What is nasal gastroscopy?
The upper gastrointestinal endoscope is an excellent medical device that can remove cancer without laparotomy at an early stage, in addition to having accuracy in diagnosis. The only disadvantage is the pain suffered by the patient.
In 1996, a French endoscopist requested Fujinon to “develop a narrow electrical endoscope that can be inserted through the nose, because anesthesia to ease the patient of pain leads to increased medical expenditure.” Medical expenditure control is also an important issue in Japan.
At that time, there was no compact CCD for an endoscope of 6 mm or smaller to be inserted through the nose. In 2001 (5 years later), we developed a very narrow electric upper gastrointestinal endoscope EG-270/470N, with an outside diameter of 5.9 mm, to be inserted through the nose. In 2005, we newly developed the EG-530N, equipped with an ultracompact super CCD honeycomb, as a successor to the EG-470N.

Nasal insertion

Oral insertion

Advantages of nasal gastroscopy
Advantages of nasal insertion to patients 1

Advantages of nasal insertion to patients 2
Able to undergo endoscopy while talking = able to relax
Advantages of nasal insertion to patients 3
Return to work immediately after endoscopy =
  able to eat and drink
Return home by driving a car

Advantages of nasal insertion to DR
Obtaining a wide repute of “this hospital performs painless endoscopy” → Increased  
 number of patients undergoing endoscopy
Able to perform endoscopy while explaining to the patient
 (able to omit postendoscopic explanation → shortened time)
Patients' painlessness leads to physicians' stresslessness.
No worry about an accident due to sedation

Data 1: Increased number of GIFs and the results of a questionnaire
     (data by Dr. Miyawaki, Izumo Central Clinic)
Year Number
1993 304
1994 392
1995 465
1996 503
1997 616
1998 733
1999 589
2000 629
2001 715
2002 915
2003 1177
2004 1246

Increasing rate after initiation of nasal endoscopy: 28 29%

Results of the questionnaire - Future desire: oral or nasal
 N=1876 (2002.2.4 ∼ 2004.5.7)

Data 2: Comparison between nasal examination and sedation


Nasal examination


Degree of pain



Necessity for monitoring

No Yes

Necessity for an anesthesiologist

No Yes

Hospital stay

Short (about an hour) Long (about 3 hours)



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