Solution2020-06-07T14:14:09+01:00

World’s first
Clinical Observations
in 40 Seconds

100% Contactless from a tablet or smartphone camera

Contact Us

World’s first
Clinical Observations
in 40 Seconds

100% Contactless from a tablet or smartphone camera

Contact Us
Lifelight® First

What is Lifelight?

Supported by NHS England, Lifelight is a life-saving digital healthcare platform that currently measures blood pressure, heart and breathing rate simply by a patient looking into a tablet or a smartphone’s built-in camera for 40 seconds.

Lifelight works by detecting colour changes of the skin, not noticeable by the human eye, but detectable by a smartphone or tablet camera.  With every heartbeat our face blushes, which is enough for a device camera to take key observations, including blood pressure, heart and breathing rates.  These vital measurements can be taken with zero contact, the patient simply looks at the device screen.

Our ground-breaking solution, Lifelight First, available to clinicians today, has the potential to deliver benefits across a wide range of use cases.  Our starting point is in primary and secondary care, where pressure on workload and staff shortages are critical. Lifelight reduces workload pressure by:

  • Improving throughput of consultations.  Blood Pressure measurements are taken in 31% of England’s 372 million annual GP appointments [1].
    Reducing the time taken for these could free up more than 4 million hours of GP and Practice Nurse time.

  • Reducing care home and home visits.  The average surgery makes 27 home and 13 care home visits weekly, which consumes considerable clinical time, whereas Lifelight can be provided to frequent service users to make better informed remote consultations.

  • Easier capture of vital signs across all care settings leading to improved detection of sepsis and other forms of health deterioration.

As well as staff productivity, the contactless nature of Lifelight has been reported to improve patient experience, and reduce anxiety as no cuff is needed. This may also help to reduce ‘white coat’ syndrome which affects over 15%-30% of the population [2] and leads to £10.5 million of unnecessary costs pa [3].

“Lifelight is estimated to save over £300m a year for NHS reinvestment, if used in GP surgeries alone.”

JB Medical – Independent NHS Healthcare Economist – click to view report

Lifelight First is intended for spot measurement of vital signs in clinical settings.   Our next solution (in testing), Lifelight Home will allow patients to measure their own vital signs at home using their own smartphone.   Lifelight Home overcomes the barriers to regular vital sign monitoring by people with chronic diseases by measuring the 5 major vital signs (heart rate, respiratory rate, blood pressure, oxygen saturation and atrial fibrillation  – coming soon) using only the camera of any standard smart device (smartphone, tablet, laptop).  All that is required is the user’s face to be in line of sight of the camera for 40 seconds, meaning they can be surfing the net, contributing to social media, etc. while having their vital signs measured.

[1] “When and how do GPs record vital signs in children with acute infections? A cross-sectional study” – Blacklock et al – 2012
[2] “Use and interpretation of ambulatory blood pressure monitoring: recommendations of the British Hypertension Society” – 2000
[3] “Chronic Kidney Disease and Hypertension” – Weir and Lerma – p113 – 2015

What is Lifelight?

Supported by NHS England, Lifelight is a life-saving digital healthcare platform that currently measures blood pressure, heart and breathing rate simply by a patient looking into a tablet or a smartphone’s built-in camera for 40 seconds.

Lifelight works by detecting colour changes of the skin, not noticeable by the human eye, but detectable by a smartphone or tablet camera.  With every heartbeat our face blushes, which is enough for a device camera to take key observations, including blood pressure, heart and breathing rates.  These vital measurements can be taken with zero contact, the patient simply looks at the device screen.  How does Lifelight Work?

Our ground-breaking solution, Lifelight First, available to clinicians today, has the potential to deliver benefits across a wide range of use cases.  Our starting point is in primary and secondary care, where pressure on workload and staff shortages are critical. Lifelight reduces workload pressure by:

  • Improving throughput of consultations.  Blood Pressure measurements are taken in 31% of England’s 372 million annual GP appointments [1].
    Reducing the time taken for these could free up more than 4 million hours of GP and Practice Nurse time.

  • Reducing care home and home visits.  The average surgery makes 27 home and 13 care home visits weekly, which consumes considerable clinical time, whereas Lifelight can be provided to frequent service users to make better informed remote consultations.

  • Easier capture of vital signs across all care settings leading to improved detection of sepsis and other forms of health deterioration.

As well as staff productivity, the contactless nature of Lifelight has been reported to improve patient experience, and reduce anxiety as no cuff is needed. This may also help to reduce ‘white coat’ syndrome which affects over 15%-30% of the population [2] and leads to £10.5 million of unnecessary costs pa [3].See common FAQs…

“Lifelight is estimated to save over £300m a year for NHS reinvestment, if used in GP surgeries alone.”

JB Medical – Independent NHS Healthcare Economist – click to view report

Lifelight First is intended for spot measurement of vital signs in clinical settings.   Our next solution (in testing), Lifelight Home will allow patients to measure their own vital signs at home using their own smartphone.   Lifelight Home overcomes the barriers to regular vital sign monitoring by people with chronic diseases by measuring the 5 major vital signs (heart rate, respiratory rate, blood pressure, oxygen saturation and atrial fibrillation  – coming soon) using only the camera of any standard smart device (smartphone, tablet, laptop).  All that is required is the user’s face to be in line of sight of the camera for 40 seconds, meaning they can be surfing the net, contributing to social media, etc. while having their vital signs measured.

[1] “When and how do GPs record vital signs in children with acute infections? A cross-sectional study” – Blacklock et al – 2012
[2] “Use and interpretation of ambulatory blood pressure monitoring: recommendations of the British Hypertension Society” – 2000
[3] “Chronic Kidney Disease and Hypertension” – Weir and Lerma – p113 – 2015

FAQs – Common Questions

What is PPG & rPPG?2019-11-10T17:16:51+00:00

Photoplethysmography (PPG) is a non-invasive optical technique that detects blood volume changes in the microvascular tissue bed beneath the skin[1].

Widely used in pulse oximeters to monitor a subject’s heartrate and peripheral oxygen saturation (SpO2), PPG relies on the fact that arterial blood displays different optical absorption with respect to other tissue components in certain light wavelengths[2]. By emitting light through the skin layers and measuring the amount of light propagating in the tissue, we can obtain a PPG signal that reflects blood volume changes over time. The PPG-waveform can further be used to calculate physiological variables such as heartrate, respiratory rate, SpO2 and blood pressure. As well as use in medical applications, contact-based PPG has been adapted for use in some consumer-oriented wearable devices.

Remote PPG (rPPG) is an evolution of PPG technology that no longer requires physical contact, relying instead on ambient light being reflected from the skin and captured remotely by a CMOS camera[3][4]. The colour signals captured can then be filtered using AI techniques such as Independent Component Analysis (ICA) [5].

Lifelight’s technology is a practical application of rPPG using ubiquitous mobile phones and tablets for static non-contact health monitoring of patients/consumers, eliminating the need for additional devices.

Sources

[1] Kamal et al., “Skin photoplethysmography–a review,” Computer Methods and Programs in Biomedicine, vol. 28, no. 4, pp. 257–269, 1989
[2] Ugnell and P. A. Oberg, “The time-variable photoplethysmographic signal; dependence of the heart synchronous signal on wavelength and sample volume,” Medical Engineering and Physics, vol. 17, no. 8, pp. 571–578, 1995
[3] Verkruysse et al., “Remote plethysmographic imaging using ambient light,” Opt. Express, vol. 16, no. 26, pp. 21 434–21 445, Dec. 2008
[4] Rasche et al., “Camera-based photoplethysmography in critical care patients,” Clinical hemorheology and microcirculation, vol. 64, no. 1, pp. 77–90, Nov. 2016
[5] Z. Poh et al., “Advancements in noncontact, multi-parameter physiological measurements using a webcam,” Biomedical Engineering, IEEE Trans- actions on, vol. 58, no. 1, pp. 7–11, Jan. 2011.
Why does Lifelight need to know a person’s age and height?2019-10-22T03:09:21+01:00

The patient’s age, height and sex are captured to help the Lifelight First algorithm to accurately calculate systolic and diastolic blood pressure.

It is important to emphasise that although the Lifelight First application captures height age and sex, it is not associated with the patient as there is no other personal identifiable data captured – e.g. name, email address, NHS number, fingerprint, etc.  The device will wipe this information immediately after Lifelight First has sent the RGB stream to the Amazon Web Service (AWS) for processing.

Does make-up limit Lifelight?2019-10-22T02:57:19+01:00

No, in fact during our clinical trials make-up was found to aid the device camera by cancelling out unwanted light on the face.

Does Lifelight work on all skin types?2019-10-22T03:11:23+01:00

Yes, during our clinical trials, Lifelight was found to work on all skin types as dictated by the Fitzpatrick scale.

Is patient data retained by Lifelight?2019-10-22T03:09:53+01:00

It is important to note that Lifelight First has been designed and conceived with security and data protection in mind and all data is anonymised and encrypted both at rest and in transit.

No personally identifiable data is stored within Lifelight First – even when integrated with Electronic Patient Records (EPR) a unique ‘test request ID’ token will be passed from the EPR to Lifelight and used to correctly identify the patient’s reading when it is returned to the EPR.  Data is not retained within the solution, it is deleted as soon as the signal has been sent to Amazon Web Service (AWS).  There are no international transfers of data.

Lifelight First does not have a direct relationship with the data subject and the data subjects have as much control over their data when their clinician or care provider is using Lifelight First as they do in any other situation where their Article 9 data is being handled by their GP or Hospital.

How does Lifelight measure Blood Pressure (BP)?2019-10-22T18:06:47+01:00

Through signal processing the rPPG waveform, we can select the features our algorithm needs to detect blood pressure.

Our large clinical dataset, has allowed us to analyse the waveforms, their shape (morphology) along with further features in the frequency domain.  These are combined with information about the person, including their age, weight and gender and evaluated via a machine learning technique.

Through this mapping process, Lifelight is being trained to measure for systolic and diastolic blood pressure via its live camera signal.

Is Lifelight suitable for paediatric use?2019-11-18T16:32:58+00:00

Lifelight First is intended for spot-check monitoring of adult patients.  The solution is not currently intended in paediatrics, but children of 5 years plus form part of the clinical trial and paediatric use is on our product roadmap.

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