Endoscopic ultrasound scan (EUS) and Endobronchial ultrasound scan (EBUS)


With an EBUS or EUS a small device called an ultrasound probe is joined to the top of the endoscope tube. This probe then makes sound waves that gives your doctor a picture of the tissues inside your body.


EBUS uses an ultrasound scan to take pictures inside and outside the lungs. Sometimes it can be used to look at the oesophagus. EBUS can show how big the tumour is, and whether any nearby lymph nodes are enlarged. With EBUS a thin tube is passed down your windpipe through your mouth.


With EUS the probe goes through your mouth and down your oesophagus (foodpipe) to give images of the oesophagus or stomach area (for oesophageal or stomach cancer) or the area around the heart and lungs (for lung cancer). An EUS can show if lymph nodes are enlarged due to cancer or infection. An EUS can also help to find very small cancers.

During the test

The doctor can take biopsy (tissue) samples or nearby lymph nodes by passing a needle through the tube.

Will I have pain relief / anaesthetic?

You will have a sedative injection before the test. You may fall asleep or just feel sleepy and relaxed after the sedative. You will also have an anaesthetic spray on the back of your throat to numb it.

If your doctor recommends you have a general anaesthetic you may have to stay in hospital overnight.

How long does it take?

20-30 minutes

Does it hurt?

You might feel a little discomfort as the tube is inserted, but the sedative should make you feel comfortable. If you have a general anaesthetic you will be asleep during the test.

After the test

  • You cannot eat or drink anything for at least 4 hours after the test. This is because your throat will be numb.
  • You may feel drowsy and sleepy or you may not remember much about having the test, if you were sedated.
  • Once the sedation wears off (about an hour), you can go home. Make sure you arrange for someone to take you home as you’re not allowed to drive for 24 hours after a sedative.
  • You might have a sore throat for a couple of days but this will soon clear up. If not, contact your doctor at the hospital.
  • If you have a general anaesthetic you may be able to go home the same day or you may need to stay in hospital overnight.

For more information

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1800 200 700

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