Fasting Before Lung Cancer Surgery (Lobectomy)

Fasting for this procedure

Your lobectomy is done under a general anaesthetic, often with a special tube that lets the surgeon deflate just the operated lung while you breathe through the other one, so your stomach must be empty to protect your airway. Stop all solid food, milk and milky drinks 6 hours before your arrival time (a light meal the evening before is fine), and you may keep sipping clear fluids — water, black tea or coffee, clear juice without pulp — until 2 hours before arrival, after which nothing at all. Your team may give you a carbohydrate drink to finish at the 2-hour mark; if so, follow that timing exactly. For a child having lung surgery, use the 6-4-2 rule (food and formula 6 hours, breast milk 4 hours, clear fluids 2 hours).

Medicines to check

Stopping smoking is the single biggest thing you can do. Even quitting a few weeks before surgery lowers your risk of chest infections, poor wound healing and time on a ventilator; if you smoke, tell your team today so they can help, and do not smoke or vape on the morning of surgery.

Blood thinners need a plan. Drugs like warfarin, apixaban, rivaroxaban or clopidogrel raise the risk of bleeding inside the chest and around the lung, so your surgeon will tell you exactly when to stop each one — never guess. See medications to stop before surgery.

Diabetes medicines change while you fast. Tablets such as metformin and the SGLT2 'flozins', plus insulin doses, are adjusted on the day so your sugar stays safe. Follow the plan in diabetes tablets before surgery.

Take your heart, blood-pressure and breathing medicines as told with a tiny sip of water on the morning of surgery, unless your team has specifically asked you to hold one — inhalers in particular usually continue right up to the day.

Bring every inhaler and spacer with you and keep using them as normal; good lung function on the day genuinely affects how well you do after the operation.

When this surgery may be delayed

A new chest infection, fever or worsening cough — operating on infected lungs is risky, so it is usually rebuilt up first with antibiotics and physiotherapy.

Lung-function or fitness tests (breathing tests, sometimes a walk or cycle test) showing your remaining lung needs optimising before it is safe to remove a lobe.

You have not managed to stop or cut down smoking, or carbon-monoxide breath levels are high, so the team delays to reduce your airway and infection risk.

Blood thinners were not stopped at the right time, leaving your blood too 'thin' for safe chest surgery.

New scan findings that change the plan — for example the cancer looks more extensive and the team needs to reconsider the type or extent of the operation.

Reports & documents to carry

Your admission letter and any pre-assessment paperwork or anaesthetic plan.

Your CT and PET-CT scans, lung-function (spirometry) results and any biopsy or staging reports, or confirmation the hospital already has them.

A full list of your medicines with doses — especially blood thinners, inhalers and diabetes medicines — plus the medicines themselves.

All your inhalers and a spacer if you use one, and your blood-glucose meter if you are diabetic.

Details of who is collecting you and supporting you at home, as you will not be fit to drive after a chest operation.

What to ask your anesthesia team

Will my operation be keyhole (VATS) or will it need an open cut, and could it change to open during surgery?

Exactly how many days before surgery should I stop each of my blood thinners, and do I need bridging injections?

Will I have an epidural or a nerve block for pain relief, as well as the general anaesthetic?

How long will the chest drain stay in, and how many nights should I expect to stay in hospital?

How much of my lung is being removed, and what breathing exercises should I start before I come in?

Your prep checklist

Tick things off as you sort them — saved on this device only, nothing is sent anywhere.

A general guide — your hospital's own instructions always come first.

Frequently asked questions

Why does stopping smoking before a lobectomy matter so much?

Smoking narrows airways, clogs them with mucus and starves tissues of oxygen, so smokers have far more chest infections, ventilator time and wound problems after lung surgery. Stopping even a few weeks beforehand lets your airways clear and your blood carry more oxygen, which genuinely improves recovery. It is never too late to benefit, and your team can offer nicotine replacement and support — just do not smoke or vape on the morning of surgery.

What is a chest drain and how long will it stay in?

After a lobectomy a soft tube is left in your chest to drain air and fluid and let the remaining lung re-expand fully. It connects to a bottle by your bed and is usually removed once the lung has sealed and drainage has settled, often after two to four days, though it can be longer. It can feel odd but is well controlled with pain relief, and getting up and breathing deeply actually helps it come out sooner.

Will the keyhole (VATS) operation hurt, and how is the pain controlled?

Even keyhole chest surgery can be sore because the cuts sit between sensitive rib spaces. To manage this your anaesthetist usually adds an epidural or a nerve block around the chest wall alongside the general anaesthetic, plus regular tablet painkillers afterwards. Good pain control is not just comfort — it lets you breathe deeply, cough and move, which prevents chest infections and helps the remaining lung work well.

How long will I be in hospital after a VATS lobectomy?

Most people having a keyhole lobectomy stay around three to five days, mainly waiting for the chest drain to come out and for breathing and walking to settle. An open operation, or any complication such as an air leak, can mean longer. Starting your breathing exercises and walking on the same or next day speeds things up, so expect the team to get you up and moving very soon after surgery.