Dr. Guirl joined Gastroenterology Consultants of San Antonio in 2004 after completing his training at Baylor University Medical Center. Common gastro procedures: - Colonoscopy - Over 45? Let our doctors guide you through this life-saving colon cancer screening. - EGD (upper endoscopy) - Used to diagnose chronic acid reflux. Doctors use a long, flexible tube with a camera on the end to inspect your upper GI tract. Conditions gastro doctors treat include: Abdominal Pain Celiac Disease Crohn's Disease Diarrhea Fatter Liver Disease Gas and Bloating Acid Reflux (Gastroesophageal reflux/GERD) Hemorrhoids Hepatitis C Irritable Bowel Syndrome Liver Cirrhosis Nausea and Vomiting Obesity and the GI tract Pancreatitis Swallowing Disorders