Vacuum Bell Therapy for Pectus Excavatum: Does It Really Work?
In short: for the right patient, vacuum bell therapy can noticeably improve a sunken chest without surgery. It is not a quick fix, it works best in tamariki and teenagers whose chest walls are still flexible, and results vary. Here is what the research shows, who benefits most, and how it compares with surgery.
What Is Pectus Excavatum?
Pectus excavatum – “sunken chest” or “funnel chest” – is the most common chest-wall difference, where the breastbone sits deeper than the surrounding ribs. It affects roughly 1 in 300 to 1 in 1,000 people and is several times more common in boys. Most families first notice it during the adolescent growth spurt. Many cases are mild and cosmetic, but deeper depressions can affect breathing during sport – something young people in an active, outdoors country tend to notice – and a teenager’s confidence.
How Vacuum Bell Therapy Works
The device is a silicone cup connected to a hand pump. Placed over the chest, the pump removes air to create suction that gently lifts the sternum outward. Worn daily – from a few minutes building up to an hour or more, over months to years – the repeated lifting may encourage a flexible chest wall to gradually remodel into a flatter shape. It has been in use since the early 2000s as a conservative alternative to surgery.
What the Research Shows
The evidence is encouraging but still developing. A long-term study of more than 250 patients found around 52% achieved meaningful improvement, with better outcomes among consistent, longer-term users. Among committed multi-year users, roughly 25% achieved an excellent correction and a further 18% a good one. Age matters most: starting before about age 11 tends to give the best response, because younger chest walls are more pliable. Reviews generally describe it as safe and cost-effective for selected patients, while calling for larger trials.
Who Gets the Best Results?
It does not suit everyone equally. The strongest candidates tend to share a few traits:
- Children and teenagers with flexible chest walls, ideally starting before age 11
- Mild to moderate depressions rather than very deep or markedly asymmetric ones
- A realistic willingness to wear the device daily over an extended period
- Good supervision and a steady routine, ideally paired with posture and breathing work
Vacuum Bell vs Surgery (the Nuss Procedure)
For some patients the device improves the chest enough that surgery is no longer needed. With milder pectus often considered cosmetic in the public system, many Kiwi families value a conservative option they can start sooner. The Nuss procedure remains the more reliable structural correction when the depression is severe or affects heart or lung function. The two are different tools for different severities, and the right choice depends on an individual assessment.
The ScolioLife Approach: More Than the Device
At ScolioLife, we treat the chest wall as part of your whole posture, not an isolated dent. A vacuum bell works best when it is fitted properly, used on a sensible progressive schedule, and combined with breathing exercises and postural correction. We help patients choose a suitable vacuum bell system and use it safely, and New Zealand patients can begin with an online consultation before deciding whether to fly to one of our clinics in Singapore, Kuala Lumpur or Surabaya. Our guide to pectus excavatum, posture and rounded shoulders and our overview of non-surgical pectus excavatum correction explain how it fits together. Every case is different, and individual results vary.
Frequently Asked Questions
How long until I see results? Most people use the device daily for many months before changes settle, and full programmes often run one to several years. Early, consistent use brings the best response.
Does it hurt? It should feel like firm suction, not pain. Mild redness, a temporary skin ring, or minor bruising can occur and usually fade. Build up wearing time gradually rather than over-tightening.
Is there an age limit? Younger, more flexible chests respond best, but motivated teenagers and some adults can still improve, just more slowly.
Can adults use it? Yes, though a stiffer adult chest wall responds less readily, so results are slower and more modest. An assessment helps set realistic expectations.
Take the First Step
If you or your child has a sunken chest, an early assessment helps clarify whether vacuum bell therapy is a sensible option and what results are realistic. Get in touch with the ScolioLife team for an online or in-person evaluation. Every chest is different and should be individually assessed.