How long does the capsule sponge test take?
The capsule sponge test takes around 10 minutes in total. You will be asked not to eat or drink for 4 hours before the test. However, it is okay to take any daily medication with water.
Are there any side effects from the test?
Over 15,000 people have had the capsule sponge test with no serious side-effects. Swallowing the capsule is not painful and most people easily swallow it.
The most common complaint is a mild sore throat for 24 hours after the test. For some people, this may last a few days. Over the counter painkillers, for example paracetamol, and throat lozenges will soothe this and it will get better on its own.
There is a very small risk (less than 1 in 2,000) that the sponge comes off the string or the nurse is unable to remove it. If this happens, it will be removed within 4-6 hours by an endoscopy.
There is a very small risk of bleeding in the oesophagus. If this happens, the GP or clinic nurse will check the bleeding. This is likely to stop quickly on its own. If needed, this will also be treated during an endoscopy.
After the capsule sponge test, most people can carry on with their day as normal.
How are the samples tested?
The sample of cells are sent to a laboratory for testing. Experts use special stains to treat the sample and look for signs of cell changes. If cell changes are found, endoscopy can be offered to confirm if any health problems are present.
What is an Endoscopy?
An endoscopy is an exam where a doctor uses a small camera on a long thin flexible tube to look inside the body. For patients with heartburn and related conditions, endoscopy is used to check the throat, oesophagus (food pipe), and the stomach. The camera is passed into the mouth and down the throat, usually while the patient is sedated. Endoscopies are mostly carried out at endoscopy units in hospitals. The patient can usually go home the same day.
This video from Cancer Research UK explains more.
