阅读说明：本技术 医疗器械 (Medical instrument ) 是由 荒卷直希 甲斐美穗 藤井杏梨 内富研介 于 2020-03-27 设计创作，主要内容包括：提供一种能够减小外科手术等的术后的缝合不良的危险的医疗器械。医疗器械(100)具备：愈合促进片(110),其具有促进生物体组织的愈合的愈合促进部(110A)、和与愈合促进部相比设于面方向的外方侧的框部(110B)；牵引部(120),其与愈合促进片连接,且伴随牵引操作使第2区域变形,以覆盖成为接合对象的生物体器官的外周面的至少一部分。(Provided is a medical device which can reduce the risk of poor suturing after surgery or the like. A medical device (100) is provided with: a healing promotion sheet (110) having a healing promotion section (110A) that promotes healing of a living tissue, and a frame section (110B) that is provided on the outer side in the planar direction relative to the healing promotion section; and a traction unit (120) which is connected to the healing promoting sheet and which deforms the 2 nd region to cover at least a part of the outer peripheral surface of the living body organ to be joined, in association with the traction operation.)

1. A medical device is characterized by comprising:

a healing promotion sheet having a 1 st region for promoting healing of a living tissue and a 2 nd region provided on the outer side in the plane direction than the 1 st region; and

and a traction unit which is connected to the healing promoting sheet and deforms the 2 nd region to cover at least a part of an outer peripheral surface of a living body organ to be joined in association with a traction operation.

2. The medical device of claim 1,

the traction portion has a connection portion connected to the 2 nd region and a non-connection portion that is not connected to the 2 nd region and that pulls out the healing promoting sheet outward.

3. The medical device of claim 2,

the connecting portion is connected to the 2 nd region by a length of more than half of the healing promoting sheet in the circumferential direction.

4. The medical device of claim 2 or 3,

at least a part of the connecting portion has a rigidity greater than that of the non-connecting portion.

5. The medical device according to any one of claims 1 to 4,

the traction unit is formed of a string-shaped member or a belt-shaped member having a predetermined length.

6. The medical device according to any one of claims 1 to 5,

the adjustment portion is provided, and the adjustment portion can adjust the deformation amount of the 2 nd area by limiting the traction operation of the traction portion.

7. The medical device according to any one of claims 1 to 6,

the 2 nd region has a plurality of protrusions arranged in the circumferential direction of the healing promoting sheet,

each of the plurality of protruding portions has a hole portion through which the traction portion can be inserted.

Technical Field

The present invention relates to medical devices.

Background

In the field of medical treatment, surgical treatment (for example, anastomosis of a digestive tube) for joining organism organs by surgical operation is known. It is also known that, when such a surgical treatment is performed, a delay in healing at a joint portion where living organs are joined to each other is not caused, and this is particularly important as a prognostic determinant after surgery.

Various methods and medical instruments are used for surgical treatment for joining living organs, but for example, a method of suturing a living organ with a biodegradable suture thread or a method using a mechanical joining device for performing anastomosis by a stapler (see patent document 1) have been proposed. In particular, when performing anastomosis using a mechanical joining apparatus, the joining force between living organs at the joint can be increased as compared with a method using a suture thread, and therefore, the risk of suture failure can be reduced.

Documents of the prior art

Patent document

Patent document 1: JP 2007-505708 publication

Disclosure of Invention

However, the degree of progress of healing in the joint portion also depends on the state of the living tissue in the joining target site (the site to be joined) of the patient, and the like. Therefore, for example, when the joining device described in patent document 1 is used, there is a possibility that the risk of suture failure cannot be sufficiently reduced depending on the state of the living tissue of the patient.

Accordingly, an object of the present invention is to provide a medical device capable of reducing the risk of a suture failure after a surgical operation or the like.

A medical device according to an embodiment of the present invention includes: a healing promotion sheet having a 1 st region for promoting healing of a living tissue and a 2 nd region provided on the outer side in the plane direction than the 1 st region; and a traction unit that is connected to the healing promoting sheet and deforms the 2 nd region to cover at least a part of an outer peripheral surface of a living body organ to be joined in association with a traction operation.

Effects of the invention

According to the medical device of the present invention, the healing promoting sheet is interposed between the to-be-joined portions of the living organs to be joined, whereby the healing of the living tissues of the living organs can be promoted. Further, the person performing the operation can deform the 2 nd region of the healing promoting sheet by pulling the pulling portion so as to cover at least a part of the outer peripheral surface of the living body organ to be joined. Thus, the person who performs the operation can stably hold the healing promoting sheet in the living body organ, and can suppress the twisting or the displacement of the healing promoting sheet during the period when the operation treatment is performed. Therefore, the risk of suturing failure of the living organ can be effectively reduced.

Drawings

Fig. 1A is a perspective view showing one embodiment of the medical device of the present invention.

Fig. 1B is a perspective view showing a use example of the medical device of fig. 1A.

Fig. 2 is a cross-sectional view showing a part of a cross section taken along line 2A-2A of fig. 1A in an enlarged manner.

Fig. 3 is a plan view showing an example of the shape of the traction portion formed of a string-like member.

Fig. 4A is a perspective view showing a modification 1 of the medical device of the present invention.

Fig. 4B is a plan view showing an example of the shape of the traction portion formed of a belt-like member.

Fig. 5A is a perspective view showing an example of use of modification 2 of the medical device of the present invention.

Fig. 5B is a perspective view showing an example of use of modification 3 of the medical device of the present invention.

Fig. 6A is a perspective view showing a modification 4 of the medical device of the present invention.

Fig. 6B is a perspective view showing a modification 5 of the medical device of the present invention.

Fig. 7 is a flowchart illustrating steps of a medical procedure method using a medical instrument.

Fig. 8 is a flowchart illustrating steps of an embodiment of a medical procedure method (pancreatic parenchyma-jejunostomy).

Fig. 9 is a schematic perspective view for explaining pancreatic parenchyma-jejunostomy.

Fig. 10 is a schematic perspective view for explaining pancreatic parenchyma-jejunostomy.

Fig. 11 is a schematic perspective view for explaining pancreatic parenchyma-jejunostomy.

Fig. 12 is a schematic perspective view for explaining pancreatic parenchyma-jejunostomy.

Fig. 13 is a schematic cross-sectional view for explaining a pancreatic parenchyma-jejunostomy.

Fig. 14 is a schematic perspective view for explaining pancreatic parenchyma-jejunostomy.

Fig. 15 is a schematic perspective view for explaining pancreatic parenchyma-jejunostomy.

Fig. 16 is a schematic perspective view for explaining pancreatic parenchyma-jejunostomy.

Fig. 17 is a plan view showing a traction unit according to another modification.

Fig. 18 is a view schematically showing an example of use of a medical device having a traction unit according to another modification.

Fig. 19 is a view schematically showing an example of use of a medical device having a traction unit according to another modification.

Fig. 20 is a view schematically showing an example of use of a medical device having a traction unit according to another modification.

Fig. 21 is a view schematically showing an example of use of a medical device having a traction unit according to another modification.

Fig. 22 is a view schematically showing an example of use of a medical device having a traction unit according to another modification.

Detailed Description

Hereinafter, embodiments of the present invention will be described with reference to the attached drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted. For convenience of explanation, the dimensional ratios in the drawings are exaggerated and different from the actual ratios.

Fig. 1A is a perspective view illustrating one mode of a medical device 100. Fig. 1B is a perspective view showing an example of use of the medical device 100 of fig. 1A. Fig. 2 is a cross-sectional view showing a part of a cross section taken along line 2A-2A of fig. 1A in an enlarged manner. Fig. 3 (a) to 3 (C) are plan views showing examples of the shape of the draft part 120.

< medical device 100 >

As shown in fig. 1A, the medical device 100 includes a healing promoting sheet 110 disposed between living organs to be joined and a pulling portion 120 provided on the healing promoting sheet 110.

As shown in fig. 9 to 16, the medical device 100 can be applied to a surgical treatment (e.g., an anastomosis of a digestive tract) for joining predetermined living organs to each other. As will be described later, in the description of the present specification, a pancreatic parenchyma-jejunostomy is described as an example of a surgical treatment using the medical device 100.

< healing promoting tablet 110 >

As shown in fig. 1A, the healing promoting sheet 110 has a healing promoting portion (corresponding to "region 1") 110A that promotes healing of a living tissue formed from a biodegradable sheet having a plurality of through-holes 112. The healing promoting portion 110A is formed within a predetermined range including the center portion C in the plane direction of the healing promoting sheet 110.

The healing promotion sheet 110 has a frame portion (corresponding to "2 nd region") 110B provided on the outer side in the planar direction of the healing promotion sheet 110 than the healing promotion portion 110A. The frame 110B is formed in a certain range including the outer peripheral edge O of the healing promoting sheet 110 so as to surround the periphery of the healing promoting portion 110A. In the present embodiment, the through-hole 112 is not formed in the frame portion 110B.

< healing-promoting part 110A >

As shown in fig. 1A, the through-holes 112 formed in the healing promoting portion 110A are regularly and periodically arranged in the plane direction of the healing promoting sheet 110. Here, the through-holes 112 may be randomly provided at each portion in the planar direction of the healing promoting sheet 110.

As shown in fig. 2, each through-hole 112 extends substantially perpendicularly between the front surface 113 and the back surface 114 in the thickness direction (vertical direction in fig. 2) of the healing promoting sheet 110. In addition, each through-hole 112 may be bent or curved in a zigzag shape between the front surface 113 and the back surface 114 in a cross section in the thickness direction of the healing promoting sheet 110.

Each through-hole 112 has a substantially circular planar shape (a shape when a front surface 113 of the healing promoting sheet 110 or a back surface 114 of the healing promoting sheet 110 is viewed in plan). However, the planar shape of each through-hole 112 is not particularly limited, and may be, for example, an oval shape or a polygonal shape (such as a rectangular shape or a triangular shape). In addition, the planar shape or the sectional shape may be different for each through-hole 112.

The healing promoting sheet 110 has a substantially circular planar shape. However, the planar shape of the healing promoting sheet 110 is not particularly limited, and may be, for example, an oval shape or a polygonal shape (a rectangular shape, a triangular shape, or the like).

The thickness (dimension T shown in FIG. 2) of the healing promoting sheet 110 is not particularly limited, but is preferably 0.05 to 0.3mm, and more preferably 0.1 to 0.2 mm. In the case where the thickness of the healing promoting sheet 110 is 0.05mm or more (particularly, 0.1mm or more), the strength of the healing promoting portion 110A can be made to be sufficient not to damage it when the healing promoting sheet 110 is handled. On the other hand, in the case where the thickness of the healing promoting sheet 110 is 0.3mm or less (particularly, 0.2mm or less), the healing promoting portion 110A can have sufficient flexibility required to closely adhere to the living tissue to which the healing promoting sheet 110 is applied and follow the living tissue.

The healing promoting portion 110A preferably has a ratio of the diameter D of the through-hole 112 (distance D shown in fig. 2) to the pitch P of the through-hole 112 (distance P shown in fig. 2, distance between adjacent through-holes 112) of 0.25 or more and less than 40. When the planar shape of the through-hole 112 is a perfect circle, the diameter D of the through-hole 112 is equal to the diameter of the perfect circle. On the other hand, when the planar shape of the through-hole 112 is not a perfect circle, the diameter (circle-equivalent diameter) of a perfect circle having the same area as the area of the opening of the through-hole 112 (the portion facing the front surface 113 or the back surface 114 in the through-hole 112) can be set as the hole diameter D of the through-hole 112.

Since the healing promoting portion 110A has a plurality of through holes 112, there are a plurality of values of the hole diameter D corresponding to each through hole 112. In the present embodiment, when calculating the value of the ratio, the average of two or more points of the values of the hole diameters D corresponding to the through-holes 112 is used as the representative value of the hole diameters D. On the other hand, the pitch P of the plurality of through holes 112 is defined by the shortest distance between the openings of the two through holes 112. Here, as the pitch P value, there are also a plurality of pitch P values corresponding to combinations of adjacent through holes 112. Therefore, in the present embodiment, when calculating the value of the ratio, an arithmetic average value of two or more points of the pitch P values corresponding to the combinations of the adjacent through-holes 112 is used as the representative value of the pitch P.

The pitch P, the diameter D, and the ratio of the diameter D to the pitch P of the through-holes 112 are examples, but are not limited thereto.

The healing promoting portion 110A can be constructed of a biodegradable material. The material of the healing promoting portion 110A is not particularly limited, and examples thereof include biodegradable resins. As the biodegradable resin, for example, known biodegradable (co) polymers such as resins described in JP-A-2011-528275, 2008-514719, 2008-1952, 2004-509205 and the like can be used. Specifically, there are mentioned (1) a polymer selected from the group consisting of aliphatic polyesters, polybasic acid anhydrides, polyorthoesters, polycarbonates, polyphosphazenes, polyphosphates, polyvinyl alcohols, polypeptides, polysaccharides, proteins, and celluloses, and (2) a copolymer composed of one or more monomers constituting the above-mentioned (1). That is, the biodegradable sheet preferably includes a polymer selected from the group consisting of aliphatic polyesters, polybasic acid anhydrides, polyorthoesters, polycarbonates, polyphosphazenes, polyphosphates, polyvinyl alcohols, polypeptides, polysaccharides, proteins, and celluloses, and at least one biodegradable resin selected from the group consisting of copolymers composed of one or more monomers constituting the polymer.

The method for producing the healing promoting portion 110A is not particularly limited, and examples thereof include a method for producing fibers made of the biodegradable resin and producing a mesh-shaped sheet using the fibers. The method for producing the fiber made of the biodegradable resin is not particularly limited, and examples thereof include an electrospinning method (e-spinning method/electrospinning method) and a melt blowing method. The healing promoting portion 110A may be selected and used by only one of the above methods, or two or more of them may be selected and appropriately combined. As another example of the method for producing the healing promoting portion 110A, the biodegradable sheet of the present invention may be produced by spinning fibers made of the biodegradable resin described above in accordance with a conventional method and weaving the obtained fibers into a net shape.

The healing promoting portion 110A induces a biological response from a constituent material such as a biodegradable resin constituting the healing promoting portion 110A. The healing promoting section 110A induces the expression of a biological component such as fibrin by this action. The biological components induced in this manner are collected so as to penetrate through the through-holes 112 of the healing promoting portion 110A, thereby promoting healing. Therefore, by disposing the healing promoting section 110A between the living organs to be joined, the healing is promoted by the above-described mechanism.

The material of the healing promoting portion 110A may be any material that can promote healing of a living organ, and may not be biodegradable. The healing promoting section 110A may be any section as long as it can promote healing of a living organ, and the through-hole 112 may not be formed regardless of the material.

< frame portion 110B >

As shown in fig. 1A, the frame portion 110B is formed on the healing promoting sheet 110 so as to surround the periphery of the healing promoting portion 110A. The frame portion 110B is preferably formed to have a rigidity greater than that of the healing promoting portion 110A so as not to be easily deformed when an external force is applied. The frame portion 110B may be formed of, for example, a biodegradable sheet in which no hole such as the through-hole 112 is formed, or a resin sheet or nonwoven fabric having higher rigidity than the healing promoting portion 110A.

In addition, the frame portion 110B may be provided in the healing promoting sheet 110 by not forming the through-hole 112 in a certain region including the outer peripheral edge O of the biodegradable sheet that is the constituent material of the healing promoting portion 110A. In addition, after the through-holes 112 are formed in a certain region including the outer peripheral edge O of the biodegradable sheet that is a constituent material of the healing promoting portion 110A, the through-holes 112 may be crushed by compressing or heating only this region in the thickness direction, thereby forming a portion in which the constituent materials of the biodegradable sheet are densely gathered, and this portion may be the frame portion 110B.

The frame portion 110B may have a suppression portion for suppressing adhesion to a living organ at least in part thereof. The material constituting the suppression part is not particularly limited as long as adhesion to a living organ can be suppressed, and for example, a nonwoven fabric can be used. The inhibiting portion may be made of a biodegradable material, as in the healing promoting portion 110A.

In the healing promoting sheet 110, the area ratio between the healing promoting portion 110A and the frame portion 110B, the shapes of the healing promoting portion 110A and the frame portion 110B in a plan view, and the like are not particularly limited.

< traction part 120 >

As shown in fig. 1A and 1B, the medical device 100 includes a pulling portion 120 connected to the healing promoting sheet 110, and deforms the frame portion 110B to cover at least a part of the outer peripheral surface of the pancreatic parenchyma B1 to be joined along with the pulling operation.

The traction unit 120 is formed of a string-shaped member having a predetermined length. The traction portion 120 includes a connection portion 121 connected to the frame portion 110B, and a non-connection portion 123 which is not connected to the frame portion 110B and is drawn out to the outer side of the healing promoting sheet 110.

The connecting portion 121 of the traction portion 120 is inserted through the inside of the healing promotion sheet 110. A space (not shown) for slidably inserting the connection portion 121 is formed inside the healing promoting sheet 110. In the present embodiment, as shown in fig. 1B, when the non-connecting portion 123 is pulled in the healing promoting sheet 110, the pulling portion 120 is disposed on the healing promoting sheet 110 such that the frame portion 110B of the healing promoting sheet 110 forms an opening of a bag (pouch) having a space therein. The person performing the operation can adjust the opening area of the opening of the pouch made of the healing promoting sheet 110 by adjusting the amount of traction of the non-connecting portion 123 of the traction portion 120.

A specific method of attaching the traction portion 120 to the healing promoting sheet 110 is not particularly limited. In addition, the traction part 120 may be configured to be separable from the healing promoting sheet 110, or to be additionally installed with another member different from the healing promoting sheet 110.

The traction portion 120 is disposed on the frame portion 110B over half or more of the length of the healing promoting sheet 110 in the circumferential direction. In the present embodiment, as shown in fig. 1B, the connection portions 121 are disposed at corresponding positions on the posterior wall B1c (a circumferential posterior portion of the pancreatic parenchyma B1) side of the pancreatic parenchyma B1. The non-connecting portion 123 is disposed at a position corresponding to the anterior wall B1d (the portion on the ventral side in the circumferential direction of the pancreatic parenchyma B1) of the pancreatic parenchyma B1 of the healing promotion sheet 110. However, the position where the connection portion 121 of the traction portion 120 is disposed on the healing promoting sheet 110 is not particularly limited.

The medical device 100 includes an adjustment portion 150 that can adjust the amount of deformation of the frame portion 110B by limiting the pulling operation of the pulling portion 120. In the present embodiment, the adjustment portion 150 is configured by an annular portion 123a that is a part of the non-connection portion 123, and an insertion portion 123b that is inserted through the annular portion 123 a. The pulling operation of the pulling portion 120 can be restricted by providing a portion of the non-connecting portion 123 with a concave-convex shape, a cut, or the like (a structure shown in fig. 3 or 4, or the like) and fitting the non-connecting portion 123 to the annular portion 123 a. Further, with the above configuration, the adjustment unit 150 also has a function as the lock mechanism 160 that maintains a state in which the person performing the operation pulls the traction unit 120 with a finger or the like, but maintains a state in which the person is automatically pulled. The adjustment unit 150 and the lock mechanism 160 may be configured by a fixing member or the like that is different from the traction unit 120, for example. At least a part of the non-connecting portion 123 may not pass through the annular portion 123 a.

The traction portion 120 can be formed of, for example, a thermoplastic elastomer such as vinyl chloride, a polyurethane elastomer, a polystyrene elastomer, a styrene-ethylene-butylene-styrene copolymer (SEBS), or a styrene-ethylene-propylene-styrene copolymer (SEPS), a thermoplastic resin such as nylon or PET, or a metal such as rubber, a silicone elastomer, a textile material, a SUS wire, a copper wire, a titanium wire, or a nickel-titanium alloy wire. The traction portion 120 can be formed of the same material as the healing promoting portion 110A, for example. By forming the healing promoting portion 110A of the same material, the healing promoting portion 110A can be manufactured at the same manufacturing location, and therefore, the manufacturing operation is facilitated.

Fig. 3 shows an example of the shape of the traction portion 120. As shown in fig. 3 (a), the traction portion 120A can be configured by a string-like member having a wavy outer shape, for example. As shown in fig. 3B, for example, the traction portion 120B may be formed of a string-like member having a knot-like outer shape (a shape in which convex portions and concave portions are alternately formed in the extending direction). As shown in fig. 3 (C), the pulling portion 120C may be formed of a string-like member having an outer shape in which one end edge intersecting the extending direction is formed linearly and the other end edge is formed in a wavy form. For example, by forming the traction portion 120A and the traction portion 120B of a stretchable material, the structure can be formed so as to be linearly deformed when the traction operation is performed and so as to be restored to the original shape when the traction operation is performed. With such a configuration, when the traction portions 120A and 120B are pulled, friction between the traction portions 120A and 120B and the healing promoting sheet 110 can be reduced, and damage to the healing promoting sheet 110 can be prevented. Further, since the end edge of the traction portion 120C shown in fig. 3 (C) on the side intersecting the extending direction is formed linearly, the friction with the healing promoting sheet 110 can be further reduced.

As described later, the traction portion 220 may be configured by a belt-like member (see fig. 4A and 4B). In the present specification, a band-shaped member can be defined as a member having a larger cross-sectional area than a string-shaped member. As an example of the band-shaped member, a member having a long side and a short side formed in a cross-sectional shape thereof can be cited, but the present invention is not limited thereto.

Fig. 1B shows a condition when the healing promoting sheet 110 is disposed in pancreatic parenchyma Ba. The person who performed the operation is disposed so that the healing promoting portion 110A of the healing promoting sheet 110 overlaps the section B1a of the pancreatic parenchyma Ba. At this time, the person performing the operation places the non-joint section 123 of the retractor section 120 on the front wall B1d side of the pancreas parenchyma B1 (the portion on the ventral side in the circumferential direction of the pancreas parenchyma B1). The person who performs the operation deforms the frame portion 110B by pulling the pulling portion 120 in a direction away from the pancreatic parenchyma B1 on the anterior wall B1d side of the pancreatic parenchyma B1. When the traction portion 120 is pulled, the healing promoting sheet 110 deforms into a bag shape so as to cover a part of the outer peripheral surface of the pancreatic parenchyma B1. When the operator pulls the pulling unit 120 by a predetermined length, the adjustment unit 150 restricts the pulling operation thereafter. This can prevent pancreatic parenchyma B1 from being excessively tied by traction unit 120. By deforming the healing promoting sheet 110 in such a manner as to cover the pancreatic parenchyma B1, the healing promoting sheet 110 can be stably held to the pancreatic parenchyma B1.

As described above, the medical device 100 of the present embodiment includes: a healing promotion sheet 110 having a healing promotion section 110A that promotes healing of a living tissue formed from a biodegradable sheet having a plurality of through-holes 112, and a frame section 110B provided on the outer side in the planar direction than the healing promotion section 110A; and a pulling section 120 connected to the healing promoting sheet 110, and configured to deform the frame section 110B to cover at least a part of an outer peripheral surface of the living body organ to be joined in accordance with a pulling operation.

According to the medical device 100 configured as described above, the healing promoting sheet 110 is sandwiched between the to-be-joined portions of the living organs to be joined, whereby the healing of the living tissues of the living organs can be promoted. Further, the person performing the operation can deform the frame portion 110B of the healing promoting sheet 110 by pulling the pulling portion 120 so as to cover at least a part of the outer peripheral surface of the living body organ to be joined. This enables the person performing the operation to stably hold the healing promoting sheet 110 in the living body organ, and prevent the healing promoting sheet 110 from being twisted or dislocated during the period of performing the operation treatment. Therefore, the risk of suturing failure of the living body organ can be effectively reduced.

The traction portion 120 includes a connection portion 121 connected to the frame portion 110B, and a non-connection portion 123 that is not connected to the frame portion 110B and pulls out the healing promoting sheet 110 to the outside. Therefore, the person performing the operation can deform the frame portion 110B to cover the outer peripheral surface of the living body organ by a simple operation of pulling the non-connecting portion 123.

The connection portion 121 is connected to the frame portion 110B by a length equal to or more than half of the length in the circumferential direction of the healing promoting sheet 110. Therefore, the person performing the operation can deform the healing promoting sheet 110 into a desired shape more reliably by pulling the pulling portion 120.

The traction unit 120 is formed of a string-shaped member having a predetermined length. Therefore, the person performing the operation can easily deform the healing promoting sheet 110 into a desired shape by pulling the pulling portion 120.

The medical device 100 further includes an adjustment unit 150, and the adjustment unit 150 can adjust the amount of deformation of the frame 110B by limiting the pulling operation of the pulling unit 120. Therefore, the operator can prevent the living body organ from being excessively tightened by the traction unit 120.

The frame portion 110B can suppress adhesion of the frame portion 110B to a living organ other than the living organ to be joined, by the suppressing portion for adhesion to the living organ.

Next, a modification of the above embodiment will be described. In the description of the modified example, the detailed description of the constituent members and the like already described in the above embodiment is omitted. Note that, the description of the modified examples is not particularly limited, and the modified examples can be regarded as the same as the above-described embodiments.

< modification 1 >

Fig. 4A is a perspective view of the medical device 200 according to modification 1, and fig. 4B is a view for explaining an example of the shape of the traction portion 120 of the medical device 200 according to modification 1.

As shown in fig. 4A, the traction portion 220 included in the medical device 200 according to modification 1 is formed of a band-shaped member. The traction portion 220 includes a connection portion 221 connected to the frame portion 110B, and a non-connection portion 223 that pulls out the healing promoting sheet 110 outward. The non-connection portion 223 is provided with an adjustment portion 150 including an annular portion 223a and an insertion portion 223b into which the annular portion 223a is inserted.

As shown in fig. 4B (a), the pulling portion 220 may be configured by a band-shaped member linearly extending with a substantially predetermined width. As shown in fig. 4B (B), the pulling portion 220A may be formed by a band-shaped member having a protrusion 225 formed at a substantially central portion in the extending direction and protruding in the width direction intersecting the extending direction. The traction portion 220A can improve the holding force of the healing promoting sheet 110 with respect to the living organ as compared with the traction portion 220. As shown in fig. 4B (C), the pulling portion 220B may be formed of a band-shaped member formed so that the width thereof gradually increases toward the substantially central portion in the extending direction. When the traction portion 220B is configured to be detachable from the healing promoting sheet 110, the insertion (connection) of the traction portion 220B into the healing promoting sheet 110 is easily released. As shown in fig. 4B (D) and 4B (E), the rigidity of the both end portions 226 and the central portion 227 in the width direction of the traction portions 220C and 220D may be different from each other. In each of the tractors, the rigidity of a part of the traction units 220C and 220D is formed to be higher than that of the other part, so that the traction units 220C and 220D can be prevented from being damaged when the traction operation is performed. As shown in fig. 4B (F), the pulling portion 220E may be provided with slits 228a and 228B extending in the width direction, or a hole 229 formed in the center in the width direction and extending in the extending direction. The person performing the operation can restrict the pulling operation of the pulling portion 220E by passing the pulling portion 220E through the hole 229 and hooking the side surface of the pulling portion 220E to the slits 227a and 228 b. Each of the traction portions formed of a band-shaped member may be formed in a planar shape similar to the example of the shape of the string-shaped member shown in fig. 3.

In the medical device 200, since the traction portion 220 is formed of a band-shaped member, the contact area between the traction portion 220 and the pancreatic parenchyma B1 is increased as compared with the case where the traction portion 220 is formed of a string-shaped member. Accordingly, the medical device 200 can improve the holding force of the healing promoting sheet 110 with respect to the pancreatic parenchyma B1.

< modification 2 >

Fig. 5A is a perspective view for explaining an example of use of the medical device according to modification 2.

The connecting portion 321 of the traction portion 320 may have a 1 st portion 321a having rigidity greater than that of the non-connecting portion 123 and a 2 nd portion 321b having rigidity smaller than that of the 1 st portion 321 a. As shown in fig. 5A, the 1 st sites 321a and the 2 nd sites 321b can be alternately arranged in the circumferential direction of the healing promoting sheet 110. By having the 1 st site 321a, the traction portion 320 can improve the holding force of the healing promotion sheet 110 with respect to the pancreatic parenchyma B1 on the posterior wall B1c (the portion on the back side in the circumferential direction of the pancreatic parenchyma B1) side of the pancreatic parenchyma B1.

< modification 3 >

Fig. 5B is a perspective view for explaining an example of use of the medical device according to modification 3.

The medical device may, for example, have a retaining member 180 that is mountable to the healing promoting sheet 110. The holding member 180 can be configured by a member having higher rigidity than the pulling portion 320, for example. Further, holding member 180 may be configured to have a C-shaped outer shape that can be arranged along a portion of the outer peripheral surface of pancreatic parenchyma B1 on the rear wall B1C (portion on the back side in the circumferential direction of pancreatic parenchyma B1) side. The person who performed the operation can hold the healing promoting sheet 110 more stably with respect to the pancreatic parenchyma B1 by arranging the holding member 180 so as to hook the pancreatic parenchyma B1.

< modification 4 >

Fig. 6A is a perspective view of a medical device 400 according to modification 4.

The frame 410B of the healing promotion sheet 410 of the medical device 400 according to modification 4 includes a plurality of protrusions 411a, 411B, and 411c arranged in the circumferential direction of the healing promotion sheet 410. The protruding portions 411a, 411b, and 411c each have a hole portion 412 through which the pulling portion 120 can be inserted. A predetermined space (gap) g is formed between the protrusions 411a, 411b, and 411 c. Each of the protruding portions 411a, 411b, 411c has a substantially triangular planar shape.

The person performing the operation can deform the respective protruding portions 411a, 411B, and 411c along the outer peripheral surface of the pancreatic parenchyma B1 by pulling the pulling portion 120. The protrusions 411a, 411B, and 411c are arranged to cover at least a part of the outer peripheral surface of the pancreatic parenchyma B1. The protrusions 411A, 411B, and 411c are more easily deformed when subjected to a pulling operation than the frame portion 110B (see fig. 1A). Therefore, the protrusions 411a, 411B, and 411c can be deformed more reliably so as to follow the outer peripheral surface of the pancreatic parenchyma B1.

< modification 5 >

Fig. 6B is a perspective view of a medical device 500 according to modification 5.

The frame portion 510B of the healing promoting sheet 510 of the medical device 500 of modification 5 has four protruding portions 511a, 511B, 511c, and 511 c. The protruding portions 511a, 511b, 511c, and 511d each have a hole 512 through which the traction portion 120 can be inserted. A predetermined space (gap) g is formed between the projections 511a, 511b, 511c, and 511 d. Each of the projections 511a, 511b, and 511c has a substantially rectangular planar shape. In the medical device 500 of modification 5, as in the medical device 400 of modification 4, when the traction unit 120 is pulled, the protrusions 511a, 511B, 511c, and 511d are easily deformed, and therefore, can be more reliably deformed along the outer peripheral surface of the pancreatic parenchyma B1. The shape, number, and the like of the protruding portions shown in modifications 4 and 5 are not particularly limited.

< method for implementing medical treatment (organism organ anastomosis) >

Next, a medical procedure method using the medical instrument will be described.

Fig. 7 is a flowchart illustrating steps of a medical procedure method using a medical instrument.

The medical treatment method comprises the following steps: preparing a medical device having a healing promoting sheet provided with a traction portion (S11); disposing the healing promoting sheet at one of the engaged parts (S12); deforming the healing promoting sheet by pulling the pulling portion (S13); fixing the healing promoting sheet to one of the engaged parts (S14); the one site to be engaged and the other site to be engaged are engaged in a state where at least a part of the healing promoting sheet is disposed between the one site to be engaged and the other site to be engaged (S15).

The living body organ to be joined by the medical treatment method and the site to be joined in the living body organ are not particularly limited and can be arbitrarily selected. In the following description, a pancreatic parenchyma-jejunostomy is taken as an example for explanation. The above described medical procedure can also be applied to a large intestine anastomosis or a gastric tube anastomosis. As a medical instrument used for each surgical treatment described below, for example, an arbitrary instrument can be selected from the above-described medical instruments. In the following description, however, a typical example of a specific medical instrument that can be suitably used for each surgical treatment will be described. In each of the surgical procedures described below, detailed descriptions of known surgical procedures, known medical devices, medical instruments, and the like are omitted as appropriate.

Hereinafter, in the description of the present specification, "placement of a healing promoting sheet between living organs" means at least one of placement of the healing promoting sheet in a state in which the healing promoting sheet is in direct or indirect contact with a living organ, placement of the healing promoting sheet in a state in which a space is formed between the healing promoting sheet and the living organ, or placement of the healing promoting sheet in both states (for example, placement of the healing promoting sheet in a state in which the healing promoting sheet is in contact with one living organ, and placement of the healing promoting sheet in a state in which the healing promoting sheet is not in contact with the other living organ). In the description of the present specification, "peripheral" means a predetermined range (region), and does not mean a strict range (region), as long as the purpose of medical measures (joining of living organs) can be achieved. In addition, the procedure of the surgical treatment described in each medical procedure method may be changed in order as long as the purpose of the medical procedure is achieved.

< method for implementing medical treatment (pancreatic parenchyma-jejunostomy) >

Fig. 8 is a flowchart showing steps of an embodiment of a medical treatment method (pancreatic parenchyma-jejunostomy), and fig. 9 to 16 are diagrams for explaining the pancreatic parenchyma-jejunostomy.

In the medical treatment method of the present embodiment, the living organs to be joined are pancreas parenchyma B1 and jejunum B2 after pancreaticoduodenectomy. In the following description, a procedure of joining the periphery of the cut surface B1a of the pancreas parenchyma B1 (one of the joined sites) and an arbitrary site of the intestinal wall of the jejunum B2 (the other of the joined sites) will be described. In the present embodiment, an example of use of the medical device 100 shown in fig. 1A will be described.

As shown in fig. 8, the medical procedure of the present embodiment includes preparing a medical device 100 having a healing promoting sheet 110 provided with a traction portion 120 (S101), disposing the healing promoting sheet 110 on a section B1a of a pancreatic parenchyma B1 (S102), deforming the healing promoting sheet 110 by pulling the traction portion 120 (S103), fixing the healing promoting sheet with a fixing member (S104), sandwiching the healing promoting sheet 110 between the pancreatic parenchyma B1 and a jejunum B2 (S105), joining the healing promoting sheet 110 between the pancreatic parenchyma B1 and the jejunum B2 in a state of sandwiching the healing promoting sheet 110 therebetween (S106), and leaving the healing promoting sheet 110 between the pancreatic parenchyma B1 and the jejunum B2 (S107).

Next, an example of the medical procedure method according to the present embodiment will be specifically described with reference to fig. 9 to 16. In fig. 14, a plurality of double-headed sewing needles 920a to 920e, which will be described later, are omitted.

As shown in fig. 9, the operative person positions the back surface 114 (or surface 113) of the healing promoting segment 110 opposite the cut-out B1a of pancreatic parenchyma B1. The person who performs the operation is disposed so that the connection portion 123 is located on the outer side of the cut surface B1a in the planar direction. The person performing the operation can deform the healing promoting sheet 110 by pulling the pulling portion 120 so that the frame portion 110B covers a part of the outer peripheral surface of the pancreatic parenchyma B1. By performing such an operation, the person who performs the operation can hold the healing promoting portion 110A in a state where the healing promoting portion 110A is brought into close contact with the cut surface B1a of the pancreatic parenchyma B1 (see fig. 1B).

When the healing promoting sheet 110 is disposed on the section B1a of the pancreatic parenchyma B1, the person who performs the operation can adopt the following procedure. First, the person who performs the operation forms the hole portion 130 in the healing promoting sheet 110 by pressing the end portion 911 (or the end portion 912) of the pancreatic duct infusion tube 910 against the healing promoting sheet 110. The operator inserts the pancreatic duct infusion tube 910 into jejunum B2 so that the end 911 of the pancreatic duct infusion tube 910 passes through the inside of jejunum B2 from the through-hole B2a of the planned anastomosis site of jejunum B2 and goes out of the through-hole B2B of jejunum B2 to the outside of jejunum B2.

Next, the person who performed the operation temporarily inserts the end 912 of the pancreatic duct infusion tube 910 into the pancreatic duct B1B of the pancreatic parenchyma B1, with the pancreatic duct infusion tube 910 inserted through the hole portion 130 of the healing promoting sheet 110 and holding the healing promoting sheet 110.

As the pancreatic duct infusion tube 910, for example, a known resin infusion tube having a knot portion (protrusion) for preventing the pull-out formed at the end portion 912 can be used. The pancreatic duct infusion tube 910 temporarily inserted into the pancreatic duct B1B suppresses leakage of body fluid such as pancreatic juice from the pancreatic duct B1B during surgical treatment. According to such a procedure, the person performing the operation can perform the placement of the healing promoting sheet 110 and the temporary insertion of the pancreatic duct infusion tube 910 once.

When the person performing the operation forms the hole 130 through which the pancreatic duct infusion tube 910 is inserted, the person may use other instruments instead of the pancreatic duct infusion tube 910. The hole 130 for inserting the pancreatic duct infusion tube 910 therethrough may be formed in advance in the healing promoting sheet 110 before use. In addition, the person who performs the operation may temporarily insert the pancreatic duct infusion tube 910 into the pancreatic duct B1B after disposing the healing promoting sheet 110 on the section B1a of the pancreatic parenchyma B1.

Next, the person who performed the operation fixes the healing promoting sheet 110 to the pancreatic parenchyma B1 using the fixing member. In the following description, an example of a procedure of fixing the healing promoting sheet 110 to the pancreatic parenchyma B1 using the plurality of double-headed suture needles 920a to 920e with sutures as fixing members will be described. As the double-ended suture needles 920a to 920e, a known double-ended suture needle including an absorbable thread (suture thread) having bioabsorbability and biocompatible needle portions attached to both ends of the absorbable thread can be used. The double-headed suture needles 930 and 940a to 940e described later are also configured to include an absorbent thread and a needle portion.

First, as shown in fig. 10, the person who performed the operation moves the double-headed suture needle 920a from the rear wall B1c of the pancreatic parenchyma B1 (the portion on the back side in the circumferential direction of the pancreatic parenchyma B1) and the portion of the healing promotion sheet 110 disposed on the rear wall B1c toward the front wall B1d of the pancreatic parenchyma B1 and the portion of the healing promotion sheet 110 disposed on the front wall B1d, while holding the healing promotion sheet 110 with respect to the pancreatic parenchyma B1. Next, the person performing the operation moves the double-ended suture needle 920a so as to insert the jejunal serosa (muscle) layer at the planned anastomosis site (the periphery of the through-hole B2 a) of the jejunum B2. The person who performs the operation repeats this operation, and as shown in fig. 11, a plurality of double-headed suture needles 920a to 920e are inserted through the healing promoting sheet 110, the pancreatic parenchyma B1, and the jejunal serosa (muscle) layer of the jejunum B2. In this manner, the person performing the operation can fix the healing promoting sheet 110 to the pancreatic parenchyma B1 by using the plurality of double-headed suture needles 920a to 920e for suturing the pancreatic parenchyma B1 and the jejunum B2.

The person performing the operation may suitably separate traction unit 120 from healing promoting sheet 110 after fixing healing promoting sheet 110 to cut surface B1a of pancreatic parenchyma B1. The person who performs the operation pulls the pulling section 120 until the healing promoting sheet 110 is fixed to the cut surface B1a of the pancreatic parenchyma B1, and maintains the state in which the frame 110B of the healing promoting sheet 110 is in close contact with the outer peripheral surface of the pancreatic parenchyma B1, thereby preventing the healing promoting sheet 110 and the pancreatic parenchyma B1 from being dislocated or detached.

The number of double-ended suture needles to be inserted into the serosal (muscular) layer of the jejunum B1 and jejunum B2 and the position to be inserted with the double-ended suture needles are not particularly limited. The person performing the operation may fix the healing promoting sheet 110 to the pancreatic parenchyma B1 by using biodegradable staples or the like as fixing members, instead of the plurality of double-headed suture needles 920a to 920e as fixing members.

Next, as shown in fig. 11, the person performing the operation pulls out the end 912 of the pancreatic duct infusion tube 910 from the pancreatic duct B1B.

Next, as shown in fig. 11, the person performing the operation passes the double-headed suture needle 930 from the lumen side of the pancreatic duct B1B toward the portion on the front wall B1d side of the cross-section B1a of the pancreatic parenchyma B1. The double-ended suture needle 930 is held so as not to hinder the surgical treatment by a grasping tool (not shown) such as forceps in a state where the double-ended suture needle is not inserted into the jejunum B2.

Next, as shown in fig. 11 and 13, the operator moves one end of the double-headed needle 940a from the lumen side of the pancreatic duct B1B toward the cut surface B1a of the pancreatic parenchyma B1. Next, as shown in fig. 12 and 13, the person who performed the operation inserts the other end of the double-headed suture needle 940a into the through-hole B2a of the jejunum B2, and moves the other end of the double-headed suture needle 940a from the inside of the jejunum B2 to the outside of the jejunum B2. As shown in fig. 14, the person performing the operation inserts a plurality of double-headed suture needles 940a to 940e into different portions of the pancreatic duct B1B in the circumferential direction and into the jejunum B2. Further, fig. 13 is a sectional view also schematically showing a part of pancreatic parenchyma B1 and jejunum B2 before anastomosis.

Next, as shown in fig. 14, the operator performs the operation to bring the posterior wall B1c of the pancreatic parenchyma B1 and the pancreatic duct B1B into close contact with the planned anastomosis site of the jejunum B2. Then, of the double-headed suture needles 940a to 940e, the double-headed suture needles 940c to 940e inserted through the back side (the rear wall B1c side) in the circumferential direction of the pancreatic duct B1B are ligated.

Next, as shown in fig. 15, the operator inserts the end 912 of the pancreatic duct infusion tube 910 into the pancreatic duct B1B again. Next, the person performing the operation inserts the needle portion 931, which extends from the inside of the pancreatic duct B1B in the double-headed suture needle 930, into the through hole B2B formed in the jejunum B2, and moves the needle portion 931 from the inside of the jejunum B2 toward the outside of the jejunum B2.

Next, the person performing the operation ligates the double-ended suture needles 930, 940a, 940b (not shown). The number of double-ended suture needles to be inserted through the pancreatic duct B1B and the jejunum B2 and the position where the double-ended suture needles are inserted are not particularly limited.

Next, as shown in fig. 16, the person who performed the operation ligates the double-ended suture needles 920a to 920e with the fingers of the person who performed the operation while pressing the jejunum B2 against the pancreatic parenchyma B1. Thus, the pancreas parenchyma B1 and the jejunum B2 were sutured with the healing promoting sheet 110 sandwiched therebetween. The jejunum B2 is deformed so as to wrap the cut surface B1a of the pancreatic parenchyma B1 and the healing promoting portion 110A of the healing promoting sheet 110 by the tension generated at the time of suturing.

The person who performed the operation retains the healing promoting sheet 110 with the healing promoting portion 110A of the healing promoting sheet 110 sandwiched between the cut surface B1a of the pancreatic parenchyma B1 and the intestinal wall of the jejunum B2. The healing promoting portion 110A of the healing promoting sheet 110 is in contact with the intestinal wall of the section B1a of the pancreatic parenchyma B1 and the jejunum B2, and is interposed between the section B1a of the pancreatic parenchyma B1 and the intestinal wall of the jejunum B2, thereby promoting healing of the living tissue of the pancreatic parenchyma B1 and the living tissue of the intestinal wall of the jejunum B2.

As described above, the medical treatment method of the present embodiment is applied to surgical treatment for joining pancreatic parenchyma B1 and jejunum B2. In addition, in the above medical procedure, the periphery of the cut surface B1a of the cut pancreatic parenchyma B1 and the intestinal wall (jejunal serosa (muscle) layer) of the jejunum B2 were joined. According to this medical procedure, the healing of the living tissue of the pancreatic parenchyma B1 and the living tissue of the intestinal wall of the jejunum B2 can be promoted by the healing promoting portion 110A of the healing promoting sheet 110 interposed between the cut surface B1a of the pancreatic parenchyma B1 and the intestinal wall of the jejunum B2, and the risk of suture failure after the pancreatic parenchyma-jejunostomy can be reduced.

Further, the person performing the operation can appropriately prevent the distortion or the misalignment from occurring in the healing promoting sheet 110 by deforming the frame portion 110B of the healing promoting sheet 110 by the traction portion 120 so as to cover at least a part of the outer peripheral surface of the pancreatic parenchyma B1.

< another modification >

Next, with reference to fig. 17 to 22, a traction unit 620 according to another modification will be described. In the description of the present modification, the description of the contents overlapping the contents already described in the above embodiment is omitted. Note that, what is not particularly described in the description of the modified example can be regarded as the same as that of the above-described embodiment.

Fig. 17 shows a top view of the traction portion 620 in a state before being attached to the healing promoting sheet 110. Fig. 18 to 22 show an example of a procedure of surgical treatment using the medical device 100 provided with the traction unit 620.

As shown in fig. 17, the traction portion 620 includes a belt-shaped main body portion 621 having a predetermined width and length, a plurality of slit portions 623 formed on one end portion 621a side of the main body portion 621 in the longitudinal direction, and a 1 st hole portion 625a and a 2 nd hole portion 625b formed on the other end portion 621b side of the main body portion 621 in the longitudinal direction.

The one end 621a of the main body portion 621 may be formed in a tapered shape that tapers toward the tip end side of the one end 621a, for example. By adopting such a shape, the operation of passing the one end 621a of the main body 621 through the holes 625a and 625b can be easily performed (see fig. 19 and 20).

The 1 st hole 625a is disposed on the side of the one end 621a of the main body 621 with respect to the 2 nd hole 625 b. The 1 st hole portion 625a and the 2 nd hole portion 625b extend in directions orthogonal to each other. The 1 st hole 625a extends substantially parallel to the width direction (the left-right direction in fig. 17) of the main body 621. The 2 nd hole 625b extends substantially parallel to the longitudinal direction (vertical direction in fig. 17) of the main body 621.

The 1 st hole 625a may be formed in a substantially rectangular shape having long sides arranged in the width direction of the body portion 621 in a plan view shown in fig. 17, for example. The 2 nd hole 625b may be formed in a substantially rectangular shape having a long side arranged along the longitudinal direction of the body portion 621 in a plan view shown in fig. 17, for example. The shape, position, size, and the like of each hole 625a and 625b are not particularly limited.

The slit portion 623 extends obliquely with respect to a direction parallel to the longitudinal direction of the main body 621. Specifically, the slit portion 623 is inclined outward from the center of the main body 621. The number and shape of the slit portions 623, the specific position of the main body 621, and the like are not particularly limited.

As shown in fig. 18, a part of the main body 621 constitutes a connection portion 631a connected to the frame portion (2 nd region) 110B of the healing promotion sheet 110. The connecting portion 631a can be slidably connected to the frame portion 110B, for example, as in the connecting portion 121 (see fig. 1B) described in the above-described embodiment. As shown in fig. 18, a part of the body 621 is configured as a non-connecting portion 631B that is not connected to the frame 110B of the healing promotion sheet 110.

As shown in fig. 22, the slit portion 623 and the hole portions 625a and 625B disposed in the non-connecting portion 631B function as an adjusting portion 650 capable of adjusting the amount of deformation of the frame portion 110B of the healing promoting sheet 110.

Next, referring to fig. 18 to 22, an example of a procedure of a surgical operation using the medical device 100 provided with the traction unit 620 is shown. In addition, the steps and the like already described in the above embodiments are appropriately omitted.

As shown in fig. 18, the healing promoting portion 110A of the healing promoting sheet 110 is disposed on a section B1a of the pancreatic parenchyma B1 of the person who performs the operation. The person performing the operation pulls both end portions 621B and 621B of the non-connection portion 631B positioned in the pulling portion 620, thereby deforming the healing promoting sheet 110 and covering a part of the outer peripheral surface of the pancreatic parenchyma B1 with the frame portion 110B of the healing promoting sheet 110.

As shown in fig. 19 and 20, the operator inserts a part of the body 621 on the side of the one end 621a into the holes 625a and 625 b. When the person performing the operation inserts a part of the body section 621 on the side of the one end 621a through the holes 625a and 625b, the person deforms so as to fold back a part of the body section 621 on the side of the other end 621 b. When performing such a task, the operator can use a medical instrument 710 such as forceps, for example. Specifically, as shown in fig. 19, the person performing the operation grips a part of the medical instrument 710 passing through the holes 625a and 625b on the side of the one end 621a of the main body 621, and operates to lift up the medical instrument 710 as shown in fig. 20. By performing such an operation, the operator can easily pass the medical device 710 and a part of the main body 621 on the side of the one end 621a through the holes 625a and 625 b.

As shown in fig. 21, the person performing the operation can hold the healing promoting sheet 110 against the pancreatic parenchyma B1 by pressing the portion of the main body 621 where the holes 625a and 625B are arranged or the peripheral portion thereof with a medical instrument 720 such as forceps and pulling the portion inserted into the holes 625a and 625B in the main body 621.

Even in a state where the person performing the operation releases the traction of the traction unit 620, the slit 623 is maintained in a state of being hooked to the 1 st hole 625a and the 2 nd hole 625 b. Therefore, the holding force of the healing promoting sheet 110 with respect to the pancreatic parenchyma B1 can be appropriately maintained.

In the present modification, the 1 st hole 625a disposed at a position closer to pancreas parenchyma B1 (a position closer to the outer peripheral surface of pancreas parenchyma B1) than the 2 nd hole 625B extends in the width direction of the lead 620 (see fig. 17). As shown in fig. 19 and 22, 1 st hole 625a is arranged along the extending direction of pancreas substantially Ba. Therefore, the person performing the operation can prevent the body 621 of the traction unit 620 from being deformed so that the width of the portion inserted into the 1 st hole 625a is excessively reduced. Therefore, the load on pancreas parenchyma Ba due to the portion inserted into the 1 st hole 625a in the main body 621 of the retractor 620 can be suppressed to be small. On the other hand, the 2 nd hole 625B disposed at a position separated from pancreas parenchyma B1 (a position separated from the outer circumferential surface of pancreas parenchyma B1) from the 1 st hole 625a extends in a direction intersecting the width direction of the lead 620 (see fig. 17). Therefore, the portion inserted into the 2 nd hole 625b in the main body 621 of the pulling portion 620 is deformed so that the width thereof becomes smaller along the shape of the 2 nd hole 625b having a small width. By inserting the body portion 621 having a larger width than the 2 nd hole portion 625b into the 2 nd hole portion 625b having a smaller width, the hook between the inner peripheral portion of the 2 nd hole portion 625b and the body portion 621 becomes strong. Therefore, the holding force of the healing promoting sheet 110 with respect to the pancreatic parenchyma B1 can be effectively improved.

As shown in fig. 22, the operator can wrap the one end 621a side of the body portion 625 inserted through the 1 st hole 625a and the 2 nd hole 625b around the pancreas substantially Ba. Further, the main body 625 may be cut off at the above-described portion.

As described above, according to the medical device 100 having the pulling part 620 of the present modification example, the load on the pancreatic parenchyma Ba can be reduced, and the holding force of the healing promoting sheet 110 with respect to the pancreatic parenchyma Ba can be effectively improved.

The present application is based on japanese patent application No. 2019-65048, filed on 28/3/2019, the disclosure of which is hereby incorporated by reference in its entirety.

Description of the reference numerals

100. 200, 400 and 500 medical instruments,

110. 410, 510 healing promoting tablet,

110A healing promoting part (No. 1 region),

110B, 410B, 510B frame portion (area 2),

112 through the hole,

120. 120A, 120B, 120C, 220A, 220B, 220C, 220D, 220E, 320 traction part,

121. A connection part 221, 321,

123. 223a non-connecting part,

150 an adjusting part,

180 holding member,

411a, 411B, 411c, 511a, 511B, 511c, 511d, B1 pancreas parenchyma,

B2 jejunum.