The instrument presented is the modification of my original one, previously described.1
Instead of having the light carrier channel (A) fixed to the sight tube (B) as in the original endoscope, it is here made movable, thereby serving the combined purpose of acting as a channel for the light carrier and as a lever for manipulating the safety-pin closing loop, thus permitting an entirely free sight tube in which to work.
Fig. 1.—Point up safety-pin in the esophagus of dog.
The instrument as it is, can be used not only for the purpose of closing safety-pins or extracting flat objects, especially the smooth kind that are hard to grasp with forceps, but also as a regular endoscope for diagnosis and treatment when the 4, 5 and 7 mm. tube is required.
When drawn down, the loop has the same circumference as the sight tube, thus eliminating any visual