NICE has been notified about this procedure and it is part of its work programme. The Interventional Procedures Advisory Committee (IPAC) will consider this procedure and NICE will issue an interventional procedures consultation document about its safety and efficacy for 4 weeks’ public consultation. IPAC will then review the consultation document in the light of comments received and produce a final interventional procedures document, which will be considered by NICE before guidance is issued to the NHS in England, Wales, Scotland and Northern Ireland.
Status In progress
Process IP
ID number 1767
Description Transcranial magnetic stimulation is typically done with the patient awake and sitting in a chair. The operator places an electromagnetic coil against the scalp, over a specific region of the brain, usually the left temporoparietal area. Pulses of electrical current in the coil generate rapidly pulsating magnetic fields that pass through the skull and meninges and into the brain. The magnetic field produced is relatively powerful but short lived (milliseconds). The precise mechanism of action is unclear but it produces both excitatory and inhibitory effects on cortical neurons. The amount of stimulation and the target area is adjusted for each patient. Treatment usually comprises daily or twice daily sessions lasting up to about 20 minutes. The number of sessions varies, but it could be up to 30. The aim is to stop or reduce the auditory hallucinations. Stimulation can be repetitive, with pulses of magnetic energy delivered at various frequencies or stimulus intensities. In the standard repetitive technique, individual pulses are repeated at a pre-set interval (repetition of pulses). In the theta-burst technique, short bursts of pulses are repeated at a pre-set interval (repetition of bursts). In the deep repetitive technique, deeper and broader brain regions are stimulated than in the standard technique.

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Key events during the development of the guidance:

Date Update
26 February 2020 - 25 March 2020 Interventional procedure consultation

For further information on how we develop guidance, please see our page about NICE interventional procedures guidance