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Timothy Bonnici
Researcher at University of Oxford
Publications - 29
Citations - 1306
Timothy Bonnici is an academic researcher from University of Oxford. The author has contributed to research in topics: Early warning score & Photoplethysmogram. The author has an hindex of 12, co-authored 26 publications receiving 877 citations. Previous affiliations of Timothy Bonnici include King's College London & John Radcliffe Hospital.
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Journal ArticleDOI
Signal-Quality Indices for the Electrocardiogram and Photoplethysmogram: Derivation and Applications to Wireless Monitoring
Christina Orphanidou,Timothy Bonnici,Peter Charlton,David A. Clifton,David Vallance,Lionel Tarassenko +5 more
TL;DR: A signal quality index (SQI) is presented, intended to assess whether reliable heart rates can be obtained from electrocardiogram and photoplethysmogram signals collected using wearable sensors and how an SQI can be used to reduce the error in the estimation of respiratory rate (RR) from the PPG.
Journal ArticleDOI
An assessment of algorithms to estimate respiratory rate from the electrocardiogram and photoplethysmogram
Peter Charlton,Timothy Bonnici,Timothy Bonnici,Lionel Tarassenko,David A. Clifton,Richard Beale,Peter J. Watkinson +6 more
TL;DR: The primary aim was to determine how closely algorithms agreed with a gold standard RR measure when operating under ideal conditions, and to provide a toolbox of algorithms and data to allow future researchers to conduct reproducible comparisons of algorithms.
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Breathing Rate Estimation From the Electrocardiogram and Photoplethysmogram: A Review
Peter Charlton,Drew A. Birrenkott,Timothy Bonnici,Marco A. F. Pimentel,Alistair E. W. Johnson,Jordi Alastruey,Lionel Tarassenko,Peter J. Watkinson,Richard Beale,David A. Clifton +9 more
TL;DR: A review of the literature on BR estimation from the ECG and PPG signals is presented, and the most pressing directions for future research are outlined, including the steps required to use BR algorithms in wearable sensors, remote video monitoring, and clinical practice.
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Early warning scores for detecting deterioration in adult hospital patients: systematic review and critical appraisal of methodology
Stephen Gerry,Timothy Bonnici,Jacqueline Birks,Shona Kirtley,Pradeep S. Virdee,Peter J. Watkinson,Gary S. Collins +6 more
TL;DR: Early warning scores are widely used prediction models that are often mandated in daily clinical practice to identify early clinical deterioration in hospital patients, however, many early warning scores in clinical use were found to have methodological weaknesses.
Journal ArticleDOI
Extraction of respiratory signals from the electrocardiogram and photoplethysmogram: technical and physiological determinants.
Peter Charlton,Timothy Bonnici,Timothy Bonnici,Lionel Tarassenko,Jordi Alastruey,David A. Clifton,Richard Beale,Peter J. Watkinson +7 more
TL;DR: Recommendations based on the results are provided regarding device designs for BR estimation, and clinical applications.