JP2009082636A - Magnifying observation endoscope - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a magnifying observation endoscope acquiring a magnified observation image of good image quality by suppressing the movement between the surface of a mucous membrane and an observation window for magnifying observation without discharging the air in the body cavity and damaging intracorporeal mucous membranes at the time of magnifying observation. <P>SOLUTION: In the magnifying observation endoscope constituted by providing an observation window 8 for magnifying observation to the leading end part main body 2 connected to the leading end of an insertion part 1, the annular suction disc 20a pressed to the intracorporeal mucous membrane to be adsorbed and fixed on the intracorporeal mucous membrane is provided to the leading end part main body 2 in a state of containing the observation window 8 for magnifying observation inside. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a magnification observation endoscope in which a magnification observation observation window for capturing a magnification observation image is provided at the distal end of an insertion portion.

  A technique for inspecting the presence or absence of a lesion by visually observing the inside of a luminal organ in the body with an endoscope is widely performed. In recent years, for example, a magnifying endoscope such as a confocal endoscope capable of magnifying microscopically a range of less than 1 mm has been developed. It has become possible to make a definitive diagnosis of whether or not it is cancer only by direct observation with a mirror.

  Such a magnifying observation endoscope has a normal observation observation window for capturing an observation image of a subject from a position at a distance from the subject on the distal end surface of the distal end main body constituting the distal end of the insertion portion. The distal end of the distal end protruding portion that is arranged and has an observation window for magnifying observation partially protruding forward from the distal end surface of the distal end main body for capturing a magnified observation image of the subject while the surface is in contact with the subject. It arrange | positions on the surface (for example, patent document 1, 2).

  Such microscopic magnification observation by the magnification observation endoscope is performed in a state in which the observation window for magnification observation is in close contact (or in close proximity) to the body mucous membrane as a subject. However, since the surface of the observation window is easy to slide with respect to the mucous membrane in the body, simply pressing the observation window against the mucous membrane in the body causes blurring of the subject. It will deteriorate significantly.

Therefore, conventionally, a suction port is arranged around the observation window for magnified observation, and when performing microscopic magnified observation, the suction port is adsorbed to the mucosal surface, so that the gap between the mucosal surface and the observation window for magnified observation is reduced. (For example, Patent Document 3).
JP 2004-344201 A JP-A-2005-80769 JP2007-263

  However, if aspiration is performed in a body cavity, the air in the body cavity is aspirated and exhausted and the organ to be observed is deflated unless the suction port is completely adsorbed to the mucosal surface. The observation and guidance itself will be a big hindrance. In addition, if the suction port is adsorbed to the mucosal surface in a state of continuous suction, tissue on the mucosal surface is damaged and inflamed, and bleeding may occur if the adsorbed state lasts for a long time.

  The present invention suppresses blurring between the mucosal surface and the observation window for magnification observation without discharging air in the body cavity or damaging the mucous membrane in the body during magnification observation, and a magnified observation image with good image quality An object of the present invention is to provide a magnifying observation endoscope that can acquire the above.

  In order to achieve the above object, the magnifying observation endoscope of the present invention is a magnifying observation endoscope in which an observation window for magnifying observation is provided on the distal end body connected to the distal end of the insertion portion, and is pressed against the mucous membrane in the body. Thus, the annular suction cup that is adsorbed and fixed to the mucous membrane in the body is provided in the distal end portion main body so as to include the observation window for magnification observation inside.

  The suction cup is elastically deformed in the direction opposite to the pressing direction by the action of being pressed against the mucous membrane of the body, and when the pressing action is released, the suction cup tries to return to the shape before the elastic deformation, so that the space surrounded by the suction cup The suction cup may be adsorbed and fixed to the mucous membrane in the body due to negative pressure.

  Moreover, the suction cup may be formed in the shape which extended toward the front side at the front-end | tip side of a trumpet with the elastic material, and the suction cup may be attached to the front-end | tip part main body so that attachment or detachment is possible.

  According to the present invention, the annular suction cup that is adsorbed and fixed to the mucosa of the body by being pressed against the mucosa of the body is provided on the distal end body in a state including the observation window for magnifying observation on the inner side, so In addition, it is possible to obtain a magnified observation image with good image quality by suppressing blurring between the mucosal surface and the observation window for magnified observation without discharging air in the body cavity or damaging the mucous membrane in the body.

  In the magnifying observation endoscope in which the observing window for magnifying observation is provided in the distal end main body connected to the distal end of the insertion part, the annular sucker that is adsorbed and fixed to the mucous membrane in the body by being pressed against the mucosa in the body is used for observing for magnifying observation The tip portion main body is provided so as to include a window inside.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a side sectional view of the distal end portion of the insertion portion 1 of the magnifying observation endoscope. The distal end surface 2a of the distal end portion body 2 connected to the most distal end portion of the insertion portion 1 formed in a flexible tubular shape is shown in FIG. An observation window 3 for normal observation, an illumination window (not shown), an air / water supply nozzle, and the like are arranged.

  In the observation window 3 for normal observation, an objective optical system 4 for obtaining a wide viewing angle (for example, about 100 ° to 140 °) is arranged, and the solid-state imaging device 5 is located at the projection position of the subject by the objective optical system 4. The imaging surface is arranged. Reference numeral 6 denotes a signal cable for transmitting an imaging signal obtained by the solid-state imaging device 5.

  An enlargement for capturing an observation image of the internal mucosa on the distal end surface of the distal end protruding portion 7 that partially protrudes forward from the distal end surface 2a of the distal end main body 2 while being in close contact with or in close proximity to the surface of the in vivo mucosa as a subject. An observation window 8 for observation is arranged facing forward.

  A confocal optical system 9 is arranged in the observation window 8 for magnification observation of this embodiment, and the position of the distal end face of the optical single fiber 10 arranged so as to be scanned two-dimensionally in the back thereof. And the position of the outer surface of the observation window 8 for magnification observation (or a position slightly in front of it) are set to have a confocal positional relationship.

  The tip surface of the optical single fiber 10 is two-dimensionally scanned on a plane perpendicular to the optical axis of the confocal optical system 9 by a scanning mechanism 11 using, for example, electromagnetic force, and transmitted through the optical single fiber 10. When the laser beam emitted from the distal end surface is focused and reflected by a subject near the outer surface of the observation window 8 for magnified observation, the reflected light is focused on the distal end surface of the optical single fiber 10. . Note that when a fluorescent dye is applied to the mucous membrane of the body, the fluorescence excited by the laser beam becomes the subject.

  Therefore, the reflected light returned to the proximal end side through the optical single fiber 10 is displayed at a position corresponding to the scanning movement of the distal end surface, so that the object near the surface of the observation window 8 for magnification observation is about 1 mm or less. A sharp microscopic magnified image of an area (for example, an area of 0.5 mm) can be obtained. It should be noted that the optical system in the observation window for magnification observation 8 does not use the confocal optical system 9 in which the tip surface of the optical single fiber 10 is used as a substitute for a pinhole, so-called normal magnification observation optical system is used for microscopic magnification observation. Even if it is made to be able to do.

  Reference numeral 20 denotes an annular sucker member that is detachably attached to the distal end body 2 so as to surround the outer periphery of the distal end body 2. The suction cup member 20 is formed of a rubber material or a polymer material having elasticity, and an annular protrusion 21 formed so as to protrude inward from the entire circumference of the inner peripheral surface in the vicinity of the rear end portion thereof. The suction cup member 20 is attached to the tip portion main body 2 by engaging with the circumferential groove 12 formed on the entire outer peripheral surface of the tip portion main body 2.

  Then, the suction cup member 20 is elastically deformed, the engagement between the annular protrusion 21 and the circumferential groove 12 is disengaged, and the suction cup member 20 is moved to the front of the tip end body 2, whereby the suction cup member 20 is moved from the tip end body 2. The suction cup member 20 can be attached to the tip end body 2 by the reverse operation.

  The tip portion 20 a of the suction cup member 20 protrudes slightly forward (for example, about 2 to 7 mm) from the surface of the observation window 8 for magnification observation, and the observation window 8 for magnification observation is located inside the tip portion 20 a of the suction cup member 20. It is included.

  The vicinity of the tip portion 20a of the suction cup member 20 is formed in a shape that widens toward the front side in the shape of a trumpet, and can be adsorbed and fixed to the mucosa in the body by being pressed against the mucosa in the body. Therefore, it can be said that the tip portion 20a of the suction cup member 20 is a suction cup.

  2 and 3 show changes in the operation in which the suction cup member 20 is pressed against the body mucous membrane. As shown in FIG. 2, when the distal end portion 20a of the suction cup member 20 is pressed against the body mucosa over the entire circumference, By this operation, the tip portion 20a of the suction cup member 20 is elastically deformed in the direction opposite to the pressing direction while spreading outward, and the volume of the space A surrounded by the tip portion 20a of the suction cup member 20 becomes very small.

  Then, when the pressing operation is released as shown in FIG. 3, the tip portion 20a of the suction cup member 20 is surrounded by the tip portion 20a of the suction cup member 20 by trying to return to the original shape before elastic deformation. The volume of the space A expands and the space A becomes negative pressure. As a result, the distal end portion 20a of the suction cup member 20 is adsorbed and fixed to the body mucous membrane. In addition, it was confirmed by experiments using mouse large intestine mucosa and porcine endothelial mucosa that sufficient adsorbing power was produced.

  In this way, the distal end main body 2 is fixed to the mucous membrane in the body, and the blur between the mucosal surface and the observation window 8 for magnifying observation is performed without discharging air in the body cavity or damaging the mucous membrane in the body. And an enlarged observation image with good image quality can be acquired, and the observation can be stably continued even for a long time. Moreover, the state can be easily reproduced even after the observation is interrupted.

  For example, if air is supplied into the space A from an air supply nozzle (not shown) for blowing air onto the surface of the observation window 3 for normal observation, the pressure in the space A rises and is adsorbed to the mucosa in the body. Can be resolved promptly.

It is side surface sectional drawing of the front-end | tip part of the insertion part of the expansion observation endoscope of the Example of this invention. It is side surface sectional drawing of the use condition of the front-end | tip part of the insertion part of the expansion observation endoscope of the Example of this invention. It is side surface sectional drawing of the use condition of the front-end | tip part of the insertion part of the expansion observation endoscope of the Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Insertion part 2 Tip part main body 8 Observation window for magnification observation 20 Suction cup member 20a Tip part (suction cup)
A space

Claims (4)

In the magnifying observation endoscope in which the observation window for magnifying observation is provided in the distal end body connected to the distal end of the insertion part,
An enlarged observation endoscope characterized in that an annular sucker that is adsorbed and fixed to the internal mucosa by being pressed against the internal mucosa is provided in the distal end portion main body so as to include the enlarged observation observation window inside. .   The suction cup is elastically deformed in the direction opposite to the pressing direction by the action of being pressed against the mucous membrane of the body, and when the pressing action is released, the suction cup attempts to return to the shape before the elastic deformation, thereby being surrounded by the suction cup. The magnifying observation endoscope according to claim 1, wherein said space is negatively pressured and said suction cup is adsorbed and fixed to said body mucous membrane.   The magnifying observation endoscope according to claim 1 or 2, wherein the suction cup is formed in a shape that widens toward the tip side of a trumpet with a resilient material.   The magnification observation endoscope according to claim 1, wherein the suction cup is detachably attached to the tip body.

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