Inspire therapy treats obstructive sleep apnea by electrically stimulating the nerve that controls your tongue, keeping your airway open while you sleep. Unlike CPAP, which pushes air through a mask, Inspire is a small device implanted under your skin that detects each breath you take and gently moves your tongue forward in sync with your breathing. The result: your airway stays clear without any external equipment.
The Three Implanted Components
The Inspire system has three parts, all placed under the skin during a single surgery. A small pulse generator, similar in size to a pacemaker, sits just below the collarbone. This is the brain of the system: it contains the battery, stores your therapy settings, and coordinates everything.
A sensing lead runs from the generator to the muscles between your ribs on the side of your chest. This lead has a pressure-sensitive membrane that detects the mechanical movement of your breathing and converts it into an electrical signal. It tells the generator exactly when you’re inhaling.
A stimulation lead runs from the generator up to the hypoglossal nerve in your neck. This is the nerve that controls your tongue. The lead wraps around the nerve with a flexible cuff that has tiny electrodes on its inner surface. Each time the sensing lead detects an inhale, the generator sends a mild electrical pulse through this cuff, causing your tongue to stiffen and push slightly forward. That forward motion opens the space behind your tongue, which is the exact spot where the airway collapses in most people with obstructive sleep apnea.
What You Do Each Night
You control the system with a small handheld remote. When you’re ready to sleep, you press a button to turn the device on. There’s a built-in delay (typically 30 minutes) so you can fall asleep before stimulation begins. The stimulation then runs automatically throughout the night, pulsing in rhythm with your breathing. In the morning, you press the button again to turn it off. The remote also lets you adjust the stimulation intensity up or down if needed.
The Surgery and Recovery
Implanting the device is an outpatient procedure that takes about three hours. The surgeon makes three incisions: one on the upper neck to access the hypoglossal nerve, one just below the collarbone for the pulse generator, and a third lower on the chest near the armpit for the breathing sensor lead. Most people go home the same day.
For the first week, you should avoid strenuous activity and heavy lifting. You’ll also need to keep from raising the arm on your implant side above shoulder height for about a month, which gives the leads time to settle into position. The device isn’t turned on right away. Your doctor will activate it roughly a month after surgery, once you’ve healed, and then adjust the settings over several follow-up visits to find the stimulation level that works best for you. This tuning process, sometimes done during an overnight sleep study, is what determines how effective the therapy will be.
How Well It Works
In the landmark clinical trial (called the STAR trial), patients experienced a 68 percent reduction in breathing disruptions, dropping from an average of 29.3 events per hour to 9.0 events per hour at the 12-month mark. Two-thirds of participants hit the clinical success threshold: at least a 50 percent reduction with fewer than 20 events per hour. Those are meaningful numbers. An event count under 15 per hour is generally considered mild sleep apnea, and many patients land in that range or below.
The battery inside the pulse generator lasts approximately 11 years. When it runs low, it’s replaced during a simple outpatient procedure that doesn’t require removing the leads.
Who Qualifies
Inspire isn’t a first-line treatment. You need to have tried CPAP or BiPAP and either couldn’t tolerate it (most people qualify because they can’t wear the mask consistently) or it didn’t adequately control your apnea. Beyond that, the FDA approval covers adults 22 and older with moderate to severe obstructive sleep apnea (15 to 100 breathing disruptions per hour) and a BMI of 40 or below. Teens aged 18 to 21 with the same severity range also qualify, and adolescents 13 to 18 with Down syndrome are approved for a narrower range.
Insurance coverage is often more restrictive than the FDA label. Medicare, for example, currently covers it for patients 22 and older with a BMI under 35 and 15 to 65 events per hour. Medicare also requires that your apnea be predominantly obstructive (not central), meaning your brain is sending the signal to breathe but your airway is physically blocked.
One critical screening step is a procedure called drug-induced sleep endoscopy, or DISE. While you’re sedated, a doctor uses a thin camera to watch how your airway collapses during sleep. If your soft palate collapses in a complete circular pattern (called complete concentric collapse), Inspire won’t work well for you because tongue stimulation alone can’t overcome that type of obstruction. Large tonsils can also disqualify you, since they physically block the airway in a way the device can’t address.
Risks and Side Effects
Up to 40 percent of patients in the STAR trial experienced some kind of adverse event, though most were not serious. The most common issues are tongue-related: soreness, mild weakness, or an unusual sensation during stimulation as the nerve fires. These effects are often manageable by adjusting the stimulation settings.
More significant complications from the device itself include infection at the implant site (the most frequently reported issue in post-market data), temporary nerve irritation causing numbness or tingling, and fluid buildup around the generator. A review of reported adverse events found that about 42 percent of cases required a reoperation, most commonly to remove or reposition the device. That number comes from a database that captures reported problems rather than routine successes, so it doesn’t represent the overall reoperation rate for all patients, but it does highlight that device-related complications sometimes need surgical correction.
You also can’t get most types of MRI scans with older Inspire models. Newer models allow head and extremity MRIs under specific conditions, but full-body MRI remains restricted. If you have other conditions that might require frequent imaging, this is worth discussing before implantation.
What Daily Life Looks Like
Most people describe a mild tingling or tightening sensation in the tongue when the device is on. It’s noticeable at first but something most users adjust to within a few weeks. Because the system works internally, there’s no mask, no hose, no machine noise, and nothing to pack when you travel. You charge nothing and clean nothing. The remote is the only external piece, and it’s about the size of a TV remote. Bed partners often notice the difference before the patient does, since snoring drops significantly once the device is tuned properly.