Final answer:
The tympanic location, which involves measuring temperature in the ear canal using infrared ear thermometers, is the most accurate site for an EKG technician to use when assessing a patient's body temperature.
Step-by-step explanation:
When measuring a patient's body temperature, an EKG technician may consider several sites. According to the available data, the most accurate method would be using an infrared ear thermometer which places the sensor in the ear canal. This method is more accurate than the traditional alcohol thermometers used for oral or axillary temperature measurements, as it uses infrared technology from astronomy to measure the energy emitted by the eardrum. This approach allows for a quick and accurate temperature reading while avoiding contact with mucous membranes, which reduces the risk of cross infection. Therefore, the tympanic (4) location, which is in the ear, is the most accurate site for an EKG technician to use when measuring a patient's body temperature.