Temporal Artery Thermometer Consumer Information Center Model TAT-2000C

Frequently Asked Questions of Temporal Artery Thermometer Measurement


What does the TemporalScanner™ measure?
With a gentle stroke of the forehead it captures the naturally emitted heat from the skin over the temporal artery, taking 1,000 readings per second, selecting the most accurate. With its patented Arterial Heat Balance system the TemporalScanner measures ambient temperatures, mathematically replaces the small temperature loss from cooling at the skin, and displays an accurate arterial temperature.

Why is it more accurate than ear temperature?
A major reason ear thermometers are considered inaccurate by medical professionals is because the positioning of the probe in the ear canal is inconsistent, thus creating inconsistent readings and frequently missing fevers. The temporal artery thermometer scans the forehead area for the temporal artery and it is almost impossible to miss the artery during a scan. Also, the person whose temperature is being taken does not like something inserted in their ear, making good positioning even more difficult. The gentle scan across the forehead is comfortable and not objectionable. The TemporalScanner has been proven more accurate than ear thermometers by a Harvard Medical School study.

What is arterial temperature?
Arterial temperature is the same temperature as the blood flowing from the heart. It is the best determinate of body temperature.

Normally, how does arterial temperature compare to other methods of temperature?
Arterial temperature is the same temperature as the blood flowing from the heart. It is the best determinate of body temperature.

Is it different when someone is sick?
At times, you can expect larger differences from temperatures taken at other body sites. This is because of two main reasons:

  • Temporal artery temperature changes faster than temperature taken rectally
  • Temporal artery temperature is not affected by the things that cause oral and underarm temperatures to be misleading.

For example, drinking, coughing, talking, or mouth breathing can easily affect oral temperature, and skin blood flow changes with a fever can easily affect axillary temperature.

Why am I getting inconsistent results?
You should normally be getting reproducible results, or results within a few tenths of a degree of each other. However, a few things to know:

  • Multiple temperatures taken over the same area in rapid succession will ultimately cool the area causing differences.
  • If sweating, the temperature on the neck behind the ear lobe becomes the overriding temperature, and since this area is not quite as stable as the temporal artery, it can easily cooled be by the thermometer in taking multiple readings. Remember, the probe of thermometer will be at room temperature, and is about 30 degrees Fahrenheit (17 degrees Celsius) cooler than body temperature.

I heard the thermometer is sensitive to ambient temperature, is it?
Yes, it is sensitive to ambient temperature, which is part of the reason it is so accurate. But, as long as the thermometer is in approximately the same ambient temperature as the individual whose temperature is being taken, you don't have to be concerned.

Doesn't ambient temperature affect the temperature of the skin on the forehead?
Yes, ambient temperature affects the skin temperature, and so the thermometer automatically measures the ambient temperature at the very same time it is measuring the temperature over the temporal artery. It then can calculate any heat loss (in a normal or cold room) or gain (in a hot room), and instantly computes an accurate body temperature. Exergen patented this method, which is called the Arterial Heat Balance Method, and the result, proven by clinical studies, is a non-invasive body temperature as accurate as even the most invasive temperature measurement methods.

What else should I know?

  • Measure only the side of the head that is exposed. Any covering, hair, hat, etc. will prevent the heat from dissipating, and would cause the reading to be falsely high. This also applies if one side of the head is into a pillow.
  • Slide the thermometer in a reasonably straight line across the forehead, midway between the eyebrows and the upper hairline, and not down the side of the face. Midway on the forehead area, the temporal artery is less than 2 millimeters below the skin surface, but down the side of the face, it is much deeper and less accurately measured.
  • You should also know you have purchased the gentlest and most accurate method of temperature assessment in the world.

Where can I purchase a TemporalScanner?
They are available at Wal-Mart, Babies R' Us, Walgreens, Toy's R' Us, and Costco presently. Contact Exergen at 1-800-422-3006 or medical@exergen.com if none of these are convenient for you.