JP5235547B2 - Endoscope hood - Google Patents

Description

  The present invention relates to an endoscope distal end hood and the like attached to an insertion tube distal end of an endoscope.

  A treatment method using an endoscope such as ESD (endoscopic submucosal dissection) is known. When performing ESD, a coloring pigment is sprayed on the lesion so that the lesion can be easily recognized (see, for example, Patent Document 1).

  An endoscope is usually provided with a forceps channel and a water supply channel. Then, a dye, a medicine, and the like are transferred to the distal end of the endoscope through the spray tube through which the forceps channel is inserted and the water supply channel, and sprayed near the lesioned part.

In addition, examples in which pigments, chemicals, water, and the like are released through a hood attached to the distal end of an insertion tube of an endoscope are also known (for example, Patent Documents 2 to 5). In these examples, water is supplied by a water supply tube that is detachable from the hood, or a water supply tube attached around the hood.
JP 2006-325867 A Japanese Patent No. 3998742 Japanese Patent Laid-Open No. 2003-220021 JP 2002-34993 A JP 2002-34997 A

  When using a forceps channel or the like of an endoscope to release a dye or a drug in a living body, the forceps channel or the like may be contaminated by the released dye or the like. Furthermore, when releasing a pigment | dye etc. from the forceps channel of an endoscope, a complicated operation may be required. This is because it may be necessary to repeat an operation of removing a treatment tool such as a forceps passing through the forceps channel from the forceps channel and passing the forceps channel again.

  In addition, when water is supplied to the hood by using a water supply tube that is detachable from the hood or attached to the periphery of the hood, the structure of the hood including the tube is complicated. In particular, a hood having a water supply tube or the like attached to the periphery is increased in size, which may cause problems in use in a narrow lumen. Furthermore, when the water supply tube etc. is detachable, there is a risk that the tube may come off inside the subject's body during observation of the lesion and during treatment, and the water supply tube etc. needs to be attached and detached. Can interfere with mirror observation.

  An object of the present invention is to realize an endoscope distal end hood that allows a fluid such as a pigment to be dispersed without polluting the endoscope, has a simple structure, and is excellent in safety and operability.

  The endoscope tip hood of the present invention is an endoscope tip hood attached to the tip of an insertion tube of an endoscope. The endoscope tip hood is a hood body provided with a discharge port for discharging a fluid substance, and a tube member that is integrally formed with the hood body and supplies the fluid substance to the inside of the hood body for discharge. It is characterized by comprising.

  In the endoscope front end hood, it is preferable that a container portion for accommodating the fluid substance supplied by the tube member is provided inside the hood main body, and the discharge port is an opening of the container portion. Moreover, it is preferable that the discharge member for discharging a fluid substance from a discharge port is connected to the edge part on the opposite side to the hood body of a tube member.

  The tube member preferably includes a tube main body and a reinforcing member that covers the periphery of the tube main body. The reinforcing member is, for example, a coil. In this case, it is more preferable that the reinforcing member further includes a protective cover that covers the periphery of the coil. The tube member preferably has a length that can be wound around the entire length of the insertion tube.

  In the endoscope front end hood, it is preferable that a plurality of discharge ports are provided over the entire circumference of the discharge end, which is the end opposite to the insertion tube to which the hood body is attached. In this case, an imaging optical system is provided in the insertion tube, and a plurality of discharge ports are provided at positions centered on the optical axis of the imaging optical system in a state where the endoscope tip hood is attached to the insertion tube. More preferably.

  The endoscope tip hood set of the present invention includes the above-described endoscope tip hood and a discharge member that is connected to the end of the tube member opposite to the hood main body and discharges the fluid substance from the discharge port. Prepare. In the endoscope front hood set, it is preferable to further include a fixing band for fixing the tube member along the insertion tube.

  According to the present invention, it is possible to disperse a fluid such as a pigment without contaminating the endoscope, and it is possible to realize an endoscope tip hood that has a simple structure and is excellent in safety and operability.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram illustrating a state in which the endoscope distal end hood of the first embodiment is attached to an insertion tube. FIG. 2 is a cross-sectional view of the endoscope distal end hood and the insertion tube cut along a plane along the longitudinal direction of the insertion tube. FIG. 3 is a cross-sectional view showing the syringe connected to the tube member of the endoscope front end hood.

  The endoscope distal end hood 10 is detachably attached to the distal end of the insertion tube 50 of the endoscope 40 in order to assist observation, treatment, and the like of a lesioned part. The endoscope 40 is provided with an operation unit 44 including a forceps port 42 and operation buttons for various operations. The endoscope tip hood 10 includes a cylindrical hood main body 12 and a tube member 20. A container portion 16 is provided inside the hood main body 12 (see FIG. 2). The container portion 16 temporarily stores a liquid pigment (fluid substance) such as indigo carmine and acetic acid supplied from the tube member 20.

  The pigment in the container part 16 is sprayed on the pathogenic part in order to color the affected part and improve its visibility. A plurality of discharge ports 12 </ b> M are provided on the distal end surface 12 </ b> S (discharge end portion) of the hood main body 12, that is, on the end surface opposite to the distal end surface 50 </ b> S of the insertion tube 50 to which the hood main body 12 is attached. The discharge port 12M is an opening of the container portion 16, and the dye in the container portion 16 is discharged to the outside from the discharge port 12M.

  In order to discharge the dye in this way, a syringe 30 (discharge member) is used (see FIGS. 1 and 3). The syringe 30 is detachably attached to the end 20E of the tube member 20 on the side opposite to the hood main body 12. The syringe 30 includes a piston 32 and a syringe 34. With the piston 32 removed from the syringe 34, the syringe 34 is filled with the dye.

  The pigment filled in the syringe 30 is supplied to the container portion 16 in the hood main body 12 through the tube member 20 by the pressure applied by the operation of the syringe 30. With this pressure, the pigment in the container portion 16 is discharged toward a lesioned portion or the like outside the hood main body 12.

  The tube member 20 includes a tube main body 22 through which a pigment or the like passes in the center (see FIG. 2). The tube main body 22 communicates with the discharge port 12M via the container portion 16. The tube body 22 is integrally formed of the same material as the hood body 12. Therefore, the tube member 20 is reliably prevented from being detached from the hood main body 12 due to the pressure for discharging the pigment, the contact with the body cavity of the hood main body 12, or the like.

  In addition, the discharge pressure of the pigment | dye from the discharge port 12M can be adjusted by providing the container part 16 and storing an appropriate amount of pigment | dyes etc. in the food | hood main body 12 temporarily. For example, the discharge pressure can be increased by enlarging the container portion 16 relative to the area of the discharge port 12M. In addition to the pigment, the fluid discharged by the syringe 30 and the endoscope tip hood 10 is useful for observing and treating a lesion, such as a medicine such as a hemostatic agent and water. It may be used.

  Since the syringe 30 is detachable from the tube member 20, for example, a syringe for a fluid different from the syringe 30, a syringe whose amount of fluid that can be filled in the syringe is different from the syringe 30, etc. It can be used selectively with the hood 10. Thus, in the endoscope tip hood set including the endoscope tip hood 10 and the syringe 30 of this embodiment, it is easy to selectively use various fluids in appropriate amounts.

  A coil 24 (reinforcing member) is wound around the tube body 22 (see FIGS. 2 and 3). The coil 24 covers substantially the entire surface of the tube body 22. The coil 24 prevents the tube member 20 from buckling, and can secure the bendability while increasing the strength. The periphery of the coil 24 is covered with a protective cover 26 (reinforcing member). By these members, the tube member 20 is excellent in strength and protected from body fluids and the like.

  The tube member 20 is fixed along the insertion tube 50 by a plurality of ring-shaped fixing bands 28. Therefore, the tube member 20 is curved together with the insertion tube 50 in the body cavity, and the tube member 20 separated from the insertion tube 50 is prevented from coming into contact with the inner wall (not shown) of the body cavity.

  The protective cover 26 on the surface of the tube member 20 is formed of, for example, a fluorine resin such as PTFE (polytetrafluoroethylene), a urethane resin, or the like. The surface of the insertion tube 50 is also made of these resins, for example. Preferably, the protective cover 26 and the surface member of the insertion tube 50 are formed of the same material that is safe and suitable for a living body. The hood body 12 may also be made of the same resin.

  FIG. 4 is a front view of the endoscope distal end hood 10 attached to the distal end of the insertion tube 50. 5 is a cross-sectional view of the endoscope hood 10 taken along the line VV in FIG.

  Hereinafter, the arrangement of the discharge port 12M and members inside the insertion tube 50 will be described. The plurality of discharge ports 12M are arranged at equal intervals along the entire circumference of the distal end surface 12S. This is because the pigment 32 and the like can be dispersed over a wide range by simply pressing the piston 32 (see FIG. 3) of the syringe 30 once.

  On the other hand, the insertion tube 50 is provided with an objective lens 52 and an image sensor 54 (both are photographing optical systems, see FIG. 2). Illumination light emitted from a light source (not shown) of a processor used with the insertion tube 50 is transmitted by a light guide (not shown) and emitted from the distal end surface 50S toward the object to be observed.

  The reflected light of the illumination light reflected by the observation object reaches the image sensor 54 through the objective lens 52, and an image signal is generated by the image sensor 54. The generated image signal is transmitted to the processor and subjected to predetermined processing. As a result, an image of the observation object based on the image signal is generated.

  The plurality of ejection openings 12M are arranged so that the optical axis O of the photographing optical system such as the image sensor 54 is at the center (see FIGS. 2 and 4). That is, the positions of the plurality of discharge ports 12M are adjusted so that all of them are on a virtual circle C centered on the optical axis O when the endoscope distal end hood 10 is attached to the insertion tube 50. . In this way, by arranging many discharge ports 12M around the optical axis O instead of the center line L of the insertion tube 50, it is easy for the user to perform a treatment while viewing the image of the observed object including the lesioned part. In addition, the pigment can be sprayed to the lesioned part reliably and reliably.

  Further, the hood main body 12 is provided with a thick region 12H that is thicker than other regions. The thick region 12H is formed to provide the tube member 20, and the tube member 20 extends from the base end surface 12A of the thick region 12H (see FIG. 2). The coil 24 and the protective cover 26 are embedded up to the inside of the hood main body 12 in order to securely protect the tube member 20. However, in order to enable the tube main body 22 and the hood main body 12 to be integrally formed, a container is used. It is not provided up to the position in contact with the portion 16.

As shown in FIG. 5, the container portion 16 has a ring shape arranged along the entire circumference of the distal end surface 12 </ b> S (see FIG. 2). The container portion 16 has a width region closer to the tube member 20 (see FIG. 2) is rather large, the width is less increasing distance from the tube member 20.

  As shown in FIG. 2, the inner wall surface 12B of the thick region 12H is inclined as indicated by a two-dot chain line D, and the thick region 12H is raised to the center side of the opening 12C of the hood body 12, thereby The advancing / retreating direction of the treatment tool such as the forceps 58 that passes through 56 can also be adjusted. In this case, the forceps 58 protruding from the forceps channel 56 advances to the optical axis O side as indicated by an arrow E. Therefore, the user who is grasping the lesioned part (not shown) at the center of the imaging screen can easily bring the forceps 58 close to the lesioned part.

  As described above, according to the present embodiment, since the pigment or the like is sprayed from the hood body 12 through the tube member 20 without using the forceps channel 56, the insertion tube 50 can be prevented from being soiled by the pigment or the like. Further, it is not necessary to remove the treatment tool such as the forceps 58 from the forceps channel 56 during the dispersion of the pigment or the like, and the operability can be improved.

  In addition, by providing the syringe member 30 connected to the tube member 20 in the vicinity of the forceps opening 42 (see FIG. 1) or with the operation unit 44, the tube member 20 is long enough to be operated by the user. An operation of spraying a pigment or the like at a desired timing during endoscopic observation or an operation of supplementing the pigment or the like for a large lesion is facilitated.

  Furthermore, the tube member 20 that supplies the pigment and the like is formed integrally with the hood body 12, thereby preventing the tube member 20 from being detached. In particular, the tube member 20 is not disposed along the outer peripheral surface of the hood main body 12 but is disposed along the longitudinal direction of the insertion tube 50 inside the thick region 12H (see FIG. 2). 12 and the tube member 20 are not exposed to the outside of the endoscope tip hood 10, so that the tube member 20 can be reliably prevented from being detached from the hood body 12, and the structure of the endoscope tip hood 10 is It has been simplified.

  Next, a second embodiment will be described. FIG. 6 is a cross-sectional view of the endoscope distal end hood 10 of the second embodiment corresponding to FIG.

  In the present embodiment, only the arrangement of the discharge ports 12M is different from the first embodiment. That is, in the first embodiment, the discharge port 12M is provided on the distal end surface 12S of the hood body 12 (see FIGS. 2 and 4), whereas in the present embodiment, the discharge port 12M is formed on the outer wall surface 12O of the hood body 12. Is provided. That is, the discharge port 12M of the present embodiment is perpendicular to the direction perpendicular to the optical axis O, that is, to the longitudinal direction of the insertion tube 50, with the endoscope tip hood 10 attached to the insertion tube 50. Facing the direction.

  Thus, by providing the discharge port 12M that discharges the dye in the direction indicated by the arrow F toward the outside of the outer wall surface 120, the endoscope distal end hood 10 of the present embodiment has a lumen (not shown). Suitable for internal use. In a narrow lumen, it is difficult to direct the distal end surface 50S of the insertion tube 50 to the wall surface of the lumen. In the present embodiment, the insertion tube 50 remains parallel to the lumen and the dye is removed from the lumen. This is because it can be sprayed on the wall surface.

  The first and second embodiments may be combined so that the plurality of discharge ports 12M can discharge the dye and the like in various directions. As described above, when the plurality of discharge ports 12M are arranged so that the dye can be discharged in different directions, it is particularly preferable to provide the container portion 16. In the hood main body not provided with the container portion 16, the structure of the fluid passage (tube main body 22) inside the hood main body becomes complicated, whereas a plurality of discharge ports that face various directions as the opening of the single container portion 16. This is because, when 12M is provided, the structure of the hood main body 12 is simplified and easy to manufacture.

  According to this embodiment, the endoscope tip hood 10 that is particularly suitable for a specific application can be realized by allowing the dye to be discharged in a direction perpendicular to the longitudinal direction of the inserted insertion tube 50.

  The shape, material, and the like of the endoscope tip hood 10 are not limited to any embodiment. For example, a tube member 20 that is sufficiently longer than the insertion tube 50 may be wound over the entire length of the insertion tube 50 as in a modification of the endoscope tip hood 10 shown in FIG. In this case, the length of the tube member 20 is, for example, about twice the length A of the insertion tube 50. The fixing band 28 included in the endoscope hood set using the long tube member 20 as described above has a slightly larger diameter than that of the first embodiment.

  The tube member 20 may be fitted into the separate hood main body 12 and firmly fixed and integrated. Further, the tube body 22 may be directly communicated with the discharge port 12M without providing the container portion 16. In this case, the discharge pressure is adjusted by adjusting the diameter or the like of the tube main body 22.

  Further, the thickness of the hood main body 12 may be made uniform without providing the thick region 12H (see FIGS. 2, 5, etc.). A check valve may be provided inside the discharge port 12M to prevent foreign matter from entering the container portion 16 through the discharge port 12M.

It is a figure which shows the state by which the endoscope front end hood of 1st Embodiment was attached to the insertion tube. It is sectional drawing of the endoscope front end hood and insertion tube which were cut | disconnected by the plane along the longitudinal direction of an insertion tube. It is sectional drawing which shows the syringe connected to the tube member of the endoscope front end hood. It is a front view of the endoscope front end hood attached to the front end of the insertion tube. It is sectional drawing of the hood for endoscope cut | disconnected by the VV line | wire in FIG. It is sectional drawing of the endoscope front end hood of 2nd Embodiment corresponding to FIG. It is a figure which shows the modification of an endoscope front end hood.

Explanation of symbols

10 Endoscope End Hood 12 Hood Body 12M Discharge Port 12S End Surface (Discharge End)
16 Container part 20 Tube member 24 Coil (reinforcing member)
26 Protective cover (reinforcing member)
28 Fixed band 30 Syringe (discharge member)
40 Endoscope 50 Insertion tube 52 Objective lens (imaging optical system)
54 Image sensor (photographing optical system)
O Optical axis

Claims (9)

An endoscope tip hood attached to the tip of an endoscope insertion tube,
A hood body provided with a plurality of discharge ports for discharging a fluid substance;
A tube member formed integrally with the hood body, for supplying and discharging the fluid substance into the hood body;
An internal view characterized in that an inside of the hood main body is provided with an annular container part for accommodating the fluid substance supplied by the tube member, and the discharge port is an opening of the container part. Mirror tip hood.   The endoscope distal end hood according to claim 1, wherein a discharge member for discharging the fluid substance from the discharge port is connected to an end portion of the tube member opposite to the hood main body. .   The endoscope distal end hood according to claim 1, wherein the tube member includes a tube main body and a reinforcing member that covers the periphery of the tube main body.   The endoscope distal end hood according to claim 3, wherein the reinforcing member includes a coil.   The endoscope distal end hood according to claim 4, wherein the reinforcing member further includes a protective cover that covers the periphery of the coil. 2. The plurality of discharge ports are provided over the entire circumference of a discharge end that is an end opposite to the insertion tube to which the hood main body is attached. Endoscope tip hood.   The endoscope tip hood according to claim 1, and a discharge member connected to an end of the tube member opposite to the hood main body and for discharging the fluid substance from the discharge port. Endoscopic hood set characterized by The endoscope tip hood set according to claim 7 , further comprising a fixing band for fixing the tube member along the insertion tube.   The endoscope tip hood set according to claim 1, wherein the container portion has a width that is larger in a region closer to the tube member and is smaller as the region is farther from the tube member.

Images