Abstract
Some colonoscopy training models appear on the market. These models are very natural and useful but very expensive.
We developed a simple and inexpensive handmade model for colonoscopy training. This model is made of familiar materials such as a cardboard plate, a paper spindle of paper sheets role and a office clip. The paper pipe is fixed at the center of the base plate. And a target “chessman” which is made of an office clip and a drawn figure is set on the plate. A colonoscope is inserted to the pipe. Then a trainee catches the “chessman” in the sight of colonoscope and try to rotate the chessman 360 degrees in the sight without losing the sight of it.
To do well this procedure, a good coordination between the rotation of colonoscope and up-down/
right-left angle knob manipulation is required. For example, the target located at θdegrees to the shaft of the colonoscope. During a 180 degree rotation, the up-down angle shifts θ°→ 0°→－θ°and the right-left angle shifts 0°→θ°→ 0°continuously.
Though it is difficult for beginners to manipulate the two angle knobs by only the left hand, advanced colonoscopists perform them with facility and unconsciously.
The coordination between the rotation of colonoscope and up-down/right-left angle knob manipulation contributes not only to control the target such as a polyp to good location in the sight of colonoscope but also to achieve the smooth insertion of colonoscope.
Our model is suitable especially to practice the coordination between the rotation of colonoscope and angle knob manipulation.
We would appreciate it if our model could be helpful in instruction of colonoscopy.
