A spinal cord stimulator (SCS) is a medical device that is implanted under the skin to treat chronic back pain, particularly pain that has not responded to other treatments such as medications, physical therapy, or surgery. The device works by delivering electrical impulses to the spinal cord, which can help to interrupt the pain signals traveling from the spine to the brain.

The SCS system consists of two components: a small pulse generator and a lead with electrodes. The pulse generator is implanted under the skin, usually in the lower abdomen or buttocks, and is connected to the lead with electrodes, which is inserted into the epidural space near the spinal cord.

Once the device is in place, it is programmed by a healthcare professional to deliver electrical impulses at specific frequencies and intensities to target the patient's pain. The patient may be able to adjust the stimulation level using a handheld remote control. SCS is typically used to treat chronic back pain caused by a variety of conditions, including failed back surgery syndrome, complex regional pain syndrome, and other nerve-related conditions. The procedure is generally considered safe, but as with any surgical procedure, there are potential risks and complications, such as infection, bleeding, or device failure.

Patients who have an SCS implanted should also be aware of potential side effects, such as pain at the site of implantation, numbness, tingling, or muscle spasms. It's important to discuss the risks and benefits of SCS with your healthcare provider to determine if it's an appropriate treatment option for your specific condition and needs.