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Having Trouble Swallowing? Here is How the EndoFLIP Test Can Find the Real Cause!

Dr. Priya Sammani (MBBS)
Medically Reviewed by Dr. Priya Sammani (MBBS) ✓ Medically Reviewed
📅 Updated: Oct 18, 2026 • ⏱ 9 min read • Editorial Policy
Having Trouble Swallowing? Here is How the EndoFLIP Test Can Find the Real Cause!
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Have you ever tried to eat a meal and felt like your food got stuck right in your throat? For many people, this frustrating problem happens often and makes mealtime stressful.

If you have trouble swallowing, your doctor may suggest a special test to find out why. This test is called the EndoFLIP test, and it can give you and your doctor clear answers.

Key Takeaways About the EndoFLIP Test.

  • What it is: A quick test that measures the size and flexibility of your swallowing tube.
  • How it is done: Usually performed at the same time as your upper endoscopy while you sleep under anesthesia.
  • Why it helps: It detects hidden issues like achalasia or esophageal stiffness that cause food to stick.
  • What to expect: It takes only about 15 minutes, causes no pain, and you go home the same day.
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What Is the EndoFLIP Test?

In simple terms, the EndoFLIP test checks how well your swallowing tube works. We call this tube your esophagus, which acts like a smooth water pipe carrying food from your mouth down to your stomach.

The EndoFLIP test measures how much open space you have inside your esophagus. It also checks how the walls of your tube react when gentle pressure is applied.

These measurements help your doctor figure out if anything blocks your food from moving smoothly down to your stomach.

Doctors usually perform this test during an upper endoscopy. An endoscopy uses a thin, flexible tube with a tiny light and camera on the end, called an endoscope, to look inside your throat and stomach.

Because you receive anesthesia during this procedure, you will sleep deeply and feel nothing at all. You do not need to worry or feel afraid.

Who Needs an EndoFLIP Test and Why Is It Important?

Doctors who specialize in digestive system health, known as gastroenterologists, usually perform the EndoFLIP test. They use this tool to diagnose several specific conditions:

  • Achalasia: The muscles at the bottom of your esophagus fail to relax properly. Food gets stuck instead of passing into your stomach, much like a pinched water hose.
  • Eosinophilic Esophagitis: White blood cells called eosinophils build up in your esophageal walls and cause painful swelling or inflammation. This makes swallowing difficult and triggers heartburn.
  • GERD (Gastroesophageal Reflux Disease): Stomach acid flows backward into your esophagus. Over time, this acid damages the tissue and leads to swallowing problems.

Doctors may also use this test to check if your esophagus functions correctly after you undergo surgery.

How Does the EndoFLIP Work?

Now let us look at how this procedure works. During the test, a very thin plastic tube called a catheter goes into your esophagus.

A small balloon covers the tip of this catheter. Tiny sensors sit on the outside of this balloon.

Wires connect these sensors to a data recorder outside your body. It is a truly remarkable piece of modern medical technology.

Your gastroenterologist gently inflates the balloon inside your esophagus. The sensors measure the pressure inside your tube and record its internal diameter, which is the exact size of the open space.

This pressure reading shows if your esophagus is narrower than normal or if the walls are too stiff. Both problems stop your esophagus from pushing food down to your stomach. This gives your doctor vital clues about your health.

How Should You Prepare for an EndoFLIP Test?

You do not need to stress about preparing for this test. Your doctor will give you clear instructions, but standard steps include the following:

  • Stop eating and drinking for at least four hours before your test. Keeping your stomach empty is essential for safety.
  • Because you receive anesthesia, you will feel sleepy or a bit groggy afterward. Make sure you arrange for someone to drive you home, as driving yourself is unsafe.

What Actually Happens During the EndoFLIP Procedure?

First, an anesthesiologist gives you medicine through an IV in your arm so you fall asleep. Then, your gastroenterologist follows these steps:

1. They gently guide the endoscope, which has a small camera and light, through your mouth and into your esophagus. This camera lets your doctor see inside images on a monitor.

2. Using those camera views as a guide, they pass the EndoFLIP catheter into your esophagus.

3. They slowly inflate the small balloon on the catheter.

4. They monitor the data measurements sent from the sensors on the catheter.

5. They deflate the balloon completely.

6. They carefully remove both the EndoFLIP catheter and the endoscope.

This entire EndoFLIP test takes only about 15 quick minutes, and you will not feel a thing.

Does the Test Hurt?

No, this test does not hurt. Because you are asleep under anesthesia, you feel zero pain. You do not need to worry about this part at all.

However, when the doctor inserts the endoscope and EndoFLIP catheter through your throat before you fall asleep, you might feel a mild pressure sensation. It does not hurt. It simply feels like something is sliding down your throat.

Important: Because you receive anesthesia, you will feel no discomfort during the procedure. Keep your mind at ease and try not to worry.

What Happens After the Test? Can You Go Home?

After the test finishes, staff wheels you to a recovery room. You stay there until the anesthesia wears off and you wake up fully, which usually takes about one hour.

After that, you can go home. Remember the rule about having a friend or family member drive you.

Can This Test Cause Any Side Effects?

Side effects from this test happen very rarely. Because the doctor passed the instruments through your throat, you might feel a mild scratchy throat or minor soreness for a day or two.

It feels very similar to having a slight cold or sore throat. Drinking extra water usually makes it go away quickly.

How Long Does It Take to Get Results?

Your doctor might share preliminary results before you leave the hospital. Otherwise, they will discuss them during your follow-up appointment.

During that visit, you and your doctor will talk about the next steps, whether you need more tests, and what treatment plan fits you best.

Is EndoFLIP Better Than Manometry?

Doctors use two main tests to find problems in the esophagus: esophageal manometry and the EndoFLIP test.

Esophageal manometry mainly measures how your esophageal muscles work, specifically testing the muscle movement called peristalsis that pushes food down.

However, the EndoFLIP test provides much more detailed information. For instance, it shows how much open space exists inside your esophagus and how flexible or stiff the walls are.

Your doctor will choose the test that best matches your specific symptoms and health needs.

Feature. Esophageal Manometry. EndoFLIP Test.
Primary Focus. Measures muscle contraction waves (peristalsis). Measures cross-sectional area, diameter, and wall stiffness.
Anesthesia Used. Usually done while awake (nasal tube). Done during upper endoscopy under sedation.
Main Benefit. Best for checking overall muscle coordination. Best for detecting blockages and tissue distensibility.

Struggling to swallow makes eating unenjoyable. Worrying about what foods you can or cannot eat creates constant stress. Wondering why this happens to you can make you feel frustrated.

Getting an EndoFLIP test can help you find clear answers to these questions.

What Should You Remember Most?

We hope this guide gives you a clear understanding of the EndoFLIP test. The main thing to remember is that this test checks if your swallowing tube works correctly.

The EndoFLIP test helps find the exact cause of your swallowing difficulties. You might need other tests to get a complete diagnosis, but this test serves as a crucial first step toward healing.

Once you complete this first step, your doctor can start the right treatment. Then you can enjoy meals without fear, stop worrying about whether your next bite will go down, and savor your food in peace.

If you experience swallowing problems yourself, visit a doctor for professional advice. That is the best choice you can make. You will find a solution to this problem quickly.

When to Seek Emergency Medical Help.

Call 911 (US/Canada), 999 (UK), or go to your nearest Emergency Department right away if you experience any of these red flags:

  • Complete inability to swallow your own saliva or liquids.
  • Sudden, severe chest pain that feels crushing or radiates to your back or arm.
  • Difficulty breathing, shortness of breath, or choking spells.
  • Vomiting blood or passing black, tarry stools.
❓ FAQ

Frequently Asked Medical Questions (FAQ)

Evidence-based clinical answers to common patient questions

What is an EndoFLIP test used for?

An EndoFLIP test measures the inner dimensions and wall stiffness of your esophagus. Doctors use it to diagnose swallowing disorders like achalasia, eosinophilic esophagitis, and GERD.

Does the EndoFLIP test hurt?

No, the test does not hurt. You receive anesthesia during the procedure so you sleep comfortably and feel no pain while the doctor inserts the catheter.

How long does the procedure take?

The actual EndoFLIP measurement takes only about 15 minutes. However, you should plan to spend a bit more time at the clinic for preparation and recovery from sedation.

Can I drive home after the test?

No, you cannot drive yourself home because you receive sedative medicines. You must arrange for a family member or friend to drive you safely.

How is EndoFLIP different from a standard endoscopy?

A standard endoscopy lets doctors look at the visual lining of your digestive tract with a camera. EndoFLIP adds a specialized balloon catheter to measure pressure and elasticity.

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Verified Scientific & Medical References (PubMed / WHO)

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