Vacuum bell therapy

The vacuum bell is a non-surgical option for pectus excavatum. It is simple to use, but the results depend almost entirely on consistency — which is exactly what makes it worth tracking.

How it works

A silicone suction cup sits over the sunken part of the chest. A hand pump removes air, creating negative pressure that pulls the sternum and adjoining cartilage forward. Each session temporarily lifts the chest; over months of repetition the chest wall becomes more mobile and the resting depth can genuinely reduce. The device comes in several sizes — a properly fitted bell that covers the dip without pressing on the ribs matters more than pumping harder.

A typical protocol

• Weeks 1–2: 15–30 minutes once a day at low suction, letting the skin adapt.
• Month 1–3: build towards 30–60 minutes, often split into two sessions.
• Ongoing: 1–2 hours a day, most days of the week, continued for 12–24 months or longer.
• Never: sleep with the bell on or push through sharp pain, dizziness or breathlessness.

What results look like

There are two different effects, and confusing them causes a lot of frustration. The immediate response is the lift you see right after a session; it fades within hours and mostly tells you how flexible your chest is. The durable change only shows up in morning measurements taken before treatment, and moves slowly — often a few millimetres over months. Younger users, flexible chests, milder depths and high daily consistency are the factors most associated with better outcomes.

Safety and side effects

Expect some skin redness after each session, and occasionally small bruise-like spots or temporary numbness. Stop and check in with a clinician if you get persistent pain, skin breakdown, rib discomfort or any chest symptoms. People with heart or major vessel conditions, bone fragility, bleeding disorders or certain connective tissue disorders should not start without medical clearance.

What to record each day

1. Morning depth, before treatment, in your usual position.
2. Session duration, and pressure if your pump displays it.
3. An optional post-treatment depth to capture the immediate response.
4. A short note when something is unusual — illness, travel, a skipped day.

Common questions

How does a vacuum bell work?

A silicone cup is placed over the sunken area and a hand pump removes air, creating negative pressure that lifts the sternum and rib cartilage outward. Repeated daily over months, the chest wall gradually becomes more flexible and, in many users, the resting depth reduces.

How long should each session be?

Most protocols start with 15–30 minutes once or twice a day and build up towards one to two hours a day as tolerance improves. Follow the schedule your clinician or device supplier gives you rather than pushing for maximum time immediately.

How long before I see results?

Immediately after a session the chest looks lifted, but that effect fades within hours. Durable change is measured in months: published series report meaningful improvement after 12–24 months of consistent daily use, with better outcomes in younger users and flexible chests.

Is it safe?

Vacuum bell therapy is generally considered low risk. Common side effects are skin redness, small bruises (petechiae), temporary numbness and mild discomfort. It is not suitable for people with certain heart, blood vessel, bone or bleeding conditions — get cleared by a clinician before starting.

What should I track?

Track a morning depth measurement before treatment, the duration (and pressure, if your pump shows it) of each session, and an optional post-treatment reading. The morning number shows durable change; the post-treatment number shows how responsive your chest is right now.

New to the condition itself? Read the pectus excavatum guide.