Esophageal pH monitoring

定义

Esophageal pH monitoring is a test that measures how often stomach acid enters the tube that leads from the mouth to the stomach (called the esophagus). The test also measures how long the acid stays there.

选择的名字

pH monitoring - esophageal; Esophageal acidity test

How the Test is Performed

A thin tube is passed through your nose or mouth to your stomach. The tube is then pulled back into your esophagus. A monitor attached to the tube measures the acid level (pH) in your esophagus.

You will wear the monitor on a strap and record your symptoms and activities over the next 24 hours in a diary. You will return to the hospital the next day and the tube will be removed. The information from the monitor will be compared with your diary notes.

Infants and children may need to stay in the hospital for the esophageal pH monitoring test.

A newer method of monitoring esophageal acid (pH monitoring) is by use of a wireless pH probe. This is called the Bravo pH monitor system.

• This capsule-like device is attached to the lining of the upper esophagus with an endoscope.
• It remains in the esophagus where it measures acidity and transmits pH levels to a recording device worn on the wrist.
• The capsule falls off after a 4 to 10 days and moves down through gastrointestinal tract. It is then expelled with a bowel movement and flushed down the toilet.

How to Prepare for the Test

Your health care provider will ask you to not eat or drink after midnight before the test. You should also avoid smoking.

Some medicines may change the test results. Your provider may ask you to not take these for between 24 hours and 2 weeks (or more) before the test. You also may be told to avoid alcohol. Medicines that you may need to stop include:

• 肾上腺素能受体阻滞剂
• 抗酸药
• 抗胆碱能类
• 胆碱能
• 糖皮质激素
• H₂ 阻断剂
• 非甾体抗炎药
• 质子泵抑制剂

Do not stop taking any medicine unless told to do so by your provider.

考试的感觉如何

You briefly feel like gagging as the tube is passed through your throat.

The Bravo pH monitor causes no discomfort.

Why the Test is Performed

Esophageal pH monitoring is used to check how much stomach acid is entering the esophagus. It also checks how well the acid is cleared downward into the stomach. It is a test for gastroesophageal reflux disease (GERD).

In infants, this test is also used to check for GERD and other problems related to 过度哭泣.

正常的结果

Normal value ranges may vary depending on the lab doing the test. Talk to your provider about the meaning of your specific test results.

What Abnormal Results Mean

Increased acid in the esophagus may be related to:

• 巴雷特食管
• Difficulty swallowing (dysphagia)
• 食管瘢痕
• Gastroesophageal reflux disease (GERD)
• 胃灼热
• 反流性食管炎

You may need to have the following tests if your provider suspects 食管炎:

• 吞钡
• Esophagogastroduodenoscopy (also called upper GI endoscopy)

风险

Rarely, the following may occur:

• 心律失常 during insertion of the tube
• Breathing in of vomit if the catheter causes 呕吐

参考文献

福尔克GW，卡兹卡DA. Diseases of the esophagus. In: Goldman L, Schafer AI, eds. Goldman-Cecil医学. 26日艾德. Philadelphia, PA: Elsevier; 2020:chap 129.

Kavitt RT, Vaezi MF. Diseases of the esophagus. In: Flint PW, Francis HW, Haughey BH, et al, eds. Cummings Otolaryngology: Head and Neck Surgery. 7日艾德. Philadelphia, PA: Elsevier; 2021:chap 68.

Richter JE, Vaezi MF. Gastroesophageal reflux disease. In: Feldman M, Friedman LS, Brandt LJ, eds. Sleisenger and Fordtran's Gastrointestinal and Liver Disease. 11日艾德. Philadelphia, PA: Elsevier; 2021:chap 46.