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Transcranial magnetic stimulation (TMS) is an outpatient procedure used in patients with hard to treat depression.
This procedure is performed while the patient is completely awake and seated in a chair. The magnetic arm of the machine is placed near the front, left side of the head; the machine sends magnetic pulses into the brain through this arm, and causes it to create brief electrical currents. This therapy creates changes in the way the brain cells (neurons) interact in specific parts, or circuits, of the brain that controls mood.
The Center for Interventional Psychiatry began offering transcranial magnetic stimulation therapy in July 2015.
TMS is approved by the US Food and Drug Administration (FDA) for treatment-resistant depression after failure to improve with exposure to two antidepressant medication.
In some patients, antidepressants fail because they do not relieve the symptoms of depression. Other patients may not be able to tolerate the side-effects of antidepressants or may not be able to take them because of other medication or conditions.
TMS is performed in an outpatient setting. The patient sits still in a comfortable chair while the procedure is performed. During the first visit (called the mapping session) the machine is adjusted to fit the particular needs of the patient and the exact dose of magnetic pulse and location of placement of magnet is determined. These settings are then used throughout the course of the treatment by the TMS clinician.
Typically, the treatment is performed 5 days a week for 4 to 6 weeks. We do taper the patient off TMS once they complete a course of treatment.
Some patients may not see an improvement for several weeks, while others will see an improvement in their symptoms more quickly.
Each patient will be evaluated by our clinical staff and a physician to make sure they are a good candidate for TMS. Some people cannot have TMS, because it uses powerful magnets. Your doctor will need to know if you have any metal objects in your body, such as the following:
If your doctor decides that TMS is a good treatment option for you, you do not need to do anything to prepare.
TMS is a safe procedure, with minimal side-effects. The most common side-effect is headache, and this can be treated with over-the-counter medication. Some patients may experience a slight burning sensation in the scalp under the magnet during the procedure. A few patients may have facial twitches during their TMS session, but the machine can be moved slightly to relieve these twitches.
TMS is one of several options available to you, if you have hard to treat depression. This therapy works very well for some patients, but the overall success rate is about 40 to 50 percent. Patients who are helped by TMS can expect to have a remission of their depression symptoms for up to one year. If you have failed two different treatments of antidepressants and psychotherapy, you may be eligible to have electroconvulsive therapy (ECT). ECT is the gold-standard in treatment-resistant depression, and is also a safe, non-surgical option, which works very quickly to relieve symptoms. You may also benefit from Esketamine Therapy for hard to treat depression.
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