Thyroflex
The patient is connected to the Thyroflex computer by placing a sensor above the middle knuckle of the left hand. A spot above the brachioradialis tendon (in the forearm) is identified, where the nerve will be stimulated. When stimulated, the tendon will make the middle finger move involuntarily. The time interval between the stimulation of tendon and the involuntary movement of the middle finer is measured by the computer. The average speed of conduction is calculated, indicating the level of intracellular thyroid function. This test causes no discomfort to patients.