Medical Oncologist
CION Cancer Clinics
Being on a ventilator after cancer surgery | CION Cancer Clinics
After most cancer operations the breathing tube comes out before you are fully awake. When a ventilator is kept on after surgery, it is often for some hours or overnight while the body settles. A longer time usually means the lungs need more help. This page explains why it is used, how people come off it, and what families will see. CION Cancer Clinics’ surgical oncologists in Hyderabad can talk this through with you.
MI
Medically reviewed by Dr. Mohammed ImaduddinConsultant Surgical Oncologist · MBBS, MS (General Surgery), MCh (Surgical Oncology) · last reviewed September 2026, next review due September 2027
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On this page
- How long do people stay on a ventilator after surgery?
- How does someone come off the ventilator?
- What is it like to be on a ventilator?
- What tends to make ventilation shorter or longer?
- What happens after the breathing tube comes out?
- What do families wrongly believe about ventilators?
- What do the ventilator words mean?
- Common questions about ventilators after surgery
The short answer
How long do people stay on a ventilator after surgery?
After most cancer operations the breathing tube comes out in the theatre or recovery room, before you are fully awake. When a ventilator is planned for longer, it is often only for some hours or overnight, and a longer time usually means the lungs or the body need more help to recover.
Why a ventilator is used after surgery
A ventilator, or breathing machine, pushes air and oxygen into the lungs through a tube in the mouth or nose. After a very long or major operation the team may keep it on while the anaesthetic wears off, the body warms up and blood pressure settles. It gives the heart and lungs a rest during that time.
When it takes longer
A longer stay on the machine is more likely after operations on the chest or food pipe, after large head and neck surgery where the airway is swollen, in people with existing lung disease, or if a chest infection or another complication develops. Each day the team checks whether the body is ready to breathe alone.
What this page cannot tell you
No page can tell you how long your own family member will need the machine. The ICU doctor sees the readings and the chest X-ray every day, and is the right person to ask what they are waiting for.
Weaning
How does someone come off the ventilator?
Sedation is lightened
The medicines keeping the person asleep are reduced so they can wake, follow simple instructions and cough. This can take a little while.
The machine does less
The ventilator is set to give less support, so the person does more of each breath themselves. The team watches oxygen level, breathing rate and effort.
A breathing trial
The person breathes almost on their own through the tube for a period. If they stay steady and comfortable, the team plans to take the tube out.
The tube comes out
The throat is gently cleared, the tube slides out in a few seconds, and an oxygen mask goes on. Coughing and a hoarse voice afterwards are normal.
Not sure whether this applies to you?
Ask an oncologistAt the bedside
What is it like to be on a ventilator?
What the patient feels, and what the family sees, is often quite different.
Sleep and sedation
Most people are given medicine to stay sleepy and comfortable while the tube is in. Many remember little of it later, or remember vivid dreams.
Not being able to speak
The tube passes between the vocal cords, so talking is not possible. An awake person can nod, squeeze a hand, point to letters or write on a board.
Suction and mouth care
Nurses regularly clear phlegm from the tube with a thin suction catheter. It makes the person cough and can look upsetting, but it keeps the airway open.
Soft ties or mittens
A confused person may try to pull the tube out, which can be dangerous.
Families can help by
- Speaking calmly and saying where they are
- Asking when the ties can come off
- Not loosening anything themselves
Side by side
What tends to make ventilation shorter or longer?
Tends to be shorter
Tends to be longer
Ventilator kept on only while the anaesthetic wears off
Ventilator needed because of a chest infection or fluid on the lungs
Healthy lungs and heart before surgery
Chronic lung disease, heart disease or heavy smoking
Operation away from the chest and airway
Surgery on the chest, food pipe, or a swollen mouth and throat
Recovery going as planned
Bleeding, a leak or a return to theatre
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Afterwards
What happens after the breathing tube comes out?
Most people breathe with an oxygen mask or nasal tubes for a while, cough up phlegm and have a sore throat and a croaky voice. Both usually improve over the next few days.
Eating and drinking again
The throat muscles can be weak after a breathing tube, especially if it was in for some time. The team may check swallowing before allowing food or drink, so nothing goes down the wrong way into the lungs. Do not give water until the nurse says it is safe.
If a tracheostomy is suggested
When breathing support is likely to be needed for a long time, the team may suggest a tracheostomy. This is a short tube placed through the front of the neck into the windpipe. It is more comfortable than a mouth tube, needs less sedation and helps with weaning. It is often removed once breathing recovers, and the hole usually closes on its own.
Memories and feelings later
Some people have nightmares, low mood or gaps in memory after time on a ventilator. Tell the team at follow-up. It is common, and support helps. Family can help too. A simple diary of what happened each day in the ICU, kept by a relative, often helps a person make sense of the gaps once they are home.
Commonly believed
What do families wrongly believe about ventilators?
"Once someone goes on a ventilator, they never come off."
After planned surgery, most people come off the ventilator once the anaesthetic has worn off and the body has settled. The machine is support while the body recovers, not a last step.
"The ventilator is doing all the breathing, so the lungs will forget how."
Modern ventilators can let the person breathe with them, and the support is reduced as strength returns. Longer stays do weaken breathing muscles, which is why physiotherapy begins early.
"He is in pain but cannot tell us."
ICU nurses look for signs of pain such as a rising pulse, frowning or restlessness, and give pain relief even when the person cannot speak. If you think he looks uncomfortable, tell the nurse.
"A tracheostomy means the cancer has spread to the throat."
A tracheostomy is usually about breathing support, not the cancer. Ask the team to explain the reason for your family member.
In the ICU
What do the ventilator words mean?
- Intubated
- A breathing tube has been placed in the windpipe, usually through the mouth.
- Weaning
- Gradually reducing the machine's support until the person breathes on their own.
- Extubation
- Taking the breathing tube out.
- Sedation
- Medicine that keeps a person sleepy and calm while the tube is in.
- Tracheostomy
- A breathing tube placed through the front of the neck, used when support may be needed for longer.
- Re-intubation
- Putting the tube back in when breathing alone proves too hard. It happens sometimes and does not mean failure.
Questions we are asked
Common questions about ventilators after surgery
Can my mother hear us while she is on the ventilator?
She may. People who are sedated sometimes hear voices even when they cannot respond, and later remember a familiar voice. Speak to her calmly, tell her who you are and that she is being looked after. Avoid talking about worries or money at the bedside.
Does being on a ventilator hurt?
The tube is uncomfortable rather than painful for most people, which is one reason sedation and pain relief are given. Suction and coughing can be unpleasant for a moment. If your family member looks distressed, tell the nurse, who can check comfort and adjust medicines.
Why was he put back on the ventilator after coming off?
Sometimes a person tires, cannot clear phlegm or struggles with oxygen after the tube comes out, and it has to go back in. It is disappointing but not rare. Ask the ICU doctor what caused it and what they will do differently before the next attempt.
Will the tube damage his throat or voice?
A sore throat and hoarse voice are common and usually settle within days. Longer-lasting voice or swallowing problems are less common and more likely after a long time with the tube in. Tell the team if the voice has not improved before discharge.
Can we decide when to take her off the ventilator?
Coming off the ventilator after surgery is a medical judgement based on readings and tests, made by the ICU team. You can and should ask what they are watching for and what the plan is. Wider decisions about the aims of care are made together with the family.
Is a ventilator stay covered by insurance or Aarogyasri?
ICU care and ventilator support linked to an approved operation are usually part of the package under Aarogyasri, CGHS, ECHS, EHS and cashless insurance. Limits differ between policies and schemes. Ask the insurance desk to check early if the stay is becoming longer than planned.
Why do they keep taking chest X-rays?
A chest X-ray shows where the breathing tube and lines sit, and whether there is fluid, collapse or infection in the lungs. It helps the team decide when the lungs are ready to work alone. The amount of radiation from a chest X-ray is very small.
Will he remember being on the ventilator?
Many people remember very little, because of the sedation. Some remember strange dreams, or feel frightened afterwards. Explaining gently what happened, once he is ready, often helps. If the memories stay distressing, mention it to the doctor at follow-up.
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Sources
- NHS — Intensive care
- NHS — General anaesthesia
- Cancer Research UK — Surgery for cancer
- American Cancer Society — Cancer surgery
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
Why Some Patients Go to ICU After SurgeryThe reasons an ICU bed and breathing support are plannedMonitors, Alarms and What They MeanWhat the ventilator and monitor alarms are telling the nurseBreathing Exercises and Spirometry After SurgeryHow to rebuild breathing strength once the tube is outAnaesthesia for Cancer SurgeryHow the breathing tube is used during the operation itself
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