bilateral symmetry. Skin temperature differences from one side of the body compared to the other are not only extremely small, but also very stable, and unaffected by the age of the patient. Data show differences between sides at the forehead to be 0.12°C at the forehead, and 0.25° at the lumbar region of the back. This symmetry forms the foundation for clinical interpretation of the varying surface temperature data.

In general, it is the relative readings between the body surface tem- peratures that are of interest. Hence, the general principle is all detec- tion is by exception. Accordingly, the temperature data from the nor- mal or reference area can then be used to adjust for the circadian varia- tions and for variations in the ambient temperature.

The change in body surface temperature with compromised blood flow is profound. A recent study was undertaken to mimic both partial and complete occlusion of blood flow to an extremity. The results indicate changes in skin surface temperature of an extremity reflect blood flow interruption or alteration in blood flow to that extremity.

A baseline for systolic blood pressure was determined for each subject and the manometer cuff inflated to three levels, 30 mmHg above sys- tolic, 25 mmHg below systolic and 50 mmHg below systolic, with tem- perature readings taken on the inside wrist at 15 second intervals. Even at the lowest cuff pressure, there is a clear indication at the end of three minutes of the surface temperature change due to the lowered tissue perfusion caused by the reduction in arterial blood flow. The data also indicate the time between occlusion or partial occlusion and a measur- able temperature drop is very short, well under one minute.

The surface temperature read- ings of the human body tend to be quite close between the bilaterally symmetric surfaces of region because of perfusion symmetry, but vary by several degrees on different body lo- cations because of perfusion differences. Both the hands and the feet can be substan- tially colder than the rest of the body surface due to vasomo- tor constriction of arterio- venous shunts as a ther- moregulatory response.

Effect of blood flow on body surface

temperature

19

Page 20 Page 22
Page 21
Image 21
Exergen DT 1001-LT, DT 1001-RS, DT 1001-LN manual
Page 20 Page 22

DT 1001-LN, DT 1001-RS, DT 1001, DT 1001-LT specifications

The Exergen DT 1001 series, consisting of the DT 1001-LN, DT 1001, DT 1001-RS, and DT 1001-LT, represents a cutting-edge advancement in non-invasive infrared thermometry technology. These models are designed for accurate and reliable temperature measurement across various settings, making them invaluable tools for healthcare professionals, educators, and individuals monitoring their own health.

A standout feature of the Exergen DT 1001 series is its precision in measuring core body temperature. Utilizing patented infrared technology, these devices detect the thermal radiation emitted by the temporal artery, thus providing an accurate representation of internal body temperature. This non-invasive method is not only safe but also quick, as it can yield results within seconds, making it ideal for both clinical environments and home use.

The DT 1001 series emphasizes ease of use. Equipped with a simple one-button operation, even individuals without technical training can operate the device effectively. The easy-to-read digital display provides clear temperature readings, which can often be coupled with visual and auditory alerts for fever detection, enhancing user experience.

Further enhancing user convenience is the memory function of the DT 1001 series. These models can store multiple readings, allowing users to track temperature trends over time. This feature is particularly useful in monitoring patients with fevers or chronic health issues where regular temperature checks are necessary.

The DT 1001-LN and DT 1001-LT are distinguished by their lightweight and portable design, making them suitable for on-the-go temperature checks. Conversely, the DT 1001-RS is optimized for clinical settings, featuring enhanced durability and robust performance under frequent usage.

Each model has been rigorously validated to meet clinical standards, ensuring that healthcare practitioners can rely on their accuracy. With their advanced technology, user-friendly design, and versatility, the Exergen DT 1001 series stands out as a leading choice in the realm of non-contact thermometers, promoting effective health monitoring for a wide range of users. Their continued popularity highlights a significant trend in modern healthcare towards efficient, precise, and non-invasive diagnostic tools.
Top Page Image Contents