What is an Endoscopic Ultrasound (EUS)?

Endoscopic Ultrasound (EUS) is a diagnostic procedure that carries minimal risk. It combines two techniques:

• Endoscopy: Your doctor inserts a thin, lighted tube into your body.
• Ultrasound: High-frequency sound waves are used to create detailed images.

EUS employs a specialized endoscope with an attached ultrasound probe. Our doctors utilize EUS to assess and diagnose disorders in both the upper and lower digestive tracts. The procedure typically lasts between one and two hours, and you can return home afterward.

Why is Endoscopic Ultrasound Performed?

Your doctor may use EUS to assist in diagnosing various digestive disorders. EUS provides detailed images of your internal structures, which can help in:

• Detecting small tumors in the pancreas.
• Staging gastrointestinal cancers to assess their severity.
• Identifying stones in the biliary ducts.

During EUS, your doctor may also perform fine-needle aspiration to obtain a biopsy. A thin needle is threaded through the endoscope to collect tissue samples, which are then sent to a lab for analysis. The biopsy can confirm the presence of cancer or determine if it has spread.

What to Expect During Endoscopic Ultrasound

Before your procedure, you will need to follow specific preparation instructions, which your doctor will discuss with you in detail. These preparations include:

• If undergoing EUS of the upper gastrointestinal tract, refrain from eating or drinking for six to eight hours prior to the procedure to ensure your tract is clear.
• For EUS of the lower gastrointestinal tract, you will need to follow a liquid diet and undergo enema or laxative preparation.
• Inform your doctor of any allergies you may have.
• Follow your doctor’s instructions regarding any prescription medications you take.

On the day of the procedure, arrive one to two hours before your scheduled EUS. Ensure that a responsible adult accompanies you to take you home afterward. Upon arrival, you will register and provide your medical history.

During the EUS procedure:

1. An IV will be inserted into your vein to administer fluids and a sedative.
2. If you are having an upper gastrointestinal tract EUS, your doctor will apply an anesthetic to your throat, as the endoscope will pass through your mouth.
3. The endoscope will be passed through your digestive tract, either through your mouth (for upper gastrointestinal) or your rectum (for lower gastrointestinal).
4. Your doctor will observe the images on a nearby monitor.
5. A biopsy will be performed if necessary.