Understanding the Endoscopy Procedure: What to Expect from Your EGD (Upper Endoscopy)

If you’ve been advised to undergo an endoscopy procedure, you might feel uncertain about what it involves, how to prepare, or what it can diagnose. At Colon & Digestive Health Specialists, our expert gastroenterologists use EGD (esophagogastroduodenoscopy) to detect and manage a variety of upper gastrointestinal (GI) conditions with precision and care.

In this blog, we’ll walk you through what an endoscopy procedure is, what it detects, how it works, and how to prepare for one—so you feel confident and informed every step of the way.

What Is an Endoscopy Procedure?

An endoscopy procedure is a minimally invasive diagnostic test that uses a thin, flexible tube with a light and camera (called an endoscope) to visually examine the inside of the digestive tract. When focused on the upper GI tract—which includes the esophagus, stomach, and the first part of the small intestine (duodenum)—it’s called an EGD or upper endoscopy.

This procedure is often recommended when patients experience symptoms such as:

• Persistent heartburn or acid reflux

• Difficulty swallowing (dysphagia)

• Nausea or vomiting

• Unexplained weight loss

• Upper abdominal pain or discomfort

• Suspected GI bleeding

Why You Might Need an Upper Endoscopy (EGD)

An upper endoscopy procedure allows doctors to:

• Identify the cause of GI symptoms

• Diagnose conditions such as ulcers, inflammation, or infection

• Detect precancerous changes like Barrett’s esophagus

• Monitor chronic diseases like GERD or celiac disease

• Remove abnormal tissue or take a biopsy for lab analysis

• Treat certain conditions (e.g., dilating strictures, stopping bleeding)

What Conditions Can an Endoscopy Procedure Detect?

The EGD endoscopy procedure is a powerful diagnostic tool used to identify a range of upper GI diseases, including:

• Gastroesophageal reflux disease (GERD)

• Peptic ulcers in the stomach or duodenum

• Esophagitis (inflammation of the esophagus)

• Celiac disease

• Hiatal hernia

• Esophageal or gastric cancer

• Barrett’s esophagus

• H. pylori infection

• Eosinophilic esophagitis (EoE)

• Upper GI bleeding sources

• Benign tumors or polyps

When patients ask, “What disease can be detected by an endoscopy procedure?” the answer is extensive. Your gastroenterologist uses the EGD to gain critical insights and offer timely treatment options based on direct visual evidence and biopsies.

What to Expect During the EGD Endoscopy Procedure

The EGD is typically performed as an outpatient procedure and takes about 15–30 minutes. Here's how it works:

1. Preparation: You’ll be asked to fast (no food or drinks) for 6–8 hours before the test.

2. Sedation: A sedative is given to help you relax or sleep through the procedure.

3. Procedure: The endoscope is gently inserted through the mouth and guided down the esophagus, into the stomach and duodenum.

4. Inspection & Biopsy: The physician examines the lining of your upper GI tract and may take small tissue samples.

5. Recovery: After the procedure, you’ll rest in a recovery area while the sedation wears off. You’ll need someone to drive you home.

The procedure is safe, and complications are rare, especially when performed by experienced gastroenterologists like the team at Colon & Digestive Health Specialists.

Preparing for Your Endoscopy Procedure

To ensure a smooth and effective procedure:

• Follow fasting instructions carefully (usually no food/drink 6–8 hours prior).

• Disclose medications you’re taking, especially blood thinners, diabetes meds, or supplements.

• Arrange transportation, as you won’t be able to drive after sedation.

• Wear comfortable clothing, and leave valuables at home.

Your healthcare provider will give you specific instructions based on your medical history.

After the Endoscopy Procedure: What’s Next?

You may feel groggy for a few hours, and mild throat discomfort is common. Most patients resume normal activities by the next day. Your doctor will review the results and contact you if a biopsy was taken. Based on findings, they’ll recommend treatment or follow-up care.

Why Choose Colon & Digestive Health Specialists?

At ColonDigestive.com, we offer:

Expert GI care using the latest endoscopic technology
Personalized treatment plans based on your condition
A caring, supportive team that prioritizes your comfort
Convenient scheduling and streamlined patient experience

Whether you're dealing with chronic acid reflux, digestive pain, or unexplained symptoms, an endoscopy procedurecould provide the answers you need.

Schedule Your Endoscopy Procedure Today

If you’ve been recommended for an EGD (upper endoscopy) or are experiencing persistent digestive symptoms, don’t wait. Early diagnosis leads to more effective treatment.