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@article{Hernandez-Silveira:2015:10.1136/bmjopen-2014-006606,
author = {Hernandez-Silveira, M and Ahmed, K and Ang, SS and Zandari, F and Mehta, T and Weir, R and Burdett, A and Toumazou, C and Brett, SJ},
doi = {10.1136/bmjopen-2014-006606},
journal = {BMJ Open},
pages = {e006606--e006606},
title = {Assessment of the feasibility of an ultra-low power, wireless digital patch for the continuous ambulatory monitoring of vital signs.},
url = {http://dx.doi.org/10.1136/bmjopen-2014-006606},
volume = {5},
year = {2015}
}

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TY - JOUR
AB - BACKGROUND AND OBJECTIVES: Vital signs are usually recorded at 4-8h intervals in hospital patients, and deterioration between measurements can have serious consequences. The primary study objective was to assess agreement between a new ultra-low power, wireless and wearable surveillance system for continuous ambulatory monitoring of vital signs and a widely used clinical vital signs monitor. The secondary objective was to examine the system's ability to automatically identify and reject invalid physiological data. SETTING: Single hospital centre. PARTICIPANTS: Heart and respiratory rate were recorded over 2h in 20 patients undergoing elective surgery and a second group of 41 patients with comorbid conditions, in the general ward. OUTCOME MEASURES: Primary outcome measures were limits of agreement and bias. The secondary outcome measure was proportion of data rejected. RESULTS: The digital patch provided reliable heart rate values in the majority of patients (about 80%) with normal sinus rhythm, and in the presence of abnormal ECG recordings (excluding aperiodic arrhythmias such as atrial fibrillation). The mean difference between systems was less than ±1bpm in all patient groups studied. Although respiratory data were more frequently rejected as invalid because of the high sensitivity of impedance pneumography to motion artefacts, valid rates were reported for 50% of recordings with a mean difference of less than ±1brpm compared with the bedside monitor. Correlation between systems was statistically significant (p<0.0001) for heart and respiratory rate, apart from respiratory rate in patients with atrial fibrillation (p=0.02). CONCLUSIONS: Overall agreement between digital patch and clinical monitor was satisfactory, as was the efficacy of the system for automatic rejection of invalid data. Wireless monitoring technologies, such as the one tested, may offer clinical value when implemented as part of wider hospital systems that integrate and supp
AU - Hernandez-Silveira,M
AU - Ahmed,K
AU - Ang,SS
AU - Zandari,F
AU - Mehta,T
AU - Weir,R
AU - Burdett,A
AU - Toumazou,C
AU - Brett,SJ
DO - 10.1136/bmjopen-2014-006606
EP - 006606
PY - 2015///
SN - 2044-6055
SP - 006606
TI - Assessment of the feasibility of an ultra-low power, wireless digital patch for the continuous ambulatory monitoring of vital signs.
T2 - BMJ Open
UR - http://dx.doi.org/10.1136/bmjopen-2014-006606
UR - http://hdl.handle.net/10044/1/23332
VL - 5
ER -

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