Before your operation
This page gives you general information about what happens before an operation. There are sections about
What surgery will be like for you depends on a number of factors including
- Your type of cancer
- The type of operation you are having
- Your general health
You may have surgery as an outpatient (day surgery) or may stay one or more nights in hospital as an inpatient. It depends on the type of surgery you are having. Staying in hospital means that the staff can keep an eye on you and monitor your recovery.
People are often told that they need to have surgery but then have to wait a few weeks to have the operation. This can be a difficult time emotionally. But it does give you time to prepare yourself and have any tests you may need beforehand. For some people it is also a chance to sort things out at home or work.
Knowing what to expect can help you to prepare and recover. Most people feel anxious before an operation. Finding out about it can help you cope. So
- Ask your doctors and nurses lots of questions
- Be sure about what you need to do before the operation and what to expect afterwards
- Get things ready to go in to hospital, such as nightwear, books, music, magazines, etc
- Try relaxation techniques - these can be good if you are nervous
- Try to stop smoking as it will help your recovery if you do
Below is a 360° photograph of an operating theatre. If you can't see the photograph, you can download the Adobe Flash Player from the Adobe website. Use the arrows to move the picture and look around the room.
Most people are admitted on the day of their operation or the day before. There are a number of things to do, including having tests to check your general health, meeting the people who will look after you and signing the consent form. These are discussed below.
Before any operation you need to have some tests to make sure you are well enough to have the anaesthetic and operation. These may include
Blood tests
You will have a full blood count to check that you are able to fight infections, that your blood can clot normally and that you aren’t anaemic. Blood tests can also check how well your liver and kidneys are working. You may have your blood type checked in case you need a transfusion during the operation.
Urine tests
You may be asked to give a urine sample so that the nurse or doctor can check that your kidneys are working normally and check for infections.
Chest X-ray
A chest X-ray shows how well your lungs are working and checks for infections.
Electrocardiogram (ECG)
An electrocardiogram checks how well your heart is working. This is the test where you have small sticky pads put on your chest that are attached to wires. It shows your heart beat as an electrical trace on a screen.
Other tests
You may need other scans or X-rays to check the position and size of your cancer and whether it has spread. Exactly what you need depends on the type of cancer you have. We have a section about cancer tests. You can also find more information about tests in the section about your cancer type.
Before your operation, as well as meeting the surgeon, you will meet the anaesthetist who will be responsible for your welfare during the operation and your pain control afterwards. The anaesthetist will examine you and ask questions about your medical history and any operations you have had in the past.
When you go for your operation you will also meet the theatre nurses. They look after you
- While you are having your anaesthetic
- During the operation
- When you first come out of the operating room before going back to the ward
You may also meet the physiotherapist, who will teach you about breathing and leg exercises you may need to do after your operation. The exercises reduce your risk of chest infections and blood clots that can develop if you don’t move around for a while.
Before you have any operation you need to sign a consent form. This is a written agreement between you and the surgeon saying that you give permission for them to do the operation.
Before you sign it your surgeon should explain
- Why you need the operation
- Whether you have any other treatment options
- What the aim of the surgery is
- How they are going to do the surgery
- Any risks there may be
- Possible side effects of the surgery and whether they are short or long term
The meeting with the surgeon is your chance to ask questions about the operation. Having someone with you can help you understand and remember what the surgeon says. You should only sign the consent form once you understand fully about the operation.
Just before the operation you
- Stop eating for about 6 hours and drinking clear fluids for about 2 hours - it may be shorter or longer depending on your particular operation
- Change into a hospital gown
- Take off jewellery and make up (including nail varnish)
- Remove contact lenses and false teeth - usually you can keep them in until you get to the anaesthetic room and the theatre nurse will put them back in before you go back to the ward after your surgery
For some operations, part of your body may need to be shaved. The nurse may do this on the ward. Or they may do it when you are asleep in the operating room.
You may need to have specific preparations for some types of operation. For example, before bowel surgery, your doctor may want to make sure your bowel is empty. This usually means following a specific diet for a few days and taking medicines to completely clear the bowel. Your nurse or surgeon will give you any instructions you need.
An hour or so before you go to the operating theatre, your nurse may give you a tablet or injection to help you relax. This may make your mouth feel dry. But you can rinse your mouth with water to keep it moist.
You have an anaesthetic so that you can’t feel anything during the operation. Your ward nurse and a porter will take you down to the anaesthetic room, next to the operating theatre. All the doctors and nurses will wear theatre gowns and may also wear hats and masks. This reduces the chance of you getting an infection.
The anaesthetist may put a small tube into a vein in your arm (cannula) so that you can have any fluids and medicines you need during the operation.
There are different types of anaesthetics. You may have a
- Local anaesthetic - the anaesthetist injects anaesthetic to numb the part of your body to be operated on
- Regional anaesthetic - the anaesthetist numbs a large area or part of your body - for example, using an injection into your spine (epidural) to numb your lower body
- General anaesthetic - you are ‘asleep’ during the operation
With local and regional anaesthetics you may take a tablet to help you to relax as well as the injection to numb the area. You will be awake during the operation but may feel sleepy. Your doctor may suggest a regional anaesthetic if you are not fit enough for a general anaesthetic.
You may have general anaesthetics either as an injection of drugs into a vein in your arm or by breathing in gases through a mask. These both make you go into a deep sleep and when you wake up, the operation will be over.









