Endoscopic Ultrasound
Endoscopic Ultrasound (EUS) is a highly specialized, incredibly sensitive diagnostic tool that combines advanced endoscopy with high-frequency sound waves. This allows our team to capture high-quality, detailed images of your digestive tract and surrounding organs to safely screen for hidden gallstones, evaluate potential tumors, and investigate symptoms when other tests are inconclusive.
Why Do We Use EUS?
Because an EUS can "see" beyond the inner lining of your digestive tract, it provides invaluable insights for your care team. We frequently use this advanced technology to:
Evaluate deep-tissue tumors or cysts in the pancreas, bile ducts, and liver.
Detect tiny, hidden gallstones that standard ultrasounds might miss.
Determine the exact stage of a precancerous or cancerous lesion.
Help your medical team decide on the absolute best course of treatment—such as mapping out a surgical plan or deciding when to safely begin chemotherapy.
How to Prepare for Your Procedure
Your safety is our top priority. To ensure the procedure goes smoothly and comfortably, please follow these guidelines:
Medical & Medication Review
Please inform your physician of your complete medical history, especially if you have heart or lung disease, diabetes, or allergies.
Blood Clotting & Tissue Samples: During an EUS, your doctor may perform a routine, minimally invasive tissue sampling called a Fine Needle Aspiration (FNA).
Medications to Note: It is essential to let us know if you have a family history of bleeding disorders or if you take medications that affect blood clotting (such as Coumadin, Xarelto) or platelet function (such as aspirin, Plavix, Advil, Aleve, or other NSAIDs). Do not stop any prescription medication without explicit instructions from our team.
Fasting and At-Home Prep
Upper GI EUS: Your stomach must be completely empty. Please do not eat any solid food for 6 or more hours prior to your appointment, and stop all liquids at least 2 hours before.
Lower/Rectal EUS: If you are having an EUS of the lower digestive tract, you will be given specific instructions to cleanse the area using a mild laxative or enema before arriving.
Arranging a Ride: Because this procedure is performed under sedation administered by an anesthesia professional, you must arrange for a responsible adult to drive you home. You will not be allowed to drive or return to work until the day after your procedure.
How the Procedure is Performed
An EUS is a highly accurate outpatient procedure that typically takes between 30 to 60 minutes, depending on its complexity.
Sedation: Once your IV sedation is started and you are completely relaxed and asleep, the procedure will begin.
The Scope: For an upper GI procedure, your physician will gently guide the specialized ultrasound-endoscope through your mouth and down the esophagus. For a lower GI procedure, a similar slim instrument is introduced via the rectum.
Real-Time Imaging: While your physician views the inner lining of your tract on a high-definition monitor, the ultrasound attachment sends real-time images of the deeper, surrounding tissues to a specialized screen. All findings are carefully recorded.
Advanced Interventions: If a nodule or cyst is found, your doctor can immediately perform an FNA to safely sample cells. In some instances, targeted therapeutic medications can be injected directly into an area (such as during specialized pancreatic treatments).
What to Expect During Recovery
Immediate Results: Once the sedation wears off in our recovery pavilion, you can resume drinking fluids. Before you leave, your physician will meet with you to discuss the initial findings of the procedure.
Biopsy Timeline: If tissue samples were collected via FNA, they will be sent directly to our advanced pathology lab. These detailed results are typically ready and reported to you within a few days.
Resuming Activities: You can return to your normal diet and standard daily routine the morning after your procedure.
Understanding Risks & Your Alternatives
Are There Risks?
An EUS is an exceptionally safe, well-tolerated routine procedure. Complications are incredibly rare—occurring in only about 1 in 2,000 cases for an EUS without a needle biopsy (a safety rate identical to standard, routine endoscopies).
Minor Side Effects: Some patients may experience mild, temporary reactions to the sedation, such as a localized rash, hives, or brief nausea.
Rare Complications: The primary, though highly unusual, risk is a small tear (perforation) in the intestinal wall that could require surgical repair, or minor localized bleeding/infection. Our clinical team takes every advanced medical precaution to prevent these issues.
What Are My Alternatives?
When a specialist suspects an abnormal growth, obtaining a precise tissue sample is required to confirm a diagnosis before any treatment can begin.
EUS vs. CT/Traditional Ultrasound: While CT scans or external ultrasound-guided biopsies work well for masses located close to the skin, an EUS is significantly safer and far more accurate for "deep" tumors (like those in the pancreas or bile ducts). It allows us to glide right next to the target from inside the digestive tract, safely avoiding vital overlying organs and major blood vessels.
EUS vs. Surgery: Surgical biopsies are an alternative, but they are far more invasive, require general anesthesia, involve a hospital stay, and carry a much higher rate of potential complications.