centre for doctoral training in healthcare innovation institute of biomedical engineering department...
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Centre for Doctoral Training in Healthcare InnovationInstitute of Biomedical EngineeringDepartment of Engineering ScienceUniversity of Oxford
Current issues in healthcare
Blood Pressure Monitoring
April 20, 2023
The burden of hypertension
Hypertension is one of the leading causes of death and disability in developing countries
Increases the risk of coronary arteries damage, heart attack, stroke, among others
By the year of 2025, 29% of the adult population will suffer from hypertension*
It is an indicator of other conditions such as pre-eclampsia
Current issues in healthcare
*Kearney P, Whelton M, Reynolds K, Muntner P, Whelton P, He J. Global burden of hypertension: analysis of worldwide data. The Lancet, 2005. 365(9455): p. 217-223
Hypertension is defined as BP> 140/90 mmHg in previously normotensive OR
Rise in BP of > 30/15 mmHg compared to BP at baseline
April 20, 2023
Trends in Maternal Mortality: 1990 to 2008, WHO 2010
Pre-eclampsia Foudation website: http://www.preeclampsia.org/
Different methods are available to measure the BP
Current non-invasive BP systems
Current issues in healthcare
Electronic Devices
Oscillometric Method
Korotkoff Sounds
DiastolicBP
Traditional Method
April 20, 2023
Heart Rate
SystolicBP
Different methods are available to measure the BP
Current issues in healthcare
Electronic Devices
Oscillometric Method
Korotkoff Sounds
DiastolicBP
Traditional Method
THE PROBLEM?
April 20, 2023
Heart Rate
SystolicBP
Current non-invasive BP systems
Inaccuracy of the oscillometric method
Current issues in healthcare April 20, 2023
The problem
Inaccuracy of the oscillometric method
Current issues in healthcare April 20, 2023
The problem
Inaccuracy of the oscillometric method
Current issues in healthcare April 20, 2023
The problem
? ?
MAP
SBP
DBP
EWH-Oxford developed a low-cost, simple and easy-to-use device with mobile phone connection. However… It uses the oscillometric method
Can we improve the blood pressure measurement? (accuracy of BP readings)
Can we use information from other sensors? (ECG, PPG, etc …)
What can we do to improve this?
Current issues in healthcare April 20, 2023
BP Group website: http://code.google.com/p/ewh-bp-project/