Dr. Émilie St-Onge – Gastroenterologist | Trois-Rivières, QC

Dr. Émilie St-Onge is a dedicated Gastroenterologist specializing in the diagnosis and treatment of a wide array of disorders affecting the digestive system in adult patients, and may also see older adolescents for certain conditions. Practicing at CSSSTR-centre hosp. rég. de Trois-Rivières in Trois-Rivières, QC, she is a key member of the local medical community. She provides comprehensive care for a wide range of digestive system disorders, including conditions affecting the esophagus, stomach, intestines, liver, and pancreas, utilizing diagnostic and therapeutic endoscopy. Her practice is committed to offering patient-centered digestive health care, emphasizing a multidisciplinary approach to optimize outcomes and enhance quality of life.

Dr. St-Onge holds a Medical Degree from a recognized institution and has accumulated over 9 years of experience as a Gastroenterologist since 2015. She has completed extensive post-graduate training and holds the necessary certifications to practice Gastroenterology (Comprehensive Care for Digestive System Disorders) in QC, adhering to the standards set by the Collège des médecins du Québec (CMQ). Her credentials ensure a high level of expertise in the field, enabling her to deliver evidence-based, safe, and effective care.

Her clinical philosophy centers on evidence-based digestive health care, patient education regarding gastrointestinal conditions and lifestyle modifications, early and accurate diagnosis through advanced procedures, and the development of personalized treatment plans tailored to each patient's unique needs. Dr. St-Onge is dedicated to providing compassionate and comprehensive care to her patients in Trois-Rivières. She speaks French fluently and is committed to fostering a supportive environment where patients feel heard, informed, and actively involved in their health journey.

Dr. Émilie St-Onge diagnoses and treats a wide range of digestive system disorders, including:

Functional Gastrointestinal & Motility Disorders

• Chronic Idiopathic Constipation (CIC) & Opioid-Induced Constipation (OIC): Persistent constipation that does not have an identifiable underlying cause (CIC) or is a side effect of opioid medications (OIC).
• Pelvic Floor Dysfunction & Anorectal Disorders (e.g., Dyssynergic Defecation): Inability to correctly relax and coordinate pelvic floor muscles to facilitate a normal bowel movement, often requiring specialized testing like anorectal manometry and biofeedback therapy.

Liver, Gallbladder, Bile Duct & Pancreatic Disorders

• Non-Alcoholic Fatty Liver Disease (NAFLD) & Non-Alcoholic Steatohepatitis (NASH): A spectrum of conditions characterized by excessive fat accumulation in the liver not caused by alcohol. NASH involves liver inflammation and cell damage and can progress to cirrhosis.
• Alcohol-Related Liver Disease (ARLD): Liver damage caused by excessive alcohol consumption, ranging from fatty liver and alcoholic hepatitis to advanced cirrhosis.

Inflammatory Bowel Disease (IBD) Focus

• Ulcerative Colitis (Proctitis, Left-sided Colitis, Pancolitis): A chronic inflammatory condition that causes inflammation and ulcers primarily in the lining of the large intestine (colon and rectum), typically presenting with bloody diarrhea, urgency, and abdominal pain.
• Indeterminate Colitis & IBD-Unclassified (IBD-U): Cases of IBD, particularly early in the disease course, where it is difficult to definitively distinguish between Crohn's disease and ulcerative colitis based on clinical, endoscopic, and histological features.
• Crohn's Disease (Ileal, Colonic, Ileocolonic, Perianal): A chronic inflammatory condition that can affect any part of the digestive tract from mouth to anus, causing transmural (full-thickness) inflammation, pain, diarrhea, weight loss, and potential complications like strictures or fistulas.

This list is not exhaustive. For personalized advice regarding your specific digestive condition, please consult with Dr. Émilie St-Onge.

• Screening & Prevention Strategies for Gastrointestinal Cancers: Risk assessment and counseling on screening for colorectal cancer, esophageal cancer (in Barrett's esophagus), gastric cancer, and liver cancer (in cirrhosis), including FIT testing and colonoscopy recommendations.
• Management of Functional Dyspepsia & Functional Abdominal Pain Syndrome: Diagnosis and management of chronic upper abdominal pain or discomfort (dyspepsia) or generalized abdominal pain without an identifiable structural cause, often involving lifestyle, dietary, and neuromodulator therapies.
• Upper Endoscopy (EGD - Esophagogastroduodenoscopy) with Biopsy & Interventions: Diagnostic and therapeutic procedure to examine the esophagus, stomach, and duodenum using a flexible tube with a camera. Allows for targeted biopsies, polyp removal (polypectomy), dilation of strictures, control of bleeding (hemostasis), and foreign body removal.
• Irritable Bowel Syndrome (IBS) Comprehensive Diagnosis & Management (including subtypes IBS-D, IBS-C, IBS-M): Multifaceted approach to managing IBS symptoms (abdominal pain, bloating, diarrhea, constipation, mixed pattern) including thorough exclusion of other conditions, dietary modifications (e.g., low FODMAP diet), lifestyle changes, stress management, and targeted medications.
• Chromoendoscopy & Advanced Imaging Techniques (e.g., NBI, FICE): Use of special dye sprays (chromoendoscopy) or electronic light filters (Narrow Band Imaging, Fuji Intelligent Chromo Endoscopy) during endoscopy to enhance visualization of mucosal patterns and improve detection of subtle lesions or precancerous changes.
• ERCP (Endoscopic Retrograde Cholangiopancreatography) - Diagnostic & Therapeutic: Specialized procedure combining upper endoscopy and X-rays to diagnose and treat problems of the bile and pancreatic ducts, such as gallstone removal from bile duct, stent placement for strictures or leaks, and sphincterotomy.
• Capsule Endoscopy (Small Bowel & Colon): Non-invasive procedure where the patient swallows a vitamin-pill sized camera that takes pictures of the small intestine (for obscure GI bleeding, Crohn's disease) or colon (as an alternative to colonoscopy in select cases).

Note: This list provides a general overview. Specific procedures and treatments are determined after a thorough evaluation. Discuss with Dr. St-Onge for care relevant to your specific condition.

All medical and surgical services (if applicable) are provided in accordance with the standards of practice set by the Collège des médecins du Québec (CMQ) and relevant gastroenterological care guidelines. Contact the clinic or your referring physician regarding new patient intake and referral processes.

CSSSTR-centre hosp. rég. de Trois-Rivières is situated in the vibrant Cap-de-la-Madeleine Sector West neighborhood of Trois-Rivières. The facility is easily accessible via UQTR Access, with convenient public transit options provided by the Société de transport de Trois-Rivières (STTR). The building is wheelchair accessible to accommodate all patients. Metered street parking and nearby parking lots are available to visitors, ensuring a comfortable and stress-free experience for those attending appointments with Dr. St-Onge.

Are consultations and procedures like endoscopies with Dr. St-Onge, a Gastroenterologist, covered by Régie de l'assurance maladie du Québec (RAMQ) in QC?

Medically necessary consultations with a licensed Gastroenterologist like Dr. St-Onge, as well as most diagnostic procedures (e.g., endoscopies for investigating symptoms, biopsies for medical reasons) and treatments for provincially insured digestive conditions (e.g., IBD, celiac disease, screening colonoscopies as per provincial guidelines, liver disease management), are generally covered by Régie de l'assurance maladie du Québec (RAMQ) in QC when a referral from a family doctor or another specialist is in place. Procedures considered purely for screening outside of guidelines, or for non-medical reasons, and some advanced technologies or specific drug therapies might have different coverage. It's crucial to discuss coverage specifics for any proposed treatment or procedure with Dr. St-Onge's office, the hospital/clinic's financial services, or Régie de l'assurance maladie du Québec (RAMQ) beforehand.

Do I need a referral from my family doctor to see Dr. St-Onge, a Gastroenterologist?

Yes, in nearly all cases, a referral from your family physician or another specialist (such as an internist or surgeon) is required to schedule an appointment with a Gastroenterologist like Dr. St-Onge for services covered by the provincial health plan. Gastroenterological issues often require initial assessment and preliminary investigations by your primary care provider. The referral ensures that a specialist consultation is appropriate, helps with prioritizing appointments, and facilitates coordinated care, including the transfer of relevant medical information.

How does a Gastroenterologist like Dr. St-Onge approach the management of Inflammatory Bowel Disease (IBD)?

The management of IBD (Crohn's disease and ulcerative colitis) by a Gastroenterologist like Dr. St-Onge is a highly individualized and long-term process. The primary goals are to induce and then maintain remission (control inflammation), alleviate symptoms, prevent complications, and improve the patient's overall quality of life. Treatment strategies often involve a combination of medications, which can include aminosalicylates (5-ASAs), corticosteroids (for acute flare-ups), immunomodulators (e.g., azathioprine, methotrexate), and increasingly, biologic therapies or small molecule drugs that target specific inflammatory pathways. Regular monitoring through clinical assessment, blood tests, stool tests (like fecal calprotectin), and endoscopic procedures is crucial to track disease activity and adjust treatment as needed. Nutritional counseling and lifestyle advice are also integral parts of comprehensive IBD care.

What is generally involved in preparing for a colonoscopy procedure?

Preparing for a colonoscopy is a critical step to ensure the procedure is effective and safe. Dr. St-Onge's office will provide very specific instructions, which must be followed closely. Typically, preparation involves dietary changes for a few days beforehand (e.g., low-residue diet), followed by a clear liquid diet for the 24 hours prior to the exam. The most important part is the bowel cleansing process, which involves drinking a prescribed laxative solution designed to completely empty and clean your colon. This usually starts the evening before and may continue the morning of the procedure. You'll also need to arrange for transportation home, as sedation is commonly used.

CSSSTR-centre hosp. rég. de Trois-Rivières
1991 boul du Carmel
Trois-Rivières, QC G8Z 3R9

Phone: (819) 697-3333

The facility is wheelchair accessible.

Dr. St-Onge is a licensed Gastroenterologist regulated by the Collège des médecins du Québec (CMQ) under the Medical Act in QC. A referral from a family physician or appropriate specialist is typically required for consultations with Dr. St-Onge for services covered by the provincial health plan.

Verify registration with the Collège des médecins du Québec (CMQ): https://www.cmq.org/en/directory/physicians?number=15099