AUSTRALIA'S LEADING SPECIALIST IN KLOBE VACUUM BELL TREATMENT
Pectus Excavatum: Causes, Timing, and Care
Pectus Excavatum (sunken chest) is the most common congenital chest wall deformity, occurring in approximately 1 in 400 births. While often viewed as a purely cosmetic issue, clinical research shows it can lead to decreased cardiopulmonary function, physical discomfort, and significant psychological distress during adolescence.
At the Pectus Centre, we advocate for Early Non-Surgical Intervention. Using the Eckart Klobe Vacuum Bell, we provide a proactive alternative to the traditional "Watch and Wait" approach.
What Actually Causes It?
Many parents ask us this early on: why did this happen to my child? For a long time, doctors didn't have a very good answer.
The earliest theory, first suggested over 400 years ago, blamed a shortened diaphragm pulling the breastbone inward. This idea persisted for much of the 20th century — surgeons even tried surgically releasing the diaphragm to fix it. It didn't work, and by the 1960s the theory was abandoned.
Today, the leading explanation points to the rib cartilage itself. Researchers believe this cartilage doesn't grow or behave quite the way it should during childhood — and when actual cartilage samples have been tested in the lab, they've measured real differences: cartilage from children with PE consistently needs less force to bend, stretch, or compress before it gives way, compared with typical cartilage. This matters because it helps explain why gentle, sustained pressure works so well — if the cartilage is genuinely more pliable during the growing years, a device applying steady outward pressure can gradually reshape it, rather than needing surgery to force a rigid structure into place.
It's worth being upfront that researchers don't fully agree on the details — some studies point to the cartilage overgrowing, others to it simply being weaker, and a few newer studies suggest the rib bone itself may be involved rather than the cartilage. No single theory fully explains it yet; most researchers believe it's a combination of factors during growth.
Does It Run in Families?
Often, yes — as many as 4 in 10 cases cluster in families, most likely following a recessive inheritance pattern. Reassuringly, the large majority of cases occur on their own without any wider genetic condition, though in a small number of cases PE can appear alongside connective tissue conditions such as Marfan syndrome — one reason a preliminary medical check is a sensible first step.
The Timing Gap: Why Surgeons Wait
A common experience for parents of younger children (ages 8–12) is being told by a thoracic surgeon that it is "too early" for the Nuss Procedure.
The Clinical Reason:
Leading surgical guidelines, including those by Nuss and Kelly (2014) and Pilegaard (2015), recommend that the Nuss Procedure be delayed until the adolescent growth spurt (typically ages 15–16).
- Risk of Recurrence: Operating on a child whose chest wall is still significantly growing increases the risk of the deformity returning.
- Thoracic Dystrophy: Very early surgery (pre-puberty) can occasionally interfere with chest wall growth, leading to restricted lung capacity.
This lines up with what the causes research above tells us: the deformity is often present in a mild form from early childhood but progresses fastest during the pre-adolescent growth spurt, then stabilises once skeletal growth is complete. If the underlying issue really is about how the cartilage responds during growth, that's consistent with acting non-surgically during the growing years — while the cartilage is still developing and most responsive — rather than waiting until growth has finished.
For many families, "waiting" for the growth spurt means watching the deformity worsen during a time when a child's self-esteem is most vulnerable. This is where Vacuum Bell therapy changes the roadmap.
The Vacuum Bell: A Proactive First-Line Treatment
Rather than waiting for the deformity to become rigid or severe enough for surgery, the Vacuum Bell allows for immediate intervention.
1. The "Bridge" to Correction
A landmark study by Haecker and Sesia (2016) published in the Journal of Pediatric Surgery identifies the Vacuum Bell as a valuable first-line treatment. They found that:
In many patients, the Vacuum Bell completely corrects the deformity, removing the need for surgery entirely.
In more severe cases, using the Vacuum Bell during the "waiting years" improves chest wall flexibility, making a future Nuss Procedure safer and more effective.
2. High Success Rates in Adolescents
Research from the Children's Hospital of The King's Daughters (CHKD) confirms the effectiveness of this approach. Obermeyer et al. (2018) found that 80% of patients showed significant improvement in their pectus depth after consistent Vacuum Bell use, with the ages 10–14 representing the "golden window" for non-surgical success.
Supported by Clinical Evidence
Our protocols are built on three decades of peer-reviewed research:
- Evidence on Safety: Haecker (2011) demonstrated in a study of 133 patients that the Klobe Vacuum Bell is safe and well-tolerated, with no serious adverse effects under clinical supervision.
- Evidence on Depth Reduction: Luo et al. (2021) confirmed via CT imaging that vacuum therapy significantly reduces the Haller Index.
- Evidence on Psychological Impact: Research consistently shows early correction significantly improves quality of life and body image (Steinmann et al., 2011).
- Evidence on Monitoring: A 2026 study validated the External Haller Index — measured via 3D scanning rather than X-rays or CT — against the traditional CT-based index in over 80 adolescents, confirming excellent reliability and diagnostic accuracy. This adds further independent support for the radiation-free monitoring approach we use at Pectus Centre.
Don’t Just "Watch and Wait"
If your child has been told they are too young for surgery, now is the ideal time to start Vacuum Bell therapy. By acting while the chest wall is flexible, you may avoid the need for the operating theatre entirely.
Pectus Excavatum 3D Scanning Assessments
