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The William Harvey Research Institute - Faculty of Medicine and Dentistry

Observational BP

Trial objective: To advance the development and accuracy of the Lifelight® app for the measurement of vital signs, therefore developing a non-invasive and easy-to-perform means of measuring vital signs which can be implemented across a wide range of settings, both within hospitals and out in the community.
Disease area: High blood pressure
Status: Open to Recruitment
CI/PI: Dr Manish Saxena
Sponsor: xim Limited
Funder: xim Limited

Study summary

Vital signs are usually measured during a medical assessment and are important markers of how an illness may be affecting someone. Vital signs include blood pressure, heart rate, respiratory rate, and oxygen saturations. The way we take these measurements at the moment involves lots of different pieces of equipment; it can be uncomfortable for patients and can sometimes take a long time to get the necessary measurements. There may also be patients who could benefit from monitoring at home, but the equipment can be cumbersome and expensive.

A company called xim Limited is developing a computer app called Lifelight® that can be used on any device with a camera. It is hoped that a simple video of your face can be used to measure your vital signs from very small changes in skin colour which means it doesn’t even need to touch you to take measurements.

This study builds on two successful VISION studies that have already been done at Queen Alexandra Hospital in Portsmouth. In order to make it more accurate, the app needs to see more information particularly different blood pressure and oxygen saturation measurements.

Sample size and duration

5000 / 12 months


Armida Balawon – 020 7882 5669 /
Francis Galera – 020 7882 5705 /
Benildo Quiros Jr – 020 7882 5667 /                              


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