GI Function Unit

The Gastrointestinal Function Testing Unit provides a unique scope of diagnostic tests and procedures to further investigate referred patients with a variety of digestive disorders.


Hotel Dieu Hospital site
Johnson, Level 4 Room 473
Registration: Jeanne Mance, Level 4

Contact Information 

You can reach us by calling 613-544-3400 extension 2417

Hours of Operation 

Monday & Friday 
8 a.m. - 12:30 p.m. 

Tuesday, Wednesday & Thursday 
8 a.m. - 3 p.m.


Patients require a referral from their family doctor or another health care professional. 
Healthcare professionals can access our referral form here.


  • 3C Urea Breath Test - bacterial infection Helicobacter pylori
  • Lactose Tolerance Breath Test 
  • Glucose Hydrogen Breath Testing - Bacterial overgrowth 
    • Referrals are restricted to surgery, medicine, pediatrics and gastroenterology 
  • Fecal Weight

Referrals are restricted to surgery, medicine, pediatrics and gastroenterology. 

  • 24 hour pH study
  • Esophagageal Manometry
  • Anorectal Manometry 
  • Video Capsule Endoscopy - Small Bowel



  • Patients should bring a list of their current medications including inhalers and over-the-counter medications.
  • For details about how to prepare for your appointment in the GI Function Unit please refer to the brochure  corresponding with the test or procedure you are scheduled for.
Patient Brochures

Additional resources