The Inspire Implant for Sleep Apnea

A sleep surgeon’s closer look at how the Inspire implant works, what the surgery involves, what the research shows, and what life looks like after implantation.

How I explain Inspire to my patients

Dr. Ryan Nord holds an Inspire pulse generator, the implantable device used in hypoglossal nerve stimulation therapy for obstructive sleep apnea.

Inspire is like a pacemaker for your breathing. It’s placed through two small incisions — one in your neck and one in your chest, both on the right side. Through the neck incision, we place a small stimulation cuff around the nerve that controls your tongue. We then tunnel a wire down to the chest, where it connects to the battery that powers the device.

The battery lasts about eleven years and never needs to be recharged. The surgery takes roughly an hour, and it’s outpatient — you go home the same day.

About a month later, once you’re fully healed, we activate the device in the office. You’re given a small remote and taught how to use it. At bedtime, you press a button to turn the device on. It pulses once to let you know it’s working, then delays about thirty minutes so you can fall asleep.

Once the therapy kicks in, Inspire senses your breathing with every breath and gently pulses your tongue forward to keep your airway open. In the trial that led to FDA approval, the typical patient’s apnea events dropped by about two-thirds — from roughly 29 an hour down to 9. That is a median, not a promise: some people do better, about a third don’t reach the trial’s definition of success, and a small number get no real benefit. I would rather you hear that from me now than find it out at your follow-up sleep study. You’ll come in about twice a year to have the device checked, and we’ll do a home sleep study three to four months after surgery to confirm everything is working well.

Ryan Nord, MD

Watch: Inspire explained in ten minutes

If you would rather listen than read: a ten-minute overview of Inspire, in my own words.

The player loads when you press play.

What’s actually being implanted?

The current generation of Inspire (Inspire V) has just two components, all hidden beneath the skin.

Medical illustration of the Inspire system in place: the small pulse generator sits under the skin of the upper chest below the collarbone, with a thin lead running up toward the neck

Why this generation matters — and what we do and don’t know

Every earlier Inspire had a third piece: a thin wire threaded between two ribs to sense your breathing. That wire is the reason a collapsed lung was ever on the risk list at all. In the FDA’s device-report database, the reported pneumothoraces, both cases of a wire migrating into the chest cavity, and the single case of lung penetration were all attributed to it. It was also behind four of the nine serious device problems that required another operation over five years in the pivotal trial.

Inspire V does not have that wire. The breathing sensor is built into the generator itself, so nothing is placed between the ribs.

Two things follow, and I want to be precise about both.

What has not changed is the part that does the work. The stimulation lead and the way the device moves your tongue are the same as the previous generation. This is not a new therapy — it is the same therapy with the breathing sensor moved inside the generator. In the data Inspire submitted to the FDA, that internal sensing performed as well as or better than the previous generation, and taking the wire out from between the ribs makes the operation safer. Nothing in my own practice, or in what I hear from other implanting surgeons, suggests otherwise.

What that means for the numbers on this page. The success and complication rates here come from the years of published experience with this therapy. They describe the same stimulation, the same nerve and the same operation, so they carry over — and where the wire was the cause, as with pneumothorax, Inspire V removes the cause rather than restating the risk.

And one thing that has not changed at all: Inspire V still needs a chest incision and a pocket for the generator. Infection, bleeding, the device shifting, tongue weakness and eventual battery replacement all carry over unchanged.

What does recovery look like?

Most patients are surprised by how manageable the recovery is. The device stays off during the entire healing period — there's no rush.

Surgery day

~1 hour, outpatient.
Go home same day.

Days 1–3

Most soreness.
OTC pain meds enough.

Weeks 1–2

Feeling significantly better; light activity.

Weeks 2–4

Resume normal activity.
Device stays OFF.

Activation Day!

1 month

Device turned on.
Remote training.

Sleep study at 3–4 months confirms therapy is working

Am I a candidate?

Candidacy depends on your sleep study results, airway anatomy, and what your insurance requires. Use the criteria below as a starting point — then check the coverage guide to see how they apply to you.

Moderate—Severe OSA
AHI between 15 and 100 events per hour of sleep
Unable to Use CPAP
Can't tolerate the mask, pressure, or it doesn't work. See what counts as failing CPAP.
BMI Requirements
FDA up to 40 · Medicare under 35 · some commercial plans ≤ 32
Low Central Apneas
Inspire treats obstructive events, not central ones
Pass DISE Exam
Airway anatomy checked while sedated before surgery. Learn how DISE works.
Age 22+
FDA approved for adults 22 and older; ages 18–21 only in specific circumstances

Insurance criteria vary by plan — deductibles, BMI cutoffs, and CPAP-trial requirements can all change what you qualify for.

See if you might qualify →

What the data shows

Inspire is one of the most studied surgical treatments for obstructive sleep apnea. The landmark STAR trial was published in the New England Journal of Medicine in 2014, with the same 126 patients followed out to five years.

68%

AHI reduction

Apnea events per hour of sleep

90%

Soft or no snoring

Bed-partner report at 5 years

116

Sleepiness score

Normalized daytime alertness (ESS)

5

Years followed

Longest follow-up of the trial that led to FDA approval

Which five-year number to trust. At five years, 75% of patients still met the success definition — but that is 75% of the 71 people who volunteered for a fifth-year sleep study, out of the original 126. Counting everyone, including 5 who died and 3 who had the device removed, the responder rate was 63%. The volunteers were a better-than-average group to begin with: their 12-month response rate was 74% against 52% among those who did not volunteer. I quote 63%.

Why success rates for this device range from 46% to 91%

They are mostly the same therapy measured different ways. A titration sleep study hunts for the single best setting and scores your apnea during that window — in one study patients were only asleep at that ideal setting for about 50 minutes. A full-night study at one fixed setting scores what you actually get all night. In 61 patients measured both ways at the same center, the success rate was 80% on the titration study and 46% on the full-night home study. Same patients. Same devices.

Whenever anyone quotes you an Inspire success rate, ask which sleep study it came from. I judge results on the full-night study, and that is the number I will quote you. The full explanation, with my own results →

Source: STAR trial, New England Journal of Medicine 2014, with 5-year follow-up in Otolaryngology–Head and Neck Surgery 2018.

How Inspire compares to traditional sleep surgery

Inspire doesn’t change your anatomy — it works with your anatomy. Unlike traditional tissue-removing surgeries, the therapy is adjustable and reversible.

Traditional Surgery (UPPP)

Cuts and restructures tissue

Approach
Removes / rearranges tissue
Success Rate
44% at 3+ yrs
Reversible?
No — permanent changes
Adjustable?
No
Side Effects
Permanent swallowing, voice, and taste changes
Readmission
Higher complication rate
Inspire Therapy

Works with your anatomy

Approach
Stimulates existing nerve
Success Rate
66% at 1 yr
Reversible?
Yes — can be removed
Adjustable?
Yes — settings tuned over time
Side Effects
Temporary soreness, much lower complication rate
Readmission
Significantly lower

How to read those two numbers. Inspire’s 66% is the STAR trial’s 12-month responder rate under one specific definition — apnea events cut by at least half and brought under 20 an hour (83 of 126 patients). The UPPP figure beside it pools nine long-term studies whose average follow-up ran from about three to seven years; under the identical half-and-under-20 definition it is 46.5%. The two are also measured at different distances from surgery. Compared at the same early timepoint the two operations are much closer — UPPP’s short-term figure is 67%. The gap opens later, because palate surgery decays: across the studies with more than one follow-up, average apnea events climbed back from 13.8 to 22.6 an hour between the early and late measurements. I quote the long-term number because that is the one you will live with.

Neither figure is the whole story of how success gets measured. The Inspire success rate — what it actually measures →

Living with Inspire

Once you’re up and running, the nightly routine is simple. Press a button at bedtime. Turn it off in the morning. That’s it.

Nightly Routine
Press the button on your remote at bedtime. Turn it off in the morning. That’s it.
Office Visits
About twice a year for a device check and settings tune-up. We review your usage data and adjust as needed.
Battery Life
Lasts approximately 11 years. No recharging needed. Quick outpatient swap when it runs low.
Inspire is MR conditional, and what’s allowed depends on your device model. Inspire IV and Inspire V systems are approved for full-body MRI at 1.5T and — as of February 2026 — 3T, under specific scan conditions (coil type, positioning, and parameters). Some earlier-generation devices are more limited, and the oldest model (3024) cannot have an MRI at all. You’ll receive an Inspire patient ID card — show it to the radiology team before any scan so they can confirm your exact model and its conditions.

Hear from a patient

A Facebook Live conversation recorded by VCU Health in 2018: one of my Inspire patients on what living with the implant is actually like.

27 minutes. The player loads when you press play.

This page is for educational purposes only and does not constitute medical advice. Individual results may vary. Clinical data referenced from the Inspire STAR Trial (Strollo et al., N Engl J Med, 2014) and the ADHERE post-approval registry. Inspire is an FDA-approved device for the treatment of moderate to severe obstructive sleep apnea in patients who meet specific eligibility criteria. Always consult with your physician to determine the best treatment option for your individual needs.

What Inspire surgery actually looks like

Reading about the procedure is one thing — seeing it is another. This is footage from an Inspire implant I performed, showing the part of the operation patients ask about most: the small incision in the neck, finding the hypoglossal nerve, and placing the stimulation cuff around it.

Viewer note: this is real operative footage. If you would rather not watch surgery, everything shown here is also explained in words above.

Surgeons and residents: the operation is taught step by step, with sixteen more clips, in the resident education center.

Risks and complications — the full picture

Every surgery has risks, and researching Inspire’s complications — so I can prevent them — has been a focus of my career. The short version:

  • Serious events are uncommon — under 2% in the pivotal trial’s first year.
  • In my own published research, Inspire patients had a 2.3% complication rate within 90 days versus 20.1% for traditional palate surgery — 23 of 1,014 against 204 of 1,014 propensity-matched patients drawn from a roughly 70-million-record national database. Readmission within 90 days was 3.5% versus 11.6%. Two things to be square about: a 90-day window favors an implant whose failure modes tend to be late, and because that study identified implants by a respiratory-sensor billing code, every patient in it necessarily had the older hardware.
  • The risks worth understanding in detail: bleeding, infection (~0.5–1.4% in published series), temporary tongue or lip weakness, neck tightness from the connecting wire, rare hardware problems — and the fact that Inspire is not a guaranteed cure.

Read the full discussion: how I counsel my own patients about every risk, with the published numbers →

When an implant isn’t the right choice

I implant both Inspire and Genio, and I tell patients straight: an implant is not always the answer. Some people get a better, safer, more durable result from something else. Here are the situations where I steer the conversation in a different direction.

Complete concentric collapse at the soft palate

If drug-induced sleep endoscopy (DISE) shows the soft palate collapsing inward from all sides simultaneously (complete concentric collapse, or CCC), Inspire is not approved and tends not to work well. Genio is not approved for this pattern in the United States either — whether it helps CCC patients is being tested in a trial now (see the Genio guide for where that evidence stands). For some patients a palatal procedure or a different approach makes more sense. The DISE finding matters more than the AHI here.

BMI above the labeled cutoff

Inspire’s FDA labeling carries a BMI ceiling of 40; Genio’s approved label states no limit, but its trial enrolled no one above 32, so that is where its evidence stops. Patients well above those boundaries have lower success rates in the trial data and in real-world registries. If you’re close to the cutoff, modest weight loss before surgery often changes the equation; if you’re well above it, weight management or bariatric evaluation typically deserves the first attempt. Not sure where you stand? Check your BMI here.

Central or mixed apnea predominant

Hypoglossal nerve stimulation treats obstructive events — the airway physically closing. If your sleep study shows that most of your events are central (the brain not signaling the breath) or that you have significant treatment-emergent central apnea, an implant won’t address the underlying problem. Bilevel ventilation (BiPAP, ASV) or other strategies are usually a better fit.

A real CPAP trial hasn’t happened yet

CPAP is the most effective, safest, and least expensive sleep apnea treatment we have. Before considering surgery, I want to know that you’ve had a serious attempt — different masks, humidification, pressure adjustments, sometimes a switch to BiPAP. Patients who get to surgery without a real CPAP trial often have unrealistic expectations of what an implant will deliver. See: Failing CPAP — when sleep surgery is worth considering.

Anatomy that points elsewhere

Sometimes DISE reveals patterns that suggest a more targeted procedure will help more than an implant — a deviated septum, large tonsils, a long soft palate, or specific lateral wall collapse. In those cases, a traditional sleep surgery (or a staged approach beginning with pharyngoplasty) may give a better result. The point of the workup is to find the path that fits your anatomy, not to fit you to a device.

What I tell patients

An implant is a good answer for the right patient. It is not the only answer, and it is not always the best answer. What deserves the evaluation is the value to you — not the device. If you’re considering Inspire or Genio, the goal of the consultation is to figure out whether either one is the right fit for you, and to say so plainly if neither one is.

References

Selected primary sources and trial data on hypoglossal nerve stimulation for obstructive sleep apnea. Citations are provided for educational reference; this page summarizes published evidence and is not a substitute for a clinical evaluation.

STAR trial (Strollo PJ Jr et al., NEJM 2014)

The pivotal trial that led to FDA approval of Inspire upper-airway stimulation. At 12 months, the apnea–hypopnea index fell 68% and oxygen desaturation events fell 70%, with sustained improvements in daytime sleepiness and quality of life.

N Engl J Med. 2014;370(2):139–149. doi:10.1056/NEJMoa1308659

STAR five-year follow-up (Woodson BT et al., Otolaryngol Head Neck Surg 2018)

Long-term outcomes confirmed durability: AHI reduction, oxygenation, and daytime sleepiness improvements were maintained at five years, with sustained patient satisfaction and quality-of-life gains.

Otolaryngol Head Neck Surg. 2018;159(1):194–202. doi:10.1177/0194599818762383

ADHERE registry — one-year outcomes (Heiser C et al., Eur Respir J 2019)

Real-world post-market data from patients treated outside a clinical trial. Among the 227 registry patients with final-visit data about a year after implant, median apnea events fell from 34 to 7 an hour — a mean per-patient reduction of 68% ± 34%. 81% met the at-least-half-and-under-20 standard. Median Epworth sleepiness fell from 12 to 6, and 94% said they would have the surgery again.

Eur Respir J. 2019;53(1):1801405. doi:10.1183/13993003.01405-2018

ADHERE registry — first report (Boon M et al., Otolaryngol Head Neck Surg 2018)

The registry’s initial multicenter report, establishing the data collection that the later analyses build on.

Otolaryngol Head Neck Surg. 2018;159(2):379–385. doi:10.1177/0194599818764896

ADHERE registry vs untreated comparators (Mehra R, Steffen A, Heiser C, et al., Ann Am Thorac Soc 2020)

Compares registry outcomes against patients who went untreated, rather than against the trial cohort alone.

Ann Am Thorac Soc. 2020;17(12):1610–1619. doi:10.1513/AnnalsATS.202001-015OC

FDA approval & labeling

FDA-approved indications, BMI cutoffs, and anatomic criteria define formal candidacy. The labeling reflects the populations studied in STAR and subsequent submissions and is what U.S. surgeons use to determine eligibility.

Inspire V — surgical technique (Huyett P, Suurna MV, Otolaryngol Head Neck Surg 2025)

The only peer-reviewed publication on the fifth-generation device to date. It documents that the generator internalizes the respiratory sensor, removing the separate intercostal sensing lead used by every earlier generation, and that the chest incision and generator pocket remain. It reports surgical technique only — no efficacy or complication outcomes.

Otolaryngol Head Neck Surg. 2025;173(3):778–781. doi:10.1002/ohn.1321

Adverse events in the FDA device database (Bellamkonda N, Shiba T, Mendelsohn AH, Otolaryngol Head Neck Surg 2021)

A five-year analysis of the FDA’s MAUDE database broken down by device component. The pneumothoraces, both pleural-space migrations and the single case of lung penetration all fall under the respiratory sensing lead — the component the current generation no longer uses.

Otolaryngol Head Neck Surg. 2021;164(2):443–447. doi:10.1177/0194599820960069

Adverse events across the full MAUDE record (Bentan MA, Nord R, Otolaryngol Head Neck Surg 2024)

My own analysis of 1,178 adverse-event reports filed with the FDA between 2014 and 2023 — the larger and more recent of the two MAUDE reviews cited here. Pneumothorax appeared in 50 reports, and its incidence per implant fell by half after FDA approval as the technique matured.

Otolaryngol Head Neck Surg. 2024;171(5):1580–1590. doi:10.1002/ohn.883

Inspire vs traditional sleep surgery — complications (Nord R, Fitzpatrick T, DeShazo JP, Reiter ER, Laryngoscope Investig Otolaryngol 2022)

My own study, comparing 1,014 propensity-matched patients in each arm from a national database of roughly 70 million records. Complications within 90 days were 2.3% after hypoglossal nerve stimulation against 20.1% after palate surgery; readmissions were 3.5% against 11.6%. The cohort was identified using a respiratory-sensor billing code, so these are patients implanted before the sensor moved inside the generator.

Laryngoscope Investig Otolaryngol. 2022;7(5):1659–1666. doi:10.1002/lio2.883

DISE for implant candidacy (Kezirian EJ et al., Eur Arch Otorhinolaryngol 2011 — VOTE classification)

Drug-induced sleep endoscopy with the VOTE (Velum, Oropharynx, Tongue base, Epiglottis) classification is the standard pre-operative assessment for identifying complete concentric palatal collapse — the main contraindication to Inspire.

Eur Arch Otorhinolaryngol. 2011;268(8):1233–1236. doi:10.1007/s00405-011-1633-8

Common questions about Inspire

What is the Inspire implant, and how does it work?

Inspire is a small implant that gently stimulates the nerve controlling your tongue (the hypoglossal nerve) during sleep. When the device senses you breathing in, it sends a mild signal that moves the tongue slightly forward, keeping the airway open. You turn it on at bedtime with a small remote and off in the morning. It works without a mask, hose, or machine.

Who qualifies for an Inspire implant?

FDA-approved candidates have moderate-to-severe obstructive sleep apnea, have tried and not tolerated CPAP, fall within the labeled BMI range, and have an airway pattern on drug-induced sleep endoscopy (DISE) that suggests Inspire will work. Candidacy is confirmed in consultation with a sleep surgeon after a sleep study and DISE.

How long is recovery after Inspire surgery?

Most patients go home the same day. Soreness around the neck and chest incisions is typical for one to two weeks and usually managed with over-the-counter pain medication. Most people return to desk work within a few days and resume normal activity within three weeks. The device itself is not turned on until about a month after surgery, once the incisions are fully healed.

Can I feel the Inspire implant at night?

Most patients describe the stimulation as a mild, tingling sensation that fades into the background within a few nights. You can adjust the strength yourself with the remote, and a built-in pause delay lets you fall asleep before stimulation starts. The implant under the skin is rarely noticeable once healing is complete.

Can I have an MRI with Inspire?

Inspire is approved as “MR-conditional,” meaning MRIs can be performed safely under specific conditions (coil type, body region, and parameters). You’ll receive an Inspire patient ID card to show your radiologist before any MRI. Always confirm with your radiology team and your sleep surgeon’s office in advance.

How long does the Inspire battery last?

The internal battery lasts roughly eleven years on average and does not need to be recharged. When it runs low, the generator is replaced in a brief outpatient procedure — much smaller than the original surgery.

When is Inspire not the right choice?

Inspire isn’t a fit for everyone. Patients with complete concentric collapse at the soft palate on DISE, a BMI above the FDA-labeled cutoff, predominantly central (rather than obstructive) apnea, or anatomy that doesn’t match the device’s mechanism may be better served by other treatments — including continued CPAP optimization, weight management, alternative implants, or different surgical procedures. Careful evaluation of these factors is part of the consultation.

Disclosures

I am a paid consultant to Inspire Medical Systems, a clinical investigator for Nyxoah, and a member of the clinical events committee for Nyxoah-sponsored trials including ACCCESS. Full disclosures are on my About page.

No manufacturer reviewed, funded, or contributed to this page. Where a study cited here was industry-funded, the text says so.

Try “success rate”, “BMI”, “Medicare”, “battery”, or “concentric collapse”.