Esophageal manometry is a test that determines how well the muscles of the esophagus (the food pipe) perform to move food and drinks from your mouth into your stomach. It measures the esophagus pressure and motor function. The PH manometry is performed for the following reasons:

  • To evaluate the cause of gastric reflux, difficulty swallowing, and non-cardiac chest pain 
  • Preoperative evaluation for anti-reflux surgery
  • To ensure proper placement of pH probes 


  • Difficulty in swallowing
  • Pain when swallowing
  • Heartburn or reflux
  • Chest pain


Esophageal manometry is an outpatient procedure that takes about 20 to 30 minutes. The patient is seated in a comfortable, reclining, or semi-reclining position. The nose and throat are numbed with a spray or gel. This will minimize any discomfort associated with the further procedure. A small catheter is inserted through the patient's nose and into the stomach.


During the procedure, the patient can breathe, swallow or talk with ease. The patient is asked to swallow several times. The pressures resulting from these swallowing movements will be detected and recorded by tiny sensors located on the catheter. 


  • Any type of serious risk for PH manometry procedure is very rare
  • Minor side effects could be a runny nose 
  • Minor discomfort in the throat
  • During tube insertion, it may enter the larynx causing a temporary choking feeling. But it is recognized immediately and the tube is instantly removed.

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Frequently Asked Questions

It is a catheter-based test that helps to determine the amount of acid reflux from the stomach into the esophagus over a 24-hour time period. 

The catheter will measure the acid level (known as pH level) for 24 hours and results if the patient has acid reflux or GERD (Gastroesophageal reflux disease) 

The procedure is not painful, but it is slightly uncomfortable. The nostrils through which the tube (catheter) is inserted are under anesthesia during the procedure.

The normal esophageal level is close to 7.0. If the pH level shows the score below 4.0 than it indicates higher acidity. 

The test lasts about 30-45 minutes. During the procedure, the patient is seated upright on the chair. The nurse applies a numbing gel to one of nostrils and numbing spray to the back of the throat. 

You will be NPO (Nothing to eat and drink) starting at midnight the night before the procedure. The doctor will guide you more on this

You may resume the normal diet and activities after an esophageal manometry. You may feel sore throat which is just temporary.

You should not eat or drink after midnight the night before your test when scheduled for a morning appointment.

High-resolution manometry enables an accurate diagnosis of hiatal hernia and a better classification than endoscopy and radiology.

Esophageal manometry is a test that is used to measure the function of the lower esophageal sphincter (the valve that prevents reflux, or backward flow, of gastric acid into the esophagus) and the muscles of the esophagus.

PH Manometry is covered under insurance; you need to talk to our Hospione Team for more information.

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