How It Works2018-09-17T22:35:00+00:00

How IT WOrks

The ViCardio® solution uses the completely novel, Tarilian, micro-motion opto-electronic sensor.

This unique Tarilian  sensor allows the device to accurately measure the changes in force and flow that occur from the pulse wave that propogates through the arterial tree

As this pulse wave expands and contracts, these forces are relayed through a small button interface to Tarilian Laser Technologies’ proprietary optical waveguide), and the LED light that is transmitted across this waveguide becomes deflected and translates the rich signal from your blood pressure wave into an electrical signal.  This proprietary technique called is optical power modulation. This can then be plotted as a real time graph of your direct and accurate continuous blood pressure (the Arteriogram), and also record the actual systolic and diastolic pressure values with every single beat of the heart.

This technique is unique in allowing a user to record their blood pressure and all the rich data held within the full, beat to beat, pressure graph in a real life situation. This data has only previously been available through the use of invasive arterial lines that are expensive to put in place and manage and pose a risk of infection, and as such have been reserved for patients recovering on the intensive care unit.

Frequently asked questions

Many people have purchased devices from cuff-based products to wearable monitors that promise to help them measure their blood pressure, but soon find them to be next to useless.
The ViCardio® solution is a medical grade device and as such will only be put on sale and delivered when it has the full regulatory certification to be sold as a class 2A medical device.
To achieve this certification, the ViCardio® solution has undergone a level of clinical testing that far exceeds the minimum requirements required by the regulatory authorities. Many products are simple tested against other approved cuff based devices. We are so confident regarding the power and fidelity of the ViCardio® solution and Tarilian sensor that we have successfully completed the highest level of clinical study so that we can validate, beyond and doubt, our claims and the devices accuracy. This is a globally recognised international standards organization (ISO) standard of clinical trial where the device has been compared first to traditional cuff-based devices, but then in a second and recent study to the gold standard, the Invasive Intra-Arterial line. This is the device that is reserved for those patients who undergo major heart procedures or need the closest and most accurate standard of monitoring in Intensive Care.
This trial has successfully concluded and anticipated to be published in an independent and world renowned medical journal following a peer review process where the full methodology and results and analysis of the trial will be scrutinised by independent world experts on blood pressure.

No, the ViCardio® solution does not use these technologies. Photoplethysmography (PPG) and Pulse Transit Time (PTT) are technologies that go back as far as 1939. They have proven useful for estimating heart rate, and have also been used in some complex research tools for estimating Blood Pressure. However, despite many years of research and investment, they have failed to offer a reliable method of measuring blood pressure in the community. ViCardio relies on a completely novel sensing technology that does not attempt to use a reflective light source or estimate pressure based on electrical signal from the Heart. In fact, it is very simple, ViCardio measures skin surface motions resulting from various underlying force vectors associated with blood flow and blood pressure within the blood vessel.

The Tarilian sensing technology in the ViCardio® solution directly captures information from the skin surface indicative of the underlying blood flow and force vectors and submits that information to a proprietary algorithm that generates a continuous measure of blood pressure. Unlike other technologies, this Tarilian technique of capturing blood flow and force vectors and performing proprietary processing on that information in and of itself produces an accurate measure of blood pressure without the need for calibration to a separate measurement system.
PPG or PTT require frequent and often individual calibration as they rely on techniques which estimate pressure and these estimates are based or affected by factors such skin pigmentation, tissue thickness, arm length etc.

Beat to Beat measurement of blood pressure is an important advance for a number of reasons:
Firstly, blood pressure is a constantly changing measurement. Traditional devices, which blow up around your arm or wrist take a single reading of pressure following the uncomfortable stimulus of having had the cuff blow up and occlude the artery. For this reason alone, 40% of reading in a doctor’s clinic are thought to be inaccurate. The ability for ViCardio to take approximately as an example 36 separate readings in a 30 second cycle means that you eliminate both the changes that occur due to the unnatural discomfort caused by the cuff, and you get a picture of the average blood pressure over that period, rather than at a single point in time.
Secondly, it is well known that blood pressure variability (that is, the changes in blood pressure that occur at different times during each day, and also within even a 30 second window of measurement) is highly significant as a marker to estimate the effect of blood pressure on the organs of the body. Longer interval measurement of direct continuous blocks of blood pressure lead to a much better assessment of blood pressure variability in individuals. Equally important is its use as a predictor of the risk of developing certain diseases (e.g. Diabetes, Dementia, Sepsis) as well as the course and outcome of many diseases. Blood pressure variability is an evolving area of specialist interest and the data that the ViCardio® solution can gather will help and allow the use of this information to understand and treat an individual’s risk, and also build better predictive models and improve the understanding of this phenomena across patient populations.

No, the Tarilian sensor used in the ViCardio® solution is completely non-invasive. No light or energy enters the body at all. The LED light source is projected across the sensor and the path of this light is changed by the pressure from the small movements caused as the radial artery, and the tissues around it, expand and contract during each cyclical heart beat. This makes the ViCardio solution 100% non-invasive.