Surgery – Endoscope – Urological
Patent
1998-07-13
2000-03-21
Leubecker, John P.
Surgery
Endoscope
Urological
A61B 106
Patent
active
060396873
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION
1. Technical Field
The present invention relates to a rectoscope for, in particular, the examination of the rectum according to the generic part of claim 1.
2. State of the Art
Generic type rectoscopes, manufactured by way of illustration by Karl Storz GmbH & Co, KG, Tuttlingen, Germany, have a wide-lumen tube the distal end of which can be inserted, for instance, into the rectum.
Furthermore, an illumination device is provided, the light of which is coupled proximally or distally into the wide-lumen tube. The examining person views the to-be-examined area of the rectum through the open proximal end of the wide-lumen end without any additional auxiliary viewing devices, such as a microscope or the like.
Therefore, the known generic type rectoscopes have the disadvantage that viewing of the to-be-examined area of the rectum occurs with the naked eye. Thus, the examining person is unprotected, for instance, against splattering blood. More important, however, viewing does not deliver a high-contrast image, in particular, if the examining person wears eyeglasses, due to the interference of reflections of the illumination light from the inside wall of the wide-lumen tube.
DESCRIPTION OF THE INVENTION
The object of the present invention is to further develop a rectoscope according to the generic part of claim 1 in such a manner that a high-contrast image of the to-be-examined area is obtained obviating the use of a distal optic which can easily soil and, moreover, takes up a part of the distal tube lumen so that it cannot be utilized for instruments.
A solution to this object according to the present invention is set forth in claim 1. Further embodiments of the present invention are the subject matter of claims 2 and the following claims.
An element of the present invention is that a viewing optic, which can be focused on the central region of the distal opening of the tube, is attached at the proximal end of the wide-lumen tube. This viewing optic, the focus plane of which lies in the region of the distal opening, yields a high-contrast image, because due to the focusing of the opening, the reflections of the illumination light from the semi-reflecting inside wall of the tube no longer interfere. It is especially advantageous if the enlargement of the viewing optic is selected in such a manner that the viewer only sees the distal opening and, if need be, a small part of the distal end of the tube.
In a preferred embodiment of the present invention the focus plane of the viewing optic is adjustable. In this way, the regions outside the plane in which the distal opening of the rectoscope is located can also be viewed sharply.
In principle, any optics can be employed as the viewing optics as long as they permit, with a terminal window of the viewing optic disposed in the region of the proximal end of the rectoscope, observation respectively viewing of the distal end of the rectoscope.
However, it is especially advantageous if the observation optic is an endoscope, the length of which is dimensioned in such a manner that it projects only partly into the wide-lumen tube so that the endoscope lens (still) is disposed in the proximal region. Thus the viewing optic can be constructed in a simpler and therefore more economical manner of endoscope components already available for other purposes.
Furthermore, the beam path can be bent in a simple manner in such a way that the eyepiece forming an angle with the axis of the tube does not hinder free access to the proximal end of the rectoscope.
Free access to the proximal end is further facilitated by the viewing optic being disposed eccentric in relation to the wide-lumen tube.
In particular, the viewing optic can be attached via a standard coupling to a flange which is provided with at least one instrument. Due to the fact that both the viewing optic and the illumination device are located in the proximal region of the wide-lumen tube, this instrument can be moved unhindered over the entire region of the distal opening of the tube and can simultaneously be
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Karl Storz GmbH & Co. KG
Leubecker John P.
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