Inspire upper airway stimulation therapy is implanted during an outpatient surgery that typically takes about two to three hours under general anesthesia. The procedure involves three small incisions, each serving a specific purpose: one below the chin to place a stimulation cuff on the hypoglossal nerve, one on the upper chest to create a pocket for the pulse generator, and one along the lower ribcage to position a breathing sensor. The components are connected by leads threaded beneath the skin, and most patients go home the same day. While the surgery itself is relatively straightforward for experienced implanting surgeons, the path to getting one and the weeks that follow involve details worth understanding before you commit.
Who Qualifies for the Implant
Inspire is not a first-line treatment. You need to have moderate to severe obstructive sleep apnea and to have tried positive airway pressure (CPAP or BiPAP) without tolerating it before the device becomes an option. The standard eligibility criteria also include a body mass index under 35, since excess tissue in the airway and around the neck can reduce the device’s effectiveness.1Upper Airway Stimulation Therapy for Obstructive Sleep Apnea. Criteria for Patient Selection Your clinical history, body shape, airway anatomy, and sleep study data all factor into the initial evaluation.
If you clear those hurdles, there is one more step: a drug-induced sleep endoscopy, or DISE. During this test, a doctor sedates you and uses a small camera to observe how your airway collapses while you sleep. The reason this matters is that not all airway collapse patterns respond equally to hypoglossal nerve stimulation. When the obstruction happens primarily at the base of the tongue or the soft palate in a front-to-back direction, Inspire works well. But when the lateral walls of the throat collapse inward, outcomes drop. A recent study found that patients with lateral wall collapse saw roughly a 49% reduction in their apnea-hypopnea index, compared to about 67% in patients without it.2PubMed Central. Lateral wall collapse from sleep endoscopy and airflow shape predicts hypoglossal nerve stimulation efficacy in obstructive sleep apnoea That gap is clinically meaningful, and it is the main reason the sleep endoscopy is considered a required screening step rather than an optional one.
Incision One: The Stimulation Cuff on the Hypoglossal Nerve
The first and most delicate incision is made below the jawline, typically about two to three centimeters long, along a natural skin crease on the right side of the neck. Through this opening, the surgeon identifies and dissects the hypoglossal nerve, which controls tongue movement. The goal is to isolate the specific branches of the nerve that push the tongue forward and stiffen the airway, while avoiding branches that pull the tongue backward, since stimulating the wrong branches would actually worsen obstruction rather than relieve it.
A small cuff electrode is wrapped around the targeted nerve branches. This cuff is the business end of the entire system. When activated during sleep, it delivers mild electrical pulses that cause the tongue to move forward slightly, opening the airway. The stimulation is not strong enough to wake you up, and people typically describe the sensation as a gentle tingle or a slight pressure in the tongue. Getting the cuff placement right is the single most important step of the surgery, because it determines whether stimulation will be effective and comfortable for years to come.
Incision Two: The Pulse Generator Pocket
The second incision is made on the upper right chest, just below the collarbone, in roughly the same position where a cardiac pacemaker would sit. Through this opening, the surgeon creates a small subcutaneous pocket and places the Inspire pulse generator, which is about the size of a silver dollar but slightly thicker. This is the device’s brain and battery. It contains the microprocessor that decides when and how to deliver stimulation, and it is the component you interact with via the handheld remote control.
The generator connects to the stimulation cuff in the neck via a lead that is tunneled under the skin between the two incisions. The tunneling process uses a specialized tool that creates a narrow path beneath the skin and the platysma muscle, staying superficial to the deeper neck structures. The lead is then pulled through this channel and connected to the generator. From the outside, you cannot see the lead at all, only a thin line on imaging.
Incision Three: The Breathing Sensor
The third incision sits along the right side of the ribcage, between two ribs, roughly at the level of the armpit or slightly below. Through this opening, the surgeon places a small pressure-sensing lead between the external and internal intercostal muscles. This sensor detects the slight pressure changes that occur in the chest with each breath. It tells the pulse generator when you are inhaling, so the system can time its stimulation pulses to coincide with inspiration, which is when the airway is most likely to collapse.
The breathing sensor lead is then tunneled under the skin up to the chest pocket, where it connects to the pulse generator. This is the longest tunneling path of the procedure, running from the lower ribcage up to the collarbone area. Getting the sensor positioned correctly is important because if it does not reliably detect breathing, the device cannot synchronize stimulation properly, and you end up with either missed breaths or stimulation firing at the wrong time in the breathing cycle.
The Tunneling That Ties It All Together
After all three components are placed, the surgeon uses a tunneling instrument to route the two leads subcutaneously to the pulse generator pocket. One lead runs from the neck down to the chest; the other runs from the ribcage up to the same pocket. Both are secured at the generator with set screws, and the generator itself is sutured to the underlying tissue to prevent it from shifting. The three incisions are then closed, typically with absorbable sutures and skin adhesive.
This tunneling step is mechanically straightforward but matters for long-term comfort. If leads are routed too superficially, they can be visible or palpable under thin skin. If they are under too much tension, they risk pulling on the cuff or sensor over time, especially with normal head and body movement. Lead tension is actually one of the recognized complications; in one reported case, generator migration in the chest pocket created tension on the stimulator lead, requiring an additional operation to resecure the device.3PubMed. Hypoglossal nerve stimulator generator migration: INSPIRE device reimplantation with parallels to cardiac implantable electronic devices
Why Everything Starts on the Right Side
You may have noticed that the standard procedure places every component on the right side of the body. This is intentional. The pulse generator sits on the right chest specifically to avoid being near the heart, which sits left of center. This matters for two reasons: it reduces the chance of electrical interference with cardiac monitoring (relevant for people who might later need cardiac devices), and it keeps the generator pocket away from the left-sided structures that could complicate the surgery, particularly the thoracic duct and the nearby vascular anatomy.
However, some patients need a left-sided implant. People who already have a cardiac pacemaker or defibrillator on the right chest, those with prior right-sided neck surgery or radiation, or patients with anatomical variants may be better served by a left-sided approach. A case series of five patients demonstrated that a left-sided, two-incision technique (eliminating the separate breathing sensor incision by integrating its placement through the chest pocket incision) was feasible, with no adverse events or negative impact on device functionality.4PubMed Central. Implantation of the hypoglossal nerve stimulator via left-sided, 2-incision approach This two-incision approach represents a meaningful evolution from the original three-incision technique, offering an alternative for patients who cannot receive a right-sided implant.
Recovery and When the Device Gets Turned On
Most people go home the same day or the morning after surgery. The recovery is not dramatically painful for most patients, but you will be sore at all three incision sites. The chest pocket and the rib incision tend to be the most uncomfortable in the first week, since those areas move with every breath and arm movement. Surgeons typically recommend limiting heavy lifting and vigorous upper-body activity for a few weeks to let the pocket and tunneled leads settle into position.
The device is not activated immediately. There is usually a waiting period of about two to four weeks after surgery to allow the incisions and the tissue around the cuff and sensor to heal. Turning the device on too early risks displacing the cuff before scar tissue has anchored it in place. At the activation visit, a clinician programs initial settings using an external programmer, and you learn how to use the handheld remote to turn the device on at bedtime and off in the morning.
Getting to optimal settings takes time. The post-activation care pathway involves gradually increasing the stimulation amplitude over a series of follow-up visits, guided by both how you feel and by objective sleep study data. This titration process can take anywhere from a few weeks to nearly a year. One case report documented a patient who achieved both subjective and objective improvement within about five weeks of activation using an unconventional electrode configuration, but the typical pathway ranges from three to twelve months.5PubMed Central. The activation, clinical course, and clinical outcome of using an unconventional electrode configuration in a patient newly implanted with Inspire® therapy: a case report Most patients find a comfortable, effective setting somewhere in between, but it is worth knowing upfront that the device does not work perfectly on night one.
Surgical Risks and Reported Complications
Every implanted device carries surgical risk, and Inspire is no exception. The most common complications reported to the FDA’s adverse event database include infection, pain, and fluid collections like hematomas or seromas at the incision sites. An analysis of that database identified 1,312 adverse events across 1,178 reports, with infection accounting for about a quarter of them, pain for roughly a fifth, and hematoma or seroma for about a tenth.6PubMed. Comprehensive Analysis of Adverse Events Associated With Hypoglossal Nerve Stimulators: Insights From the MAUDE Database Roughly four out of five of these events required some form of medical or surgical intervention, with device removal being the most frequent procedure and device repositioning the second most frequent.
An earlier, smaller analysis of the same database over a five-year period found 134 adverse events among 132 patient reports. Device migration and infection were among the most common problems. That analysis also flagged some complications that had not been seen in the large clinical trials used to gain FDA approval, including pneumothorax (a collapsed lung from the rib-level sensor placement), pleural effusion, and lead migration into the pleural space.7PubMed. Adverse Events in Hypoglossal Nerve Stimulator Implantation: 5-Year Analysis of the FDA MAUDE Database These are rare but serious, and they underscore that the breathing sensor incision near the ribs carries its own specific risks distinct from the neck and chest incisions.
Context matters here. Adverse event databases collect every reported problem, without a denominator of how many total implants went smoothly. They overrepresent complications relative to the overall implant population, because uneventful surgeries rarely generate reports. Still, the data are useful for understanding the types of things that can go wrong, even if they cannot tell you the precise odds.
How Well It Works
The landmark trial published in the New England Journal of Medicine in 2014 followed 126 patients and found that at twelve months, the median number of apnea and hypopnea events per hour dropped by about two-thirds, from roughly 29 to 9.8PubMed. Upper-Airway Stimulation for Obstructive Sleep Apnea Oxygen desaturation events fell by a similar margin. These results held up at eighteen months, with the median reduction in apnea events staying around two-thirds and measures of daytime sleepiness and quality of life remaining significantly improved compared to baseline.9PubMed Central. Upper Airway Stimulation for Obstructive Sleep Apnea: Durability of the Treatment Effect at 18 Months
A more recent meta-analysis pooling data from 39 study groups and over 3,200 patients found that roughly three out of four patients met the standard clinical definition of a good response. The average reduction in apnea events across studies was about 23 events per hour, and daytime sleepiness scores improved by about four and a half points on a standard scale.10PubMed Central. Hypoglossal Nerve Stimulation for Obstructive Sleep Apnea: A Systematic Review and Meta-Analysis on Responder-Based Outcomes and Between-Study Heterogeneity However, the variation across studies was enormous, with individual study response rates ranging from about a quarter to nearly all patients. That spread reflects real differences in patient selection, surgical experience, and how outcomes were measured. The point is that while Inspire works well for most carefully selected patients, it is not a guaranteed fix for everyone.
What Bed Partners Report
Sleep apnea does not just affect the person who has it. The snoring, gasping, and restless sleep take a toll on anyone sharing the bed. One of the underappreciated benefits of Inspire is the impact on the bed partner’s experience. In a study surveying partners of Inspire users, nearly all reported that the patient was more comfortable with the device than they had been with CPAP. About nine out of ten said their own sleep quality improved, and a similar proportion reported that their partner’s snoring was reduced. Most bed partners did not need to motivate the patient to use the device, which is a notable contrast to CPAP, where compliance is a perennial struggle and partners often end up in the role of enforcement.11PubMed Central. Bed Partners’ Perspectives and Sleep Quality After Hypoglossal Nerve Stimulation Therapy for Obstructive Sleep Apnea About four out of five partners said they were satisfied with the therapy and would recommend it to others.
Living with the Implant Long Term
Once the titration period is done and your settings are optimized, the nightly routine is simple: you press a button on the handheld remote at bedtime, fall asleep, and the device cycles on and off with your breathing throughout the night. In the morning, you press the button again to turn it off, or it times out automatically. There is no mask, no hose, no machine noise, and no dry mouth from pressurized air. For many people, this simplicity is the entire point.
The battery in the pulse generator lasts roughly eleven years, after which the generator needs to be replaced through a minor procedure that reopens only the chest pocket incision. The stimulation cuff and breathing sensor typically do not need to be replaced at the same time, since they have no battery. You will need to avoid certain types of MRI scans depending on the device model (though newer versions are becoming more MRI-compatible), and you should carry a device identification card similar to what pacemaker patients carry.
Weight gain after implantation can diminish the device’s effectiveness, since added tissue in the airway creates more obstruction for the nerve stimulation to overcome. If your BMI climbs above the range where the device works well, you may find that your sleep apnea symptoms return despite the device still functioning properly. This is one of the reasons surgeons emphasize weight management as part of the overall treatment plan, not just a box to check during candidacy screening.
MRI Restrictions and Other Practical Considerations
One concern that comes up frequently is whether having an Inspire implant limits your future medical care. The answer depends partly on the device generation. Earlier models carried broader MRI restrictions, while newer versions are conditionally MRI-compatible, meaning scans can be done under specific conditions (certain magnet strengths, body regions, and device settings). Your implanting center will provide documentation of exactly which model you have and what is and is not safe. If you need an MRI, the imaging team will need to confirm compatibility before proceeding.
Other medical procedures generally are not affected. Dental work, diagnostic X-rays, CT scans, and most outpatient procedures proceed normally. Electrocautery during other surgeries may require the device to be turned off temporarily, similar to the precautions taken with cardiac pacemakers. If you ever need emergency surgery, the presence of the device should be communicated to the anesthesia team, but it does not typically change the surgical approach for unrelated procedures.
Airport security scanners and consumer electronics do not interfere with the device. The remote control uses a short-range radio signal that will not trigger anything in a public setting, and household items like microwaves and cell phones are not strong enough to affect the implant. The practical disruptions to daily life from having the device are minimal once the incisions heal, which is a large part of its appeal for people who found CPAP intolerable.