Ken D. Nguyen, MD · Oct 22, 2026
24-Hour pH Testing: Measuring Acid Reflux
Esophageal pH testing measures how often acid reflux happens and whether it matches your symptoms. Used for heartburn that doesn't respond to medicine and before reflux surgery.
Ken D. Nguyen, MD · Oct 22, 2026
Abdominal Ultrasound: Preparing for Your Test
Abdominal ultrasound uses sound waves to look at the liver, gallbladder, pancreas, and more. No needles or radiation. How to prepare, what to wear, and how long it takes.
Ken D. Nguyen, MD · Oct 22, 2026
Esophageal Manometry: Testing How Your Esophagus Works
Esophageal manometry measures the pressure and coordination of the esophagus muscles. Used for trouble swallowing, achalasia, chest pain, and before reflux surgery.
Ken D. Nguyen, MD · Oct 22, 2026
Flexible Sigmoidoscopy: What to Expect
Flexible sigmoidoscopy examines the rectum and lower colon with a simpler prep than colonoscopy, usually a Fleet enema. Why it's done, how to prepare, and recovery.
Ken D. Nguyen, MD · Oct 22, 2026
Liver Elastography (FibroScan): A Painless Test for Liver Fat and Scarring
Liver elastography (FibroScan) measures liver stiffness and fat in about 10 to 30 minutes, with no needles. Who needs it, how to prepare, and what results mean.
Ken D. Nguyen, MD · Oct 22, 2026
Motility Capsule Test: Measuring How Your Gut Moves
The motility capsule test measures how fast food moves through the stomach, small intestine, and colon. Used for gastroparesis and severe constipation. Prep and what to expect.
Ken D. Nguyen, MD · Oct 22, 2026
Small Bowel Enteroscopy: Looking Deeper Into the Small Intestine
Enteroscopy uses a longer endoscope to examine and treat the small intestine, often for bleeding or anemia found on capsule endoscopy. How to prepare and what to expect.
Ken D. Nguyen, MD · Nov 18, 2023
Capsule Endoscopy (NaviCam® Small Bowel)
Capsule Endoscopy, also called a video capsule endoscopy, is a procedure that uses a small camera inside a capsule to examine the esophagus, stomach, and, most…
Ken D. Nguyen, MD · Jun 21, 2018
Hemorrhoid Banding
Hemorrhoid banding, or hemorrhoid band ligation, is a non-surgical treatment for internal hemorrhoids. It is the preferred treatment option for hemorrhoids that have…
Tim Chen, MD · Jun 21, 2018
ERCP: Endoscopic Retrograde Cholangiopancreatography
ERCP stands for Endoscopic Retrograde Cholangiopancreatography, a highly specialized endoscopic procedure. ERCP helps to diagnose and treat issues in the bile and…
Tim Chen, MD · Jun 21, 2018
Endoscopic Ultrasound (EUS)
An Endoscopic Ultrasound (EUS) uses an endoscopic procedure (a long, finger-width flexible tube with a camera on the end) to view the throat, stomach and small…
Ken D. Nguyen, MD · Jun 20, 2018
Colonoscopy
A colonoscopy is the examination of the large intestine and the distal part of the small intestine using a camera on a flexible tube inserted from the anus performed…
Ken D. Nguyen, MD · Jun 17, 2018
Upper GI Endoscopy
An Upper GI Endoscopy, also called an esophagogastroduodenoscopy (EGD), is a procedure that diagnoses and treats issues in the small intestine, esophagus, and…