Marked loop-formation of the sigmoid colon makes difficult the advancement of a coloscope.
After straightening the sigmoid loops, the further advancement of the instrument is
facilitated. In some cases, the straightened loops re-form when the instrument is
further advanced. With the aid of a steel wire which is introduced into the instrument
channel of the fiberscope after the straightening process, renewed loop formation
can be advoided. In addition, the steel wire can also be used in the straightening
of the transverse colon.
Fibercoloscope - technique of coloscopy
