How long has ThermoVu™ been on the market?
ThermoVu™ has been in the European and Asian markets for three months. It was developed to combat COVID-19 using the latest sensor and real-time embedded technology. The countries that were hit by the pandemic early have adopted ThermoVu™ technology with great success. It is a new as well as a tried and true solution.
There are asymptomatic people who do not have a fever. Why do we still need to check their temperature?
Yes, there are asymptomatic patients, but among all the symptoms of the people with a coronavirus infection, fever has the highest percentage – 99%! Here is some more info regarding the fever symptom for COVID-19.
Initial COVID-19 symptoms vary, but the Centers for Disease Control and Prevention says most people with a coronavirus infection will experience:
- Fever (83-99 percent).
- Cough (59-82 percent).
- Fatigue (44-70 percent).
- Anorexia: loss of appetite (40-84 percent).
- Shortness of breath (31-40 percent).
- Sputum production (28-33 percent).
- Muscle aches (11-35 percent).
Here is another study with the Fever at 99%:
Researchers found that the most common symptoms among people who were hospitalized with COVID-19 include:
- Fever: 99%
- A dry cough: 59%
- Loss of appetite: 40%
- Body aches: 35%
- Shortness of breath: 31%
- Mucus or phlegm: 27%
What is the difference between accuracy ((±0.5°F) and precision ((±0.2°F)? What is FDA’s requirement?
Below is the FDA’s requirement regarding accuracy and precision. As you can see, ThermoVu’s™ ±0.5°F accuracy and ±0.2°F precision exceed FDA recommendations, which is ±0.9°F accuracy, ±0.36°F precision.
From FDA, https://www.fda.gov/media/137079/download:
“The laboratory temperature accuracy of a screening telethermographic system, including the measurement uncertainty, is less than or equal to ±0.5°C (±0.9°F) over the temperature range of at least 34-39°C (93.2-102.2°F);
Both stability and drift are less than 0.2°C (0.36°F) within a timeframe specified by the manufacturer;”
The measurement accuracy (“measurement uncertainty” in FDA’s document) describes the difference between the measured value and the actual value. The precision (“stability and drift” in FDA’s document) describes the variation you see when you measure the same part repeatedly with the same device. For example, assuming an instrument’s accuracy is ±0.5°F, and the precision is ±0.2°F, and an object’s actual temperature is 98°F. The reading of the instrument will be between 97.5°F and 98.5°F because the accuracy is ±0.5°F. If you use the same instrument to measure the same object multiple times, the difference between each reading is within 0.2°F, because the precision is ±0.2°F.
What should the high-temperature threshold be? Why is ThermoVu’s™ reading lower than an oral or tympanic thermometer?
We recommend setting the high-temperature threshold to 99.6°F for ThermoVu™. The temperature can be taken using different methods – mouth (oral), ear (tympanic), anus (rectal), wrist/armpit/forehead (axillary). The temperature readings vary depending on which one you use. Below is a chart showing the relationship between different temperature readings.