Upper endoscopy
An upper endoscopy, also known as an esophagogastroduodenoscopy (EGD), examines the esophagus, the stomach and the first part of the small intestine. It is used to investigate symptoms such as persistent heartburn, difficulty swallowing, abdominal pain, nausea, vomiting or unexplained weight loss — and allows the doctor to diagnose and treat in the same exam.
How is an upper endoscopy performed?
During the exam, the patient is sedated to ensure their comfort. A thin, flexible tube with a camera at the tip — the endoscope — is gently passed through the mouth and guided down the esophagus to the stomach and duodenum.
The camera sends images to a monitor, allowing the doctor to examine the lining of these organs in detail. If needed, biopsies can be taken or treatments carried out — such as removing polyps or stopping bleeding — during the same procedure.
The exam usually takes 15 to 30 minutes and patients can go home the same day.
It provides a detailed view of the esophagus, stomach and duodenum, making it possible to identify changes that other diagnostic methods may miss.
Early detection and intervention help avoid complications and improve overall digestive health, particularly for patients with unexplained symptoms or chronic conditions that need ongoing management.
Preparing for the endoscopy
An upper endoscopy requires fasting in the hours before the exam, to ensure a clear view of the digestive tract. Our team explains the exact instructions when the appointment is booked.
Because the exam is performed under sedation, you should arrange for someone to accompany you and avoid driving that day.
Benefits of an upper endoscopy
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Accurate diagnosis — precisely identifies conditions such as gastritis, ulcers or Barrett's esophagus.
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Minimally invasive treatment — allows therapeutic interventions, such as removing foreign objects or polyps, without surgery.
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Early detection — picks up potential problems, such as pre-cancerous changes or small tumours, at an early stage.
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Better quality of life — resolves persistent symptoms such as heartburn, pain or difficulty swallowing.
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Monitoring chronic conditions — supports ongoing assessment in patients with gastroesophageal reflux disease (GERD), coeliac disease or other long-term digestive conditions.
What is assessed during the exam
Health of the digestive tract
Examination of the esophagus, stomach and duodenum to detect inflammation, ulcers or structural abnormalities.
Symptoms and medical history
Review of symptoms such as heartburn, nausea or difficulty swallowing, cross-referenced with personal and family medical history.
Tissue sampling
Biopsies may be taken to detect infections, coeliac disease or cancerous changes.
Treatment needs
Identification and resolution of issues such as bleeding, strictures or polyps during the procedure itself.
Preventive care
For patients with risk factors such as GERD or a family history of gastrointestinal disease, endoscopy is a valuable screening tool.
Common questions about the exam
Does an endoscopy hurt?+
No. The exam is performed under sedation, which keeps the patient comfortable throughout the procedure.
Do I need someone to come with me?+
Yes, we recommend having someone with you on the day of the exam, as the sedation means you cannot drive that day.
What is the difference between an endoscopy and a colonoscopy?+
An endoscopy examines the upper digestive tract (esophagus, stomach and duodenum). A colonoscopy examines the large intestine (colon and rectum). Your doctor will advise which one, or whether both, are needed.
When should I have this exam?+
Whenever you have persistent symptoms such as heartburn, difficulty swallowing, abdominal pain or unexplained weight loss, or when your doctor recommends it during a gastroenterology appointment.
Book your endoscopy
Diagnosis and treatment in the same exam, under sedation and with specialized gastroenterology care.
