MEI is a new non-radiographical technique used in picturing the colonoscope shaft in real time.
A team from St. Mark's Hospital, Harrow, England assessed the use of MEI by trainees, and endoscopists with much experience of routine outpatient colonoscopy.
""MEI significantly improves colonoscopy performance, particularly when used by trainees, or experts in technically difficult cases." Dr Brian Saunders.
Two groups of patients were investigated. In Group 1, trainees examined 113 consecutive patients. MEI views were recorded in all examinations, but procedures were randomized. These were done by two trainees, either with the endoscopist and endoscopy assistants viewing the imager display (n=58), or without the imager view (n=55).
In Group 2, two skilled endoscopists were randomized (as with Group 1) to undertake 183 consecutive examinations, either with (n=92) or without (n=91) the MEI view.
MEI views of all procedures were analyzed retrospectively.
In both groups, when the endoscopist was able to see the imager view, intubation times were shorter (median 11·8 min vs. 15·3 min [Group 1]; 8·0 min vs. 9·3 min [Group 2]), and the number of attempts at straightening the colonoscope fewer (median 5 vs. 12 [Group 1]; 7 vs. 10 [Group 2]).
In Group 1, colonoscopy completion rates were also higher (100% vs. 89%), and duration of looping was reduced, (median 3 min vs. 5.4 min) when the imager could be seen.
Abdominal hand pressure was more effective when the endoscopist and endoscopy assistant could see the imager view.
Researcher Dr Brian Saunders said, "MEI significantly improves performance of colonoscopy, particularly when used by trainees, or by experts in technically difficult cases; loops were straightened or controlled effectively, resulting in quick intubation times and high completion rates."