With the test stimulator, we implant a temporary unit, which is much like an IV tube underneath the skin, and leave it in for a few days to see if the patient stops feeling the headaches. If the unit works, it does so both dramatically and immediately. The patient will return to the office three to seven days later and tell us if it worked. The trial is a medical procedure performed in the outpatient setting at the hospital and takes 15 minutes. During this completely painless procedure, the patient is given an IV sedative and once asleep, a tiny IV tube is placed above each eyebrow and two more are placed in the back of the head. There is no incision during the trial. When the patient wakes up, they have tape over the upper eyebrow area and small wires sticking out from underneath that plug into a battery box located outside of the body. Once in the recovery room, a representative from Reed Migraine Centers will turn on the system, and the patient will begin to feel a mild, tingling sensation in the forehead, as well as in the back of the head. The patient will then go home wearing the temporary unit for three to seven days. Typically, there are dramatic effects and the patient will know, with a high degree of certainty, whether or not the procedure will work right away. The patient will return after the trial period and the temporary unit will be removed. If the patient does not see a dramatic change in their headaches the patient is not a candidate for The Reed Procedure®. If it did work, then the patient moves forward with a permanent stimulator implant scheduled within a couple of weeks from the trial date. With the ability to test the implant neurostimulator, we are highly confident that the permanent stimulator will work effectively on the patient.