JP2009273592A - Endoscope hood - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an endoscope hood for improving the operability of a treatment instrument without limiting the advancement/retraction of the treatment instrument. <P>SOLUTION: The endoscope hood 10 is detachably attached to the distal end of an insertion tube 50. The endoscope hood 10 has a thin plate-like projection part 18 to project inward from a body plate 12 into a treatment instrument passage hole 14. The body plate 12 includes a guide part 20. The diameter ϕ<SB>1</SB>of forceps 60 is approximately equal to the distance between end faces 12S and 20S of the body plate 12, and larger than the distance ϕ<SB>2</SB>between the projection part 18 and the guide part 20. The body plate 12 including the projection part 18 is formed of a resin with appropriate hardness and flexibility. The distal end of the projection part 18 is elastically deformed as the forceps 60 move. Accordingly, the forceps 60 passing through a forceps channel 56 are held with appropriate force by the projection part 18, etc. so that the forceps can advance/retract from the distal end face 54 and can rotate. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an endoscope hood, and more particularly to an endoscope hood that can be attached to the distal end of an insertion tube of an endoscope.

  When observing an affected part or the like in a subject's body with an endoscope apparatus, it is generally possible to treat the affected part with forceps or the like extending from the distal end surface of an insertion tube inserted into a body cavity. The treatment tool including the forceps and the like is advanced and retracted from the distal end surface through an insertion channel provided in the insertion tube by a user operation.

  In some cases, a hood for endoscopic observation or assisting treatment of an affected area may be attached to the distal end of an insertion tube of an endoscope in which a treatment tool can be used. By using the hood, for example, it is possible to observe and treat the affected area while maintaining a constant distance from the distal end surface of the insertion tube to the object to be observed such as the affected area, or to easily remove the affected area by sucking the affected area. Become.

As such a hood, a locking portion is provided around the passage for advancement and retreat of the treatment instrument to prevent the treatment instrument from being taken out excessively (for example, Patent Document 1), or the outer periphery of the distal end surface of the insertion tube to be attached There is known a taper shape that extends from the side of the hood and guides the treatment instrument toward the opening at the top of the hood (for example, Patent Document 2).
JP 2007-82767 A JP 2006-325867 A

  The hood provided with a locking portion around the passage through which the treatment tool passes allows the treatment tool to advance and retreat only up to a predetermined range and limits the direction of advancement and retraction, thereby reducing the operability of the treatment tool. Further, a tapered hood that guides the treatment tool and protrudes from the opening at the distal end of the hood also limits the direction of the treatment tool within the range of the opening.

  An object of this invention is to implement | achieve the endoscope hood which does not restrict | limit the advance / retreat of a treatment tool, but improves the operativity of a treatment tool.

  The endoscope hood of the present invention is detachably attached to the distal end of the insertion tube of the endoscope in which the treatment instrument advances and retreats from the distal end surface. The endoscope hood is provided with a passage hole through which the treatment instrument passes, and when the endoscope hood is attached to the insertion tube, a body plate that covers the distal end surface, and a protrusion that projects from the body plate to the inside of the passage hole And a treatment tool that passes through the passage hole is held by the protrusion so as to be able to advance and retreat.

  In the projection, it is preferable that a notch is provided on the passage hole side. It is preferable that the main body plate has a guide portion including an end surface on the passage hole side of the main body plate, and the end surface of the guide portion is inclined so as to project the treatment instrument passing through the passage hole in a predetermined direction. In this case, it is more preferable that the protruding portion is plate-shaped and the guide portion is thicker than the protruding portion.

  It is preferable that the protruding portion has a plate shape thinner than the main body plate. Moreover, it is preferable that the main body plate has a front surface that is a surface opposite to the front end surface when the endoscope hood is attached, and the protrusion is provided on the front surface side of the main body plate.

  The main body plate is preferably provided with a groove in contact with the protrusion. The main body plate is preferably provided with a fluid passage hole for sucking the fluid in the space of the endoscope hood into the insertion tube.

  The protrusion preferably has a knife edge shape.

  According to the present invention, it is possible to realize an endoscope hood that improves the operability of the treatment instrument without limiting the advancement and retreat of the treatment instrument.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram illustrating an endoscope in which the endoscope hood according to the first embodiment is used. FIG. 2 is a perspective view illustrating a distal end surface of the endoscope according to the first embodiment.

  The endoscope 40 is a part of an electronic endoscope system (not shown) and includes an operation unit 48 having operation buttons such as an air / water supply button 42 and a suction button 44. The endoscope 40 further includes a flexible insertion tube 50 that is inserted into the body cavity of the subject.

  The distal end surface 54 of the insertion tube 50 is provided with an opening of a forceps channel 56, an objective lens 58, and an opening of a light guide 62 and an air / water supply nozzle 63 (see FIG. 2). The forceps channel 56 is a passage of forceps (not shown), and the forceps can advance and retreat from the distal end surface 54.

  FIG. 3 is a front view showing the endoscope hood of the present embodiment. FIG. 4 is a cross-sectional view showing the endoscope hood cut along the line IV-IV in FIG. 3 and the insertion tube 50 with the endoscope hood attached thereto. FIG. 5 is an enlarged front view showing the vicinity of the treatment instrument passage hole of the endoscope hood according to the present embodiment.

  Illumination light is emitted from a light source (both not shown) of the processor of the electronic endoscope system. The illumination light is transmitted by the light guide 62 (see FIG. 2) and is emitted from the distal end surface 54 toward the object to be observed. The reflected light of the illumination light reflected by the object to be observed reaches the image sensor 66 (see FIG. 4) via the objective lens 58, and an image signal is generated by the image sensor 66. The generated image signal is transmitted to the processor and subjected to predetermined processing. As a result, an image of the object to be observed based on the image signal is displayed on a monitor (not shown).

  At the distal end of the insertion tube 50, an endoscope hood 10 for assisting observation, treatment, etc. of the affected part is detachably attached. The endoscope hood 10 is attached to the distal end of the insertion tube 50 so as to cover the distal end surface 54 of the insertion tube 50. For this reason, in the main body plate 12 of the endoscope hood 10 that covers the distal end surface 54 at the time of attachment, in addition to the treatment tool passage hole 14 (passage hole) through which the forceps 60 (treatment tool, see FIG. 4) passes, the objective lens 58 is also provided. In addition, first to third passage holes 15 to 17 are provided (see FIG. 3) so as not to block the openings of the light guide 62 and the air / water supply nozzle 63 (see FIG. 2). The treatment instrument passage hole 14 and the first to third passage holes 15 to 17 are provided at positions corresponding to the opening of the forceps channel 56 and the like on the distal end surface 54.

  The endoscope hood 10 includes a tapered portion 22 and a proximal end portion 24 (see FIG. 4). When the tapered portion 22 is pressed against an object to be observed such as an affected area, it is possible to observe and treat the object while maintaining a constant distance from the distal end surface 54 (see FIGS. 1 and 2) to the object to be observed. In addition, the affected part collected and aspirated can be held in the concave part 22U of the tapered part 22. The hardness and size of the base end portion 24 are adjusted so that the endoscope hood 10 is securely attached to the distal end of the insertion tube 50.

  In the endoscope hood 10, a protrusion 18 that protrudes inward from the main body plate 12 to the treatment instrument passage hole 14 is provided. As shown in FIG. 4, the protrusion 18 has a plate shape that is significantly thinner than the main body plate 12. The protrusion 18 is provided on the front surface 12F side of the main body plate 12. The front surface 12 </ b> F of the main body plate 12 is a surface of the main body plate 12 that is located on the opposite side of the distal end surface 54 when the endoscope hood 10 is attached to the insertion tube 50. As shown in FIGS. 3 and 5, the protrusion 18 has a base 18 </ b> A protruding from the wall surface of the treatment instrument passage hole 14 and an arc-shaped arm 18 </ b> B along the periphery of the treatment instrument passage hole 14.

  The main body plate 12 includes a guide portion 20. The guide portion 20 is a peripheral region of the treatment instrument passage hole 14 in the main body plate 12 and is located at a position substantially opposite to the projection portion 18. The guide portion 20 includes an end surface 20S on the treatment instrument passage hole 14 side. Since the forceps 60 are advanced and retracted while being held by the protrusion 18 while being in contact with the end surface 20S, the advancing and retreating direction of the forceps 60 is determined by the protrusion 18 and the guide part 20.

  In the present embodiment, the shapes of the protrusion 18 and the guide 20 are adjusted so that the forceps 60 advance and retract along a direction parallel to the central axis 50A of the insertion tube 50 (a direction perpendicular to the distal end surface 54). . That is, the end surface 12S of the main body plate 12 and the end surface 20S of the guide portion 20 are both perpendicular to the front surface 12F of the main body plate 12 and perpendicular to the front end surface 54 when the endoscope hood 10 is attached. 56 in parallel.

The diameter φ _{1 of the} forceps 60 is naturally smaller than the diameter φ _{3 of the} forceps channel 56. In the present embodiment, the distance φ ₂ between the protrusion 18 and the guide 20 is smaller than the diameter φ _{1 of the} forceps 60. Diameter phi ₁ of the forceps 60, the diameter of the treatment instrument passage hole 14, i.e. approximately equal to the distance between the end surface 12S and 20S. The main body plate 12 including the protrusions 18 is formed of a resin (for example, silicon material) having appropriate hardness and elasticity, and the tip of the protrusion 18 is elastically deformed as the forceps 60 are moved.

  For this reason, the forceps 60 passing through the forceps channel 56 is held with an appropriate force so as to be able to advance and retreat from the distal end surface 54 and to be rotatable by the protrusion 18 and the like. Note that the protrusion 18 is shown in FIG. 4 in a state where it is not deformed by the protrusion of the forceps 60 for convenience of explanation.

  A cutout 18N is provided in the base 18A of the protrusion 18 (see FIGS. 3 and 5). Thus, by cutting out one end of the protrusion 18 that contacts the forceps 60 passing through the treatment instrument passage hole 14, the forceps 60 can be easily advanced and retracted with a slight force while being held by the protrusion 18.

  In FIG. 5, when the endoscope hood 10 is attached to the distal end of the insertion tube 50, the position of the forceps channel 56 on the back side of the paper surface is indicated by a broken line. In the present embodiment, the contours of the treatment instrument passage hole 14 and the fluid passage hole 30 to be described later in the endoscope hood 10 attached to the insertion tube 50 are the contours of the forceps channel 56 on the back side in FIG. Almost matches.

  When dirt such as blood vessels or blood that may interfere with endoscopic observation is accumulated in the recess 22U, the air / water supply of the distal end surface 54 is operated by operating the air / water supply button 42 (see FIG. 1). Air or water is jetted from the nozzle 63 (see FIG. 2) through the third passage hole 17 (see FIG. 3) to remove dirt and the like. The jetted air, water, and filth are sucked by the forceps channel 56 through the treatment instrument passage hole 14 and the fluid passage hole 30 and are discharged out of the endoscope 40. As described above, the fluid passage hole 30 is provided in order not to reduce the suction force of the forceps channel 56 so as to reliably suck the injected air and water or dirt.

  In addition, by providing an elongated fluid passage hole 30 along the projection 18 in the vicinity of the projection 18 and on the opposite side of the treatment instrument passage hole 14 across the projection 18, the projection 18 is connected to the forceps 60. It can be adjusted so as to be elastically deformed in the radial direction of the treatment instrument passage hole 14 by the advance and retreat of the treatment tool.

  6 is an enlarged cross-sectional view showing the vicinity of the protrusion 18 in FIG. FIG. 7 is a cross-sectional view corresponding to FIG. 6, showing an enlarged vicinity of the protrusion 18 of a modification of the present embodiment.

  The main body plate 12 is provided with a groove 12G in contact with the protrusion 18 provided at the tip. With this groove 12G, the plate-like protrusion 18 can be easily deformed as the forceps 60 advance and retract. For this reason, the forceps 60 is held more strongly than necessary by the protrusions 18, and it is prevented that it is difficult to advance and retract.

  Further, the protrusion 18 of the modification is different from the present embodiment in the tip shape (see FIG. 7). That is, the protrusion 18 of the modified example has a knife edge shape with an acute inner angle α at the tip. An end surface 18S of the protrusion 18 facing the treatment instrument passage hole 14 is formed on the distal end surface 54 side when the endoscope hood 10 is attached, that is, the treatment instrument passage hole 14 on the proximal end portion 24 (see FIG. 4) side. Inclined to increase the diameter.

  Since the protrusion 18 (see FIG. 6) of the present embodiment has a large contact area with a treatment tool such as the forceps 60, it is particularly suitable when it is necessary to hold these treatment tools firmly. On the other hand, it is preferable that the modified protrusion 18 (see FIG. 7) is applied to the case where the forceps 60 having a large diameter is used or the protrusion 18 is formed of a material having high hardness.

  As described above, according to the endoscope hood 10 of the present embodiment, a treatment instrument such as the forceps 60 that advances and retreats while the thin plate-like protrusion 18 provided at the tip of the main body plate 12 is appropriately displaced. By holding, the operability of the forceps 60 and the like can be improved. Specifically, the advancement / retraction amount of the treatment tool such as the forceps 60 is not limited, and can be rotated (rotated).

Further, the forceps 60 can be regulated by the protrusion 18 and the guide 20 so as to advance and retreat along a predetermined direction, that is, a direction perpendicular to the distal end surface 54 in the present embodiment. For this reason, it is prevented that the advancing / retreating direction of the forceps 60 is shifted. However, the distance φ ₂ between the protrusion 18 and the guide 20 is adjusted so that the forceps 60 can swing to some extent, and the advancing and retreating direction of the forceps 60 can be adjusted within an appropriate range. You can also.

  Further, the protrusion 18 is provided with a notch 18N (see FIGS. 3 and 5, etc.), and the main body plate 12 is provided with a groove 12G (see FIGS. 6, 7 etc.) having an appropriate width, so that the moving treatment tool and the endoscope By adjusting the frictional force generated between the mirror hood 10 and the treatment instrument, the treatment tool can be held with an appropriate force. The treatment tool can be prevented from entering the body cavity more than necessary by the appropriate holding force of the endoscope hood 10.

  Next, a second embodiment will be described. FIG. 8 is a cross-sectional view corresponding to FIG. 4, showing the endoscope hood 10 and the insertion tube 50 in the second embodiment. FIG. 9 is an enlarged front view corresponding to FIG. 5 and showing an enlarged vicinity of the treatment instrument passage hole 14 of the endoscope hood 10 in the second embodiment.

  In the present embodiment, the end surface 20S is inclined with respect to the direction perpendicular to the front end surface 54 so that the distance from the center of the main body plate 12 increases toward the front surface 12F side. As the end surface 20S is inclined in this manner, the forceps 60 protrudes in a direction away from the center of the distal end surface 54, that is, away from the central axis 50A of the insertion tube 50.

  This is because it is easier to treat a relatively large affected part by causing a treatment tool such as the forceps 60 to protrude slightly outward from the center of the distal end surface 54. When the forceps 60 is protruded in a direction away from the center of the distal end surface 54, the distal end of the forceps 60 is included in the peripheral portion in the captured image, thereby preventing the observation of the affected area at the center of the captured image. Because. Further, in this case, the position of the distal end portion of the forceps 60 can be easily grasped. In addition, the end surface 12S of the main body plate 12 that is in the vicinity of the protrusion 18 and faces the end surface 20S is also inclined so as to be parallel to the end surface 20S. The guide portion 20 is thicker than the protruding portion 18 and has the same thickness as other regions of the main body plate 12.

  Also in this embodiment, it is possible to adjust the advancing / retreating direction of the forceps 60 to a certain extent as in the first embodiment. Therefore, FIGS. 4 and 8 in both embodiments show a state where adjustment of the advance / retreat direction (see paragraph [0034]) by the swing motion of the forceps 60 is not performed.

  Next, a third embodiment will be described. FIG. 10 is a cross-sectional view corresponding to FIGS. 4 and 8 showing the endoscope hood 10 and the insertion tube 50 according to the third embodiment. FIG. 11 is an enlarged front view corresponding to FIGS. 5 and 9, showing the vicinity of the treatment instrument passage hole 14 of the endoscope hood 10 in the third embodiment.

  In the endoscope hood 10 of this embodiment, the projections 18 and the guide portions 20 are moved so that the forceps 60 advance and retract toward the center of the distal end surface 54 of the insertion tube 50, that is, the central axis 50 </ b> A of the insertion tube 50. Arrangement and inclination angles of the end faces 12S and 20S are adjusted. Therefore, the contours of the treatment instrument passage hole 14 and the fluid passage hole 30 in the endoscope hood 10 attached to the insertion tube 50 are actually the contours of the forceps channel 56 located on the back side of the drawing in FIG. It is located above (indicated by a broken line in the drawing), that is, on the center side of the main body plate 12.

  In the present embodiment, the tip of the protruded forceps 60 is included in the vicinity of the center portion in the captured image, contrary to the second embodiment. For this reason, the endoscope hood 10 according to the present embodiment is suitable for endoscopic observation using, for example, a small forceps 60 that hardly obstructs observation of an affected area during treatment. In this embodiment as well, the advancement / retraction direction and the advance / retreat amount of the forceps 60 can be adjusted as in the previous embodiments.

  By preparing a plurality of endoscope hoods 10 having different shapes in advance as in the second and third embodiments and selectively using them, the direction in which the treatment instrument such as the forceps 60 can be easily advanced and retracted can be adjusted. This is because any endoscope hood 10 can be detachably attached to the distal end of the insertion tube 50.

  The shape or the like of the endoscope hood 10 is not limited to any embodiment. For example, the protrusion 18 may not have a plate shape as long as a treatment tool such as the forceps 60 can be held with an appropriate force. Further, when the protrusion 18 is disposed on the front surface 12F side of the main body plate 12 and the groove 12G is adjacent to the protrusion 18, the advancement / retraction direction of the treatment instrument such as the forceps 60 can be easily adjusted. The arrangement of 12G is not limited to the above-described embodiment. For example, you may provide the projection part 18 extended inward of the treatment tool passage hole 14 from the end surface 12S or the front surface 12F (refer FIG. 4 etc.). Further, not only the inclination angle of the end surface 20S (see FIGS. 4, 8, and 10) of the guide portion 20 but also the length of the protrusion 18 may be adjusted to determine the advancing / retreating direction of the treatment instrument.

  Furthermore, in order to determine the advancing / retreating direction of the forceps 60 before being changed by the user's operation, it is preferable to provide a thick guide portion 20 having an end surface 20S inclined at a predetermined angle. A thin plate-like protrusion 18 may be provided on the entire circumference of 14. In addition, the diameter or type of the treatment tool currently in use on the display unit or monitor (none of which is shown) of the processor of the electronic endoscope system, and the type of endoscope hood 10 that can be used with the treatment tool May be displayed.

It is a figure which shows the endoscope in which the hood for endoscopes of 1st Embodiment is used. It is a perspective view which shows the front end surface of the endoscope of 1st Embodiment. It is a front view which shows the hood for endoscopes of 1st Embodiment. It is sectional drawing which shows the hood for endoscope cut | disconnected along the IV-IV line | wire of FIG. 3, and the insertion tube of the state to which the hood for endoscopes was attached. It is a front view which expands and shows the vicinity of the treatment tool passage hole of the endoscope hood in the first embodiment. It is sectional drawing which expands and shows the vicinity of the projection part in FIG. It is sectional drawing which expands and shows the vicinity of the projection part of the modification of 1st Embodiment. It is sectional drawing which shows the endoscope hood and insertion tube in 2nd Embodiment. It is a front view which expands and shows the vicinity of the treatment tool passage hole of the endoscope hood in 2nd Embodiment. It is sectional drawing which shows the hood for endoscopes and an insertion tube in 3rd Embodiment. It is a front view which expands and shows the vicinity of the treatment tool passage hole of the endoscope hood in 3rd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Endoscope hood 12 Main body board 12G Groove 14 Treatment tool passage hole 18 Protrusion 18N Notch 18S End face 20 Guide part 30 Fluid passage hole 50 Insertion tube 54 Tip surface 60 Forceps (treatment tool)

Claims (9)

An endoscope hood that is detachably attached to the distal end of an insertion tube of an endoscope in which a treatment instrument advances and retreats from the distal end surface,
A passage hole through which the treatment tool passes, and a body plate that covers the distal end surface when the endoscope hood is attached to the insertion tube;
A protrusion projecting inward of the passage hole from the body plate,
An endoscope hood, wherein the treatment instrument passing through the passage hole is held by the protrusion so as to be able to advance and retreat.   The endoscope hood according to claim 1, wherein the protrusion is provided with a notch on the passage hole side.   The main body plate has a guide portion including an end surface of the main body plate on the passage hole side, and the end surface is inclined so as to project the treatment instrument passing through the passage hole in a predetermined direction. The endoscope hood according to any one of claims 2 and 3.   The endoscope hood according to any one of claims 1 to 3, wherein the projection is plate-shaped, and the guide portion is plate-shaped thicker than the projection.   The endoscope hood according to any one of claims 1 to 4, wherein the protruding portion has a plate shape thinner than the main body plate.   The main body plate has a front surface that is a surface opposite to the distal end surface when the endoscope hood is attached, and the protrusion is provided on the front surface side of the main body plate. The endoscope hood according to any one of claims 1 to 5, wherein the hood for an endoscope is provided.   The endoscope hood according to any one of claims 1 to 6, wherein the main body plate is provided with a groove in contact with the protruding portion.   8. The fluid passage hole for sucking the fluid in the space of the endoscope hood into the insertion tube is provided in the main body plate. 8. The endoscope hood as described.   The endoscope hood according to any one of claims 1 to 8, wherein the protrusion has a knife edge shape.

Images