Medical Oncologist
CION Cancer Clinics
Air leaks after lung surgery, and why some take longer to seal | CION Cancer Clinics
An air leak means air is escaping from the cut surface of the lung into the chest drain. It is common after a lobectomy, and most leaks seal on their own as the lung heals. A leak that carries on longer than expected is called prolonged. It usually means a longer stay or going home with a valve, not a failed operation. This page explains why it happens and what the team does. CION Cancer Clinics’ surgical oncologists in Hyderabad can talk this through with you.
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Medically reviewed by Dr. Muralidhar MuddusettyConsultant Surgical Oncologist · MBBS (AIIMS), MS (Surgery, AIIMS), DNB (Surgical Oncology), MRCS (Edinburgh) · last reviewed September 2026, next review due September 2027
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On this page
- What is an air leak after lung surgery?
- Why do some air leaks take longer to seal?
- What does the team do while waiting for the leak to seal?
- Staying in hospital or going home with a valve: how do they compare?
- What do families worry about when the drain keeps bubbling?
- What can this page not tell you about your own leak?
- Common questions about air leaks after lung surgery
The short answer
What is an air leak after lung surgery?
An air leak is air escaping from the cut edge of the lung into the space around it. The chest drain carries that air away, and in most people the leak seals by itself over the first few days as the lung heals.
Why it happens at all
During a lobectomy or a smaller resection, the surgeon divides lung tissue and closes the edges with staples or stitches. Lung tissue is soft and full of tiny air sacs. Along a long staple line, a few of those sacs can let air seep out, the way a patched tyre can hiss before it settles. Each time you breathe in or cough, a little air slips through.
How you will know there is one
The drain sits in a bottle or a small box beside the bed. When you cough, the nurse watches for bubbles in the water or a reading on a digital meter. Bubbles mean air is still coming out. When the bubbling stops, and a chest X-ray shows the lung is fully up against the chest wall, the team starts to plan taking the drain out.
When it is called prolonged
Surgeons call a leak prolonged when it carries on for longer than they would normally expect after that operation. It is one of the most common reasons for a longer stay after lung surgery. It is uncomfortable and frustrating, but on its own it does not mean the operation went wrong.
Who is more likely
Why do some air leaks take longer to seal?
Most of the reasons are about the lung itself, not the skill of the stapling. Your surgeon weighs these before the operation.
Damaged or thin lung
Lungs affected by COPD or emphysema, where the air sacs have broken down, hold staples less firmly. The tissue heals more slowly and leaks more easily.
Smoking
Current or recent smoking slows healing and leaves the airways inflamed. Stopping before surgery helps, even when the time left is short.
How the lobes are joined
In some people the lobes are partly fused together. The surgeon then has to cut through more lung tissue to separate them, which makes a longer raw surface.
General health
Healing is slower in some situations, and the team plans for them.
Often slower with
- Long-term steroid tablets
- Poor nutrition or recent weight loss
- Diabetes that is not well controlled
Not sure whether this applies to you?
Ask an oncologistOn the ward
What does the team do while waiting for the leak to seal?
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Watching the drain every day
The nurses record the bubbling or the meter reading at each round. You will be asked to cough so they can see whether the leak is getting smaller.
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Chest X-rays
These show whether the lung is staying fully expanded. A small gap of air at the top can be acceptable if you are breathing comfortably.
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Changing the suction
Some teams switch the drain from suction to a simple water seal, or the reverse. Taking suction off can help some leaks close.
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Keeping you moving
Walking, breathing exercises and good pain relief keep the lung open and help the raw surface stick to the chest wall.
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Extra steps if it continues
Options include a small valve on the drain so you can go home, a sealing treatment put into the chest through the drain, or rarely a further operation. The team explains which fits your situation.
Two common paths
Staying in hospital or going home with a valve: how do they compare?
Staying on the ward
Going home with a one-way valve
Drain stays on a bottle or suction by the bed
Drain connected to a small valve or bag you carry
Nurses check the drain several times a day
You return to the clinic for checks and X-rays
Suits people who still need oxygen or close care
Suits people who are walking, eating and comfortable
Harder for families who live far from Hyderabad
Needs someone at home and a way back quickly
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Commonly believed
What do families worry about when the drain keeps bubbling?
"The bubbling means the operation has failed."
Bubbling means the cut surface of the lung has not sealed yet. It does not tell you whether the cancer was removed. That answer comes from the pathology report, which is a separate question.
"Coughing will make the leak worse, so he should not cough."
Coughing helps. It clears phlegm and keeps the lung open so it can press against the chest wall and seal. Holding a pillow against the wound makes it easier.
"She should lie still in bed until it closes."
Lying still lets the base of the lung close down and phlegm settle. Sitting out of bed and short walks, with the drain carried along, are part of how a leak heals.
"A longer stay means something is being hidden from us."
A slow leak is one of the most ordinary reasons for a longer stay. Ask the team to show you the drain reading and the X-ray. Most are happy to explain what they are seeing each day.
!
If you are at home with a drain or valve
Go to the nearest emergency department the same day if breathing suddenly becomes much harder, you have new sharp chest pain, the skin of your chest, neck or face swells and crackles when pressed, or the drain comes out or disconnects. If the tube comes out, cover the hole with a clean dressing and go straight in. Do not try to push it back or wait to see if it settles.
Being straight with you
What can this page not tell you about your own leak?
This page cannot tell you how long your leak will last. That depends on the state of your lung, the operation you had and how it is changing day by day. The surgeon watching your drain is the only person who can judge that.
What to ask the team
Ask whether the leak is getting smaller, and what the X-ray shows. Ask what the plan is if it has not settled by the next review, and whether going home with a valve is an option for you. If you live in a district far from the hospital, say so early. It changes how safe a home plan is.
When a home valve does not suit
Going home with a drain is not right for everyone. It may not suit someone who still needs oxygen, has a large gap of air on the X-ray, has a fever, lives alone or cannot get back quickly. The team may prefer to keep you in, even if that feels slower.
None of this changes the result of the cancer operation. The pathology report is discussed separately.Questions we are asked
Common questions about air leaks after lung surgery
Is an air leak after lobectomy normal?
A small air leak in the first days is very common after any operation that cuts lung tissue. It is one reason a chest drain is used at all. It becomes a concern only if it goes on longer than expected, or if the lung does not stay expanded on the X-ray. Your team watches for both every day.
Does a prolonged air leak mean the surgeon made a mistake?
Not usually. Most prolonged leaks come from the lung itself, such as emphysema, smoking damage or lobes that were fused together. Even with careful stapling, fragile tissue can seep air. If you have questions about what happened in theatre, ask the surgeon directly. It is a fair question and deserves a clear answer.
Can I go home with the chest drain still in?
Sometimes. If you are comfortable, walking and eating, and the lung is staying up on the X-ray, the team may fit a small one-way valve or portable bag. You then come back to clinic for checks. It is not suitable for everyone, and the decision rests with the team caring for you.
Will the leak damage the rest of my lung?
A leak that is being drained properly does not harm the remaining lung. The drain is there so air cannot build up around it. What matters is keeping the lung expanded, which is why breathing exercises, coughing and walking are encouraged even while the drain is still bubbling.
Does a longer stay cost more?
Usually, yes, because each extra day adds ward charges and tests. How much you actually pay depends on your package and your cover. Aarogyasri, CGHS, ECHS, EHS and cashless insurance may cover much of it. Ask the billing desk early how extra days are handled under your scheme.
Is it safe to travel home to the district with a drain?
Flying with a drain, or with a leak that has not sealed, is not advised, because pressure changes affect air in the chest. Long road journeys need the team's approval first, and you should know which hospital near home you would go to if something changed. Ask before booking any travel.
What can I do to help the leak close?
Take the pain relief you are offered so you can breathe deeply and cough. Do your breathing exercises and walk as the physiotherapist suggests. Eat and drink well. Do not smoke, including bidis. Keep the drain bottle below the level of your chest and never disconnect it yourself.
Will I need another operation?
Most people do not. The large majority of leaks close with time, patience and simple measures on the ward or at home with a valve. A small number need a sealing treatment through the drain or a return to theatre. If that is being considered, the surgeon will explain why and what it involves.
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Dr. C. Raghavendra Reddy
MBBS(Gold Medal), DNB(General Medicine), DM(Medical Oncology)(Gold Medal)
Medical Oncologist
Dr. Bharati Devi Gorantla
MBBS, MD(General Medicine), DM(Medical Oncology)(Adyar,Chennai), ECMO, MRCP SCE(UK)
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Dr. Owais Mohammed
MBBS, MD (General Medicine), DrNB (Medical Oncology), ECMO, MRCP SCE (Medical Oncology) (UK)
Medical Oncologist
Medical Oncologist
Surgical Oncologist
Dr. Muralidhar Muddusetty
MBBS (AIIMS), MS (Surgery) (AIIMS), DNB (Surgical Oncology), MRCS (Edinburgh)
Surgical Oncologist
Surgical Oncologist
Surgical Oncologist
Dr. Vinay Mamidala
MBBS, MS(General Surgery), M.Ch(Surgical Oncology), FMAS, FARIS(Ongoing)
Surgical Oncologist
Radiation Oncologist
Radiation Oncologist
Radiation Oncologist
Hematologist
Surgical Oncologist
Dr. Vajja Sandeep Kumar
MBBS, MS (General Surgery), DrNB (Surgical Oncology), FALS Oncology
Surgical Oncologist
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Sources
- Cancer Research UK — Surgery for lung cancer
- American Cancer Society — Surgery for non-small cell lung cancer
- NHS — Lung cancer: treatment
- Macmillan Cancer Support — Lung cancer
This page is general information, not a prescription. Do not change or stop any treatment based on what you read here. If anything is worrying you, contact your own treating team — or call our helpline and we will help you reach the right specialist.
Keep reading
Related pages
The Chest Drain After Lung SurgeryHow the drain works and how it comes outBreathing Exercises After Lung SurgeryThe exercises that help the lung stay openRecovery Timeline After Lung SurgeryWhat the weeks after the operation usually look likeComplications and Red FlagsWarning signs after any cancer operation
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