and after acute i.v. administration of propranolol (0.15 mg kg-1). Leg blood flow was measured by a bolus dye dilution technique. During KE at low and high power leg blood flow was reduced by 8.7 and 10.5% after propranolol was administered, mean arterial blood pressure (MAP) was reduced at low, but not at high power resulting in increased leg vascular resistance (LVR) during high intensity. During BE propranolol reduced leg blood flow and increased LVR at low power, but not at high power. At high BE intensity LVR did not change with increasing power and was slightly decreased after propranolol was administered. In this situation oxygen uptake was close to maximum and the concentration of catecholamines was 3-5 times higher compared with KE. There was no significant effect of propranolol on lactate release or arterial-femoral venous (a-fv) differences for adrenaline or noradrenaline. We conclude that beta-adrenoceptors modulate local vasodilation in skeletal muscles during exercise independently of local muscle energy demand, but that the effect is highly dependent on active muscle mass since alpha-adrenergic activity during maximal BE seemed to disguise any effect of propranolol on LVR.

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Section: Methodsmentioning

confidence: 99%

Variable effects of β‐adrenoceptor blockade on muscle blood flow during exercise

Gullestad

Hallén

Sejersted

1993

Acta Physiologica Scandinavica

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“…One notable supplier of digital artery photo-plethysmography equipment is TNO Biomedical Instrumentation 4 , who refers to the desktop version of their device as the 'TNO Finometer'. The Finometer, Finapres (the Finometer's predecessor) and the Portapres have been shown to measure changes in BP with an accuracy, sensitivity and reproducibility similar to standard invasive techniques (Elvan-Taspinar et al 2003, Hirschl et al 1996, Imholz et al 1991, Jones et al 1992, Kermode et al 1989, Novak et al 1994, Parati et al 1989, Aitken et al 1991, Hartmann and Bassenge 1989, Idema et al 1989, Stokes et al 1991.…”

Section: Introductionmentioning

confidence: 99%

Development and evaluation of new blood pressure and heart rate signal analysis techniques to assess orthostatic hypotension and its subtypes

Deegan¹,

O’Connor²,

Lyons³

et al. 2007

Physiol. Meas.

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Orthostatic hypotension (OH) is a clinical condition, which frequently results in symptoms such as syncope, dizziness during standing, weakness, blurred vision and fatigue. It is defined as a sustained drop in blood pressure exceeding 20 mmHg systolic or 10 mmHg diastolic occurring within 3 min of assuming upright posture, and is a common causal factor for falls in the elderly. Since 1986, tilt-table testing has become widely used in the diagnosis of OH. The Finometer provides non-invasive monitoring of haemodynamic changes during tilt-table testing. In this study, new algorithms for parameter extraction from Finometer data were developed, with specific reference to the diagnosis of OH. Algorithms were developed to assess the rates of change of haemodynamic variables in response to head-up tilt testing, a previously unexamined aspect of tilt-table testing. These algorithms were applied to the Finometer measurements of 20 patients, who underwent tilt-table testing in the Mid-Western Regional Hospital, Limerick. The data extraction algorithms were shown to accurately record changes in haemodynamic variables for further analysis. It was also demonstrated that the rate of change of blood pressure during the head-up tilt-table testing could have prognostic significance for OH.

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Spontaneous Low Frequency Oscillations of Cerebral Hemodynamics and Metabolism in Human Adults

et al. 2000

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The upgraded Finapres 2300e

Abstract: Summary Measurements from the upgraded

Cited by 28 publications

References 15 publications

Variable effects of β‐adrenoceptor blockade on muscle blood flow during exercise

Variable effects of β‐adrenoceptor blockade on muscle blood flow during exercise

Development and evaluation of new blood pressure and heart rate signal analysis techniques to assess orthostatic hypotension and its subtypes

Spontaneous Low Frequency Oscillations of Cerebral Hemodynamics and Metabolism in Human Adults

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