JP2009273570A - Hood for endoscope - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hood for an endoscope capable of surely holding a body to be observed and processing and observing the body to be observed by a simple operation of a treatment instrument. <P>SOLUTION: A wire 20 includes a ring section 21 surrounding an opening and a straight linear section 22. The ring section 21 passes through the interior of an inside distal end passage 30 of a distal end region 12. When the linear section 22 is pulled, the ring section 21 moves the interior of the distal end passage 30 and is deformed to lessen its diameter. The deformation of the ring section 21 deforms the distal end region 12 to lessen the diameter of the opening to d<SB>2</SB>. In a state where the diameter of the opening is reduced, the affected portion S stored in a storage chamber 24 is held by the distal end region 12. <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 endoscopic device, it is generally possible to treat the affected part with forceps extending from the distal end surface of an insertion tube inserted into a body cavity, collect a cut affected part, and the like. . The treatment instrument including the forceps and the like is advanced and retracted from the distal end surface through the insertion tube by a user operation.

  An endoscope hood for assisting endoscopic observation or treatment of an affected area may be attached to the distal end of an insertion tube of an endoscope that can use a treatment tool. By using an endoscope hood, for example, while observing and treating 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 by sucking the affected area into the space inside the hood It can be easily excised.

As an example of such an endoscope hood, the space between the surface of the object to be observed and the distal end surface of the endoscope is deformed by reducing the pressure, and the two are brought into close contact with each other (for example, Patent Document 1). In addition, there are known ones in which the tip portion is substantially spherical and the other region is cylindrical, and the polyp is collected using a ligation tool or the like while maintaining the shape (for example, Patent Document 2).
Japanese Patent Laid-Open No. 2004-376 Japanese Patent No. 3803166

  When the space between the object to be observed and the distal end surface of the insertion tube is decompressed so that the object to be observed is brought into close contact with the distal end surface of the endoscope, the decompressed state is maintained for treatment and recovery of the object to be observed. Complicated operations are required. Furthermore, if the hood is deformed and the surface of the object to be observed is brought into close contact with the distal end surface of the insertion tube, the positional relationship between the object to be observed and the insertion tube becomes difficult to understand, and observation and treatment of the object to be observed become difficult. .

  In addition, a hood that cannot be deformed from a predetermined shape and cannot adjust the diameter of the opening at the tip or the like may not be able to hold the affected part firmly. For this reason, the operation for the treatment and recovery of the affected area becomes complicated, and it may be difficult to recover the affected area smaller than the size suitable for the recovery with only the hood.

  An object of the present invention is to realize an endoscope hood that securely holds an object to be observed and enables treatment and observation of the object by simple operation of a treatment tool.

  A first endoscope hood according to the present invention is an endoscope hood that is detachably attached to a distal end of an insertion tube of an endoscope, and accommodates an object to be observed through the opening. A flexible portion in which a chamber is formed, and a linear ring surrounding the opening and deformable. The endoscope hood is characterized in that the flexible portion holds the object to be observed by deforming the linear ring and reducing the diameter of the opening while the object to be observed is accommodated in the accommodation chamber. And

  The linear ring is preferably deformed by moving the end of the linear ring toward the insertion tube side. In this case, it is preferable that the endoscope hood further includes a linear member including a linear ring, and the linear member is moved inside the insertion tube by a user operation. The insertion tube is provided with a forceps channel for moving a treatment tool that protrudes forward and backward from the distal end surface of the insertion tube, and the linear member is preferably moved within the forceps channel.

  The linear ring is moved by, for example, a treatment tool that can protrude and retract from the distal end surface of the insertion tube. In the flexible part, it is preferable that a hood side passage through which the linear ring passes is provided. Moreover, it is preferable that the endoscope hood further includes a fixing portion that is fixed around the insertion tube. In this case, the flexible part is preferably softer than the fixed part.

  A second endoscope hood according to the present invention is an endoscope hood that is detachably attached to the distal end of an insertion tube of an endoscope, and accommodates an object to be observed through the opening. The flexible part in which the chamber was formed, and the adjustment member for adjusting the diameter of opening are provided. The endoscope hood is characterized in that the flexible portion holds the object to be observed by reducing the diameter of the opening with the adjusting member in a state where the object to be observed is accommodated in the accommodation chamber.

  According to the present invention, it is possible to realize an endoscope hood that securely holds an object to be observed and enables treatment and observation of the object to be observed by simple operation of a treatment tool.

  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 showing a state in which the endoscope hood of the first embodiment is attached to the insertion tube. FIG. 3 is a front view showing the endoscope hood of the first embodiment in a state of being attached to the insertion tube.

  The endoscope 40 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 a body cavity of a patient that is a subject to be observed. The endoscope hood 10 can be detachably attached to the distal end of the insertion tube 50 (see FIG. 2).

  The endoscope hood 10 is used to assist observation of a subject to be observed such as an affected part, treatment, or recovery of a cut affected part. As shown in FIG. 2, the endoscope hood 10 has a substantially cylindrical shape, and includes a flexible distal end region 12 (flexible portion), a proximal end region 16 (fixed portion), and a wire 20 (linear member). )including. The distal end region 12 and the proximal end region 16 are formed of an elastic member such as silicon rubber, and the wire 20 is made of metal.

  At the time of attaching the endoscope hood 10, the proximal end region 16 is fixed to the distal end portion of the insertion tube 50. Since the inner diameter of the proximal end region 16 is substantially equal to the outer diameter of the distal end portion of the insertion tube 50 and the proximal end region 16 has appropriate elasticity, the proximal end region 16 fixed around the distal end portion of the insertion tube 50 is provided. It is prevented from coming off. An opening 18 is provided at the distal end of the distal end region 12 opposite to the proximal end region 16. As will be described later, when the wire 20 is moved in the direction indicated by the arrow A, the diameter of the opening 18 is reduced, and an object to be observed such as an affected part can be held in the distal end region 12.

  Inside the insertion tube 50, an air supply tube for sending air by operating an air supply / water supply button 42 (see FIG. 1), a water supply tube for sending water (neither shown), and a forceps channel 56 (see FIGS. 2 and 3). ) The forceps channel 56 is a passage for moving a treatment tool, for example, forceps (not shown) from the distal end surface 54 so as to freely advance and retract. In the operation unit 48, a forceps port 46 is provided for allowing the user to insert the treatment tool into the forceps channel 56 (see FIG. 1).

  In addition to the end surface of the forceps channel 56, the distal end surface 54 of the insertion tube 50 is provided with an objective lens 58, an air supply port 61, and a water supply port 62 (see FIGS. 2 and 3). The treatment instrument that moves in the forceps channel 56 can freely advance and retract from the distal end surface 54. The treatment tool is used by protruding from the distal end surface 54 by a user operation when treating an object to be observed such as an affected part. The air supply port 61 and the water supply port 62 are end surfaces of an air supply tube and a water supply tube (both not shown).

  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 a light guide (not shown) and emitted from the tip surface 54 toward the object to be observed. The reflected light of the illumination light reflected by the object to be observed reaches an image sensor (not shown) via the objective lens 58, and an image signal is generated by the image sensor. 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).

  FIG. 4 is a cross-sectional view of the endoscope hood 10 cut along the line IV-IV in FIG. 3. FIG. 5 is a cross-sectional view showing the endoscope hood 10 in a state where the object to be observed is held.

  In the distal end region 12, a storage chamber 24 connected to the opening 18 is formed. The endoscope hood 10 attached to the flexible tube 50 is used as follows, and holds the affected part S that is an object to be observed. First, the affected part S is raised as necessary and accommodated in the accommodation chamber 24 via the opening 18. The affected part S is raised by, for example, a suction force or an injection of a medicine by operating the suction button 44 (see FIG. 1). However, if it is the affected part S in which the front-end | tip enters the storage chamber 24 if it is enclosed by the opening 18, the process for making it rise is unnecessary.

  The wire 20 includes a ring portion 21 (linear ring / adjusting member) surrounding the opening 18 and a linear portion 22. The wire 20 is formed, for example, by superposing one end side of a large ring-shaped wire to form a linear portion 22 and leaving the other end side as a ring to form a ring portion 21. The wire 20 can be deformed appropriately.

A distal end passage 30 (hood side passage) that surrounds the entire periphery of the opening 18 at the end portion on the distal end region 12 side is provided inside the endoscope hood 10. The ring portion 21 passes through the inside of the tip passage 30. As shown in FIG. 4, state the wire 20 no external force is applied (hereinafter, referred to as initial state) in the diameter of the opening 18 is d _1.

  In FIG. 4, for convenience of explanation, a linear portion 22 that does not originally appear in the IV-IV line cross section and a boundary portion 23 (see FIG. 3) that is a boundary between the ring portion 21 and the ring portion 21 are also shown. The objective lens 58 is omitted.

  The linear portion 22 passes through the forceps channel 56 and the forceps opening 46 (see FIG. 1), and an end portion (not shown) of the linear portion 22, that is, an end opposite to the boundary portion 23 is an insertion tube. 50 outside. When the wire 20 is pulled in the direction indicated by the arrow A by the user holding the end (not shown) near the forceps opening 46 (see FIG. 4), the end of the ring portion 21 in the storage chamber 24, that is, the boundary The part 23 is moved toward the insertion tube 50 side. At this time, the ring portion 21 to which the external force by the user's operation is transmitted is deformed so that the diameter thereof is reduced while moving inside the distal end passage 30.

When the ring portion 21 is deformed in this manner, the distal end region 12 is also deformed so that the diameter of the opening 18 is d ₂ smaller than d ₁ . In a state where the diameter of the opening 18 is reduced (hereinafter referred to as a holding state), the affected part S further enters the storage chamber 24 and the stored affected part S is held by the distal end region 12.

  The distal end region 12 is formed of a member that is softer than the proximal end region 16 so as to be appropriately deformable. The diameter and the like of the tip passage 30 are adjusted so that an appropriate frictional force is generated between the tip region 12 and the ring portion 21 in the holding state. For this reason, once the endoscope hood 10 is in the holding state, the holding state is maintained for a while even if the user then releases the hand from the linear portion 22 and the wire 20 is released from the external force. Note that these members may be integrally formed of the same material so that the distal end region 12 is thinner than the proximal end region 16.

  As described above, according to the present embodiment, the affected part S in the storage chamber 24 is held near the opening 18 at the distal end of the endoscope hood 10 by a simple operation of pulling the end of the wire 20. Can do. For this reason, treatment such as cutting with the treatment tool of the held affected part is easy, and the cut affected part S can be reliably held in the storage chamber 24 of the distal end region 12. Furthermore, since the affected part S can be held in a state separated from the distal end surface 54 of the insertion tube 50 by an appropriate distance, endoscopic observation of the held affected part S is easy.

  Further, once the endoscope hood 10 is held, the held state is maintained for a while without further operation. Therefore, the user can concentrate on treatment such as observation and cutting of the affected part S. Thus, the endoscope hood 10 enables treatment such as collection of an object to be observed or observation by simple operation of the treatment tool.

Furthermore, since the endoscope hood 10 is detachable, for example, an endoscope hood whose diameter d _{1 of the} opening 18 is not the same size as the inner diameter φ ₁ of the proximal end region 16 can be used. In the present embodiment, the inner diameter φ ₁ of the proximal end region 16 is substantially the same as or slightly smaller than the outer diameter φ ₂ of the insertion tube 50. When the inner diameter φ ₁ of the proximal end region 16 is smaller than the outer diameter φ ₂ of the insertion tube 50, the endoscope hood 10 is fixed around the insertion tube 60 by the elastic force of the proximal end region 16. Therefore, even if the diameter d _{1 of the} opening 18 is not the same as the inner diameter φ ₁ of the proximal region 16, the opening 18 can be attached to the distal end portion of the endoscope 40.

  Next, a second embodiment will be described. FIG. 6 is a cross-sectional view corresponding to FIG. 4 of the endoscope hood 10 in the second embodiment. FIG. 7 is a cross-sectional view corresponding to FIG. 5, showing the endoscope hood 10 of the second embodiment in a state where an object to be observed is held.

This embodiment differs from the first embodiment in the method of fixing the end of the wire 20. First, the end portion of the linear portion 22 is clamped by the treatment instrument 60 inserted through the forceps channel 56. Then, as indicated by an arrow A, the boundary portion 23 is moved toward the distal end surface 54 of the insertion tube 50 via the linear portion 22. In this way, by pulling the boundary portion 23 that is the end portion of the ring portion 21 toward the inside of the insertion tube 50, the ring portion 21 is deformed in the same manner as in the first embodiment. Then, in a holding state in which the diameter of the opening 18 is reduced from d ₁ to d ₂ (see FIG. 7) Remove the treatment instrument 60, also the wire 20 is released from the external force, as described above, the holding state continues for some time To do. In the meantime, the surgeon can project another treatment tool 60 from the forceps channel 56 and perform treatment such as cutting of the affected part S.

  In the present embodiment, a plurality of forceps channels 56 may be used. In this case, in the initial state, one end of the linear portion 22 is sandwiched by one treatment instrument 60, and the boundary portion 23 is inserted into the distal end of the insertion tube 50 via the linear portion 22 as indicated by an arrow A (see FIG. 6). Move toward face 54.

In this way, the boundary portion 23 that is the end of the ring portion 21 is moved to the insertion tube 50 side and further into the insertion tube 50 as necessary, so that the ring portion 21 is the same as in the first embodiment. Deform. Then, in the holding state in which the diameter of the opening 18 is reduced from d ₁ to d ₂ (see FIG. 7), another treatment tool 60 that can be advanced and retracted from the distal end surface 54 is projected to perform treatment such as cutting of the affected part S .

  In the present embodiment, the linear portion 22 is provided with a small ring 25 at the end opposite to the boundary portion 23. By gripping the small ring 25 with the treatment instrument 60, the operation of moving and deforming the ring portion 21 via the linear portion 22 is easily and reliably performed.

  As described above, according to the endoscope hood 10 of the present embodiment, it is possible to hold the affected part S in the accommodation chamber 24 and treat the affected part S by using only the treatment tool 60. Operation for treatment such as cutting of the affected part S becomes easier. Further, since the affected area S is treated only inside the accommodation chamber 24, normal body tissues other than the affected area S can be surely compared with the case where the affected area S is cut from the outside of the accommodation chamber 24 using a treatment tool such as a snare. Can be protected.

  The shape, material, and the like of the endoscope hood 10 are not limited to any embodiment. For example, the shape of the tip region 12 (see FIG. 2 and the like) in the initial state may be a tapered shape. In this case, the operation of surrounding the affected part S with the opening 18 becomes easy. Further, the distal end region 12 and the proximal end region 16 may be formed of a biocompatible soft material (for example, a soft resin material such as urethane rubber), and only the harder proximal end region 16 is made of urethane rubber. These members may be formed of different materials. The wire 20 does not need to be made of metal as long as the ring portion 21 can be appropriately deformed, and may be formed of a thread having excellent strength.

  In addition, instead of the endoscope 40, an overtube with a forceps channel may be inserted into the second forceps channel 56 shown in FIGS. In this case, the affected part S is treated with a treatment tool such as a high-frequency knife for excising the boundary surface between the opening surface around the opening 18 of the endoscope hood 10 and the affected part S.

It is a figure which shows the endoscope in which the hood for endoscopes in 1st Embodiment is used. It is a perspective view showing the state where the endoscope hood of a 1st embodiment is attached to an insertion tube. It is a front view which shows the hood for endoscopes of 1st Embodiment of the state attached to the insertion tube. It is sectional drawing of the hood for endoscopes cut | disconnected along the IV-IV line | wire of FIG. It is sectional drawing which shows the hood for endoscopes of the state holding the to-be-observed body. It is sectional drawing of the hood for endoscopes in 2nd Embodiment. It is sectional drawing which shows the hood for endoscopes of 2nd Embodiment of the state holding the to-be-observed body.

Explanation of symbols

10 Endoscope Hood 12 Tip Area (Flexible Part)
16 Base region (fixed part)
18 Opening 20 Wire (Linear member)
21 Ring (Linear ring / Adjustment member)
24 Accommodating room 30 Tip passage (hood side passage)
50 Insertion tube 54 Tip surface 56 Forceps channel 60 Treatment tool

Claims (9)

An endoscope hood that is detachably attached to the distal end of an insertion tube of an endoscope,
A flexible part in which an opening and a storage chamber for storing an object to be observed are formed through the opening;
A linear ring surrounding the opening and deformable;
The flexible portion holds the object to be observed by deforming the linear ring and reducing the diameter of the opening while the object to be observed is accommodated in the accommodation chamber. Endoscope hood.   The hood for an endoscope according to claim 1, wherein the linear ring is deformed by moving an end portion of the linear ring toward the insertion tube.   The endoscope hood according to claim 2, further comprising a linear member including the linear ring, wherein the linear member is moved inside the insertion tube by a user operation.   The insertion tube is provided with a forceps channel for moving a treatment tool that protrudes forward and backward from a distal end surface of the insertion tube, and the linear member is moved in the forceps channel. The endoscope hood according to claim 3.   The endoscope hood according to claim 2, wherein the linear ring is moved by a treatment tool that can be moved forward and backward from the distal end surface of the insertion tube.   The endoscope hood according to claim 2, wherein a hood side passage through which the linear ring passes is provided in the flexible portion.   The endoscope hood according to claim 1, further comprising a fixing portion fixed around the insertion tube.   The endoscope hood according to claim 7, wherein the flexible part is softer than the fixed part. An endoscope hood that is detachably attached to the distal end of an insertion tube of an endoscope,
A flexible part in which an opening and a storage chamber for storing an object to be observed are formed through the opening;
An adjustment member for adjusting the diameter of the opening,
The endoscope is characterized in that the flexible portion holds the object to be observed by reducing the diameter of the opening by the adjusting member in a state where the object to be observed is accommodated in the accommodation chamber. hood.

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