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Temperature Assessment via the Temporal Artery:
Validation of a New Method
Arterial Heat Balance Thermometry at an Exposed Skin Site: Accuracy,
Comfort, and Convenience for Patient and Clinician
There has in the past been no method of thermometry that is considered by patients and clinicians to be comfortable, convenient, and accurate. Rectal, oral, axilla, and ear thermometry all have either significant discomfort due to the use of a body cavity, artifactual inaccuracies due to physiological/device phenomena, or both, thus making them less than desirable for the needs of both patient and clinician. The exposed skin eliminates the use of a body cavity, but an accurate method using the skin has heretofore not been demonstrated.
The superficial temporal artery demonstrates the necessary requirements for the skin thermometry method: it is easily accessible, contains no mucous membranes, and notably, it has no or very few arteriovenous anastomoses (AVA).1,2 Lack of AVA's means that perfusion rate is reliable under essentially all conditions, and the blood flow is relatively free of vasomotor control in response to thermomoregulatory stimuli. This property is unique to the temporal artery when considering all accessible cutaneous blood vessels. The high and reliable perfusion allows accurate mathematical computations of the heat lost to the environment due to the cutaneous flow, and thus an accurate calculation of the source arterial temperature at the heart.
As a site for temperature measurement, the temporal artery presents many benefits: it poses no risk of injury for patient or clinician, eliminates any need for disrobing or unbundling, and is suitable for all ages. Accordingly, Exergen, incorporating a patented and well-proven arterial heat balance method, developed instrumentation for non-invasive arterial temperature assessment on the skin over temporal artery. This report presents a validation of accuracy of the arterial heat balancemethod.
1 Bergersen TK. A search for arteriovenous anastomoses in human skin using ultrasound Doppler. Acta Physiol Scand Feb;147(2):195-201.
2 Takehiko I, Sessler et al. Influence of thermoregulatory vasomotion and ambient temperature variation on the accuracy of coretemperature estimates by cutaneous liquid-crystal thermometers, Anesthesiology, V 86, No 3, Mar 1997.
Exergen TemporalScanner Thermometer
The TemporalScanner Thermometer (TAT) is the most technologically advanced method of temperature assessment, measuring core body temperature with a gentle horizontal slide from the center of the forehead, across the temporal artery area to the hairline. The TAT detects the heat naturally emitting from the skin surface over the temporal artery using a patented arterial heat balance system to automatically account for the effects of ambient temperature on the skin. As a noninvasive thermometer, it does not comein contact with any mucous membranes, becoming first thermometer capable of use without disposable covers.
As a site for temperature measurement, the temporal artery presents many benefits: it requires less than 5 seconds, poses no risk of injury for patient or clinician, eliminates any need for disrobing or unbundling, and is suitable for all ages.
The TemporalScanner is used daily by more than 4,000 hospitals, tens of
thousands of clinics, office based practices, and nursing homes. And, more than 40 peer reviewed published studies attest to its accuracy.
A 90% cost savings is provided by the TAT because disposable covers are
optional. The vast majority of hospitals have approved the use of an alcohol or other hospital approved disinfectant wipe of the probe head between patients.
Resposable covers are available if preferred, and can be reused on the same patient. For isolation patients, a film sheath is available that encases the entire thermometer.
The Lifetime Warranty, unique to thermometry, protects the entire instrument, and eliminates spare parts storage, biomedical engineering labor, and all repair charges.
...and, it started with a kiss!
Specifications (28 KB)