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Hypoglossal Nerve Stimulator Placement

Medically reviewed by Drugs.com. Last updated on Jun 30, 2025.

What do I need to know about hypoglossal nerve stimulator (HNS) placement?

A HNS is a device used to help manage obstructive sleep apnea. The hypoglossal nerve controls the tongue muscles. A HNS helps improve breathing during sleep.

How does HNS work?

The HNS is placed under your skin in your upper right chest during surgery. The device sends a small amount of electrical current to the hypoglossal nerve. This causes the tongue to move forward to keep your airway open. The device is turned on 4 weeks after surgery to give the surgery areas time to heal. The device has the following parts:

How do I prepare for HNS placement?

What will happen during HNS placement?

What should I expect after HNS placement?

You will be taken to a room to rest until you are fully awake. Healthcare providers will monitor your heartbeat, blood pressure, and incision sites. Do not get out of bed until your healthcare provider says it is okay. Your provider will tell you when you can go home.

What are the risks of HNS placement?

The HNS may not work correctly, and you may need to have a part of the device replaced. You may get an infection or have pain, bruising, or swelling at any of the incision sites. You may weakness of the corner of your mouth, tongue weakness or problems moving your tongue. You may have discomfort, pain, or feel a shock during stimulation. On rare occasions you may have a collapsed lung.

Care Agreement

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Further information

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