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Endoscopy

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An endoscopy is a medical procedure used to examine the interior of a hollow organ or body cavity.

Insertion tip of endoscope
Insertion tip of endoscope

To perform this, doctors use a specialized instrument called an endoscope. Unlike many other medical imaging techniques, endoscopes are inserted directly into the organ being studied. This allows for a very close and direct view of the internal structures. Depending on the specific site and the type of procedure, a doctor or a surgeon may perform the endoscopy. During the process, a patient might be fully conscious or they might be under anesthesia.

PENTAX Colonoscope002
PENTAX Colonoscope002

The mechanism of an endoscopy involves the physical insertion of the device into the body. Once inside, the endoscope allows for direct observation of the organ's lining. Doctors can also use the device for more than just looking. A cutting tool can be attached to the end of the endoscope. This allows the medical team to perform minor procedures while they watch. For example, they can perform a biopsy, which is the removal of a tiny piece of tissue for testing. They can also use the tool to remove a polyp or a foreign object.

Esophageal Bougie Dilator
Esophageal Bougie Dilator

Additionally, the device can perform cauterization, which means using heat to stop a bleeding vessel.

There are many distinct types of endoscopy based on which part of the body is being examined. In the gastrointestinal tract, an esophagogastroduodenoscopy looks at the esophagus, stomach, and duodenum. Other specialized versions include enteroscopy for the small intestine and colonoscopy for the large intestine. Doctors can also use endoscopy to view the respiratory tract through rhinoscopy in the nose or bronchoscopy in the lungs.

Anoscope, proctoscope and rectoscope
Anoscope, proctoscope and rectoscope

Other tools allow for the inspection of the ears, the urinary bladder, and the female reproductive system. Even closed body cavities can be reached through small incisions using laparoscopy for the abdomen or arthroscopy for a joint.

The history of endoscopy began with an unusual inspiration. Adolf Kussmaul became fascinated by sword swallowers who could insert swords down their throats without gagging. This observation led him to consider using a hollow tube for medical observation. However, early doctors faced the challenge of providing light inside the body. They originally had to rely on candles and oil lamps to see through the tubes. On February 7, 1855, the engineer-optician Charles Chevalier first used the term "endoscope." Later, in 1894 or 1895, John Macintyre developed a self-illuminated endoscope at Glasgow Royal Infirmary in Scotland. He used this new technology to investigate the larynx, which is part of the throat.

Endoscopy is a significant tool for diagnosing many different health conditions. It is used to investigate symptoms like nausea, vomiting, abdominal pain, and gastrointestinal bleeding. Through biopsies, doctors can check for anemia, inflammation, and various cancers of the digestive system. The procedure can also be used for treatment, such as widening a narrow esophagus. While the procedure is generally safe, there are certain risks to consider. These include infection, over-sedation, or a perforation, which is a tear in the lining of the stomach or esophagus. Bleeding can also occur at the site of a biopsy, though this can often be controlled by cauterization.

US Navy 081117-N-7526R-568 Cmdr. Thomas Nelson and Lt. Robert Roadfuss discuss proper procedures while performing a laparoscopic cholecystectomy surgery
US Navy 081117-N-7526R-568 Cmdr. Thomas Nelson and Lt. Robert Roadfuss discuss proper procedures while performing a laparoscopic cholecystectomy surgery

After the procedure is finished, patients must be monitored in a recovery area. This is especially important if sedation was used, as the medication needs time to wear off. Some patients may experience a mild sore throat or a feeling of distention from the air used during the procedure. These effects are usually mild and go away quickly. Patients who did not receive sedation can often leave the facility unassisted. However, those who were sedated must be taken home by another person. They are typically instructed not to drive or handle machinery for the rest of the day.

Beyond the medical field, similar technology is used in many other areas. For non-medical purposes, instruments similar to endoscopes are called borescopes. These are used to inspect the inside of complex technical systems. In the world of architecture, a practice called architectural endoscopy is used to pre-visualize scale models of cities or buildings. Law enforcement officers also use endoscopes for surveillance in very tight spaces. Furthermore, bomb disposal personnel use these tools to examine improvised explosive devices safely. This shows how the ability to see into hidden spaces is useful in many different professions.

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🖼️ Images & Media (5)
File:PENTAX Colonoscope002.jpg
PENTAX Colonoscope002.jpg
File:Insertion tip of endoscope.jpg
Insertion tip of endoscope.jpg
File:Anoscope, proctoscope and rectoscope.svg
Anoscope, proctoscope and rectoscope.svg
File:US Navy 081117-N-7526R-568 Cmdr. Thomas Nelson and Lt. Robert Roadfuss discuss proper procedures while performing a laparoscopic cholecystectomy surgery.jpg
US Navy 081117-N-7526R-568 Cmdr. Thomas...
File:Esophageal Bougie Dilator.jpg
Esophageal Bougie Dilator.jpg
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