Lower Endoscopic Ultrasound with Fine Needle Aspiration
Patient Procedure Instructions
Purpose of Procedure
To examine tumor or polyp in greater detail by analyzing each of the 5 wall layers of rectum or colon by using a small ultrasound probe which is passed from the rectum to the area of interest. Standard colonoscopy can only visualize the first layer and miss what is hiding beneath. EUS also provides much higher resolution images than CT scans or MRI’s and better assessment of small lymph nodes outside of the intestines. Surrounding organs such as the prostate, seminal vesicles, vagina, uterus, bladder, and blood vessels can also be analyzed. Biopsies can be obtained for diagnosis.
Preparation for the Procedure
Purchase Over-the-counter
- 1 - 10 oz bottle magnesium citrate (laxative)
- 1 - Fleet enema
One Day Prior To Exam
- Take 1/2 bottle (5oz) of citrate of magnesia (laxative) at approximately 3:00 p.m.
- Eat only clear liquids for dinner.
- After midnight, do not eat or drink anything except medications with a small sip of water.
On The Day Of Your Exam
- Use the fleet enema (follow instructions on the box) first thing in the morning when you wake up (allow yourself time to get to your appointment).
