| filiform bougie | A very slender bougie usually used for gentle exploration of strictures or sinus tracts of small diameter where false passages can be encountered or created; the entering end can consist of either a straight or spiral tip, and the trailing end usually consists of a threaded cylinder into which the screw tip of a following bougie can be inserted. (05 Mar 2000) |
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| following bougie | A flexible tapered bougie with a screw tip which is attached to the trailing end of a filiform bougie, to allow progressive dilation without danger of creating false passages. (05 Mar 2000) |