Inspire is an implanted device that treats obstructive sleep apnea by electrically stimulating the nerve that controls your tongue. Each time you breathe in during sleep, the device sends a mild pulse that moves your tongue forward, preventing it from collapsing into your airway. It’s designed for people with moderate to severe sleep apnea who can’t tolerate CPAP.
How the Device Opens Your Airway
The core of Inspire’s design targets the hypoglossal nerve, which runs from the base of the skull down through the neck and controls tongue movement. A small electrode wrapped around a branch of this nerve delivers a gentle electrical pulse timed to each breath. That pulse causes the tongue to push slightly forward, which pulls the surrounding soft tissue away from the back of the throat and opens the airway.
This happens automatically throughout the night. A separate sensor placed between the rib muscles detects the rhythm of your breathing, and the implanted generator uses that signal to synchronize stimulation with each inhale. You don’t feel your tongue move, and you don’t wake up. The airway simply stays open, allowing normal airflow where it would otherwise be blocked by collapsing tissue.
What Gets Implanted
The system has three components, all placed under the skin during a single surgery. A small pulse generator (similar in size to a pacemaker) sits just below the collarbone. A stimulation lead runs from the generator up to the hypoglossal nerve in the neck. A breathing sensor lead extends from the generator down between the ribs to detect your breathing pattern.
The surgery requires two incisions: one in the upper neck below the jaw, and a second below the collarbone. The procedure takes roughly 90 minutes and is done under general anesthesia, typically as an outpatient surgery. Most people go home the same day.
The device isn’t activated right away. Your surgeon will wait about a month for the incisions to heal before turning the system on and calibrating the stimulation strength.
Using It Every Night
Inspire comes with a small handheld remote. Before bed, you press a button to turn therapy on. There’s a built-in delay (usually 30 minutes, adjustable by your doctor) so stimulation doesn’t begin until you’ve had time to fall asleep. When you wake up in the morning, you press the button again to turn it off.
The remote also lets you pause stimulation if you wake up during the night, and adjust the intensity up or down within a range your doctor has set. Over the first few months, your doctor will fine-tune the stimulation level during follow-up visits, sometimes using an overnight sleep study to confirm the settings are working. Most people adjust to the sensation within a few weeks.
How Well It Works
The landmark clinical trial for Inspire found a 68 percent reduction in breathing interruptions per hour, dropping from an average of 29.3 events per hour down to 9.0 events at the 12-month mark. Two-thirds of patients achieved at least a 50 percent reduction and fell below 20 events per hour, which is the threshold where symptoms like daytime sleepiness and cardiovascular risk start to drop meaningfully.
Those numbers hold up over time. Long-term follow-up data from the same trial showed sustained results at three and five years. For context, CPAP is more effective on paper, but only when people actually wear it. Inspire’s advantage is consistency: once it’s implanted, it works every night without straps, masks, or hoses.
Who Qualifies
The FDA has approved Inspire for adults with moderate to severe obstructive sleep apnea, defined as 15 to 100 breathing interruptions per hour. You also need to have tried CPAP and been unable to use it consistently. The BMI limit was originally set at 32 but has been expanded to 40 for patients in the higher range, with an ongoing post-approval study tracking long-term outcomes in that expanded group.
One important screening step happens before surgery: a drug-induced sleep endoscopy, where a doctor sedates you lightly and uses a small camera to watch how your airway collapses during sleep. Inspire works well when the airway closes in a front-to-back pattern, because moving the tongue forward directly counteracts that collapse. But if the soft palate collapses inward from all sides (called complete concentric collapse), the tongue can’t solve the problem, and Inspire won’t be effective. That pattern rules out roughly 20 to 30 percent of otherwise eligible candidates.
Battery Life and Long-Term Maintenance
The pulse generator’s battery is designed to last approximately 11 years. When it runs low, replacing it is a straightforward outpatient procedure: the surgeon opens the original incision below the collarbone, swaps the generator, and connects it to the existing leads. The leads themselves typically don’t need replacement, so the surgery is shorter and simpler than the original implant.
There are no consumable parts, no nightly cleaning, and no supplies to reorder. An MRI can be performed under specific conditions (your doctor will confirm compatibility based on your model). The device doesn’t set off airport metal detectors, though it will show up on a body scan, so carrying your patient ID card when traveling is helpful.
Risks and Limitations
The most common side effects are tongue soreness or mild discomfort from the stimulation, which usually improves as settings are adjusted. Some people notice a tingling sensation in the tongue during the first few weeks. Surgical risks are those typical of any implant procedure: infection, swelling, and temporary discomfort at the incision sites.
Inspire is not a cure for sleep apnea. If the device is turned off or removed, the apnea returns. It also doesn’t work for central sleep apnea, which is caused by the brain failing to signal breathing rather than by physical airway obstruction. And while it eliminates the nightly hassle of CPAP, it does require a surgical procedure, a recovery period, and periodic follow-up to keep settings optimized.