JP2020018524A - Attachment hood for endoscope - Google Patents

Abstract

To provide an attachment hood for an endoscope capable of removing foreign matters having entered into a human body by allowing them to pass through an annular organ without damaging it.SOLUTION: The attachment hood comprises: an attachment body provided so as to be interlocked with a guide body movable in an internal space of an organ; and a covering body which is connected to the attachment body and elastically deformable according to the form of the internal space of the organ, the covering body having a slit which is formed at least at one location and can change an interval with the deformation.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an endoscope attachment hood that can be detachably attached to an endoscope.

  Heretofore, an endoscope hood device has been known as an attachment attached to an endoscope. This hood device for an endoscope ensures a visual field of observation and prevents the hood from being damaged by external force. For such a purpose, the hood device of the endoscope has been constituted by a soft and elastic member such as silicone rubber (for example, see Patent Document 1).

JP 2005-052359 A

  The endoscope hood device described above is for preventing the hood itself from being damaged when an external force is applied, and can be elastically deformed, but is sufficiently deformed depending on the shape and size of the organ. It was not possible, but had an approximately constant size (spread) and shape.

  In addition, when a foreign substance such as a fish bone, a medicine package, a denture, or a dental treatment instrument is swallowed by mistake, an operation of removing the foreign substance using an endoscope is performed. In such a removal operation, it is necessary to prevent the gastrointestinal tract from being damaged or perforated by a sharp portion of the foreign substance. In order to prevent such damage to organs, it is conceivable that foreign matter is removed while the foreign matter is covered using the above-mentioned hood of the endoscope, but the purpose is completely different, so it is sufficient. May not work.

  The present invention has been made in view of the above points, and an object of the present invention is to provide an endoscope attachment capable of removing a foreign substance that has entered the body by passing the foreign body without damaging the annular organ. To provide food.

The features of the attachment hood for a guide according to the present invention include:
An attachment body provided so as to be interlocked with a guide body that can move in the internal space of the organ,
A covering connected to the mounting body and elastically deformable in accordance with the form of the internal space of the organ, the covering having a slit formed at at least one location and having a variable interval with deformation. is there.

  The slits increase the degree of freedom of deformation of the covering, and cover the foreign body with the covering while deforming the covering according to the form of the internal space of the organ, thereby entering the body without damaging the organ by the foreign matter. Foreign matter can be taken out.

It is a perspective view showing the whole of the endoscope attachment hood 10 from the approach direction P side according to the first embodiment. It is a front view showing the whole of the endoscope attachment hood 10 from the approach direction P side according to the first embodiment. It is a perspective view showing the whole of the attachment hood for endoscopes 10 from a discharge direction Q side by a 1st embodiment. FIG. 2A is a cross-sectional view of the endoscope attachment hood 10 according to the first embodiment, taken along line AA (FIG. 2), and FIG. FIG. 4 is an enlarged cross-sectional view of the connection section 300 for illustrating movement of the connection section 300. It is a perspective view showing the inclined state of attachment hood 10 for endoscopes by a 1st embodiment. It is a perspective view showing the state where attachment hood 10 for endoscopes by a 1st embodiment was attached to tip part FE of endoscope ES. It is a front view showing the state where attachment hood 10 for endoscopes by a 1st embodiment was attached to tip part FE of endoscope ES. It is a front view showing the state of attachment hood 10 for endoscopes, when moving endoscope ES in the approach direction P of an annular organ. It is a front view showing the state of the endoscope attachment hood 10 when the endoscope ES is moved in the discharge direction Q of the annular organ. FIG. 9 is a front view showing a change in the state of the endoscope attachment hood 10 when the endoscope ES is moved in the approach direction P of the annular organ. It is a front view showing a change of a state of attachment hood 10 for endoscopes, when moving endoscope ES in discharge direction Q of an annular organ. It is a front view showing the whole of endoscope attachment hood 20 from the approach direction P side by a 2nd embodiment. It is a front view showing flap part 200-2 of attachment hood 30 for endoscopes constituted only by single flap 210 and one slit 240.

<<<<< first embodiment >>>>

<< First Embodiment >>
According to the first embodiment,
An attachment (for example, an attachment portion 100 to be described later) provided in conjunction with a guide (for example, an endoscope ES to be described later) that is movable in an internal space of the organ (for example, a reduced-diameter annular organ NO to be described later). etc,
A cover (for example, a flap portion 200 and the like) elastically deformable in accordance with the shape of the internal space of the organ (for example, a reduced-diameter annular organ NO and a physiological constriction PN to be described later) connected to the attachment body. In addition, there is provided an attachment hood for a guide, comprising: a cover formed at at least one location and having a slit (for example, a slit 240 described later) whose interval can be changed with deformation.

  The attachment hood for a guide includes an attachment and a cover. The attachment body is provided so as to be interlocked with the guide body. The guide can move in the internal space of the organ. With this configuration, the mounting body can move with the movement of the guide body. For example, when the guide moves in a first direction (for example, an approach direction P described later) in the internal space of the organ, the mounting body also moves in the first direction in the internal space of the organ, and the guide moves inside the organ. When it moves in the second direction in the space (for example, a discharge direction Q described later), the mount also moves in the second direction in the internal space of the organ.

  The covering can be elastically deformed according to the form of the internal space of the organ. Here, the form of the internal space of the organ refers to the size and shape of the internal space of the organ. Further, when the internal space of the organ is temporally deformed, the covering can also be deformed according to the temporal change.

  The covering has a slit formed at least at one position. That is, the slit is formed in at least one portion of the covering. The spacing of the slits can change with deformation. By providing the slit whose interval can be changed along with the deformation, the degree of freedom of the deformation of the covering can be increased, and the organ can be more easily deformed according to the form of the internal space.

  The cover may be configured to be detachably connected to the mounting body. In this way, maintenance work such as replacement and repair can be facilitated.

  By sufficiently deforming the covering according to the form of the internal space of the organ, the foreign matter can be covered by the covering, so that the foreign matter that has entered the body can be taken out without damaging the organ with the foreign matter.

<< Second Embodiment >>
The second embodiment is the first embodiment,
When the covering is deformed, two ends (for example, extended sides 280a and 280b to be described later) of the covering facing each other with the slit interposed therebetween can be in contact with each other (for example, an adjacent flap 210 to be described later). A part of the flap 210 is configured as an overlapping portion OV).

  The covering has two edges facing each other across the slit. When the covering is deformed, the two edges can come into contact. Note that it is sufficient that the two ends touch each other, and it is not always necessary to overlap. By allowing the two edges to come into contact with each other, the covering members can mutually support each other by the contact, the deformation state of the covering member can be stabilized, and the state of covering the foreign matter can be maintained. .

<< Third Embodiment >>
The third embodiment is the same as the second embodiment,
The coating is in the form of a thin film,
The cover deforms in accordance with the form of the internal space of the organ, thereby covering the foreign material in the internal space of the organ with the cover (for example, FIGS. 11 and 12 described later).

  Since the covering is in the form of a thin film, the covering can be sufficiently deformed according to the form of the internal space of the organ, and the influence of the covering on the organ can be reduced. In addition, since the foreign body in the internal space of the organ can be moved in the internal space of the organ while being kept covered with the coating, the foreign substance does not become exposed from the coating in the process of movement, and the foreign substance is removed from the organ. Since there is no contact or sliding, the foreign matter does not damage the organ.

<< Fourth Embodiment >>
A fourth embodiment is the third embodiment,
The covering body extends in a direction away from the mounting body around the mounting body (for example, FIGS. 1, 2, and 3 described below), and has a contour (for example, a virtual line CC described later). Has an outer peripheral portion (for example, an outermost peripheral portion 270 described later),
The slit is formed from the contour toward the attachment body (for example, FIGS. 1, 2, and 3 described below).

  Since the covering body extends in a direction away from the mounting body around the mounting body, the covering body can be covered so as to entirely cover the foreign matter, and the foreign body can be hardly exposed from the covering body. In addition, since the slit is formed from the contour toward the mounting body, the independence of the movement of the covering body sandwiching the slit can be increased, the covering body can be more easily deformed, and the foreign matter can be accurately detected. Can be covered.

<< Fifth Embodiment >>
The fifth embodiment is a modification of the fourth embodiment,
The attachment body is detachably attachable to the guide body.

  Maintenance such as replacement and repair can be facilitated.

<< Sixth Embodiment >>
The sixth embodiment is a modification of the fifth embodiment,
The coating body has a plurality of thin film-shaped coating wings (for example, five flaps 210 described below),
The adjacent coating blades are provided with a slit (for example, a slit 240 described later) interposed therebetween.

  Since the coating wings adjacent to the coating wings are provided with the slits interposed therebetween, each of the coating wings can be deformed independently of each other, and can be appropriately formed according to the form of the internal space of the organ. The coating can be deformed, and foreign substances can be made hard to be exposed from the coating.

<< Seventh Embodiment >>
A seventh embodiment is the sixth embodiment,
The plurality of covering wings are deformed according to the form of the internal space of the organ when moving in the internal space of the organ (for example, FIGS. 10 and 12 described below).
At least a part of the adjacent covering blades comes into contact with each other (for example, a part OV where the flap 210 overlaps with a part of the adjacent flap 210 described later).

  At least a part of the adjacent covering blades comes into contact with each other. Note that it is sufficient that the two ends touch each other, and it is not always necessary to overlap. Since at least a part of the adjacent coating wings is in contact with each other, the adjacent coating wings can be supported by the contact with each other, and the state when the coating wing is deformed can be stabilized. Can be maintained.

<< Eighth Embodiment >>
An eighth embodiment is a modification of the seventh embodiment,
The plurality of covering wings are inclined and deformed in the direction opposite to the moving direction according to the form of the internal space of the organ.

  Since the plurality of covering wings are inclined and deformed in the direction opposite to the moving direction, the resistance generated between the plurality of covering wings and the organ can be reduced, and the effect of contact with the organ is reduced. Thus, foreign matter can be moved without damaging the organ.

<< Ninth Embodiment >>
According to the ninth embodiment,
An attachment body provided so as to be interlocked with a guide body that can move in the internal space of the organ,
An elastically deformable covering connected to the mounting body, having at least one portion having a different rigidity (for example, a replenisher 290 described later) and being deformable according to the form of the internal space of the organ; An attachment hood for a guide including a cover and (for example, FIG. 13 described below) is provided.

  Rather than slits, parts with different stiffness are provided, and while properly preventing exposure of foreign matter from the slits, parts with different stiffness can be accurately deformed according to the form of the internal space of the organ .

<< 10th Embodiment >>
According to the tenth embodiment,
An attachment (for example, an attachment portion 100 to be described later) provided in conjunction with a guide (for example, an endoscope ES to be described later) that is movable in an internal space of the organ (for example, a reduced-diameter annular organ NO to be described later). etc,
A cover (e.g., a flap portion 200 described below) that is connected to the attachment body and that can be elastically deformed in accordance with the shape of the internal space of the organ (e.g., a reduced-diameter annular organ NO or a physiological constriction PN described below). ,
The covering body extends in a direction away from the mounting body around the mounting body,
The cover has an outer peripheral portion (for example, an outermost peripheral portion 270 described later) that defines an outline of the cover (for example, a virtual line CC described later),
The covering body has a slit formed at at least one portion of the covering body (for example, a slit 240 described later) from the contour toward the attachment body (for example, FIGS. 1, 2, and 3 described below). ),
The covering body is deformable while being inclined in a direction opposite to a moving direction of the internal space of the organ,
There is provided an attachment hood for a guide, in which an interval formed by the spread of the slit changes based on a deformation of the covering.

  Since the covering body is inclined and deformed in the direction opposite to the moving direction, the resistance generated between the covering body and the organ can be reduced, and the effect of contact with the organ is reduced, and the organ is reduced. Foreign matter can be moved without causing damage.

<<<< Details of the first embodiment >>>>
Hereinafter, embodiments will be described with reference to the drawings.

<<<< Overview of Endoscope Attachment Hood 10 >>>>
The attachment hood 10 for an endoscope according to the first embodiment is detachably attached to an endoscope ES (see FIGS. 7 and 8) as described later, and removes a foreign substance FB that has entered the body into the endoscope ES. This is a component for accurately performing the work of taking out the foreign matter FB when taking out.

<< Endoscope ES >>
In this specification, an endoscope ES is a device that is inserted into a body and allows the internal state of the organ to be visually recognized by capturing an image of the organ from the inside. In this specification, the endoscope ES has a long continuous shape, but may have an independent shape such as a capsule type if the endoscope attachment hood 10 can be attached. Further, the endoscope ES also has a function of holding the foreign matter FB by the forceps FT, in addition to capturing the inside.

  As shown in FIGS. 7 and 8, which will be described later, an illumination opening LO, an imaging opening IO, and a forceps opening FO are formed at the distal end FE of the endoscope ES. The illumination opening LO is an opening for emitting illumination light for illuminating an organ. The imaging aperture IO is an aperture for capturing an image of an organ with an image sensor (CCD, CMOS, or the like). The forceps opening FO is an opening for taking in and out the forceps FT for grasping the foreign matter FB that has entered the organ.

  The endoscope ES is not limited to such a configuration, and may have a function of attaching the endoscope attachment hood 10 and a function of holding the foreign matter FB.

<< organs >>
In this specification, it refers to an organ into which the endoscope ES can enter. Specifically, it is an internal organ officer having a tubular structure, and is also called a luminal organ. In the first embodiment, as an organ, a thin annular organ NO (such as an esophagus or a large intestine) (hereinafter referred to as a reduced annular organ NO) and an annular organ EO having a diameter larger than that of the reduced annular organ NO are used. (For example, a stomach) (referred to as an enlarged annular organ EO). Further, a physiological constriction PN (eg, an esophagogastric junction or an esophageal entrance) is formed at the boundary between the reduced diameter annular organ NO and the enlarged diameter annular organ EO. In this specification, a case will be described in which a foreign object FB that has entered the enlarged annular organ EO (for example, the stomach) is taken out.

<< direction >>
In this specification, for the purpose of explanation, the direction inside the organ is defined as follows.

<Entering direction, inside direction>
This is the direction in which the body moves toward the inside of the body (the body), and the direction in which the body moves toward the foreign matter FB that has entered the body (see arrows P in FIGS. 9, 10, 11, and 12).

<Discharge direction, outward direction>
This is a direction in which the body moves outward (outside the body), and is a direction in which the foreign matter FB is taken out of the body to the outside of the body (see arrows Q in FIGS. 9, 10, 11, and 12).

<Axial direction>
The above-described approach direction, inside direction, discharge direction, and outside direction may be collectively referred to as an axial direction. That is, the axial direction is a direction along the longitudinal direction of the endoscope ES to which the endoscope attachment hood 10 is attached (the direction of the central axis (not shown) of the endoscope ES) (FIG. 9, FIG. (See arrows P and Q in FIGS. 10, 11 and 12).

<Radial direction>
It is a direction perpendicular to the axial direction, and is a direction along the radius of the endoscope ES to which the endoscope attachment hood 10 is attached (the direction away from or approaching the center axis of the endoscope ES) ( (See arrow R in FIG. 7).

<Circumferential direction>
The circumferential direction is a direction around a cylinder or a cylinder. The endoscope ES has a substantially columnar shape, and as described later, the attachment portion 100 of the endoscope attachment hood 10 has a substantially cylindrical shape. On a plane perpendicular to the center line (central axis) (see OC in FIG. 2) of the substantially cylindrical shape or the substantially cylindrical shape, a substantially circular shape which is the contour of the endoscope ES or the mounting portion 100. Can be formed. The circumferential direction is a direction along the circumference of the substantially circular shape of the contour of the endoscope ES or the mounting portion 100 (see arrow C in FIG. 7).

<<< Configuration of Attachment Hood 10 for Endoscope >>>
<<<< materials >>
The endoscope attachment hood 10 (see FIGS. 1 to 3) is integrally formed and is formed of the same material as a whole. As a material of the attachment hood 10 for an endoscope, there are silicone, fluorocarbon resin, and the like. The whole is made of a flexible and elastically deformable material. The material of the endoscope attachment hood 10 may be any material that does not easily affect the living body and is flexible and elastically deformable.

  Note that the endoscope attachment hood 10 may be formed separately. With this configuration, maintenance work such as replacement and repair can be facilitated.

  As shown in FIGS. 1 to 3 and the like, the attachment hood 10 for an endoscope has a mounting portion 100, a flap portion 200 (wing portion), and a connection portion 300. As described above, they are integrally formed of silicone.

<< Mounting part 100 >>
The mounting part 100 has a substantially cylindrical shape. The endoscope attachment hood 10 is elastically deformable as a whole, and the mounting portion 100 is elastically deformable mainly in the radial direction and is expandable and contractable. The attachment portion 100 is a portion for attaching the endoscope attachment hood 10 to the outer peripheral surface of the endoscope ES.

  With the diameter of the mounting portion 100 slightly widened, the mounting portion 100 is fitted into the endoscope ES, and the mounting portion 100 is brought into close contact with the endoscope ES by the contraction force of the mounting portion 100, so that the endoscope attachment is attached. The hood 10 can be attached to a fixed position of the endoscope ES (see FIG. 7 described later).

<Cylinder inner peripheral surface 102 and cylindrical outer peripheral surface 104>
The mounting portion 100 has a cylindrical inner peripheral surface 102 on the inner peripheral side of the cylinder and a cylindrical outer peripheral surface 104 on the outer peripheral side of the cylinder. As described above, the mounting portion 100 is mainly elastically deformable in the radial direction, and the mounting portion 100 is fitted in the endoscope ES in a state where the mounting portion 100 is expanded in the diametrical direction and the diameter thereof is expanded. . When the attachment part 100 is attached to the outer peripheral surface of the endoscope ES, the diameter becomes slightly larger than the natural state, and the contraction force generated in the attachment part 100 brings the state of close contact with the outer peripheral surface of the endoscope ES. Mounted. Due to the close contact between the cylindrical inner peripheral surface 102 and the outer peripheral surface of the endoscope ES, the endoscope attachment hood 10 can be held at a fixed position of the endoscope ES.

  Further, in order to facilitate attachment / detachment to / from the endoscope ES, to stabilize the attachment state, and to adjust the adhesiveness, a partially reduced diameter portion, an enlarged diameter portion, and an uneven portion (not shown) are used. May be provided. The cylindrical outer peripheral surface 104 is provided with a connecting portion 300 described later and a flap portion 200 via the connecting portion 300.

<First cylindrical part 110 and second cylindrical part 120>
The mounting part 100 has a first cylindrical part 110 and a second cylindrical part 120 along the longitudinal direction. Each of the first cylindrical portion 110 and the second cylindrical portion 120 has a substantially cylindrical shape, and the central axes of the first cylindrical portion 110 and the second cylindrical portion 120 are on the same straight line (on a straight line). Is formed so as to be located at The first cylindrical portion 110 and the second cylindrical portion 120 define the entire mounting portion 100. Each of the first cylindrical portion 110 and the second cylindrical portion 120 has the cylindrical inner peripheral surface 102 and the cylindrical outer peripheral surface 104 described above.

<Connection part 300>
A connection part 300 is provided between the first cylindrical part 110 and the second cylindrical part 120. That is, the first cylindrical portion 110 and the second cylindrical portion 120 are formed in a direction away from each other with the connecting portion 300 interposed therebetween. The first cylindrical portion 110 is arranged in the approach direction P, and the second cylindrical portion 120 is arranged in the discharge direction Q. The specific configuration of the connection unit 300 will be described later.

<First end 112 and second end 122>
First cylindrical portion 110 has a first end 112 and second cylindrical portion 120 has a second end 122. The first end 112 is positioned toward the approach direction P (inward direction). The second end 122 is positioned in the discharge direction Q (outward direction).

  When the endoscope attachment hood 10 is attached to the endoscope ES, the first end 112 is positioned at a position protruding from the distal end FE of the endoscope ES (see FIG. 7), and the second end 112 is positioned at the second end. Of the endoscope ES is located inside the distal end FE of the endoscope ES (see FIG. 7). By positioning the first cylindrical portion 110 and attaching the endoscope attachment hood 10 to the endoscope ES in this manner, the distal end portion FE of the endoscope ES can be protected. Even when an impact is applied to the distal end FE when the endoscope ES is outside the body, the distal end FE can be prevented from being damaged and protected.

<< Flap part 200 >>
As shown in FIGS. 1 to 3 and the like, the flap section 200 has a plurality of, for example, five flaps 210. The five flaps 210 are formed at the same angular interval along the circumferential direction of the connection part 300. Specifically, the five flaps 210 are provided at the same angular interval along the circumferential direction at the first end 310 (described later) of the connection part 300 (see FIG. 4). In the first embodiment, the five flaps 210 have the same shape and size. Each of the flaps 210 has a shape of a thin film or a thin plate (a flat plate), a substantially petal shape or a substantially wing shape (in particular, a substantially rotary wing shape). Specifically, the flap 210 has a shape of a thin film or a thin plate (a flat plate), and has a substantially trapezoidal shape, a substantially triangular shape, or a part of a substantially fan-shaped (fan-shaped ring) shape.

  The flap 210 has two extending sides 280a and 280b extending in a direction away from the connecting part 300, and an outermost peripheral part 270 sandwiched between the two extending sides 280a and 280b. The two extending sides 280a and 280b are formed along the radius of the flap portion 200, and are separated from each other as the distance from the connecting portion 300 increases.

  The corner formed by the extension side 280a and the outermost periphery 270 and the corner formed by the extension side 280b and the outermost periphery 270 have a rounded shape (a shape with a radius). Having. In this manner, by making the corners rounded, it is possible to prevent the flap 210 from damaging the organ when the corners of the flap 210 come into contact with the organ. In addition, the rounded shape makes it difficult for the corners of the flap 210 to be locked by the wall surface of the organ, so that the endoscope attachment hood 10 can be moved smoothly. Each of the flaps 210 is formed so as to be spaced apart from the connection part 300 in the radial direction. A slit 240 is formed between adjacent flaps 210.

  As shown in FIG. 1 to FIG. 3, in the natural state, all of the five flaps 210 are in a state where they are spread in a plane in the radial direction without being deformed. The flaps 210 can be elastically deformed, and the five flaps 210 can be individually elastically deformed around the connecting portion 300 and swing.

  The flap 210 is in the form of a thin film or a thin plate (a flat plate), and has a first surface 220 and a second surface 230. The first surface 220 and the second surface 230 are surfaces directed in a direction away from each other. When the first surface 220 is in a natural state without deformation, it goes in the approach direction P, and when the second surface 230 is in a natural state without deformation, it goes in the discharge direction Q. As described above, the first surface 220 and the second surface 230 are surfaces that face in directions away from each other (the approach direction P and the discharge direction Q) (FIGS. 1, 2, 3, 4, and 6). , FIG. 7, FIG. 11, FIG. 12, etc.).

  The outline of the flap portion 200 is circular (circumferential) and includes the outermost peripheral portions 270 of the five flaps 210, as shown by the imaginary line CC in FIGS. That is, a curve that is smoothly formed including the outermost peripheral portion 270 of the five flaps 210 is the contour of the flap portion 200. 2 and 8, the imaginary line CC is slightly separated from the outermost peripheral portion 270 in order to clearly show the outline.

<Slit 240>
As described above, the slit 240 is formed between the adjacent flaps 210. In the flap portion 200 according to the first embodiment, slits 240 are formed at five places. The five slits 240 have the same size and shape. The slit 240 has a substantially fan-shaped shape, and is formed close to the connection part 300. The slit 240 has one extension side 280a of the adjacent flaps 210, the other extension side 280b of the adjacent flaps 210, and a connection part 242 that connects the extension side 280a and the extension side 280b. And As described above, the extension side 280a and the extension side 280b are formed along the radius of the flap 200, and the width of the slit 240 (the length between the extension side 280a and the extension side 280b). Becomes longer as the distance from the connection part 300 increases. The connecting portion 242 has a curved shape.

  By forming the slit 240, the adjacent flaps 210 can be easily deformed independently by making it difficult to interfere with each other, and can be deformed according to the shape and size of the physiological stenosis PN and the reduced annular organ NO. can do. Further, by forming the connecting portion 242 into a curved shape, even when a force in a direction separating from each other is applied to the adjacent flaps 210, the force can be dispersed, and the occurrence of breakage from the connecting portion can be reduced. Can be prevented.

  The radial length SL and the interval SW (see FIG. 2) of the slit 240 can be determined as appropriate. In the example shown in FIG. 2, the interval SW is the width of the slit 240 (the interval between two adjacent flaps 210) at a position SL / 2 that is half the radial length SL of the flap portion 200 in the natural state. is there.

  The length SL in the radial direction of the slit 240 is longer than half of the length TL (see FIG. 2) from the root of the flap 210 (the first end 310 of the connection portion 300) to the outermost periphery (SL> TL). / 2) is preferred. In this way, the independence of the operation of each of the five flaps 210 is increased, and the flaps 210 can be easily bent separately, and the five flaps 210 can accurately cover the foreign matter FB. Become.

  Further, the interval SW between the slits 240 is longer than one fifth of the radial length SL of the flap 210 and shorter than one third of the interval TW of the flap 210 (TW). / 3> SW> SL / 5). The interval TW is the width of the flap 210 at a position SL / 2, which is half the length SL in the radial direction (see FIG. 2). By doing so, it is possible to prevent the adjacent flaps 210 from interfering with each other in a state where the flaps 210 are opened to some extent, and the handling of the flap portion 200 can be simplified. In a state where the flaps 210 are closed to some extent, the adjacent flaps 210 can come into contact with or overlap with each other, and the closed state can be easily maintained. Further, when the flaps 210 are closed to some extent, the adjacent flaps 210 can overlap each other, and the five flaps 210 can accurately cover the foreign matter FB.

<Emboss 250>
A plurality of embosses 250 are provided on both the first surface 220 and the second surface 230 of the flap 210. The emboss 250 is a projection that protrudes from the surfaces of the first surface 220 and the second surface 230. By forming the emboss 250 on the flap 210, the emboss 250 can be preferentially brought into contact with the wall surface of the reduced annular organ NO such as the esophagus and the large intestine. By making the emboss 250 contact the wall surface of the organ preferentially, the contact area with the wall surface of the organ can be reduced, and when the endoscope attachment hood 10 is passed through the reduced diameter annular organ NO. In addition, the frictional force due to contact can be reduced, and damage to organs can be prevented. By reducing the influence of the contact on the organ, the endoscope attachment hood 10 can be smoothly and accurately moved by the reduced-diameter annular organ NO.

  The outer shape (surface shape) of the emboss 250 is formed by a predetermined curved surface (curved surface). For example, the shape of the emboss 250 may be a paraboloid (a rotation paraboloid, an ellipse paraboloid, an ellipse paraboloid, a hyperbolic paraboloid), an ellipsoid, an ellipsoidal cone, or a shape similar thereto And so on. By making the surface shape of the emboss 250 a smooth curved surface, it is possible to disperse the stress (pressure) on the organ generated when the emboss 250 comes into contact with the wall surface of the organ, and it is difficult to damage the organ by the contact of the emboss 250 can do.

  The number (density), position, shape, size, and the like of the embosses 250 can be appropriately determined according to the material, thickness and hardness of the flap 210, the type of organ that passes through the endoscope attachment hood 10, and the like. What is necessary is just to determine so that the stress (pressure) to the organ can be dispersed and the contact area with the wall surface of the organ can be reduced.

<Grooves 260a and 260b>
On the first surface 220 of the flap 210, two grooves 260a and 260b are formed. The grooves 260a and 260b are formed along the circumferential direction, and have an arc shape centered (concentric) on the connection portion 300 (the central axis CO of the attachment portion 100). The radii of the grooves 260a and 260b are different from each other, and the radius of the groove 260a is larger than the radius of the groove 260b.

  By forming the grooves 260a and 260b, the flap 210 can be easily bent or bent toward the side where the grooves 260a and 260b are formed. When passing the endoscope attachment hood 10 with the reduced diameter annular organ NO, the flap 210 may be bent or bent depending on the size (diameter of the esophagus, diameter of the large intestine, etc.) of the reduced diameter annular organ NO. The width of the endoscope attachment hood 10 can be adjusted according to the size of the reduced-diameter annular organ NO.

  The width of the grooves 260a and 260b is about the thickness of the flap 210, and the depth of the grooves 260a and 260b is smaller than the thickness of the flap 210. The width and depth of the grooves 260a and 260b can be appropriately determined according to the desired ease of bending and bending.

  The example in which the grooves 260a and 260b are formed only on the first surface 220 of the flap 210 has been described. However, even if the grooves are formed only on the second surface 230 of the flap 210, the first surface 220 and the second surface may be formed. Grooves may be formed on both sides of 230. Further, the number of grooves 260a and 260b is not limited to two, and may be one or three or more. By making the flap 210 easily bendable or bendable, the endoscope attachment hood 10 can be moved by the reduced annular organ NO while maintaining the state in which the foreign matter FB is covered with the flap 210. .

<< connection part 300 >>
As shown in FIGS. 1, 2, 3, and 4, the connection portion 300 is provided at a substantially central portion in the longitudinal direction of the attachment portion 100. The connection part 300 has a first end 310, a second end 320, and a curved part 330. The first end portion 310 is connected to the outer peripheral surface of the mounting portion 100 over the entire circumference along the circumferential direction of the mounting portion 100. The first end portion 310 can be displaced (displaced) by the deformation of the curved portion 330 (see the dashed arrow M in FIGS. 5A and 5B). The flap 200 is connected to the second end 320. As described above, the connection portion 300 connects the attachment portion 100 to the flap portion 200. That is, the attachment portion 100 and the flap portion 200 are connected via the connection portion 300. As will be described later, the state in which the flap 210 is inclined can be changed by the deformation of the bending portion 330.

  The bending portion 330 is provided so as to go around the mounting portion 100. The curved portion 330 has a shape of a part of a substantially annular surface (annular surface, torus). The toric surface is a rotating surface obtained by rotating the circumference (hereinafter, referred to as a small circle) in a three-dimensional space around an axis that does not intersect with the small circle, and is a so-called donut-shaped surface. Part. For this reason, the annular surface is formed by a circle formed by the radius of the small circle (small radius) and the center of the small circle when the small circle is rotated around an axis that does not intersect with the small circle (hereinafter, a great circle). ) (Large radius). As described above, the curved portion 330 has a shape of a part of the annular surface. Specifically, the curved portion 330 has a shape obtained by rotating an arc of approximately 90 degrees of a small circle for defining an annular surface once around an axis that does not intersect the arc.

  As described above, the curved portion 330 has a shape of a part of the annular surface, that is, a curved shape, and has the first surface 312 and the second surface 314 as shown in FIG. . FIG. 5 is an enlarged view of a region surrounded by a broken line in FIG.

  The first surface 312 is a surface facing the discharge direction Q, and the second surface 314 is a surface facing the approach direction P. In the natural state, the first surface 312 is a convexly curved surface, and the second surface 314 is a concavely curved surface, as shown in FIGS. I have. Further, the curved portion 330 can also be elastically deformed. As shown in FIGS. 6 and 5B, when a force in the discharge direction Q is applied to the five flaps 210, the unevenness of the curved portion 330 is reversed, and the first surface 312 becomes a concave surface, The second surface 314 becomes a convex surface, and the five flaps 210 are inclined in the discharge direction Q.

  The state in which the unevenness of the curved portion 330 is inverted can be stably held, and the five flaps 210 can be maintained in an inclined state inclined in the discharge direction Q. As described above, the bending portion 330 functions as a lock mechanism (a holding mechanism, a maintenance mechanism). As described later, the overall spread of the five flaps 210 can be reduced by tilting the five flaps 210. For this reason, when the endoscope attachment hood 10 enters the reduced diameter annular organ NO, it is possible to reduce a resistance force such as a frictional force generated between the flap 210 and the reduced diameter annular organ NO. The mirror attachment hood 10 can be smoothly moved with the reduced diameter annular organ NO.

  In the above-described example, the case where the curved portion 330 has a shape of a part of the annular surface has been described. However, the shape of the curved portion 330 is not limited to this shape, and the five flaps 210 are not inclined. Any shape may be used as long as it can selectively transition (transition) between two states, a state and an inclined state inclined in the discharge direction Q. That is, when the bending portion 330 is in a natural state, the entire second end 320 is in the approach direction P, and when the bending portion 330 is in an inclined state, the entire second end 320 is May be any shape as long as it can move in the discharge direction Q.

<<< Operation of Attachment Hood 10 for Endoscope >>>
Hereinafter, the operation of the endoscope attachment hood 10 in the process of removing the foreign matter FB will be described with reference to FIGS. 9, 10, 11, and 12. 9 and 10, the endoscope ES and the foreign matter FB are omitted for clarity. Also, FIGS. 11 and 12 schematically show the operation of the endoscope attachment hood 10 in order to clarify the operation. Further, in the following description, it is assumed that the foreign matter FB exists in the enlarged annular organ EO (for example, the stomach).

<<<< Endoscope attachment hood 10 is attached to endoscope ES >>
First, as described above, the endoscope attachment hood 10 is attached to the endoscope ES by fitting the attachment portion 100 of the endoscope attachment hood 10 near the distal end portion FE of the endoscope ES. Can be. When the endoscope attachment hood 10 is attached to the endoscope ES, it is still outside the body, and the five flaps 210 are separated from the attachment portion 100 without deformation, as shown in FIG. (Radial direction), and extends along a plane (natural state).

<< Operation at insertion / entering >>
When the attachment hood 10 for an endoscope is made to enter the reduced-diameter annular organ NO in order to remove the foreign matter FB in the body, before the entry, the five flaps 210 are first inclined in the discharge direction Q. (See FIG. 6). By making the inclined state, the overall spread of the five flaps 210 is reduced, and when the five flaps 210 enter the reduced-diameter annular organ NO, the resistance such as frictional force generated between the flap 210 and the reduced-diameter annular organ NO is reduced. The force can be reduced, and the endoscope attachment hood 10 can be smoothly moved by the reduced diameter annular organ NO.

  Next, when the endoscope attachment hood 10 enters the reduced-diameter annular organ NO, as shown in FIGS. 9 and 11A, the five flaps 210 are pressed by the wall surface of the organ and deformed. Further inclining toward the discharge direction Q, the spread of the five flaps 210 is in a state of being compressed (hereinafter, referred to as a compressed state) according to the size (diameter) of the reduced diameter annular organ NO. . As described above, the five flaps 210 are compressed by the wall surface of the reduced diameter annular organ NO, so that the compressed state is maintained. As shown in FIG. 11B, the operator of the endoscope ES gradually moves the endoscope ES in the approach direction P with the reduced diameter annular organ NO. Note that the spread of the five flaps 210 in the compressed state in which the endoscope attachment hood 10 has entered the reduced-diameter annular organ NO is smaller than the spread in the inclined state (FIG. 6).

<< Grip operation of foreign matter FB >>
While moving the endoscope ES, the operator of the endoscope ES visually checks an image captured by a camera provided at the distal end FE of the endoscope ES to confirm the presence or absence of the foreign matter FB. As shown in FIGS. 11C and 11D, the distal end portion FE of the endoscope ES passes through a physiological constriction PN (such as an esophagogastric junction or an esophageal entrance) and expands the annular organ. When entering the EO, the five flaps 210 are released from being pressed by the wall surface of the reduced-diameter annular organ NO, and assume a natural state in which the flaps 210 have spread in the radial direction. When the size of the enlarged annular organ EO is smaller than the natural state of the five flaps 210, the five flaps 210 are compressed by the wall surface of the enlarged annular organ EO. When the operator of the endoscope ES finds the foreign matter FB, as shown in FIG. 12A, the operator extends the forceps FT from the distal end portion FE of the endoscope ES to visually check the position of the foreign matter FB. The foreign object FB is gripped by the forceps FT.

<< Operation at discharge >>
As shown in FIG. 12B, the operator of the endoscope ES moves the endoscope ES in the discharge direction Q while maintaining the state where the foreign matter FB is grasped by the forceps FT. When the distal end FE of the endoscope ES again approaches the physiological constriction PN (such as the esophagogastric junction or the esophageal entrance) due to the movement in the ejection direction Q, the five flaps 210 become Engage with stenosis PN. Further, as shown in FIG. 12C, with the movement of the endoscope ES in the ejection direction Q, the five flaps 210 are pressed by the physiological constriction PN, and move toward the entry direction P. Slowly tilt.

  When the entire five flaps 210 enter the reduced diameter annular organ NO, the five flaps 210 are compressed by the wall surfaces of the reduced diameter annular organ NO, as shown in FIGS. 10 and 12D. , A compression state inclined toward the approach direction P is obtained. When the five flaps 210 are pressed and compressed by the wall surface of the reduced diameter annular organ NO, the entire foreign matter FB becomes a state covered (enclosed) by the five flaps 210, and The foreign matter FB is not exposed. As long as the endoscope attachment hood 10 exists in the reduced diameter annular organ NO, the state in which the foreign matter FB is covered by the five flaps 210 is maintained. Therefore, the foreign matter FB does not come into contact with or slide on the wall surface of the reduced diameter annular organ NO, and it is possible to prevent the foreign matter FB from damaging the reduced diameter annular organ NO.

  As shown in FIG. 10, when the endoscope ES is moved in the discharge direction Q with the reduced diameter annular organ NO, a part OV where the flaps 210 overlap with each other is formed by a part of the adjacent flaps 210. By forming the overlapping portions OV, it is possible to make it difficult for the adjacent flaps 210 to be separated from each other, and to make it difficult to form a gap between the adjacent flaps 210. By doing so, it is difficult to expose the foreign matter FB from between the adjacent flaps 210, and it is possible to accurately prevent the foreign matter FB from coming into contact with the wall surface of the reduced-diameter annular organ NO.

  As described above, when the endoscope ES is moved in the discharge direction Q with the reduced diameter annular organ NO, a part OV where the flaps 210 overlap with each other is formed by a part of the adjacent flaps 210. However, even if the flap 210 is deflected by the wall surface of the reduced diameter annular organ NO, depending on the size of the reduced diameter annular organ NO and the size and shape of the slit 240, the root of the flap 210 (the first portion of the connection portion 300). (In the vicinity of the end portion 310), the adjacent flaps 210 cannot sufficiently overlap, and a gap (slit 240) may remain. Hereinafter, this gap is referred to as a remaining gap. Therefore, the length in the longitudinal direction of the first cylindrical portion 110 of the mounting portion 100 is set to be equal to or longer than the length of the remaining gap. With this configuration, the held foreign matter FB cannot approach the remaining gap due to the presence of the first cylindrical portion 110, and the foreign matter FB can be prevented from being exposed from the remaining gap.

  As described above, in the reduced-diameter annular organ NO, the foreign matter FB can be accurately discharged out of the body by maintaining the state in which the entire foreign matter FB is covered with the five flaps 210.

<<<< Overview of Operation of Flap Unit 200 >>>>
As described above, the five flaps 210 of the flap section 200 are compressed and elastically deformed by the wall surface of the reduced-diameter annular organ NO and tilt in the discharge direction Q or the approach direction P. Also, when the compression by the wall surface of the reduced diameter annular organ NO is released, it returns to the natural state by recovery (return) by elastic deformation. As described above, the five flaps 210 are not driven by the driving unit such as the actuator, and are only pressed by the physiological constriction part PN or compressed by the wall surface of the reduced-diameter annular organ NO. The flaps 210 are swung and deformed. As described above, the flap unit 200 can control the shapes of the five flaps 210 not passively (actively) but passively (passively).

<<<< Operation of Endoscope Attachment Hood 10 >>>>
When removing the foreign matter FB that has entered the body using the endoscope ES, the state in which the foreign matter FB is entirely covered by the flap portion 200 can be maintained, and the reduced-diameter annular organ NO and the like can be moved. In addition, the foreign matter FB can be safely removed without damaging the organ by the foreign matter FB.

  By closing the flap 200, the foreign matter FB can be covered by the flap 200 of the endoscope attachment hood 10, and by opening the flap 200, the foreign matter FB can be released. The open / closed state of the flap 200 is determined by the state of contact with the reduced-diameter annular organ NO or the like.

<<<<< second embodiment >>>>
FIG. 13 is a front view showing the whole of the endoscope attachment hood 20 according to the second embodiment from the approach direction P side. In FIG. 13, the same components as those in the first embodiment are denoted by the same reference numerals.

  In the above-described first embodiment, an example in which the slit 240 exists between the adjacent flaps 210 has been described, but a configuration in which the slit 240 is not provided may be adopted. For example, a replenisher 290 may be provided instead of the slit 240 as in a flap portion 200-1 shown in FIG. Since the difference from the first embodiment is only the replenisher 290, the description of the attachment portion 100, the flap portion 200-1, and the connection portion 300 is omitted.

<<< supplement body 290 >>
The replenisher 290 is in the form of a thin film or a thin plate (a flat plate), is formed continuously with the adjacent flap 210, and there is no gap between the flap 210 and the replenisher 290. That is, the flap portion 200-1 is continuously formed as a whole. Further, the refill 290 has a stiffness that is less than the stiffness of the flap 210. For this reason, the replenisher 290 is more easily bent and deformed than the flap 210. For example, even when the flap 210 and the replenisher 290 are formed of materials having different rigidities, the replenisher 290 may be formed of the same material and formed to be thinner than the flap 210. Regardless of the configuration, the replenisher 290 may be formed to be more flexible than the flap 210.

  In addition, although the embossing 250 is not provided in the replenishing body 290 shown in FIG. 13, the embossing 250 may be provided in the replenishing body 290. The emboss 250 may be provided on both sides of the replenisher 290 or only on one side. It suffices if the replenisher 290 can be easily bent regardless of the presence or absence of the emboss 250.

  With such a configuration, it is possible to deform according to the shape and size of the physiological constriction part PN and the reduced diameter annular organ NO, etc., and it is possible to accurately prevent the foreign matter FB from being exposed. Further, the foreign matter FB can be taken out of the body without damaging the organ by the foreign matter FB.

<<<< Other forms >>>>
<< Other modes 1 >>
In the above-described example, the case where five flaps 210 and five slits 240 are provided is shown. However, the flap portion 200 is not constituted by a plurality of flaps 210 but is constituted by a single flap 210. (See FIG. 14). In this case, only one slit 240 is formed. By doing so, it is possible to prevent the cutting from gradually starting from the slit 240 due to a change in diameter or the like, and to improve the durability. In the flap portion 200-2 of the endoscope attachment hood 30 shown in FIG. 14, the emboss 250 is omitted. Any material can be used as long as the foreign matter FB is covered by the flap portion 200-2, and the foreign matter FB can be moved out of the body by covering the foreign matter FB.

<< Other modes 2 >>
In the above-described example, the example in which the mounting portion 100 includes the first cylindrical portion 110 and the second cylindrical portion 120 has been described. However, the mounting portion 100 may be configured with only one of them. The attachment section 100 only needs to be able to detachably attach the endoscope attachment hood 10 to the endoscope ES. By appropriately determining the length of the first cylindrical portion 110 or the second cylindrical portion 120, the endoscope attachment hood 10 can be accurately attached to the endoscope ES.

<< Other modes 3 >>
In the example described above, the slit 240 has a gap (a gap is formed) such as the interval SW when the flap 200 is in a natural state in which the flap 200 is not deformed. In a natural state where the flap 200 is not deformed, the flap 200 may be in a state of contact (contact) without a gap, and a gap may be generated according to the deformation of the flap portion 200. Even in this case, when the flap portion 200 is deformed, a gap between the slits 240 is generated, so that the degree of freedom of the deformation of the flap portion 200 can be increased.

<< Other modes 4 >>
In the above-described example, the example in which the flap unit 200 operates separately from the forceps FT has been described. However, the flap unit 200 and the forceps FT may be linked. For example, a link mechanism or the like may be provided so that the five flaps 210 are opened when the forceps FT are opened, and the five flaps 210 are also closed when the forceps FT is closed.

<< Other modes 5 >>
Further, as described above, an example in which the shape of the five flaps 210 is passively (passively) controlled has been described. However, an actuator such as a small motor for driving the flap unit 200 is provided, and the flap unit is provided. The opening / closing operation of 200 may be controlled in an auxiliary manner. The open / close state of the five flaps 210 can be stably controlled without depending on the size or shape of the reduced diameter annular organ NO or the like.

<< Other modes 6 >>
The flap portion 200 of the endoscope attachment hood 10 described above has an example in which the flap portion 200 has a substantially circular contour so as to be evenly spaced toward the periphery around the mounting portion 100, but has an elliptical shape or an elliptical shape. For example, the shape may be unevenly spread. The shape of the flap portion 200 can be appropriately determined depending on the shape and size of the reduced diameter annular organ NO and the enlarged diameter annular organ EO, etc., and the type, size and shape of the foreign matter FB.

<< Other modes 7 >>
In addition, although the above-described five flaps 210 have the same size and shape and are formed at the same angular interval, the shapes and sizes of the flaps 210 include different ones. May be. Further, they may be arranged so as to have different angular intervals. The size, shape, and arrangement of the flap 210 can be appropriately determined according to the shape and size of the reduced-diameter annular organ NO and the enlarged-diameter annular organ EO, and the type, size, and shape of the foreign matter FB.

<< Other modes 8 >>
Further, the case where the above-described grooves 260a and 260b are formed over the entire flap 210 is shown, but may be formed only on a part of the flap 210. The cross-sectional shapes, widths, depths, and the like of the grooves 260a and 260b can also be appropriately determined according to the shape and size of the reduced-diameter annular organ NO and the enlarged annular organ EO, and the type, size, and shape of the foreign matter FB. it can.

<< Other modes 9 >>
The above-described flap portions 200, 200-1, and 200-2 are all elastically deformed to bend or bend. For example, the flap 210 has been curved or bent. However, the flap 210 may expand and contract by elastic deformation. In particular, the flap 210 may be configured to extend by elastic deformation to cover the foreign matter FB.

<< Other modes 10 >>
Each of the above-described flap portions 200, 200-1, and 200-2 has a single case, but a plurality of flap portions 200, 200-1, and 200-2 may be provided. For example, the first flap 200 and the second flap 200 are arranged concentrically, and the flap 210 of the first flap 200 is arranged so as to overlap the slit 240 of the second flap 200. By doing so, even when the foreign matter FB is exposed from the slit 240 of the second flap part 200, the foreign matter FB can be covered by the flap 210 of the first flap part 200, and it is accurately determined that the organ is damaged by the foreign matter FB. Can be prevented. When a plurality of flap portions are used, it is not necessary that all the flap portions have the same size and shape, and flap portions having different sizes and shapes can be appropriately combined.

<<<<< Other >>>>>
As described above, the present invention has been described with reference to the first embodiment, the second embodiment, and the like. However, it is understood that the description and drawings which form part of this disclosure limit the present invention. Should not be. As described above, the present invention naturally includes various embodiments and the like not described herein.

Reference numerals 10, 20, 30 Attachment hood for endoscope 100 Mounting portion 102 Inner peripheral surface of cylinder 104 Outer peripheral surface of cylinder 110 First cylindrical portion 112 First end portion 120 Second cylindrical portion 122 Second end portion 200, 200-1 , 200-2 flap portion 210 flap 220 first surface 230 second surface 240 slit 250 emboss 270 outermost peripheral portions 280a and 280b extension side 290 replenisher 300 connection portion 310 curved portion 312 first surface 314 second Surface 320 first end 330 second end ES endoscope FE distal end FB foreign matter NO reduced annular organ EO enlarged annular organ PN physiological stenosis OV Flap 210 overlapping part

Claims (8)

An attachment body provided so as to be interlocked with a guide body that can move in the internal space of the organ,
A cover connected to the mounting body and elastically deformable in accordance with the form of the internal space of the organ, the cover having a slit formed at at least one location and capable of changing an interval with deformation. Attachment hood.   The attachment hood for a guide according to claim 1, wherein when the cover is deformed, two ends of the cover facing each other with the slit interposed therebetween can contact. The coating is in the form of a thin film,
The attachment hood for a guide according to claim 2, wherein the cover deforms according to the form of the internal space of the organ, thereby covering the foreign matter in the internal space of the organ with the cover. The covering body extends in a direction away from the mounting body around the mounting body, and has an outer peripheral portion that defines a contour,
The attachment hood for a guide according to claim 3, wherein the slit is formed from the contour toward the mounting body. The coating has a plurality of thin film-shaped coating wings,
The attachment hood for a guide according to claim 4, wherein the adjacent covering blades are provided with the slit interposed therebetween. The plurality of covering wings are deformed according to the form of the internal space of the organ when moving in the internal space of the organ,
The attachment hood for a guide according to claim 5, wherein at least a part of the adjacent covering blades is in contact.   The attachment hood for a guide according to claim 6, wherein the plurality of covering wings are inclined and deformed in a direction opposite to a moving direction according to a form of an internal space of the organ. An attachment body provided so as to be interlocked with a guide body that can move in the internal space of the organ,
A cover attached to the attachment body, the cover being elastically deformable, having at least one portion having different stiffness, and being deformable according to the form of the internal space of the organ. hood.

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