Supraglottoplasty: Surgery for Laryngomalacia, Recovery and Success Rates
Updated: 3 days ago
Written and medically reviewed by Dr. Baraa Alnahhal, MD · Last reviewed: November 2026 · How we review
Quick Answer: What is supraglottoplasty?
Supraglottoplasty is a short surgery that removes and reshapes floppy tissue above the vocal cords so it no longer falls into the airway. It's the main surgical treatment for laryngomalacia, the most common cause of noisy breathing in babies. It takes less than an hour, most babies stay one night, and success rates range from 70% to 100%. [1]
What the research says
Most children improve fully after treatment. A meta-analysis of 100 studies covering 18,317 children with laryngomalacia found that 87.9% had stridor (noisy breathing), 86.1% of treated children had supraglottoplasty and 73.6% had complete resolution of symptoms; in children with sleep-disordered breathing, the apnea-hypopnea index fell by about 10 events per hour. (Mills et al., International Journal of Pediatric Otorhinolaryngology, 2024) [2]
Operating on both sides lowers the chance of a second surgery. In 20 studies of 1,186 children, the repeat-surgery rate was 4.1% after surgery on both sides versus 18.0% (including completion surgery) after one-sided surgery, while airway scarring (supraglottic stenosis) occurred in 1.2% of two-sided procedures and 0% of one-sided procedures. (Avillion et al., Otolaryngology–Head and Neck Surgery, 2019) [3]
Key takeaways
Supraglottoplasty trims excess tissue of the voice box (larynx) so it does not block the airway. [1]
It mainly treats laryngomalacia in babies; about 20% of babies with laryngomalacia need it. [1]
It is usually recommended only when nonsurgical treatments have not worked. [1]
The surgery takes less than an hour, and most babies go home after one night. [1]
Recovery takes about one to two weeks, and success rates range from 70% to 100%. [1]
Who needs supraglottoplasty?
Supraglottoplasty is most often done in infants, though older children and adults sometimes need it. It is usually recommended only after nonsurgical treatments have failed. [1]
The main reason for the surgery is laryngomalacia. In this condition, floppy tissue around the voice box falls back over the airway when a baby breathes in, causing noisy breathing. Not every baby with laryngomalacia needs surgery, but about 20% do. [1]
How laryngomalacia affects a baby's airway and who needs surgery.
Severe laryngomalacia can make it hard for a baby to breathe, eat and sleep. Working hard to breathe also burns extra calories, which can lead to weight loss. [1]
Less often, supraglottoplasty is used to treat obstructive sleep apnea (OSA) in children and adults. [1]
How do you prepare for supraglottoplasty?
Little preparation is usually needed. Your child's surgeon may: [1]
Prescribe acid reflux medicine for a few days before surgery if your child has reflux
Order a swallow study to check that swallowing is normal
Ask you to stop food and drink for several hours before surgery
What happens during supraglottoplasty?
The surgery is done in a hospital under general anesthesia, so your child is fully asleep. The surgeon works through the mouth, using traditional surgical instruments or a laser. The main steps are: [1]
Viewing the voice box with a laryngoscope.
Making small cuts across the aryepiglottic folds on both sides of the larynx.
Removing and reshaping the excess tissue with tiny instruments.
Controlling bleeding with gauze.
The main steps of supraglottoplasty.
Supraglottoplasty at a glance
Item | Typical detail |
Anesthesia | General (your child is asleep) |
Operating time | Less than one hour |
Approach | Through the mouth, with instruments or a laser |
Hospital stay | Usually one night for observation |
Recovery | About one to two weeks |
Sources: [1]
What is recovery like after supraglottoplasty?
Recovery usually takes one to two weeks, depending on how severe the condition was and how much surgery was needed. [1]
Swelling and discomfort are common, especially in the first few days. Breathing may sound worse for a short time, and your child may have some trouble feeding. These changes are normal and temporary. [1]
After surgery, care usually includes: [1]
Anti-reflux medicines, such as H2 blockers or proton pump inhibitors
Pain relievers
Rest
Following your surgeon's instructions on when to give each medicine
When to call your child's doctor
Contact your child's provider if they have: [1]
Noisier breathing after two weeks
Coughing when drinking liquids
A fever
Pain that medicine does not relieve
Shortness of breath
What are the benefits and risks?
Key numbers for supraglottoplasty.
The main benefit is easier breathing. In babies with laryngomalacia, it can also improve feeding and sleep, which support growth and development, and it can reverse weight loss caused by hard breathing. Reported success rates range from 70% to 100%. Success rates are lower in children with certain syndromes, neurological conditions or heart conditions. [1]
Risk | What it means |
Aspiration | Food or liquid goes into the airway |
Breathing problems continue | The airway may still be partly blocked |
Bleeding | Heavy bleeding during or after surgery |
Infection | Germs infect the surgery area |
Swallowing trouble | Difficulty swallowing after surgery |
Damage to nearby structures | Injury to tissues around the larynx |
Blood clots | A clot forms after surgery |
Sources: [1]
The outcomes are predictable, and the overnight hospital stay lets the care team respond quickly if a problem happens. [1]
Conclusion
Supraglottoplasty is a quick and effective way to open a baby's airway when laryngomalacia is severe. By trimming the floppy tissue above the vocal cords, it helps many children breathe, feed and sleep better.
Most babies go home the next day and recover within one to two weeks. Call your child's doctor if noisy breathing gets worse after two weeks, or if your child coughs with drinks, has a fever or struggles to breathe.
Keep learning: Read our guide to tracheomalacia, another cause of noisy breathing, or learn about sleep apnea in children.
FAQ
What is supraglottoplasty?
It is surgery that removes and reshapes excess tissue above the vocal cords so it does not fall into and block the airway.
What is supraglottoplasty used for?
It mainly treats laryngomalacia in babies. Less often, it is used for obstructive sleep apnea in children and adults.
How many babies with laryngomalacia need surgery?
About 20% of babies with laryngomalacia need supraglottoplasty.
How long does supraglottoplasty take?
The surgery usually takes less than one hour.
Will my baby stay in the hospital after supraglottoplasty?
Most babies stay one night in the hospital for observation.
How long is recovery after supraglottoplasty?
Recovery usually takes one to two weeks.
Is it normal for breathing to sound worse after surgery?
Yes. Breathing may sound worse for a short time and feeding may be harder, but these changes are normal and temporary.
How successful is supraglottoplasty?
Reported success rates range from 70% to 100%, though they are lower in children with certain syndromes, neurological issues or heart conditions.
What are the risks of supraglottoplasty?
Risks include aspiration, continued breathing problems, bleeding, infection, swallowing trouble, damage to nearby structures and blood clots.
When should I call the doctor after supraglottoplasty?
Call for noisier breathing after two weeks, coughing with drinks, fever, pain that medicine does not help or shortness of breath.
How do I prepare my child for supraglottoplasty?
Little preparation is usually needed. The surgeon may prescribe acid reflux medicine for a few days before surgery if your child has reflux, order a swallow study, and ask you to stop food and drink for several hours before surgery [1].
Does supraglottoplasty hurt, and what anesthesia is used?
The surgery is done under general anesthesia, so your child is fully asleep. Swelling and discomfort are common in the first few days, and care usually includes pain relievers and anti-reflux medicines given as your surgeon instructs [1].
Related Reading
References
Cleveland Clinic. Supraglottoplasty: Surgery, Recovery & What To Expect. Cleveland Clinic. Last updated August 21, 2024. https://my.clevelandclinic.org/health/procedures/supraglottoplasty
Mills JF, Monaghan NP, Nguyen SA, et al. Characteristics and outcomes of interventions for pediatric laryngomalacia: a systematic review with meta-analysis. Int J Pediatr Otorhinolaryngol. 2024;178:111896. PMID 38364547. https://doi.org/10.1016/j.ijporl.2024.111896
Avillion MP, Neighbors CLP, Biello A, et al. Unilateral vs bilateral supraglottoplasty: a meta-analysis of rates of return to surgery and supraglottic stenosis. Otolaryngol Head Neck Surg. 2019;161(5):742-753. PMID 31184252. https://doi.org/10.1177/0194599819847644
Medical disclaimer
This article is for general education only and does not replace advice from a qualified healthcare professional. Talk to your doctor about your own situation before making decisions about your health. If you think you have a medical emergency, call your local emergency number right away.
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