Impendance Probe Study

What is an Impedance study?  

This new technology allows us to further evaluate the esophagus (feeding tube in the chest) when patients have symptoms that may or may not be related to acid reflux. This will help your doctor determine the cause of your symptoms.  There are other movements of air/gas and liquid (or a mixture) within the esophagus that may give you symptoms but are not caused by acid reflux. Impedance testing can tell us whether it is that (or acid reflux) that is causing your symptoms.

How is the Impedance study performed?

This test involves placement of a soft catheter/tube through the nose and down into the esophagus. The nurse then asks you to take 10 swallows of water. After that you leave the Endoscopy suite with the catheter/tube taped in place and you return the next day for removal of the tube and to bring back the recording device.

What preparation is required?

You may have a very light meal and/or just liquids up until 4 hours before your appointment but then you should not eat or drink anything for 4 hours before your appointment. You may take your usual morning medications. You should remain on all your usual medications before and during the test.

What should you expect during and after the procedure?

A thin flexible tube is lubricated and then gently passed through a nostril down to the correct level in the esophagus. You may experience gagging or coughing briefly during the insertion of the tube but it will soon pass. You will leave the Endoscopy suite with a tube coming out of your nose (and taped across your cheek).

How does it work?

You will carry a recording device with you and you will receive instructions on how to use that. The messages from the Impedance catheter/tube are sent to the recording device and after you return to the Endoscopy suite we remove the tube and download the information from the recorder into the computer for the doctor to review.

What will you need to do?

We ask that you carry on with a normal day including eating and drinking normally as well as participating in your usual activities. We do not want you to avoid things that usually make you have your typical symptoms. You should stay on all your medications.

Your doctor will be sent the results of your study.