Background and Study Aims: This study was designed to assess the usefulness of variable-stiffness
video colonoscopes, compared with conventional videoscopes.
Patients and Methods: The first prototype XCF-QAY1 and the latter prototype XCF-Q240AI
used in this study can be varied to 4 levels of stiffness of tube insertion during
examination. In 352 consecutive colonoscopic examinations performed using these and
two conventional scopes, the following data were recorded: time for intubation to
the cecum, frequency of changes in the patients' posture, frequency of abdominal pressure
attempts, and pain score. The degree of stiffness of the insertion tube and the examiners'
impressions score were recorded only in procedures where the variable-stiffness scopes
were used.
Results: There was no significant difference between colonoscopes in the pain score.
Total colonoscopy rate was 97.4 %. The frequency of usage of the varying stiffness
control in the colon according to site was as follows: descending colon, 57.3 %; transverse
colon, 32.8 %, sigmoid colon, 7.6 %; and ascending colon, 2.3 %. A significant difference
in the mean time for intubation to the cecum between the XCF-Q240AI and conventional
scopes was observed. Moreover, there were significant differences in the frequency
of abdominal pressure attempts and changes in the patient's posture between conventional
scopes and the new scopes.
Conclusions: These results suggest that only one scope, the XCF-Q240AI, is needed
for any colonic examination by any examiner.
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T. Odori, M.D.
Second Dept. of Internal Medicine
Nagoya University School of Medicine
65 Tsurumai-cho, Showa-ku
Nagoya City
466-0065 Aichi
Japan
Fax: Fax:+ 81-52-744-2175
Email: E-mail:hgoto@tsuru.med.nagoya-u.ac.jp