A cavitoscope with a flexible, remotely controlled distal end permits controlled targeting of a field to be visualized within a patient. The cavitoscope incorporates a hinged distal end remotely operable by an extensible cable that pushes on the distal end to cause it to angle away from the axis of the...http://www.google.ca/patents/US5318008?utm_source=gb-gplus-sharePatent US5318008 - Controlled targeting cavitoscope
