A new colonoscope has been developed, designed with an additional passive bending function to ease intubation through the left colonic flexure.
Dr Hoff and colleagues from Norway investigated whether this function could be included in a standard colonoscope.
The researchers assessed whether it could be included without jeopardizing general performance, particularly passage through the sigmoid colon.
The research team included 280 outpatients referred for routine colonoscopy at Telemark Hospital.
The patients were randomly allocated to colonoscopy with a standard colonoscope or the XCF-Q160AW prototype.
|Cecal intubation rates were 85 % for standard and 87% for prototype endoscopes|
Sedation was given on demand.
The researchers' end points were cecal intubation and the patients' grading of pain in a questionnaire.
Cecal intubation rates were 85 % and 87 % for standard and prototype endoscopes, respectively.
The team noted that on-demand sedation was given to 7 % and 11 % of the patients, respectively.
Of the patients, 85 % returned their questionnaire, with 63 % in the standard group and 77 % in the prototype group.
The researchers observed that the patients had experienced ‘no pain/slight pain'.
In a multiple logistic regression analysis, this difference in experienced pain remained significant after adjustment for interendoscopist variation.
The results also remained the same after the team adjusted for the use of the endoscope-stiffening function.
The research team reported that 2 patients in the study had previous several unsuccessful attempts at negotiating the splenic flexure.
The team now found that they were successfully examined with the prototype colonoscope.
Dr Hoff's team concluded, “Examination with the Olympus XCF-Q160AW prototype with a passive bending function caused less pain than use of a standard Olympus 140 series colonoscope, without compromising other endoscope functions for colonic intubation.”