Search Results - "CHAN, Gregory S. H"

Contribution of arterial Windkessel in low-frequency cerebral hemodynamics during transient changes in blood pressure by CHAN, Gregory S. H, AINSLIE, Philip N, WILLIE, Chris K, TAYLOR, Chloe E, ATKINSON, Greg, JONES, Helen, LOVELL, Nigel H, TZENG, Yu-Chieh

“…The Windkessel properties of the vasculature are known to play a significant role in buffering arterial pulsations, but their potential importance in dampening…”
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Peripheral photoplethysmography variability analysis of sepsis patients by Middleton, Paul M., Tang, Collin H. H., Chan, Gregory S. H., Bishop, Sarah, Savkin, Andrey V., Lovell, Nigel H.

“…Sepsis is associated with impairment in autonomic regulatory function. This work investigates the application of heart rate and photoplethysmogram (PPG)…”
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Fingertip photoplethysmographic waveform variability and systemic vascular resistance in intensive care unit patients by Middleton, Paul M., Chan, Gregory S. H., Steel, Elizabeth, Malouf, Philip, Critoph, Christopher, Flynn, Gordon, O’Lone, Emma, Celler, Branko G., Lovell, Nigel H.

“…Low frequency variability in the fingertip photoplethysmogram (PPG) waveform has been utilized for inferring sympathetic vascular control, but its relationship…”
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Identification and Control for Automated Regulation of Hemodynamic Variables During Hemodialysis by Javed, Faizan, Savkin, Andrey V., Chan, Gregory S. H., Mackie, James D., Lovell, Nigel H.

“…This paper proposes a novel model-based control methodology for a computer-controlled hemodialysis system, designed to maintain the hemodynamic stability of…”
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Detrended fluctuation analysis of blood pressure in preterm infants with intraventricular hemorrhage by Zhang, Ying, Chan, Gregory S. H., Tracy, Mark B., Hinder, Murray, Savkin, Andrey V., Lovell, Nigel H.

“…Very preterm infants are at high risk of death and serious permanent brain damage, as occurs with intraventricular hemorrhage (IVH). Detrended fluctuation…”
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Model predictive control of relative blood volume and heart rate during hemodialysis by Javed, Faizan, Savkin, Andrey V, Chan, Gregory S. H, Middleton, Paul M, Malouf, Philip, Steel, Elizabeth, Mackie, James, Cheng, Teddy M

“…To maintain the hemodynamic stability of patient undergoing hemodialysis, this article proposes a novel model-based control methodology to regulate the changes…”
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Determinants of human cerebral pressure–flow velocity relationships: new insights from vascular modelling and Ca2+ channel blockade by Tzeng, Yu‐Chieh, Chan, Gregory S. H., Willie, Christopher K., Ainslie, Philip N.

“…Non‐technical summary  Brain function is critically dependent on the regulation of cerebral blood flow (CBF) by cerebral blood vessels. We show that a…”
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A cardiovascular mathematical model of graded head-up tilt by Lim, Einly, Chan, Gregory S H, Dokos, Socrates, Ng, Siew C, Latif, Lydia A, Vandenberghe, Stijn, Karunanithi, Mohan, Lovell, Nigel H

“…A lumped parameter model of the cardiovascular system has been developed and optimized using experimental data obtained from 13 healthy subjects during graded…”
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Spontaneous fluctuations in the peripheral photoplethysmographic waveform: roles of arterial pressure and muscle sympathetic nerve activity by Chan, Gregory S H, Fazalbhoy, Azharuddin, Birznieks, Ingvars, Macefield, Vaughan G, Middleton, Paul M, Lovell, Nigel H

“…Assessment of spontaneous slow waves in the peripheral blood volume using the photoplethysmogram (PPG) has shown potential clinical value, but the…”
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Frequency spectrum analysis of finger photoplethysmographic waveform variability during haemodialysis by Javed, Faizan, Middleton, Paul M, Malouf, Philip, Chan, Gregory S H, Savkin, Andrey V, Lovell, Nigel H, Steel, Elizabeth, Mackie, James

“…This study investigates the peripheral circulatory and autonomic response to volume withdrawal in haemodialysis based on spectral analysis of…”
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Change in pulse transit time and pre-ejection period during head-up tilt-induced progressive central hypovolaemia by CHAN, Gregory S. H, MIDDIETON, Paul M, CELLER, Branko G, LU WANG, LOVELL, Nigel H

“…Traditional vital signs such as heart rate (HR) and blood pressure (BP) are often regarded as insensitive markers of mild to moderate blood loss. The present…”
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Spectral Analysis of Finger Photoplethysmographic Waveform Variability in a Model of Mild to Moderate Haemorrhage by Middleton, Paul M., Chan, Gregory S. H., O’Lone, Emma, Steel, Elizabeth, Carroll, Rebecca, Celler, Branko G., Lovell, Nigel H.

“…Objective Slow fluctuations in cardiovascular signals such as heart rate variability (HRV) are believed to carry important clinical information. This study…”
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Changes in left ventricular ejection time and pulse transit time derived from finger photoplethysmogram and electrocardiogram during moderate haemorrhage by Middleton, Paul M., Chan, Gregory S.H., O'Lone, Emma, Steel, Elizabeth, Carroll, Rebecca, Celler, Branko G., Lovell, Nigel H.

“…Summary Objectives:  Early identification of haemorrhage is difficult when a bleeding site is not apparent. This study explored the potential use of the finger…”
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Unraveling the human cerebral circulation: insights from cerebral blood pressure and flow recordings by Tzeng, Yu-Chieh, Chan, Gregory S H

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Non-invasive classification of severe sepsis and systemic inflammatory response syndrome using a nonlinear support vector machine: a preliminary study by Tang, Collin H H, Middleton, Paul M, Savkin, Andrey V, Chan, Gregory S H, Bishop, Sarah, Lovell, Nigel H

“…Sepsis has been defined as the systemic response to infection in critically ill patients, with severe sepsis and septic shock representing increasingly severe…”
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Recent advances in the monitoring and control of haemodynamic variables during haemodialysis: a review by Javed, Faizan, Savkin, Andrey V, Chan, Gregory S H, Mackie, James D, Lovell, Nigel H

“…The human body possesses a unique set of organs that are responsible for providing homeostatic balance to the body's fluids. Of these, the kidneys regulate…”
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Identification of high-risk acute coronary syndromes by spectral analysis of ear photoplethysmographic waveform variability by Middleton, Paul M, Chan, Gregory S H, Marr, Sebastian, Celler, Branko G, Lovell, Nigel H

“…There is a need for robust techniques for early and accurate diagnosis of acute coronary syndromes (ACSs), to avoid inappropriate discharge of patients. This…”
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Spectral analysis of systemic and cerebral cardiovascular variabilities in preterm infants: relationship with clinical risk index for babies (CRIB) by Zhang, Ying, Chan, Gregory S H, Tracy, Mark B, Lee, Qim Y, Hinder, Murray, Savkin, Andrey V, Lovell, Nigel H

“…Frequency spectrum analysis of circulatory signals has been proposed as a potential method for clinical risk assessment of preterm infants by previous studies…”
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Multivariate classification of systemic vascular resistance using photoplethysmography by Lee, Qim Y, Chan, Gregory S H, Redmond, Stephen J, Middleton, Paul M, Steel, Elizabeth, Malouf, Philip, Critoph, Christopher, Flynn, Gordon, O'Lone, Emma, Lovell, Nigel H

“…Systemic vascular resistance (SVR) classification is useful for the diagnosis and prognosis of critical pathophysiological conditions, with the ability to…”
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Automatic detection of left ventricular ejection time from a finger photoplethysmographic pulse oximetry waveform: comparison with Doppler aortic measurement by Chan, Gregory S H, Middleton, Paul M, Celler, Branko G, Wang, Lu, Lovell, Nigel H

“…Left ventricular ejection time (LVET) is a useful measure of ventricular performance and preload. The present study explores a novel method of continuous LVET…”
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