Endoscope
First Claim
1. An endoscope comprising:
- an elongated insertion unit to be inserted into a body cavity or the like;
an observation window included in the distal part of said insertion unit and having an objective optical system, which offers a predetermined field of view that defines a view image, mounted thereon;
a treatment instrument passage channel which lies through said insertion unit and through which a treatment instrument is passed; and
a treatment instrument swing stand located near the distal opening portion of said treatment instrument passage channel, and permitting the distal part of the treatment instrument to move in both the rightward and leftward directions of said endoscope with a centerline, which bisects the field of view in the rightward and leftward directions, as a border.
3 Assignments
0 Petitions
Accused Products
Abstract
A treatment instrument passage channel through which a treatment instrument can be passed lies through an elongated insertion unit that is inserted into a body cavity or the like. The distal opening of the treatment instrument passage channel opens onto the distal part of the insertion unit. A treatment instrument swing stand having a hole, through which the distal part of a treatment instrument led out of the distal opening is passed, bored therein is disposed near the distal opening so that the treatment instrument swing stand can swing freely. The treatment instrument swing stand is manipulated by proximally pulling angling wires. Thus, the distal part of the treatment instrument is swung from a position near the center of a field of view in both the rightward and leftward directions of an endoscope. Thus, the mucosa of a lesion can be resected easily while being caught in the field of view.
108 Citations
25 Claims
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1. An endoscope comprising:
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an elongated insertion unit to be inserted into a body cavity or the like;
an observation window included in the distal part of said insertion unit and having an objective optical system, which offers a predetermined field of view that defines a view image, mounted thereon;
a treatment instrument passage channel which lies through said insertion unit and through which a treatment instrument is passed; and
a treatment instrument swing stand located near the distal opening portion of said treatment instrument passage channel, and permitting the distal part of the treatment instrument to move in both the rightward and leftward directions of said endoscope with a centerline, which bisects the field of view in the rightward and leftward directions, as a border. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. An endoscope comprising:
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an elongated insertion unit to be inserted into a body cavity;
an observation window included in the distal part of said insertion unit and having an objective optical system, which offers a predetermined field of view that defines a view image, mounted thereon;
first and second treatment instrument passage channels which lie through said insertion unit and through which first and second treatment instruments are passed;
a treatment instrument swing stand located near the distal opening portion of said first treatment instrument passage channel, and permitting the distal part of a first treatment instrument to swing in both the rightward and leftward directions of said endoscope with a centerline, which bisects the field of view in the rightward and leftward directions, as a border. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24)
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25. An endoscope system comprising:
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an endoscope comprising;
an elongated insertion unit to be inserted into a body cavity or the like;
an observation window included in the distal part of said insertion unit and having an objective optical system, which offers a predetermined field of view that defines a view image, mounted thereon;
a treatment instrument passage channel which lies through said insertion unit and through which a treatment instrument is passed;
a treatment instrument swing stand that is located near the distal opening portion of said treatment instrument passage channel, and that permits the distal part of a treatment instrument to swing in both the rightward and leftward directions of said endoscope with a centerline, which bisects the field of view in the rightward and leftward directions, as a border; and
an imaging device that is located at the position of the image plane of said objective optical system and that photoelectrically converts an optical image;
a signal processing unit connected to said imaging device and performing signal processing; and
a display device on which an image picked up by said imaging device is displayed according to a video signal received from said signal processing unit.
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Specification