Types of Endoscopy: All Endoscopies That Exist Today and Their Benefits

It is a procedure in which your doctor uses specialized instruments to observe and support surgical interventions on structures inside the body.

This procedure allows surgeons to view the body’s organs without making large incisions.

A surgeon inserts an endoscope through a small cut or opening in the body, such as the mouth.

An endoscope is a flexible fiberoptic probe with a light source and an attached camera that allows the doctor to notice abnormalities.

The doctor can lean on the endoscope with forceps and scissors to remove tissue for a biopsy.

The usefulness of an endoscopy

Endoscopy is a diagnostic method and can even be used to perform certain surgeries without having to make a large incision.

A screen in the operating room allows the doctor to reproduce in an image precisely what the endoscope captures in real-time.


Endoscopy is generally used to:

  • Determine the cause of any symptoms, allowing a better diagnosis by observing the interior of a specific body area.
  • They are removing small samples of tissue, which can then be sent to a laboratory for pathological testing. This procedure is called an endoscopic biopsy.
  • Support surgical procedures, such as repairing stomach ulcers or removing gallstones or tumors.
  • Remove foreign bodies, or stop bleeding.
  • Give treatments inside the dilated veins of the esophagus in order to stop bleeding.
  • Destroy abnormal tissues or clot blood vessels.

An endoscopy may be ordered when symptoms of any of the following conditions occur:

Your doctor will review your symptoms, perform a physical exam, and possibly conduct blood tests before an endoscopy.

These tests will help your doctor gain a more accurate understanding of the possible cause of your symptoms.


Most types of endoscopy require fasting, you should stop eating solid foods for up to 12 hours before the procedure, and two hours before the procedure, you can allow clear liquids, such as water or some juice.

Your doctor may recommend some laxative or enema to use the night before the procedure to clean the system.

This is common in procedures that involve the gastrointestinal and anal tracts.

Before endoscopy, the doctor should perform a physical exam and review the patient’s complete medical history, including all previous surgeries.

The doctor should be informed about any allergies and the medications being used, especially medications that can affect bleeding, anticoagulants, or antiplatelets.

Types of endoscopy

Endoscopes come in different shapes and lengths, each designed to look at different body parts.

Most are thin, hollow, flexible tubes with a light attached.

Some also come with a small video camera that transmits images to a computer.

Newer versions of endoscopes are small enough to be swallowed and send images wirelessly to a computer.

Endoscopies are classified based on the area of ​​the body they investigate.

The American Cancer Society (ACS) lists the following types of endoscopies:

  • Arthroscopy – Used to examine the joints. It is done through a small incision near the joint being examined.
  • Bronchoscopy – Used to examine the trachea and bronchi through the mouth or nose.
  • Colonoscopy – Used to examine the colon and large intestine through the anus.
  • Cystoscopy – Used to examine the bladder through the urethra.
  • Enteroscopy – Used to examine the small intestine through the mouth or anus.
  • Gastroscopy or Upper Endoscopy – Used to examine the stomach, esophagus, and duodenum through the mouth with an esophagogastroduodenoscopy.
  • Hysteroscopy: A hysteroscope is passed through the vagina and cervix to examine the uterus.
  • Laparoscopy: This is used to examine the organs and tissues of your abdomen and pelvis through an incision in your stomach.
  • Laryngoscopy – Used to examine the larynx through the mouth or nose.
  • Mediastinoscopy examines the space between your lungs through an incision over the breastbone.
  • Sigmoidoscopy examines your rectum and the lower part of your large colon through the anus.
  • Thoracoscopy: This is used to examine the chest cavity and its contents (the lungs and the lining of the lungs) through an incision in the chest.
  • Ureteroscopy – Used to examine the ureter.

The latest techniques in endoscopic technology, like most technologies, are constantly advancing. Newer generations of endoscopes use high-definition imaging to create images with incredible detail.

Innovative techniques also combine endoscopy with imaging technology or surgical procedures.

Here are some of the latest endoscopy technologies:

Capsule endoscopy

A revolutionary procedure known as a capsule endoscopy can be used when other evidence is inconclusive.

A small pill with a small chamber inside is swallowed during this procedure.

The capsule passes through your digestive tract without discomfort and creates thousands of images of the intestines as it goes.

Endoscopic retrograde cholangiopancreatography

This procedure is a combination of X-rays with digestive endoscopy for the diagnosis or treatment of conditions of the bile and pancreatic ducts.


Chromoendoscopy is a technique that uses a specialized stain or dye on the lining of the intestine during an endoscopy procedure.

The dye helps the doctor better see if there is something abnormal in the intestinal lining.

Endoscopic ultrasound

Endoscopic ultrasound uses ultrasound in conjunction with an endoscopy.

This allows doctors to see organs and other structures that are not usually visible during a regular endoscopy.

A fine needle can then be inserted into the organ or framework to retrieve some tissue for viewing under a microscope.

Endoscopic resection of the mucosa

This is a technique used to help doctors eliminate cancerous tissue in the digestive tract.

In endoscopic mucosal resection, a needle is passed through the endoscope to inject fluid under the abnormal tissue.

This helps separate the cancerous tissue from the other layers so that it can be more easily removed.

Narrow band image

To perform this procedure, a special filter is used to help create more contrast between the vessels and the mucosa.

The mucosa is the inner lining of the digestive tract.


Endoscopy has a much lower risk of bleeding and infection than open surgery.

Endoscopy can produce effects, but most are related to medications used for sedation.

On the other hand, endoscopy is a medical procedure, so it poses a particular risk of bleeding, infection, and other rare complications, such as:

  • Chest pain.
  • Organ damage, including possible perforation.
  • Fever.
  • Persistent pain in the endoscopy area.
  • Redness and swelling at the incision site.

The risks for each type depend on the location of the procedure and the patient’s condition.

For example, dark-colored stools, vomiting, and difficulty swallowing after a colonoscopy could indicate something wrong.

A hysteroscopy carries a small risk of uterine perforation, uterine bleeding, or cervical trauma.

In the procedure where the endoscopic capsule is used, there is a risk that the capsule will not follow its ordinary course in the digestive tract, becoming stuck.

The risk is higher for people with a condition that causes a narrowing digestive tract, such as a tumor. The capsule may need to be surgically removed.

Most endoscopies are outpatient procedures. The doctor will close the incision wounds with stitches immediately after the procedure and give instructions on how to care for this wound for sound healing. Some procedures can leave a bit of discomfort.

After an upper endoscopy, there may be a possibility of a sore throat, and soft food may be required for a couple of days.

You may have blood in your urine after a cystoscopy to examine your bladder.