Step 1
Light is constantly transferring inside the Darma fiber optic sensor.
Step 2
The minor variations of a user’s heartbeat and respiration will change the transmission of the light.
Step 3
Using advanced algorithms, the changes in the light transmission are converted into vital signs and displayed on different devices.
1.What is BCG?
Ballistocardiograph (BCG) is a non-invasive measurement of the mechanical movement of the body caused by the blood ejected from the heart. It is a technique for producing a graphical representation of the ejection of blood into the vessels with each heart beat.
1.What can BCG do?
Studies have shown that BCG can be used to detect heart rate, heart rate variability (HRV), cardiac contractility, and cardiac output changes. BCG also has the potential practical application to detect heart disease, heart failure, and other heart problems.
1.What is HRV?
Heart rate variability (HRV) is the physiological phenomenon of variation in the time interval between heartbeats. It is measured by the variation in the beat-to-beat interval.
A higher HRV value typically means you are healthier and in better aerobic shape. As shown in the graph to the left, two adults with the same heart rate of 60, the HRV value of user B is higher than that of user A, meaning that user B is healthier.
2.How is HRV measured?
HRV can be measured by calculating the cardiac beat-to-beat intervals of ECG/EKG, BCG, and PPG. By recording the intervals and calculating the variations, HVR is obtained.
Electrocardiogram (ECG/EKG) is the process of recording the electrical activity of the heartbeat over a period of time using electrodes placed on the skin. Photoplethysmogram (PPG) is a simple optical technique used to detect volumetric changes in blood in the peripheral circulation.
3.What can HRV do?
By analyzing the differences when the heart beats each time and having timely access to health information, HRV can be used for stress recovery. Studies have shown that heart rate variability can detect coronary heart disease, hypertension, and heart failure. In particular, the prognosis of cardiovascular disease will continue and should be monitored. Controlling the changes in the heart may prevent the recurrence of deterioration.
As shown in the picture to the left, by collecting the JJ interval data in the BCG graph (or the RR interval in the ECG/EKG graph or the PP interval in the PPG graph), the Lorenz plot is obtained. Darma can roughly judge whether a person has a sinus heart rate or supraventricular and ventricular arrhythmias by the Lorenz plot.
Why Choose Darma Sensor?
Medical-Level Accuracy-- Darma fiber optic sensors use optical principles to detect the minor vibrations in the human body. With the help of advanced algorithms, we easily achieve a medical level of accuracy.
High Weight Capacity-- Similar products in the market have a very limited weight capacity. Darma’s sensors, however, have almost no weight limits.
Zero Interference-- Similar sensors, such as accelerometers, only detect one person at a time, and the signals interfere with each other when two accelerometers are present. Since Darma sensors use the principle of optics, zero interference occurs, even if two sensors are used in the same bed.
Longevity-- The life span of similar sensors are very short, but Darma's sensors can be used for more than ten years.