JP2012135542A - Exclusion body for operation under endoscope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow the easy entrance of an exclusion body to a trocar, and to prevent a sponge body from being scraped off by the opening edge of the trocar.SOLUTION: This exclusion body for an operation under an endoscope held by a forceps and brought into a body cavity of a patient through the trocar includes the sponge body 1 and woven gauze 6. The sponge body is covered with the woven gauze so that the sponge body does not come in contact with the trocar but the woven gauze does when the sponge body enters and passes the trocar T. A position in front of the sponge body in time of the trocar passage is provided with a portion of the woven gauze without the sponge body, and the portion is set as a holding part 10 held by the forceps.

Description

  The present invention relates to a technique of an exclusion body that moves an organ in order to secure a surgical field in an endoscopic operation.

  In endoscopic surgery, a capillary trocar is inserted into a patient's body cavity. The medical sponge body to be inserted into the body cavity is gripped at the end in the longitudinal direction by the grip portion at the tip of the forceps. The grasping part of the forceps is inserted into the trocar and pushed, and the sponge body is pulled into the trocar. The sponge body is pulled by the grasping portion of the forceps, advances through the trocar, and exits into the body cavity. This sponge body is an elastic body, and its cross section is larger than the trocar passage section. When the sponge body enters the trocar, the cross-section is reduced and it progresses through the trocar in a rod shape. When exiting the trocar, the cross section expands and restores its original shape.

  The sponge body in the body cavity is used as an exclusion body that retreats an organ that interferes with the operation. It is also used as a liquid-absorbing liquid that absorbs liquid in the body cavity. The used sponge body in the body cavity is grasped at the longitudinal end by the grasping portion of the forceps penetrating the trocar. The forceps gripping part is pulled into the trocar, and the sponge body is pulled into the trocar. The sponge body is pulled by the grasping portion of the forceps, advances through the trocar, and goes out of the body cavity.

  This type of commercially available sponge body is formed into an oval thick plate, penetrates a hole at one end, passes double a string with an X-ray contrast thread through the hole, and joins both ends of the string. The sponge body with a string has a double looped string as a grip. The grip portion is gripped by the grip portion of the forceps.

Catalog of Hogi Medical Co., Ltd.'s “Sekurea (registered trademark)”

1. Task
1.1 The medical sponge body to be inserted into the patient's body cavity is made of foamed synthetic resin such as polyurethane foam, and when gripped with metal forceps and pulled strongly, the gripped part may be broken. Sponge bodies that are easy to tear are difficult to pull into the trocar.
In the sponge body with a string, when a grip part consisting of two strings is gripped with forceps, if there is a string left unhandled, the string may be caught on a trocar or an organ. It takes time and effort to hold the two strings of the grip together.

1.2 When a foamed synthetic resin sponge body enters a trocar, it may be rubbed at the opening edge of the trocar and the ridges and the like may be scraped off. It is not preferred that the sponge powder or debris remain in the patient's body cavity.

1.3 When the elastic sponge body is pulled into the trocar by pulling one end side with the tip of the forceps, the cross section rapidly shrinks. At that time, a large force is required for pulling with forceps. It is not easy to pull the sponge body into the trocar.

2. Idea
2.1 Compared to sponge body, woven gauze is hard to tear and is hard to wear. Therefore, we decided to cover the sponge body with woven gauze. Specifically, the fabric gauze is in contact with the trocar when passing through the trocar, and the sponge body is not in contact with the trocar. For example, a woven gauze is formed into a bag, and a sponge body is enclosed in the woven gauze bag. Also, woven gauze is wrapped around the sponge body.
Then, when the sponge body covered with the fabric gauze enters the trocar, the outer fabric gauze is rubbed against the opening edge of the trocar. The woven gauze is difficult to be scraped off at the opening edge of the trocar. The sponge body inside the fabric gauze does not contact the opening edge of the trocar. It is not scraped off at the opening edge of the trocar.

2.2 When covering the sponge body with the woven gauze, it was decided to provide the woven gauze part without the sponge body at the position that would be the front side of the sponge body when passing through the trocar. This part is a gripping part to be gripped with forceps.
Then, when the sponge body covered with the fabric gauze is put into the trocar, the grip portion of the fabric gauze on the front side is grasped with forceps and pulled. The sponge body cannot be grasped with forceps. Not broken. Woven gauze is difficult to break.
In addition, when the sponge body covered with the fabric gauze is put into the trocar, if the front gripping part is grasped and pulled, the gripping part side of the fabric gauze covering the sponge body enters the trocar. The axial direction extends, and the perpendicular direction, the trocar radial direction shrinks. The thickness is reduced. By the reduction of the grip part side of the fabric gauze, the radial direction of the trocar shrinks on the grip part side of the sponge body. The thickness is reduced. The gripping part side of the sponge body is thinned so that it easily enters the trocar.

2.3 With fabric gauze, the amount of stretch in the direction of pulling and the amount of reduction in the direction perpendicular to the direction of warp or weft are greater than when pulling in the direction oblique to the warp or weft. When the pulling direction is at an angle of 45 degrees with the warp or weft, the amount of extension in the pulling direction and the amount of reduction in the direction perpendicular thereto are maximized.
Therefore, in the fabric gauze covering the sponge body, the warp or weft directions are arranged obliquely with the front-rear direction of the sponge body and the approach direction to the trocar. Preferably, it is arranged at an angle of about 45 degrees.
Then, when the sponge body covered with the fabric gauze enters the trocar, the reduction amount of the thickness on the side of the grip portion increases. Increases the amount of resistance reduction when entering a trocar.

2.4 X-ray contrast threads are not easy to attach to the sponge body.
Therefore, the fabric gauze covering the sponge body was decided to have an X-ray contrast yarn. Alternatively, the X-ray contrast yarn is covered with a woven gauze together with the sponge body.
Then, the X-ray contrast yarn can be easily attached.

1. In the retraction body for endoscopic surgery that is grasped with forceps and brought into the patient's body cavity through the trocar,
Having sponge body and woven gauze,
The sponge body is covered with a fabric gauze, and when entering and passing through the trocar, the fabric gauze contacts the trocar and the sponge body does not contact the trocar.
An extruding body characterized in that a fabric gauze part without a sponge body is provided at a position on the front side of the sponge body when passing through the trocar, and this part is used as a gripping part grasped with forceps.
2. In the above-described endoscopic surgical retraction body,
The woven gauze is formed into a bag, and a sponge body is sealed in the woven gauze bag.
3. In the above-mentioned extruding body for endoscopic surgery of 1,
The woven gauze is characterized by being wound around a sponge body.
4). In the above-described endoscopic surgical retraction body,
The woven gauze is characterized in that the direction of warp or weft is arranged obliquely with respect to the trocar entry direction of the sponge body.
5. In the above-described endoscopic surgical retraction body,
Sponge body is plate-shaped, made into two pieces,
The two sponge bodies are arranged in the front and back, facing each other, spaced apart, and covering both sponge bodies in this arrayed state with woven gauze,
It is characterized in that the part between the two sponge bodies can be folded into two so that the two sponge bodies can be overlapped to form a block shape.
6). In the above extruding body for endoscopic surgery of 1-4,
The sponge body is made into an elongated plate, and the center part can be folded in half so that it can be folded in half. It is characterized by having a configuration in which a restoring force is applied.
7). In the above-described endoscopic surgical retraction body,
Each of the front end and the rear end is provided with a portion of a woven gauze without a sponge body, and these portions are formed as grip portions to be gripped with forceps, respectively.
8). In the above-described endoscopic surgical retraction body,
The woven gauze is characterized by having an X-ray contrast yarn.
9. In the above-described endoscopic surgical retraction body,
The X-ray contrast yarn is characterized by being covered with a woven gauze together with a sponge body.

  Exclusion bodies tend to enter trocars. The sponge body is not scraped off at the opening edge of the trocar.

The front view of the exclusion body for endoscopic surgery in the 1st example of embodiment of this invention. FIG. 2 is an enlarged sectional view taken along line AA in FIG. 1. FIG. 3 is an enlarged cross-sectional view taken along line BB in FIG. 1. The perspective view of the sponge body of the same pressure exclusion body. The front view of the textile gauze of the same exclusion body. The front view of the bag of the textile gauze. The front view of the state which draws in the same pressure exclusion body in a trocar. The front view of the exclusion body for endoscopic surgery in the 2nd example of embodiment. The front view of the textile gauze of the same exclusion body. The top view of the state which folded the same pressure exclusion body into two. The front view of the exclusion body for endoscopic surgery in the 3rd example of embodiment. The perspective view of the sponge body of the same pressure exclusion body. The top view of the state which folded the same pressure exclusion body into two. The front view of the exclusion body for endoscopic surgery in the 4th example of embodiment. The front view of the state which piled up the sponge body of the same pressure exclusion body on the textile gauze. The front view of the state which wound textile gauze around the sponge body. The front view of the exclusion body for endoscopic surgery in the 5th example of embodiment. The perspective view of the sponge body of the same pressure exclusion body. The front view of the state which developed the textile gauze of the same pressure exclusion body. The front view of the state which folded the textile gauze into two. The front view of the bag of the textile gauze. The front view of the exclusion body for endoscopic surgery in the 6th example of embodiment. The perspective view of the state which folded the same pressure exclusion body into two.

[First example (see FIGS. 1 to 7)]
As shown in FIGS. 1 to 3, the retraction body for endoscopic surgery of this example has a sponge body 1 sealed in a woven gauze bag 5.
As shown in FIG. 4, the sponge body 1 has a rectangular plate shape in which the front-rear direction (left-right direction in the figure) is longer than the up-down direction, and the upper and lower corners of the front end 2 are cut off obliquely and chamfered. The cross section perpendicular to the longitudinal direction of the longitudinal direction is larger than the passage cross section of the trocar T. The sponge body 1 is manufactured by cutting a flat plate of polyurethane foam for medical use.

The bag 5 is made of two woven gauze 6 of the same shape and the same size, and the edges are sewn together with a thread.
As shown in FIG. 5, the fabric gauze 6 has a rectangular shape in which the front-rear direction (left-right direction in the figure) is longer than the vertical direction, and the front end 7 protrudes forward in a dogleg shape or a triangular shape. The shape is slightly larger than the sponge body 1. A cotton fabric gauze with a medical X-ray contrast yarn 8 is cut and manufactured. The X-ray contrast yarn 8 is woven into the gauze as one warp. The warp and weft yarns of the gauze are arranged in a direction that is oblique to the front-rear direction of the fabric gauze 6 and about 45 degrees.

The fabric gauze 6 with the X-ray contrast yarn 8 is overlapped, and the front edge of the dogleg shape and the straight upper and lower edges are sewn with the yarn 9 as shown in FIG. Make a bag. The bag is open at the trailing edge. The sewn bag is turned upside down and the inside and outside are reversed, and the front edge portion, the upper edge portion, and the lower edge portion that are sewn together with the thread 9 are arranged inside. In this bag 5, the sponge body 1 is inserted from the front end 2 through the opening at the rear edge, and the opening at the rear edge is sewn with a thread 9 and closed. The sponge body 1 and the bag 5 are aligned in the front-rear direction.
A portion 10 of the fabric gauze 6 without the sponge body is provided at the front end of the bag 5 of the fabric gauze 6 and the front side of the sponge body 1, and this triangular portion is used as the grip portion 10. The grip 10 is gripped with forceps.

When the exclusion body of this example is inserted into the body cavity of the patient, the grip 10 at the front end is gripped by the grip at the tip of the forceps. The forceps gripping part is inserted into the opening at the outer end of the trocar T inserted into the body cavity of the patient, and the gripping part 10 is pulled into the opening. Then, as shown in FIG. 7, the triangular grip portion 10 side of the woven gauze 6 is in contact with the opening edge of the outer end of the trocar T, and the longitudinal direction of entering the trocar T and the axial direction of the trocar T extend, The radial direction of the trocar T shrinks in the right-angle direction. The thickness is reduced. By this reduction, the radial direction of the trocar T shrinks on the grip 10 side of the sponge body 1 which is an elastic body. The thickness is reduced to a tapered shape. The grip portion 10 side of the sponge body 1 is thinned so that it can easily enter the trocar T.
Next, the grasping portion of the forceps pushes the inside of the trocar T, pulls the retraction body, and pulls it into the trocar T. The retraction body is pulled by the grasping portion of the forceps, is squeezed into a rod shape, proceeds through the trocar T, and exits from the opening at the inner end of the trocar T into the body cavity. When the evacuation body exits from the trocar T, the transverse section is enlarged by the elastic force of the sponge body 1 and restored to its original shape.
The excretion body in the body cavity is used as an organ excretion body and also as a fluid absorption liquid.

When the used retraction body in the body cavity is taken out of the body cavity, the grasping portion 10 of the retraction body is grasped by the grasping portion of the forceps penetrating the trocar T. The forceps gripping part is pulled into the trocar T, and the retraction body is pulled into the trocar T. The retraction body is pulled by the grasping part of the forceps and proceeds in a rod shape in the trocar T, and comes out of the body cavity from the opening at the outer end of the trocar T. When the used retraction body enters the opening at the inner end of the trocar T, the grip portion 10 side contacts the opening edge at the inner end of the trocar T in the same manner as when entering the opening at the outer end of the trocar T. The direction to enter is increased and the thickness is reduced. It becomes easy to enter the trocar T.
In the exclusion body of the present example, the sponge body 1 is covered with a fabric gauze 6. When passing through the trocar T, the fabric gauze 6 contacts the trocar T, and the sponge body 1 does not contact the trocar T.

[Second Example (see FIGS. 8 to 10)]
The retraction body for the endoscopic operation of this example has two sponge bodies 1 in the first example arranged side by side so that the central portion between both sponge bodies 1 can be bent. Moreover, the grip part 10 is provided in the front end and the rear end, respectively.
As shown in FIG. 8, the sponge body 1 similar to that in the first example has two sheets arranged in the front-and-rear direction, and the ends without chamfering on the opposite side to the front end 2 face each other and are spaced apart. Both sponge bodies 1 are sealed in a woven gauze bag 11 in this arrangement.

The bag 11 is made of two pieces of fabric gauze 12 having the same shape and the same size and stitched together with a thread.
As shown in FIG. 9, the fabric gauze 12 is formed in an elongated rectangular shape in the front-rear direction (left-right direction in the figure), and the front and rear ends 13 protrude in a dogleg shape and a triangular shape, respectively. As in the first example, the fabric gauze 12 is a cotton fabric gauze with a medical X-ray contrast yarn 8, and the warp and weft directions of the gauze are inclined at 45 degrees with respect to the longitudinal direction of the fabric gauze 12. Is arranged.
In the same manner as in the first example, the fabric gauze 12 with the X-ray contrast yarn 8 forms two bags 11, puts two sponge bodies 1 in the bag 11, and closes the opening of the bag 11.

The exclusion body of this example makes the center part between both sponge bodies 1 the folding part 14 of the textile gauze 12 without a sponge body, and can be folded in two. When folded in half, as shown in FIG. 10, the two sponge bodies 1 overlap to form a block shape. It becomes a block-shaped exclusion body. If it is not folded in half, it is an elongated plate-like extrudate.
Further, the exclusion body is provided with a portion 10 of the fabric gauze 12 having no sponge body at the front end and the rear end, and the triangular portion 10 is used as a grip portion 10. The trocar T can be inserted from either the front or rear end. One of the grip portions 10 is gripped by the grip portion of the forceps and pulled into the opening of the trocar T. The behavior at that time is the same as in the first example.
In the exclusion body of this example, two sponge bodies 1 are covered with a woven gauze 12. When passing through the trocar T, the fabric gauze 12 contacts the trocar T, and the sponge body 1 does not contact the trocar T.
Other points are the same as in the first example.

[Third example (see FIGS. 11 to 13)]
The retraction body for endoscopic surgery of this example makes one sponge body 15 into an elongated plate shape that connects two sponge bodies 1 in the second example, and the center portion can be bent.
As shown in FIGS. 11 and 12, the sponge body 15 has a rectangular plate shape elongated in the front-rear direction (left-right direction in the figure), and chamfers the upper and lower corners of the front and rear ends 16 respectively.
The sponge body 15 is enclosed in a bag 11 of a woven gauze 12 similar to that in the second example.

In the exclusion body of this example, the central part is made into a folding part 17 made of a woven gauze 12 and a sponge body 15 so that it can be folded in two. When folded in half, as shown in FIG. 13, the front half and the rear half of the sponge body 15 overlap to form a block shape. It becomes a block-shaped exclusion body. The elastic sponge body 15 folded in half is subjected to a restoring force to restore the original elongated plate shape by an elastic force. This restoring force can be used to lift or move the organ when the organ is removed.
In addition, the exclusion body is provided with a portion 10 of the fabric gauze 12 having no sponge body at the front end and the rear end, respectively, and the triangular portion 10 is used as a grip portion 10.
Other points are the same as in the second example.

[Fourth example (see FIGS. 14 to 16)]
As shown in FIG. 14, the retraction body for endoscopic surgery of this example has a woven gauze 21 wound around the sponge body 15 of the third example.
The fabric gauze 21 is a cotton fabric gauze with a medical X-ray contrast yarn 8 similar to that in the first example, and has a square shape. Square gauze has each side parallel to the warp or weft. The diagonal line is longer than the length of the sponge body 15 in the front-rear direction similar to that in the third example. One diagonal line is arranged in the front-rear direction.
As shown in FIG. 15, the square-shaped woven gauze 21 has a sponge body 15 with chamfered front and rear ends 16 superimposed on a diagonal line in the front-rear direction. The diagonal line in the front-rear direction of the fabric gauze 21 and the front-rear direction of the sponge body 15 are matched. Next, the fabric gauze 21 folds the triangular portion on one side of the elongated plate-like sponge body 15 to the sponge body 15 side and folds the other triangular portion to the sponge body 15 side to form the sponge body 15. Wrap. As shown in FIG. 16, the square woven gauze 21 is wound around an elongated plate-like sponge body 15. The fabric gauze 21 sews the overlapping portion immediately before and the immediately following overlapping portion of the sponge body 15 with the thread 22 in the transverse direction. The sponge body 15 is covered with a fabric gauze 21.

The extruding body of this example has a central portion that can be folded in half by forming a bent portion 23 composed of a fabric gauze 21 and a sponge body 15. When folded in half, as in the third example, it becomes a block shape and a restoring force acts.
Further, the exclusion body has a front end and a rear end, a front portion of the front yarn 22 and a rear portion of the rear yarn 22 as a grip portion 24 of the fabric gauze 21 having no sponge body. As in the third example, the trocar T can be inserted from either the front or rear end. When passing through the trocar T, the fabric gauze 21 contacts the trocar T, and the sponge body 15 does not contact the trocar T.
Other points are the same as in the third example.

[Fifth example (see FIGS. 17 to 21)]
In the extruding body for endoscopic surgery of this example, the sponge body 31 is formed in a wedge shape, and the woven gauze bag 38 is constituted by a single gauze.
As shown in FIGS. 17 and 18, the sponge body 31 has a rectangular plate shape elongated in the front-rear direction (left-right direction in the figure), and the upper side surface has a front-down slope surface and is wedge-shaped. The front end 32 has a smaller cross section than the rear end.

In the bag 35, one woven gauze 36 is folded in two and the edges are sewn together with a thread.
As shown in FIG. 19, the fabric gauze 36 has a trapezoidal shape that rolls over, and the front end 37 is shorter than the rear end. As in the first example, this fabric gauze 36 is a cotton fabric gauze with a medical X-ray contrast yarn 8, and the warp and weft directions of the gauze are inclined at 45 degrees with respect to the longitudinal direction of the fabric gauze 36. Is arranged.
The fabric gauze 36 with the X-ray contrast yarn 8 is bent along the center line in the front-rear direction and folded into two as shown in FIG. As shown in FIG. 21, the fabric gauze 36 folded in half is folded at the lower edge, and the front edge and the upper edge are sewn together with a thread 38 to form a bag 39. Open the trailing edge. The sewn bag 39 is turned upside down so that the inside and outside of the bag 39 are reversed, and the front edge and the upper edge that are sewn together with the thread 38 are arranged on the inside. In this bag 39, the sponge body 31 is inserted from the front end 32 through the opening at the rear edge, and the opening at the rear edge is sewn with a thread and closed. The sponge body 31 and the bag 39 are aligned in the front-rear direction. The sponge body 31 is covered with a fabric gauze 36.

In the exclusion body of this example, the front end and the front side portion of the sponge body 31 are made the portion of the fabric gauze 36 without the sponge body and the grip portion 40.
The grasping portion 40 is grasped by the grasping portion of the forceps and pulled into the opening of the trocar T. Then, the grip part 40 side of the fabric gauze 36 comes into contact with the opening edge of the trocar T, and the front-rear direction to enter the trocar T is expanded, and the perpendicular direction is contracted. By this reduction, the radial direction of the trocar T is reduced on the grip portion 40 side of the sponge body 31. The thickness is reduced to a tapered shape. It becomes easy to enter the trocar T. The behavior when the exclusion body enters the trocar T is the same as in the first example.
The exclusion body of this example has a wedge shape. When excluding an organ, it is easy to insert it between organs.
Other points are the same as in the first example.

[Sixth example (see FIGS. 22 and 23)]
The retraction body for endoscopic surgery of this example has two sponge bodies 31 in the fifth example, arranged in the front and back, and the central portion between both sponge bodies 31 can be bent. Moreover, the grip part 40 is provided in the front end and the rear end, respectively.
As shown in FIG. 22, the sponge bodies 31 similar to those in the fifth example are arranged in a front-and-rear direction, the long ends opposite to the front ends 32 face each other, and are spaced apart. Both sponge bodies 31 are sealed in a woven gauze bag 41 in this arrangement.
In the bag 41, as in the fifth example, one woven gauze is folded in two and the edges are sewn together with a thread.
As in the first example, the fabric gauze of the bag 41 is a cotton fabric gauze with a medical X-ray contrast yarn 8, and the direction of warp and weft of the gauze is 45 ° to the front and back of the fabric gauze. Is arranged.

In the exclusion body of this example, the central part between the two sponge bodies 31 is made to be foldable into two by using a folded part 42 of a woven gauze without a sponge body. When folded in half, as shown in FIG. 23, two wedge-shaped sponge bodies 31 overlap to form a wedge-shaped block shape. It becomes a wedge-shaped block-shaped exclusion body. Easy to insert between organs.
Moreover, the exclusion body has a front end and a rear end as a part of a woven gauze without a sponge body and a grip part 40, respectively. The trocar T can be inserted from either the front or rear end.
Other points are the same as in the fifth example.

[Modification]
1. In the above embodiment, the fabric gauze is provided with the X-ray contrast yarn 8 but not provided with the X-ray contrast yarn.
2. In the above embodiment, the X-ray contrast yarn is not encapsulated in the fabric gauze bag, but is encapsulated together with the sponge body in the fabric gauze bag. In addition, the X-ray contrast yarn is not wrapped with woven gauze, but is wrapped together with the sponge body with woven gauze. In short, the X-ray contrast yarn is covered with a woven gauze together with the sponge body.
3. In the above embodiment, the fabric gauze is a cotton fabric, but other fabrics.

T Trocar 1 Sponge body 2 Sponge body front end 5 Woven gauze bag 6 Woven gauze 7 Woven gauze front end 8 X-ray contrast yarn 9 Yarn 10 Woven gauze-only part, grip 11 Woven gauze bag 12 Woven gauze 13 Woven gauze Front end, rear end 14 Folding part 15 Sponge body 16 Both ends 17 of the sponge body 17 Bending part 21 Fabric gauze 22 Yarn 23 Bending part 24 Grip part 31 Sponge body 32 Sponge body front end 36 Fabric gauze 37 Fabric gauze front end 38 Yarn 39 Bag 40 Grasping part 41 Woven gauze bag 42 Bending part

Claims (9)

In the retraction body for endoscopic surgery that is grasped with forceps and brought into the patient's body cavity through the trocar,
Having sponge body and woven gauze,
The sponge body is covered with a fabric gauze, and when entering and passing through the trocar, the fabric gauze contacts the trocar and the sponge body does not contact the trocar.
An extruding body characterized in that a fabric gauze part without a sponge body is provided at a position on the front side of the sponge body when passing through the trocar, and this part is used as a gripping part grasped with forceps.   The evacuation body according to claim 1, wherein the woven gauze is formed into a bag, and a sponge body is enclosed in the woven gauze bag.   2. The exclusion body according to claim 1, wherein the fabric gauze is wound around a sponge body.   4. The exclusion body according to claim 1, wherein the woven gauze has a warp yarn or a weft yarn arranged obliquely with respect to the trocar entry direction of the sponge body. Sponge body is plate-shaped, made into two pieces,
The two sponge bodies are arranged in the front and back, facing each other, spaced apart, and covering both sponge bodies in this arrayed state with woven gauze,
5. The exclusion body according to any one of claims 1 to 4, wherein a portion between the two sponge bodies is formed into a folded portion so that the sponge body can be folded in two, and the two sponge bodies overlap to form a block shape. .   The sponge body is made into an elongated plate, and the center part can be folded in half so that it can be folded in half. The retraction body according to any one of claims 1 to 4, wherein a restoring force is applied.   7. Relief according to any one of claims 1 to 6, wherein the front end and the rear end are each provided with a portion of a fabric gauze without a sponge body, and each of these portions is a gripping portion to be gripped with forceps. body.   The exclusion body according to any one of claims 1 to 7, wherein the fabric gauze is provided with an X-ray contrast yarn.   The X-ray contrast yarn is covered with a woven gauze together with a sponge body, and the exclusion body according to any one of claims 1 to 8.

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