Medical Specialty >> Gastroenterology

Doctors Lounge - Gastroenterology Answers

Back to Gastroenterology Answers List

If you think you may have a medical emergency, call your doctor or 911 immediately. Doctors Lounge ( does not recommend or endorse any specific tests, physicians, products, procedures, opinions, or other information that may be mentioned on the Site.

DISCLAIMER: The information provided on is designed to support, not replace, the relationship that exists between a patient/site visitor and his/her physician. Please read our 'Terms and Conditions of Use' carefully before using this site.

Date of last update: 10/15/2017.

Forum Name: Liver Diseases

Question: RUQ Ultrasound

 rswaney - Tue Dec 27, 2005 8:04 pm

I'm scheduled for an RUQ Ultrasound to check for liver problems.

Why can't I eat or drink anything after midnight?

I especially don't understand why I can't drink water?

Thank you,
 MaryAnn N, RN - Sun Feb 26, 2006 2:55 pm

User avatar Hi Russ,

The reason you cannot eat or drink anything is because when food/liquid enter your stomach sends a signal to start secretion of enzymes used to aid digestion. When this occurs bile gases are produced. Bile gases crowd the abdominal area/organs. This inhibits visualization of your organs during an ultrasound.

Hope this answers your question.

MaryAnn RN

| Check a doctor's response to similar questions

Are you a Doctor, Pharmacist, PA or a Nurse?

Join the Doctors Lounge online medical community

  • Editorial activities: Publish, peer review, edit online articles.

  • Ask a Doctor Teams: Respond to patient questions and discuss challenging presentations with other members.

Doctors Lounge Membership Application

Tools & Services: Follow DoctorsLounge on Twitter Follow us on Twitter | RSS News | Newsletter | Contact us