What are the after-effects of esophagogastroduodenoscopy?

Dec 08, 2021
What are the after-effects of esophagogastroduodenoscopy?
Our clinic performs esophagogastroduodenoscopy (gastric camera) that directly observes the esophagus, stomach, duodenum, etc., and lower gastrointestinal endoscopy (colonoscopy) that directly monitors the inside of the large intestine.

Our clinic performs esophagogastroduodenoscopy (gastric camera) that directly observes the esophagus, stomach, duodenum, etc., and lower gastrointestinal endoscopy (colonoscopy) that directly monitors the inside of the large intestine.

These two endoscopies diagnose the presence of neoplastic lesions such as inflammation and early cancer in the gastrointestinal tract. Both tests allow observation and tissue sampling (biopsy: picking out a tiny piece of tissue and examining it in detail with a microscope, etc.) and a simple endoscope if necessary. You can also perform a surgical procedure.

Behavior after inspection, precautions

  • You cannot eat or drink for 1-2 hours until your throat is anesthetized.
  • The nurse will give you an explanation sheet about the precautions after the test.
  • The nurse in charge of the examination will explain the internal medication after the examination.
  • Those who have used sedatives will be asked to rest for about an hour at the hospital after the test before returning home.
  • The doctor in charge will explain the test results at the time of the outpatient visit after the test.

Complications of esophagogastroduodenoscopy

In rare cases of upper gastrointestinal endoscopy, gastrointestinal bleeding and perforation may occur in this case, hospitalization or urgent treatment/surgery may be required. It has been reported that 0.005% of oral upper gastrointestinal endoscopy and 0.024% of nasal upper gastrointestinal endoscopy for observation in 2008-2012.

What is endoscopic resection?

 It is a method of removing polyps and cancer using an endoscope. This is a method of eliminating early cancer, mainly in the esophagus and stomach, using an endoscope. Methods are divided into polypectomyendoscopic mucosal resection (EMR), and endoscopic submucosal dissection (ESD), and early cancer, which previously required surgery, can now be resected by endoscopic treatment, which is less burdensome to the body. However, please consult with your doctor as the indication will be determined strictly according to the size and depth of the lesion and the type of cancer. After excision, an artificial ulcer develops in the lesion. In rare cases, bleeding or perforation may occur, so in principle, you should be hospitalized.

Side effects of the drug used for the test

The medicines used for gastroscopy leaves different side effects on the patients the side effects of these drugs are as follows:

Gascon drop

Leaves no special side effects on the patient

Xylocaine spray

History of local anesthetic hypersensitivity (those who have trouble with dental anesthesia, etc.)

Butyl scopolamine

Heart disease, glaucoma, benign prostatic hyperplasia 


Glaucoma, respiratory depression


it is used for Respiratory depression

Precautions after inspection


Anesthesia is effective in the throat for about 1 hour after the test. After about an hour, drink a small amount of water and ensure that you don’t get sick before eating. Drink and eat according to the instructions at each facility (usually from 1 hour after the end of the examination and from 30 minutes to 1 hour after the nasal endoscopy).

Driving a car

If you use antispasmodics or sedatives, please avoid driving the car after the inspection on the day of the inspection, depending on the type. The effects of the injections used before the test will remain for some time. Please rest in the clinic for about an hour before returning. Those given intravenous sedatives should not drive for one day (24 hours).

Those who took the tissue (those who had a biopsy)

In rare cases, bleeding may occur from the area where the tissue is pinched. Do not exercise vigorously on the day of the test and rest. Drinking alcohol or bathing in hot water can cause bleeding. Please do not drink on the day and stay in the shower. Eat digestible foods.

If you have tissue or polyps, please refrain from strenuous exercise on the day. Also, avoid long baths and take a shower. In addition, there is a stimulus meal, drinking, coffee, etc. Please avoid as much as possible 2-3 days.

  • If you have undergone pigment endoscopy (such as indigo carmine), your stool may turn blue, but don’t worry.
  • The final examination result will be available later, so please check the date of your subsequent outpatient examination.
  • If you experience nausea, abdominal pain, or tar stool (black stool) after the examination, please get in touch with the department in charge (endoscope center, outpatient department, etc.) of each facility (clinic, hospital) immediately.

Complications of upper gastrointestinalendoscopy

In rare cases of upper gastrointestinal endoscopygastrointestinal bleeding and perforation may occur and you may require hospitalization or urgent treatment/surgery. The incident rate of upper gastrointestinal endoscopy is reported to be 0.171%