Suturing aid

Abstract

Provided is a suture aid with which it is possible to reliably suture two blood vessels easily and in a short period of time, regardless of operator skill.　This suture aid (1) is for suturing two blood vessels together with a suture thread, the suture aid (1) being provided with a trunk part (30), a first suture part (10) that can be attached to / detached from the trunk part (30), and a second suture part (20) that can be attached to / detached from the trunk part (30).　The suture aid (1) makes it possible to suture two blood vessels (100, 110) together merely by feeding a single suture thread (200) into a suture thread passage (50), making it possible to reliably suture the two blood vessels (100, 110) easily and in a short period of time regardless of operator skill. The suture aid (1) is provided with a thread removal part (80), making it possible, after suturing the two blood vessels (100, 110) together, to remove the first suture part (10), the second suture part (20), and the trunk part (30) from the blood vessels (100, 110).

Description

Technical Field

[0001] The present invention relates to a suture aid.

Background Art

[0002] Patent Document 1 discloses a vascular anastomosis device for suturing two blood vessels. This vascular anastomosis device for suturing includes a pair of circular tubes, and on the outer surface of each circular tube, a plurality of target clamping protrusions are provided in a staggered manner in the circumferential direction. According to this, each blood vessel is passed through each circular tube and its end is turned inside out, and with the circular tubes being joined together in such a way that the turned ends are aligned, by passing a suture thread alternately through between the respective target clamping protrusions of each circular tube as the turning points of the suture thread, the two blood vessels are sutured at the turned ends.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, according to this vascular anastomosis device for suturing, since the surgeon passes the suture thread through between the respective target clamping protrusions in order, it takes time and effort. In addition, there is a possibility that the surgeon may misthread the suture thread between the respective target clamping protrusions and may not be able to suture the two blood vessels sufficiently. Further, since the ends of the blood vessels are turned inside out and sutured, the sutured portion of the two blood vessels becomes flanged, and the two blood vessels cannot be sutured neatly.

[0005] An object of the present invention is to provide a suture aid that can reliably suture two blood vessels easily and in a short time regardless of the skill level of the surgeon.

Means for Solving the Problems

[0006] The suture assisting device of the present invention is for suturing two blood vessels with a suture, and includes a body portion, a first suture portion detachable from the body portion, and a second suture portion detachable from the body portion. The first suture portion includes one or more first passages which are passages through which the suture can pass. The second suture portion includes one or more second passages which are passages through which the suture can pass. The body portion includes one or more third passages which are passages through which the suture can pass. The first suture portion, the second suture portion or the body portion includes an introduction path which is a passage for introducing the suture and which substantially communicates with the first passage, the second passage or the third passage and the outside. The first suture portion, the second suture portion or the body portion includes a lead-out path which is a passage for leading out the suture and which substantially communicates with the first passage, the second passage or the third passage and the outside. The first passage, the second passage and the third passage include a thread removal portion through which the suture passed through the passage can be removed from the passage to the outside from the side of the passage. The third passage includes those which substantially communicate with two adjacent or neighboring passages among one or more first passages and one or more second passages. The introduction path, the first passage, the second passage, the third passage and the lead-out path are substantially continuous passages through which the suture fed from the introduction path passes through the first passage, the second passage and the third passage and is sent out from the lead-out path, and form a single suture passage extending in a meandering shape or a substantially spiral shape around a predetermined direction.

Effects of the Invention

[0007] According to the suture assisting device of the present invention, since two blood vessels can be sutured only by feeding one suture into the suture passage, two blood vessels can be surely sutured easily and in a short time regardless of the skill of the surgeon.

Brief Description of the Drawings

[0008]

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Embodiments for Carrying Out the Invention

[0009] The suture assisting device 1 is for suturing two blood vessels 100, 110 with a suture 200, and includes a body part 30, a first suture part 10 detachably attached to the body part 30, and a second suture part 20 detachably attached to the body part 30. The first suture part 10 includes one or more first passages 11 which are passages through which the suture 200 can pass. The second suture part 20 includes one or more second passages 21 which are passages through which the suture 200 can pass. The body part 30 includes one or more third passages 31 which are passages through which the suture 200 can pass. The first suture part 10, the second suture part 20 or the body part 30 includes an introduction path 40 which is a passage for introducing the suture 200 and which substantially communicates with the first passage 11, the second passage 21 or the third passage 31 and the outside. The first suture part 10, the second suture part 20 or the body part 30 includes a lead-out path 40 which is a passage for leading out the suture 200 and which substantially communicates with the first passage 11, the second passage 21 or the third passage 31 and the outside. The first passage 11, the second passage 21 and the third passage 31 include a thread removal part 80 which can remove the suture 200 passed through the passage to the outside of the passage from the side of the passage. The third passage 31 includes those which substantially communicate with two adjacent or neighboring passages among one or more first passages 11 and one or more second passages 21. The introduction path 40, the first passage 11, the second passage 21, the third passage 31 and the lead-out path 40 are a substantially continuous passage through which the suture 200 fed in from the introduction path 40 passes through the first passage 11, the second passage 21 and the third passage 31 and is sent out from the lead-out path 40, and form a single suture passage 50 which extends in a meandering (wavy) or substantially spiral shape around a predetermined direction.

[0010] The thread removal part 80 is provided, for example, on the passage side part along the passage direction (longitudinal direction of the passage) of each passage, and is a slit, groove, opening, or the like that connects the passage to the outside. The predetermined direction of rotation is, for example, around the vertical direction (height direction) or the axial direction of the body part 30, and these may be the same as around the circumference (outer circumference, side circumference) of the body part 30. Among the one or more first passages 11 and the one or more second passages 21, two adjacent or neighboring passages include two adjacent or neighboring first passages 11, two adjacent or neighboring second passages 21, and an adjacent or neighboring first passage 11 and second passage 21. The suture passage 50 is, for example, such that the substantially continuous introduction passage 40, first passage 11, second passage 21, third passage 31, and the introduction passage 40 are substantially continuous at the ends in their respective passage directions. Also, the suture passage 50 may have the substantially continuous introduction passage 40, first passage 11, second passage 21, third passage 31, and the introduction passage 40 in contact with each other as long as the suture 200 fed from the introduction passage 40 is sent out from the introduction passage 40, or there may be a gap between them.

[0011] The suture aid 1 can suture two blood vessels 100, 110 by simply feeding one suture 200 into the suture passage 50. Thus, regardless of the skill of the surgeon, the two blood vessels 100, 110 can be reliably sutured easily and in a short time. Also, by providing the thread removal part 80, the suture aid 1 can remove the first suture part 10, the second suture part 20, and the body part 30 from the blood vessels 100, 110 after suturing the two blood vessels 100, 110.

[0012] <First Embodiment> The suture assisting tool 1 of the first embodiment is for suturing two blood vessels 100 and 110 on their side surfaces. The suture assisting tool 1 of the first embodiment includes a body portion 30, a first suture portion 10, and a second suture portion 20. The first suture portion 10 is detachable from the body portion 30. The second suture portion 20 is detachable from the body portion 30 facing the first suture portion 10. The first suture portion 10 includes a plurality of first passages 11 which are passages through which a suture 200 can pass. Also, the second suture portion 20 includes a plurality of second passages 21 which are passages through which the suture 200 can pass. Also, the body portion 30 includes a plurality of third passages 31 which are passages through which the suture 200 can pass. The first passage 11 is provided on the surface of the first suture portion 10 facing the second suture portion 20. Also, the second passage 21 is provided on the surface of the second suture portion 20 facing the first suture portion 10. Also, the third passage 31 substantially communicates with each adjacent first passage 11 and each second passage 21. For example, the third passage 31, each first passage 11, and each second passage 21 substantially communicate at the ends of the passages in the passage direction. The first suture portion 10, the second suture portion 20, or the body portion 30 includes an introduction path 40 which is a passage for introducing the suture 200 and communicates with the first passage 11, the second passage 21, or the third passage 31 and the outside. Also, the first suture portion 10, the second suture portion 20, or the body portion 30 includes a lead-out path 40 which is a passage for leading out the suture 200 and communicates with the first passage 11, the second passage 21, or the third passage 31 and the outside. The first passage 11, the second passage 21, and the third passage 31 are capable of removing the suture 200 passed through the passages from the thread removal portion 80. The introduction path 40, the first passage 11, the second passage 21, the third passage 31, and the lead-out path 40 are a substantially continuous passage through which the suture 200 fed from the introduction path 40 passes through the first passage 11, the second passage 21, and the third passage 31 and is sent out from the lead-out path 40, and form a single suture passage 50 which extends in a meandering (twisted) manner around a predetermined direction.

[0013] The first suture part 10 and the second suture part 20 are attached to the blood vessels 100, 110 by inserting the first passage 11 and the second passage 21 into the blood vessels 100, 110 from openings (cuts) provided on the side surfaces (side circumferential surfaces) of the respective blood vessels 100, 110 toward the openings 102, 112 of the blood vessels 100, 110. The first suture part 10 and the second suture part 20 attached to the blood vessels 100, 110 are oppositely attached to the body part 30. When the suture thread 200 for suturing the blood vessels 100, 110 is inserted and fed from the introduction path 40 in a state where the first suture part 10 and the second suture part 20 are attached to the body part 30, the suture thread 200 is passed through the suture thread passage 50 while meandering in a predetermined direction and stitches around the edges of the openings provided on the side surfaces of the two blood vessels 100, 110, and is sent out from the lead-out path 40. The first passage 11, the second passage 21, and the third passage 31 can remove the suture thread 200 passed through the passage from the thread removal part 80 to the outside of the passage, and the introduction path 40 and the lead-out path 40 can remove the suture thread 200 from the passage by pulling out the suture thread 200 passed through the passage in the passage direction. Therefore, after passing the suture thread 200 through the suture assisting tool 1, the first suture part 10, the second suture part 20, and the body part 30 can be removed from the two blood vessels 100, 110 and the suture thread 200 passed between them.

[0014] The suture assisting tool 1 of the present embodiment can suture the two blood vessels 100, 110 at the openings on their side surfaces only by feeding one suture thread 200 into the suture thread passage 50. Therefore, regardless of the skill of the surgeon, the two blood vessels 100, 110 can be surely sutured on their side surfaces easily and in a short time. Further, since the suture assisting tool 1 is provided with the thread removal part 80, after suturing the two blood vessels 100, 110, the first suture part 10, the second suture part 20, and the body part 30 can be removed from the blood vessels 100, 110.

[0015] The introduction path 40 and the lead-out path 40 may be provided with a thread removal part 80 capable of removing the suture thread 200 passed through the passage from the side of the passage to the outside of the passage.

[0016] According to this, the suture 200 passed through the suture passage 50 (introduction path 40, first passage 11, second passage 21, third passage 31, and lead-out path 40) can be removed more easily and in a shorter time. As a result, after suturing the two blood vessels 100, 110, the first suture portion 10, the second suture portion 20, and the body portion 30 can be removed from the blood vessels 100, 110 in a shorter time.

[0017] Each first passage 11 may be provided at intervals in the circumferential direction of a virtual closed line and may intersect the virtual closed line. Also, each second passage 21 may be provided at intervals in the circumferential direction of a virtual closed line and may intersect the virtual closed line. The virtual closed line is, for example, a line closed in the vertical direction (height direction) or axial direction around the first suture portion 10 and the second suture portion 20, in other words, a line closed in the vertical direction (height direction) or axial direction around the body portion 30. Also, each first passage 11 may have a different extending direction from an adjacent first passage 11. Also, each second passage 21 may have a different extending direction from an adjacent second passage 21. Also, each first passage 11 and each second passage 21 in the vicinity, in other words, each first passage 11 and each second passage 21 adjacent when viewed from the direction in which the first suture portion 10 and the second suture portion 20 face each other, may have different extending directions. Also, when viewed from the direction in which the first suture portion 10 and the second suture portion 20 oppose each other, one of the first passage 11 and the second passage 21 may extend between adjacent others.

[0018] According to this, the two blood vessels 100, 110 can be more reliably sutured at the openings on their side surfaces.

[0019] It is preferable that each first passage 11 has the same angle between its extending direction and the tangent at the intersection with the virtual closed line. Also, it is preferable that each second passage 21 has the same angle between its extending direction and the tangent at the intersection with the virtual closed line. Also, the above angles of each first passage 11 and each second passage 21 may be the same angle.

[0020] According to this, when suturing the blood vessels 100 and 110, the angles of the suture thread 200 with respect to the openings 102 and 112 of the blood vessels 100 and 110 are substantially the same in the circumferential direction of the openings 102 and 112 of the blood vessels 100 and 110. Therefore, the two blood vessels 100 and 110 can be sutured more reliably and neatly at the openings on their sides.

[0021] Also, the virtual closed line may be a circle.

[0022] According to this, the two blood vessels 100 and 110 can be sutured more neatly and reliably at the openings on their sides.

[0023] Each first passage 11 may be point - targeted with respect to a predetermined target point. The predetermined target point is a predetermined point on the surface of the first suture part 10 that faces the second suture part 20, for example, the center of that surface. Also, each first passage 11 may be arranged such that, when viewed from the direction in which the first suture part 10 and the second suture part 20 oppose each other, the ends of the first passage 11 of the first suture part 10 that are reversed overlap the ends of two adjacent first passages 11. Further, the second suture part 20 may be the same as the first suture part 10, and the first suture part 10 and the second suture part 20 may be detachable from the body part 30 with one being reversed with respect to the other so that the target points overlap in the opposing direction.

[0024] According to this, since the first suture part 10 and the second suture part 20 are the same, the manufacturing cost of the suture - assisting tool 1 can be suppressed. Also, the two blood vessels 100 and 110 can be sutured more neatly and reliably at the openings on their sides.

[0025] The body part 30 may include a body 36 and a plurality of arm parts 37 extending from the body 36 in a direction substantially orthogonal to the direction in which the first suture part 10 and the second suture part 20 oppose each other. Also, the third passage 31 may be provided at an arm tip part 37b on the tip side of the arm part 37 and at the arm part 37 or the body 36 on the side opposite to the arm tip part 37b in the direction in which the arm extends.

[0026] According to this, after passing the suture 200 through the suture passage 50, it becomes easier to take out the body portion 30 from between the two blood vessels 100, 110 and the suture 200 passed therethrough.

[0027] The introduction path 40 and the extraction path 40 are preferably provided in the body portion 30, and it is more preferable that one end of these is provided on the front end surface of the arm tip portion 37b.

[0028] According to this, in a state where the suture assisting tool 1 is attached to the two blood vessels 100, 110, the body portion 30 is exposed from the two blood vessels 100, 110, so it becomes easier to put the suture 200 into the introduction path 40 and to take out the suture 200 coming out from the extraction path 40. As a result, it becomes easier to ligate the end portion on the side where the suture 200 enters the introduction path 40 and the end portion on the side where it comes out from the extraction path 40. Further, when one end of the introduction path 40 and the extraction path 40 is provided on the front end surface of the arm tip portion 37b, the entrance of the introduction path 40 and the exit of the extraction path 40 are closer to the outside, so it becomes even more so.

[0029] The introduction path 40 may communicate with one of the first passage 11 and the second passage 21 adjacent to each other. Also, the extraction path 40 may communicate with the other of the first passage 11 and the second passage 21 adjacent to each other. In this case, each third passage 31 substantially communicates with the first passage 11 and the second passage 21 adjacent to each other other than this pair.

[0030] According to this, the suture 200 sent from the introduction path 40 to the suture passage 50 can be more reliably sent out from the extraction path 40.

[0031] The first passage 11, the second passage 21, the third passage 31, the introduction path 40, and the extraction path 40 are preferably grooves.

[0032] According to this, the opening of the groove becomes the thread removal portion 80, and each passage and the thread removal portion 80 can be constructed simply and at low cost.

[0033] It is preferable that the bottoms of the grooves of the first passage 11 and the second passage 21 are curved convexly toward the inner side of the grooves.

[0034] According to this, when passing the suture 200 through the suture passage 50, the suture 200 can be passed through the first passage 11 and the second passage 21 more smoothly.

[0035] Both ends in the longitudinal direction of the grooves and the bottoms of the grooves connecting to both ends of the first passage 11 and the second passage 21 are passage main bodies 12, 22 with a widened groove width, and it is preferable that the third passage 31 communicates approximately at the ends of the passage main bodies 12, 22 of the first passage 11 and the second passage 21.

[0036] According to this, when feeding the suture 200 into the suture passage 50, the suture 200 can be passed through the first passage 11 and the second passage 21 more smoothly.

[0037] The first passage 11 and the second passage 21 are provided with a movement restricting portion 60 that restricts the movement of the suture 200 passed through the passage to the outside of the passage from the thread disengaging portion 80 of the suture 200, and the movement restricting portion 60 may be capable of releasing the restriction on the movement of the suture 200. The release of the restriction of the movement restricting portion 60 may be anything as long as it can release the restriction on the movement of the suture 200, and examples include the removal or cutting of the movement restricting portion 60.

[0038] According to this, since the movement of the suture 200 passed through the first passage 11 and the second passage 21 to the outside (external) of the passage from the thread disengaging portion 80 can be restricted, the detachment of the suture 200 passed through the first passage 11 and the second passage 21 from the passage can be prevented. Further, by releasing the restriction on the movement of the suture 200 by the movement restricting portion 60, the suture 200 passed through the first passage 11 and the second passage 21 can be removed from the sides of the first passage 11 and the second passage 21, in other words, from the thread disengaging portion 80, so that the first suture portion 10 and the second suture portion 20 can be taken out from the two blood vessels 100, 110 and the suture 200 passed through them.

[0039] The movement restricting part 60 is a cuttable linear body, and it is preferably one that crosses the thread removal part 80 or the vicinity of the thread removal part 80 of each of the first passage 11 and the second passage 21. Also, it is preferably one that crosses the vicinity of one end and the vicinity of the other end in the passage direction of each of the first passage 11 and the second passage 21.

[0040] According to this, the movement restricting part 60 can be configured with a simple structure. Also, the sewing thread 200 can be smoothly passed through the first passage 11 and the second passage 21. Also, the restriction of the movement of the sewing thread 200 by the movement restricting part 60 can be easily released.

[0041] The first sewing part 10 and the second sewing part 20 may each include one or more restricting passages 70 that are substantially closed (substantially annular) passages inside. Also, the restricting passage 70 of the first sewing part 10 is provided so as to cross the thread removal part 80 or the vicinity of the thread removal part 80 of each first passage 11, and the restricting passage 70 of the second sewing part 20 may be provided so as to cross the thread removal part 80 or the vicinity of the thread removal part 80 of each second passage 21. The restricting passage 70 is preferably one that crosses the vicinity of one end and the vicinity of the other end in the passage direction of each of the first passage 11 and the second passage 21. The movement restricting part 60 may be endlessly passed through the restricting passage 70 across each first passage 11 or each second passage 21. The restricting passage 70 may be composed of, for example, two substantially closed passages, one passage that crosses the vicinity of one end in the passage direction of each of the first passage 11 and each second passage 21 and the other passage that crosses the vicinity of the other end. Also, the restricting passage 70 may be one substantially closed passage that crosses the vicinity of both ends in the passage direction of each of the first passage 11 and each second passage 21.

[0042] In this case, from one side of the portion of the restricting passage 70 that crosses the first passage 11 or the second passage 21, the movement restricting part 60 (linear body) is fed in, and by connecting the feeding side end of the movement restricting part 60 and the end on the side to be sent out from the other side of the portion crossing the passage, the movement restricting part 60 can be made to cross the first passage 11 or the second passage 21 and be endless within each restricting passage 70.

[0043] According to this, the suture 200 can be smoothly passed through the first passage 11 and the second passage 21. Also, for each of the plurality of first passages 11 and the plurality of second passages 21, the movement restricting portion 60 can be constructed collectively. Further, if the movement restricting portion 60 is cut, the restriction on the movement of the suture 200 can be released collectively. Therefore, the construction and release of the movement restricting portion 60 can be performed easily and in a short time. In addition, if the restricting passages 70 of the first suturing portion 10 and the second suturing portion 20 are made into one substantially closed passage, the construction and release of the movement restricting portion 60 can be performed more easily and in a short time.

[0044] In the direction in which the first suturing portion 10 and the second suturing portion 20 are substantially opposed, the first suturing portion 10, the second suturing portion 20, and the body portion 30 may be provided with through portions 13, 23, 33 penetrating therethrough.

[0045] According to this, when attaching the first suturing portion 10, the second suturing portion 20, and the body portion 30 to the blood vessels 100, 110 or removing them from the blood vessels 100, 110, the through portions 13, 23, 33 can be gripped or hung by a dedicated tool for attachment or removal. Therefore, the attachment of the first suturing portion 10, the second suturing portion 20, and the body portion 30 to the blood vessels 100, 110 and the removal from the blood vessels 100, 110 can be performed more easily and in a short time. Also, according to this, since the volumes of the first suturing portion 10, the second suturing portion 20, and the body portion 30 can be reduced, the manufacturing cost of the suture assisting tool 1 can be reduced.

[0046] In addition, the opposing surfaces of the first suturing portion 10 and the second suturing portion 20 may be, for example, flat surfaces. Also, among the body portion 30, the surfaces opposing the first suturing portion 10 and the second suturing portion 20, that is, the surfaces to which the first suturing portion 10 and the second suturing portion 20 are attached and detached may be flat surfaces. Further, the opposing surfaces of the first suturing portion 10 and the second suturing portion 20 and the surfaces of the body portion 30 opposing the first suturing portion 10 and the second suturing portion 20 may be orthogonal to the direction in which the first suturing portion 10 and the second suturing portion 20 oppose each other.

[0047] <Example of the First Embodiment> As shown in FIGS. 1 and 2, the suture assisting tool 1 of the example of the first embodiment includes a first suture portion 10, a second suture portion 20, and a body portion 30.

[0048] As shown in FIGS. 1 to 3, the first suture portion 10 has a shape like a sphere cut by two parallel planes, and its upper surface is a substantially circular flat surface. The first suture portion 10 is provided with a through portion 13 which is a hole penetrating in the vertical direction (first direction) around its axis. The through portion 13 has a circular cross section and has a shape in which the hole expands curvilinearly downward. On the upper surface of the first suture portion 10, four protruding portions 14 protruding upward are provided around the through portion 13 as a detachable portion for attaching and detaching the first suture portion 10 to and from the body portion 30. Each protruding portion 14 is columnar and is provided at a predetermined pitch, here a 90° pitch, on the circumference of a virtual circle centered on the center of the upper surface of the first suture portion 10 (the axis of the first suture portion 10). For the sake of convenience of explanation, each protruding portion 14 is assumed to be located in front of and behind, and to the left and right of the center of the upper surface of the first suture portion 10.

[0049] As shown in FIGS. 2 and 3, four first passages 11 are provided on the upper surface of the first suture portion 10. Each first passage 11 is a linearly extending groove. Each first passage 11 is provided at equal intervals in the circumferential direction (around the vertical direction) of a virtual circle (a virtual closed line) centered on the center of the upper surface of the first suture portion 10 when viewed from the vertical direction. Also, each first passage 11 is provided so as to intersect the virtual circle. Also, the angle between each first passage 11 and the tangent of the virtual circle at the intersection with the virtual circle is the same. Here, each first passage 11 is inclined with respect to the front-rear direction and the left-right direction. Also, adjacent first passages 11 have directions of extension that are different by 90° around the center of the upper surface of the first suture portion 10 (the axis of the first suture portion 10). Also, each first passage 11 is arranged point-symmetrically with the center of the upper surface of the first suture portion 10 (the axis of the first suture portion 10) as the target point. Note that the virtual circle regarding the first passage 11 is concentric with the virtual circle regarding the protruding portion 14 and has a larger diameter than this.

[0050] As shown in FIGS. 3(C) and 4, each first passage 11 is a groove, and includes a passage main body 12 and a thread removal portion 80. The passage main body 12 is a portion at both ends of the groove and the bottom of the groove connected to both ends, where the groove width is wider than other portions. The passage main body 12 has a substantially circular cross-sectional shape. The passage main body 12 is curved convexly toward the inner side of the groove. The passage main body 12 serves as a passage through which the suture 200 is fed. The thread removal portion 80 is a portion of the groove surrounded by the passage main body 12, connects the side portion of the passage main body 12 to the outside, and has a narrower groove width than the passage main body 12. The thread removal portion 80 can also be regarded as a slit provided on the side portion of the passage main body 12. When suturing the blood vessels 100, 110, the suture 200 is passed through the passage main body 12. The suture 200 passed through each first passage 11 can be removed from the thread removal portion 80, in other words, from the side of the passage main body 12 to the outside of the passage, without going in and out from the end portion in the passage direction of the passage main body 12.

[0051] As shown in FIG. 5, two restriction passages 70 are provided inside the first suture portion 10. One restriction passage 70 is a substantially closed passage (substantially annular passage) that crosses near the outer (outermost) end portion in the passage direction of the passage main body 12 of each first passage 11. The other restriction passage 70 is a substantially closed passage (substantially annular passage) that crosses near the inner (innermost) end portion in the passage direction of the passage main body 12 of each first passage 11. Also, each restriction passage 70 crosses each first passage 11 near the thread removal portion 80, in other words, near the side edge of the passage main body 12. An endless and cuttable linear body, a movement restriction portion 60, is passed through each restriction passage 70. Here, a cuttable fiber thread is used as the movement restriction portion 60. By feeding the movement restriction portion 60 (linear body) from one side of the portion of the restriction passage 70 that crosses the first passage 11 and connecting the feeding side end portion of the movement restriction portion 60 to the end portion sent out from the other side of the portion of the restriction passage 70 that crosses the first passage 11, the movement restriction portion 60 can be made endless within the restriction passage 70.

[0052] When the regulation passage 70 crosses the thread removal portion 80 or the vicinity of the thread removal portion 80 and the movement regulation portion 60 is passed therethrough, the suture 200 can be surely and smoothly passed through the first passage 11 (passage main body 12). Further, by providing the movement regulation portion 60, the suture 200 passed through each first passage 11 cannot move from the thread removal portion 80 to the outside of the passage, so that the suture 200 passed through each first passage 11 during the suturing of the blood vessels 100, 110 can be prevented from coming off from the first passage 11. Further, if each movement regulation portion 60 is cut, the regulation of the suture 200 passed through each first passage 11 is collectively released, and the suture 200 passed through each first passage 11 can be removed from the thread removal portion 80 without passing in and out from the end portion in the passage direction of each first passage 11.

[0053] As shown in FIG. 6, the regulation passage 70 and the movement regulation portion 60 may be such that the regulation passage 70 is a substantially closed passage (substantially annular passage) that crosses the vicinity of both ends in the passage direction of the passage main body 12 of the first passage 11 inside the first suturing portion 10. Further, a endless and cuttable linear body movement regulation portion 60 may be passed through the regulation passage 70. The movement regulation portion 60 is a fiber-made thread as described above. By making the regulation passage 70 and the movement regulation portion 60 in such a manner, the movement regulation portion 60 can be made to cross near both end portions of each first passage 11. According to this example, since there is one regulation passage 70 and one movement regulation portion 60 respectively, the construction of the movement regulation portion 60 in the regulation passage 70 and the release of the regulation of the suture 200 passed through the first passage 11 by the movement regulation portion 60 can be performed more efficiently.

[0054] Note that the movement regulation portion 60 may be any one as long as it regulates the movement of the suture 200 passed through the first passage 11 so that it does not come off from the thread removal portion 80 of the first passage 11 and the regulation can be released. For example, the movement regulation portion 60 may be directly bridged over the first passage 11 near both ends of the first passage 11 without providing the regulation passage 70, or may be a lid detachable from the first passage 11.

[0055] The second stitching portion 20 shown in FIGS. 1, 2, and 7 includes a through portion 23, a protruding portion 24, a second passage 21, a regulating passage 70, and a movement regulating portion 60. The second stitching portion 20 is the same as the first stitching portion 10, and the description thereof is omitted here. The second passage 21 corresponds to the first passage 11. When the second stitching portion 20 is attached to the body portion 30 described later, it corresponds to the first stitching portion 10 inverted around the front-rear direction or the left-right direction. Therefore, FIG. 7(C) showing the bottom surface of the second stitching portion 20 is line-symmetric with respect to FIG. 3(C) showing the upper surface of the first stitching portion 10 in the front-rear direction or the left-right direction.

[0056] As shown in FIGS. 1, 2, and 8, the body portion 30 has flat upper and bottom surfaces, and includes a body 36 and a plurality of arm portions 37. The body 36 is composed of four edges whose outer edges are connected at right angles when viewed in the vertical direction (height direction). Each edge of the outer edge of the body 36 has a shape in which two offset parallel sides are connected. The body 36 is provided with a through portion 33, which is a hole penetrating in the vertical direction around its axis. The through portion 33 of the body 36 has a circular cross-section. Also, the diameter of the through portion 33 of the body 36 is substantially the same as the diameters of these through portions 13, 23 on the upper surface of the first stitching portion 10 and the bottom surface of the second stitching portion 20.

[0057] Four attachment / detachment holes 34, which are holes penetrating in the vertical direction, are provided around the through portion 33 of the body 36 as attachment / detachment portions for attaching and detaching the first stitching portion 10 and the second stitching portion 20 to and from the body portion 30. Each attachment / detachment hole 34 has a circular cross-section, and the protruding portions 14, 24 of the first stitching portion 10 and the second stitching portion 20 are inserted and fitted therein. Also, each attachment / detachment hole 34 is provided at a 90° pitch on the circumference of an imaginary circle centered on the axis of the body 36 so that the protruding portions 14, 24 of the first stitching portion 10 and the second stitching portion 20 can be attached and detached. Each attachment / detachment hole 34 is assumed to be located in front of and behind, and to the left and right of, the axis of the body 36.

[0058] By fitting each protruding portion 14 of the first stitching portion 10 into each attachment / detachment hole 34 from below the body portion 30 and fitting each protruding portion 24 of the second stitching portion 20 into each attachment / detachment hole 34 from above the body portion 30, as shown in FIG. 1, the first stitching portion 10 and the second stitching portion 20 are coaxially mounted on the body portion 30. Each protruding portion 14 of the first stitching portion 10 and each protruding portion 24 of the second stitching portion 20 may be fitted into any attachment / detachment hole 34. In other words, the first stitching portion 10 and the second stitching portion 20 can be attached to the body portion 30 by rotating them by a multiple of 90° with respect to their axes. For the first stitching portion 10 and the second stitching portion 20 mounted on the body portion 30, the surface (upper surface) where the first passage 11 is provided and the surface (bottom surface) where the second passage 21 is provided face each other, and the centers (axes) of these surfaces overlap in the vertical direction. The through portions 13, 23, 33 of the first stitching portion 10, the second stitching portion 20, and the body portion 30 form a continuous hole flush with the surface when the first stitching portion 10 and the second stitching portion 20 are mounted on the body portion 30. The first stitching portion 10 and the second stitching portion 20 can be removed from the body portion 30 by pulling them out, and each protruding portion 14, 24 comes out of each attachment / detachment hole 34.

[0059] Returning to the description of the body portion 30, four arm portions 37 are provided. Each arm portion 37 includes an arm main body 37a and an arm tip portion 37b. Each arm main body 37a extends on an extension line of the side circumferential surface (outer edge) of the body portion 30. The extending directions of adjacent arm main bodies 37a are different by 90°. The arm tip portion 37b is provided at the tip of the arm main body 37a. In a state where the first stitching portion 10 and the second stitching portion 20 are mounted on the body portion 30, a part of the side circumferential surface of each arm main body 37a and the body 36 connected thereto is along one side in the longitudinal direction of each first passage 11 or each second passage 21. Also, the arm tip portion 37b overlaps the outer (outerward) ends of the first passage 11 and the second passage 21, in other words, the outer (outerward) passage main bodies 12, 22. Further, the front end surface of the arm tip portion 37b substantially follows the outer edges of the first stitching portion 10 and the second stitching portion 20 when viewed from the vertical direction.

[0060] As shown in FIGS. 2 and 8, the body portion 30 is provided with a plurality of third passages 31 around the body portion 30 in the vertical direction (around the outer peripheral surface (side peripheral surface)). Each third passage 31 is provided in the arm tip portion 37b and the body 36. The third passages 31 provided in the arm tip portion 37b are provided in three of the four arm tip portions 37b. Also, four third passages 31 are provided around the outer peripheral surface of the body 36. Each third passage 31 is a groove and includes a passage main body 32 and a thread removal portion 80. The passage main body 32 is the portion through which the sewing thread 200 passes. The passage main body 32 penetrates the arm tip portion 37b or the body 36 in the vertical direction. A thread removal portion 80, which is an opening extending along the passage direction (vertical direction) of the passage main body 32, is provided on the side portion of the passage main body 32. The thread removal portion 80 of each third passage 31 provided in the body 36 opens in the direction in which the arm main body 37a extends. The thread removal portions 80 of the third passages 31 provided in the arm tip portion 37b and the body 36 face each other in the direction in which the arm extends, except for a part thereof.

[0061] In a state where the first stitching portion 10 and the second stitching portion 20 are attached to the body portion 30, as shown in FIG. 9, when viewed in plan, each third passage 31 provided in the arm tip portion 37b is provided at a position where the outer (outerward) ends (the ends of the passage main bodies 12, 22) in the respective passage directions of the adjacent (adjacent) first passages 11 and second passages 21 overlap, the upper end of the passage main body 32 is connected to the outer end of the second passage 21, and the lower end of the passage main body 32 is connected to the outer end of the first passage 11. Also, when viewed in plan, each third passage 31 provided in the body 36 is provided at a position where the inner (inward) ends (the ends of the passage main bodies 12, 22) in the respective passage directions of the adjacent (adjacent) first passages 11 and second passages 21 overlap, the upper end of the passage main body 32 is connected to the inner end of the second passage 21, and the lower end of the passage main body 32 is connected to the inner end of the first passage 11.

[0062] As shown in Figures 1, 2 and 8, the arm tip 37b, which does not have the third passage 31, is provided with two inlet and outlet paths 40, which serve as an inlet path 40 for introducing the suture thread 200 and an outlet path 40 for leading out the suture thread 200. Each inlet and outlet path 40 is a groove. One inlet and outlet path 40 extends from the tip surface of the arm tip 37b to the upper surface, and the other extends from the tip surface of the arm tip 37b to the lower surface, and a thread removal section 80, which is an opening extending along the passage direction, is provided on the side of the inlet and outlet path 40. This thread removal section 80 is provided across the tip surface of the arm tip 37b and the upper or lower surface. With the first sewn portion 10 and the second sewn portion 20 attached to the torso portion 30, one inlet / outlet passage 40 has its passage direction end connected to the outer end of the second passage 21 (the end of the passage body 22), and the other inlet / outlet passage 40 has its passage direction end connected to the outer end of the first passage 11 (the end of the passage body 12). Both of the two inlet / outlet passages 40 can be inlet passages 40 and outlet passages 40, and when one is inlet passage 40, the other is outlet passage 40.

[0063] The materials of the first sewn portion 10, the second sewn portion 20 and the body portion 30 and the components thereof are not particularly limited, but may be, for example, a synthetic resin.

[0064] In a state where the first stitching portion 10 and the second stitching portion 20 are attached to the body portion 30, one of the first stitching portion 10 and the second stitching portion 20 corresponds to the other one that is inverted around the front-rear direction or the left-right direction, or further rotated by 90° pitch around the up-down direction. The positional relationship among the first passage 11, the second passage 21, the third passage 31, and the introduction / exit path 40 is as shown in FIG. 9 in a plan view. Hereinafter, this positional relationship will be described based on the plan view. The adjacent first passages 11 have different passage directions (longitudinal directions). Also, each first passage 11 is point-targeted with respect to the center of the upper surface of the first stitching portion 10 (the axis of the first stitching portion 10). Also, the adjacent second passages 21 also have different passage directions (longitudinal directions). Also, each second passage 21 is point-targeted with respect to the center of the bottom surface of the second stitching portion 20 (the axis of the second stitching portion 20). The first passage 11 and the second passage 21 have the other passage extending between one adjacent passage. Also, the nearby (adjacent) first passage 11 and second passage 21 have different extending directions. The outer (outermost) ends (the ends of the passage bodies 12, 22) of each first passage 11 and each second passage 21 overlap, and the inner (innermost) ends (the ends of the passage bodies 12, 22) of each first passage 11 and each second passage 21 overlap. One of the overlapping outer ends (the ends of the passage bodies 12, 22) of each first passage 11 and each second passage 21 has the outer end (the end of the passage body 12) of the first passage 11 leading to one introduction / exit path 40, and the outer end (the end of the passage body 22) of the second passage 21 leading to the other introduction / exit path 40. Also, the remaining of the overlapping outer ends (the passage bodies 12, 22) of each first passage 11 and each second passage 21 are connected via the passage body 32 of the third passage 31 extending in the up-down direction. Also, the overlapping inner ends (the passage bodies 12, 22) of each first passage 11 and each second passage 21 are connected via the passage body 32 of the third passage 31. By connecting the two introduction / exit paths 40, 40 and the adjacent first passage 11 and second passage 21 therebetween via the third passage 31, one introduction / exit path 40 is used as the introduction path 40 (entrance), the other introduction / exit path 40 is used as the exit path 40 (exit), and in the up-down direction around the body portion 30, a single continuous stitching thread passage 50 that extends in a meandering shape (while bending and winding) is formed.

[0065] Next, a method of using the suture aid 1 of the example of the first embodiment will be described. First, as shown in FIG. 10(A), each side surface of the blood vessels 100 and 110 is incised with a scalpel or the like.

[0066] Next, as shown in FIG. 10(B), from the incised portion of one blood vessel 100, the first suture portion 10 is inserted into the blood vessel 100 with the surface (upper surface) provided with the first passage 11 facing rearward, and the first suture portion 10 is attached to the blood vessel 100. When the first suture portion 10 is inserted into the blood vessel 100, the incised portion of the blood vessel 100 is widened to form the opening 102. Further, the first suture portion 10 is arranged in the blood vessel 100 such that each protruding portion 14 is located within the opening 102 of the blood vessel 100 and each first passage 11 crosses the opening 102 of the blood vessel 100. The second suture portion 20 is also attached to the other blood vessel 110 in the same manner as the first suture portion 10.

[0067] Next, as shown in FIG. 10(C), the first suture portion 10 and the second suture portion 20 attached to the blood vessels 100 and 110 are attached to the body portion 30. Thereby, preparations are made for suturing the two blood vessels 100 and 110 at the openings 102 and 112 provided on their respective side surfaces.

[0068] Next, as shown in FIG. 10(C), the suture 200 with the needle 202 attached to its tip is fed into the suture passage 50 from one of the two introduction passages 40, 40. The needle 202 is preferably a flexible linear one for passing the suture 200 through the meandering suture passage 50. Here, as such a needle 202, a wire capable of penetrating the tube walls of the blood vessels 100 and 110 is used. Also, as the suture 200, a thread generally used for suturing the blood vessels 100 and 110 is used. The length of the needle 202 is preferably longer than that of the suture passage 50, and here the length of the needle 202 is such. By making the length of the needle 202 like this, the needle 202 can be smoothly passed through the suture passage 50, and the needle 202 sent out from one introduction passage 40 to the suture passage 50 and the suture 200 attached thereto can be surely taken out from the other introduction passage 40.

[0069] When the suture 200 with the needle 202 is fed from one introduction path 40 into the suture passage 50, as shown in FIG. 11, the suture 200 is alternately passed through each first passage 11 and each second passage 21 via the third passage 31 and sent out from the other introduction path 40. When the suture 200 is passed through the suture passage 50 in this way, the suture 200 is passed inside and outside the blood vessels 100, 110 while meandering around the edges of the openings 102, 112 of the two blood vessels 100, 110. At this time, the suture 200 passed through each first passage 11 and each second passage 21 is prevented from coming out of the thread removal portion 80 to the outside by the movement restricting portion 60.

[0070] After passing the suture 200 through the suture assisting tool 1 as described above, first, the body portion 30 is removed from the blood vessels 100, 110 and the suture 200, and then the first suture portion 10 and the second suture portion 20 are removed.

[0071] To remove the body portion 30, first, the first suture portion 10 and the second suture portion 20 attached to the blood vessels 100, 110 are pulled out and removed from the body portion 30, and the suture 200 is removed from each third passage 31 and each introduction path 40. The suture 200 passed through each third passage 31 and each introduction path 40 can be removed from the thread removal portion 80 (opening of the groove) of each third passage 31 and each introduction path 40. Then, the body portion 30 is removed from between the sutures 200 passed between the two blood vessels 100, 110.

[0072] The removal of the first suture portion 10 and the second suture portion 20 first involves cutting the movement restricting portion 60, removing the movement restricting portion 60 from the restricting passage 70, and releasing the restriction on the suture thread 200 by the movement restricting portion 60. When the restriction on the suture thread 200 by the movement restricting portion 60 is released, the suture threads 200 passed through each of the first passage 11 and the second passage 21 can be removed from the thread removal portion 80 (opening of the groove) of these passages. Next, while removing the suture threads 200 passed through each of the first passage 11 and the second passage 21 from the thread removal portions 80 of these passages, the first suture portion 10 and the second suture portion 20 are removed from between the blood vessels 100, 110 and the suture threads 200 passed between the two blood vessels 100, 110. FIG. 12 shows a state in which the body portion 30, the first suture portion 10, and the second suture portion 20 are removed from the blood vessels 100, 110 and the suture threads 200.

[0073] Next, by pulling both ends of the suture thread 200 from which the needle 202 has been removed to tighten the two blood vessels 100, 110 and ligating the suture thread 200, as shown in FIG. 13, the two blood vessels 100, 110 are sutured in a state where the openings 102, 112 provided on their sides are aligned.

[0074] <Second Embodiment> The suture assisting device 1 of the second embodiment is for suturing two blood vessels 100 and 110 at their ends. The suture assisting device 1 of the second embodiment includes a body portion 30, a first suture portion 10, and a second suture portion 20. The first suture portion 10 is detachable from the outer peripheral surface of the body portion 30. Also, the second suture portion 20 is detachable from the outer peripheral surface of the body portion 30 facing the first suture portion 10. The first passage 11 is a passage through which a suture 200 can pass, and one or more are provided on the surface of the first suture portion 10 facing the outer peripheral surface of the body portion 30. Also, the second passage 21 is a passage through which a suture 200 can pass, and one or more are provided on the surface of the second suture portion 20 facing the outer peripheral surface of the body portion 30. Also, the third passage 31 is a passage through which a suture 200 can pass, and one or more are provided on the outer peripheral surface of the body portion 30. Also, the third passage 31 is a passage through which a suture 200 can pass, and one or more are provided on the outer peripheral surface of the body portion 30, and includes those that substantially communicate with two adjacent passages among one or more first passages 11 and one or more second passages 21. The first suture portion 10, the second suture portion 20, or the body portion 30 is a passage for introducing a suture 200, and is provided with an introduction path 40 that communicates with the first passage 11, the second passage 21, or the third passage 31 and the outside. Also, the first suture portion 10, the second suture portion 20, or the body portion 30 is a passage for leading out a suture 200, and is provided with a lead-out path 40 that communicates with the first passage 11, the second passage 21, or the third passage 31 and the outside. Also, the third passage 31 includes those whose ends (both ends) substantially communicate with the ends of two adjacent passages among one or more first passages 11, one or more of the second passages 21, the introduction path 40, and the lead-out path 40. The first passage 11, the second passage 21, and the third passage 31 are capable of removing the suture 200 passed through the passage from the thread removal portion 80. The introduction path 40, the first passage 11, the second passage 21, the third passage 31, and the lead-out path 40 are a substantially continuous passage through which the suture 200 fed in from the introduction path 40 passes through the first passage 11, the second passage 21, and the third passage 31 and is sent out from the lead-out path 40, and form a single suture passage 50 that extends spirally in a predetermined direction.

[0075] Among the above, among two adjacent passages out of one or more first passages 11 and one or more second passages 21, two adjacent first passages 11, two adjacent second passages 21, and an adjacent first passage 11 and second passage 21 are included.

[0076] The suture assisting tool 1 attaches the body part 30 to each of the blood vessels 100 and 110 by inserting each end side of the body part 30 into the blood vessels 100 and 110 from the ends of the blood vessels 100 and 110. Further, the first suture part 10 and the second suture part 20 are oppositely attached to the outer peripheral surface of the body part 30 attached to the blood vessels 100 and 110. When the suture thread 200 for suturing the blood vessels 100 and 110 is fed from the introduction path 40 with the first suture part 10 and the second suture part 20 attached to the body part 30, the suture thread 200 is spirally passed around the outer periphery (side periphery) of the body part 30 by the suture thread passage 50 and straddles the ends of the two blood vessels 100 and 110 to suture the inside and outside thereof, and is sent out from the lead-out path 40. Further, the first passage 11, the second passage 21, and the third passage 31 can remove the suture thread 200 passed through the passage from the thread removing part 80 to the outside of the passage, and the introduction path 40 and the lead-out path 40 can remove the suture thread 200 from the passage by pulling out the suture thread 200 passed through the passage in the passage direction. Therefore, after passing the suture thread 200 through the two blood vessels 100 and 110, the first suture part 10, the second suture part 20, and the body part 30 can be removed from the two blood vessels 100 and 110 and the suture thread 200 passed between them.

[0077] According to this, since only one suture thread 200 needs to be fed into the suture thread passage 50 to suture the two blood vessels 100 and 110 at their ends, regardless of the skill of the surgeon, the two blood vessels 100 and 110 can be surely sutured at their ends easily and in a short time.

[0078] The first passage 11 and the second passage 21 may be provided at intervals along the circumferential direction of the outer peripheral surface of the body part 30, and the third passage 31 may be provided at intervals along the circumferential direction of the outer peripheral surface of the body part 30.

[0079] According to this, since the ends of the two blood vessels 100 and 110 can be sutured in their circumferential direction by the suture 200, the two blood vessels 100 and 110 can be sutured at these ends more reliably and neatly.

[0080] The first passage 11, the second passage 21, and the third passage 31 may intersect a virtual plane orthogonal to the outer peripheral surface of the body portion 30 at a predetermined position. In this case, the predetermined position may be the center of the body portion 30 (the center in the longitudinal direction of the body portion 30).

[0081] According to this, since the suture 200 can be surely passed through the ends of the two blood vessels 100 and 110, the two blood vessels 100 and 110 can be sutured at these ends more reliably and neatly.

[0082] The first passage 11 and the second passage 21 may be substantially parallel in the extending direction.

[0083] According to this, since the directions in which the suture 200 is passed through the two blood vessels 100 and 110 are aligned, the two blood vessels 100 and 110 can be sutured more neatly.

[0084] The introduction path 40 is a through hole penetrating the first suture portion 10 or the second suture portion 20, and the lead-out path 40 is a through hole penetrating the first suture portion 10 or the second suture portion 20. The third passage 31 may communicate with the introduction path 40 and the adjacent first passage 11 or second passage 21, and the third passage 31 may communicate with the lead-out path 40 and the adjacent first passage 11 or second passage 21. Further, the ends of the introduction path 40 and the lead-out path 40 that communicate with the outside are preferably provided on the surface exposed to the outside of the first suture portion 10 or the second suture portion 20.

[0085] According to this, the suture 200 can be more surely sent from the introduction path 40 into the suture passage 50 and sent out from the introduction path 40, and the suture 200 can be removed from the introduction path 40 and the lead-out path 40. Further, by providing the end portions communicating with the outside of the introduction path 40 and the lead-out path 40 on the outer surface of the first suture portion 10 or the second suture portion 20, it becomes easier to insert and remove the suture 200 into and out of the suture passage 50.

[0086] The introduction path 40 and the lead-out path 40 may include a thread removal portion 80 that can remove the suture 200 passed through the passage to the outside from the side of the passage.

[0087] According to this, the suture 200 passed through the suture passage 50 (introduction path 40, first passage 11, second passage 21, third passage 31, and lead-out path 40) can be removed more easily and in a shorter time.

[0088] One of the first suture portion 10 and the second suture portion 20 may be a replacement of one of the other first passage 11 or the second passage 21 with the introduction path 40 and the lead-out path 40.

[0089] According to this, the manufacturing cost of the suture aid 1 can be suppressed.

[0090] The first passage 11, the second passage 21, and the third passage 31 are preferably grooves.

[0091] According to this, the opening of the groove becomes the thread removal portion 80, and each passage and the thread removal portion 80 can be constructed simply and at low cost.

[0092] In the longitudinal direction of the first passage 11, the second passage 21, and the third passage 31, it is preferable that the bottom of the groove is curved convexly toward the inner side of the groove.

[0093] According to this, when passing the suture 200 through the suture passage 50, the suture 200 can be passed through the first passage 11, the second passage 21, and the third passage 31 more smoothly.

[0094] The first passage 11, the second passage 21, and the third passage 31 are such that both longitudinal ends and the bottom of the groove connecting to both ends have passage main bodies 12, 22, 32 where the groove width widens, and it is preferable that the first passage 11, the second passage 21, and the third passage 31 communicate with each other substantially at the ends of the passage main bodies 12, 22, 32.

[0095] According to this, when feeding the suture 200 into the suture passage 50, the suture 200 can be passed through the first passage 11, the second passage 21, and the third passage 31 even more smoothly.

[0096] The first passage 11, the second passage 21, and the third passage 31 are provided with a movement restricting portion 60 that restricts the movement of the suture 200 from the thread detachment portion 80 of the suture 200 passed through the passage to the outside of the passage, and the movement restricting portion 60 may be capable of releasing the restriction on the movement of the suture 200. The release of the restriction by the movement restricting portion 60 may be anything as long as it can release the restriction on the movement of the suture 200, and examples include removal or cutting of the movement restricting portion 60.

[0097] According to this, since the movement of the suture 200 from the thread detachment portion 80 of the suture 200 passed through the first passage 11, the second passage 21, and the third passage 31 to the outside (external) of the passage is restricted, the detachment of the suture 200 passed through the first passage 11, the second passage 21, and the third passage 31 from the passage is prevented, and the suture 200 can be passed through the first passage 11, the second passage 21, and the third passage 31 more reliably and smoothly. Further, by releasing the restriction on the movement of the suture 200 by the movement restricting portion 60, the suture 200 passed through the first passage 11, the second passage 21, and the third passage 31 can be removed from the side of each passage, in other words, from the thread detachment portion 80 of each passage, so that the first suture portion 10, the second suture portion 20, and the body portion 30 can be taken out from the two blood vessels 100, 110 and the suture 200 passed through them.

[0098] The movement restricting part 60 is a cuttable linear body, and preferably crosses the first passage 11, the second passage 21, and the thread removal part 80 or the vicinity of the thread removal part 80 of the third passage 31. Further, the position where the movement restricting part 60 crosses the first passage 11, the second passage 21, and the third passage 31 is preferably near the end (opening) in the passage direction of each passage.

[0099] According to this, the movement restricting part 60 can be configured with a simple structure. Further, the sewing thread 200 can be smoothly passed through the first passage 11 and the second passage 21. Also, the restriction of the movement of the sewing thread 200 by the movement restricting part 60 can be easily released.

[0100] The first sewing part 10, the second sewing part 20, and the body part 30 may each include one or more restricted passages 70 that are substantially closed (substantially annular) passages inside. Further, the restricted passage 70 of the first sewing part 10 is provided so as to cross the thread removal part 80 or the vicinity of the thread removal part 80 of each first passage 11, the restricted passage 70 of the second sewing part 20 is provided so as to cross the thread removal part 80 or the vicinity of the thread removal part 80 of each second passage 21, and the restricted passage 70 of the body part 30 may be provided so as to cross the thread removal part 80 or the vicinity of the thread removal part 80 of each third passage 31. The restricted passage 70 preferably crosses near one end and the other end in the passage direction of the first passage 11, the second passage 21, and the third passage 31. The restricted passage 70 may cross one of the first passage 11, the second passage 21, and the third passage 31, or may cross a plurality of the first passage 11, the second passage 21, and the third passage 31. Further, the movement restricting part 60 may be endlessly passed through each restricted passage 70 across the first passage 11, the second passage 21, or the third passage 31.

[0101] In this case, the movement restricting part 60 (linear body) is fed in from one side of the part of the restricting passage 70 that crosses the first stitching part 10, the second stitching part 20, and the body part 30. By connecting the end part on the feeding side of the movement restricting part 60 and the end part on the side to be sent out from the other side of the part crossing the passage, the movement restricting part 60 can be made endless within each restricting passage 70 by crossing the first stitching part 10, the second stitching part 20, or the body part 30.

[0102] According to this, the sewing thread 200 can be smoothly passed through the first passage 11, the second passage 21, and the third passage 31. Also, for each of the first passage 11, the second passage 21, and the third passage 31, the movement restricting part 60 can be constructed collectively. Moreover, if the movement restricting part 60 is cut, the restriction of the movement of the sewing thread 200 can be released collectively. Therefore, the construction and release of the movement restricting part 60 can be performed easily and in a short time. Further, if the restricting passage 70 is made into one substantially closed passage that crosses both ends in the passage direction of all the passages for each of the first passage 11, the second passage 21, or the third passage 31, the movement of the sewing thread 200 in that passage can be restricted collectively by one movement restricting part 60 for each of the first passage 11, the second passage 21, and the third passage 31. Moreover, if the movement restricting part 60 is cut, the restriction of the sewing thread 200 in that passage can be released collectively. Therefore, the construction and release of the movement restricting part 60 can be performed even more easily and in a short time.

[0103] The body part 30 may be provided with a through portion 33 that penetrates the body part 30 in a direction substantially parallel to the outer peripheral surface of the body part 30.

[0104] According to this, the volume of the body part 30 can be reduced, so the manufacturing cost of the suture aid 1 can be reduced.

[0105] The inner peripheral surfaces of the first stitching part 10 and the second stitching part 20 may have a shape that fits (follows) the outer peripheral surface of the body part 30. Also, the outer peripheral surface of the body part 30 may have a substantially circular cross section.

[0106] <Examples of the Second Embodiment> As shown in FIGS. 14 and 15, the suture assisting tool 1 of the example of the second embodiment includes a body portion 30, a first suture portion 10, and a second suture portion 20.

[0107] As shown in FIGS. 14 to 16, the body portion 30 is cylindrical, and its interior is a through portion 33 that penetrates in the vertical direction. The through portion 33 has a circular cross-section and is shaped such that the hole gradually narrows toward the center in the vertical direction.

[0108] On the outer peripheral surface (side peripheral surface) of the body portion 30, four protruding portions 35 protruding from the outer peripheral surface are provided as detachable portions for attaching and detaching the first suture portion 10 and the second suture portion 20. Each protruding portion 35 is substantially cylindrical and is provided on the outer peripheral surface of the body portion 30 at a 90° pitch around the outer periphery of the body portion 30, that is, in the front, rear, left, and right of the center of the body portion 30.

[0109] As shown in FIGS. 14, 15, and 17, the first suture portion 10 is semi-cylindrical and has substantially the same height as the body portion 30. The outer peripheral surface of the first suture portion 10 is curved so as to bulge outward in the vertical direction. Also, the inner peripheral surface of the first suture portion 10 is curved so as to fit (along) the outer peripheral surface of the body portion 30. On the inner peripheral surface of the first suture portion 10, a detachable hole 15, which is a hole into which the protruding portion 35 of the body portion 30 is fitted, is provided as a detachable portion for attaching and detaching the first suture portion 10 to and from the body portion 30. Also, at both ends in the circumferential direction of the first suture portion 10, concave portions 16 into which half of the longitudinal length of the protruding portion 35 of the body portion 30 is fitted are provided as detachable portions.

[0110] As shown in FIGS. 15 and 17, two first passages 11 are provided on the inner peripheral surface of the first suture portion 10 at intervals in the circumferential direction of the inner peripheral surface. Each first passage 11 is a groove and extends substantially parallel to each other. Further, each first passage 11 is inclined at the same angle with respect to the circumferential direction and the vertical direction of the inner peripheral surface of the first suture portion 10, respectively. Each first passage 11 includes a passage main body 12 and a thread removal portion 80, similar to the example of the first embodiment. Similar to the example of the first embodiment, the passage main body 12 is a portion at both ends of the groove and the bottom of the groove connecting to both ends, where the groove width is wider than other portions. The passage main body 12 has a substantially circular cross-sectional shape. The passage main body 12 is curved convexly toward the back side of the groove. The passage main body 12 serves as a passage through which the suture thread 200 is fed. The thread removal portion 80 is a portion of the groove surrounded by the passage main body 12, connects the side portion of the passage main body 12 to the outside, and the groove width is narrower than that of the passage main body 12. The thread removal portion 80 can also be regarded as a slit provided on the side portion of the passage main body 12. When suturing the blood vessels 100 and 110, the suture thread 200 is passed through the passage main body 12. The suture thread 200 passed through each first passage 11 can be removed from the thread removal portion 80, in other words, from the side of the passage main body 12 to the outside of the passage, without going in and out from the end portion in the passage direction of the passage main body 12.

[0111] Inside the first suture portion 10, as shown in FIGS. 17(E) and 19(A), a regulation passage 70, which is a substantially closed passage (substantially annular passage) crossing near both ends of the passage main body 12 of each first passage 11, is provided. The regulation passage 70 crosses each first passage 11 near the thread removal portion 80, in other words, near the side edge of the passage main body 12. A movement regulation portion 60, which is an endless and cuttable linear body, is passed through the regulation passage 70. Here, a cuttable fiber thread is used as the movement regulation portion 60. By feeding the movement regulation portion 60 (linear body) from one side of the portion of the regulation passage 70 crossing the first passage 11 and connecting the feeding side end of the movement regulation portion 60 and the end portion sent out from the other side of the portion of the regulation passage 70 crossing the first passage 11, the movement regulation portion 60 can be made endless in the regulation passage 70.

[0112] When the regulation passage 70 crosses the thread removal portion 80 or near the thread removal portion 80 and the movement regulation portion 60 is passed through the first passage 11, the suture 200 can be surely and smoothly passed through the first passage 11 (passage main body 12). Further, by providing the movement regulation portion 60, the suture 200 passed through each first passage 11 cannot move from the thread removal portion 80 to the outside of the passage. Therefore, during the suturing of the blood vessels 100, 110, the suture 200 passed through each first passage 11 can be regulated so as not to come off from the first passage 11. Further, if each movement regulation portion 60 is cut, the regulation of the suture 200 passed through each first passage 11 is collectively released, and the suture 200 passed through each first passage 11 can be removed from the thread removal portion 80 without pulling it out from the end portion of each first passage 11 in the passage direction.

[0113] The second suture portion 20 shown in FIGS. 15 and 18 includes a detachable hole 25, a concave portion 26, a second passage 21 having a passage main body 22, a regulation passage 70, and a movement regulation portion 60. The second suture portion 20 is the same as the first suture portion 10 except that one of the two first passages 11 is replaced by the introduction / exit passage 40 through which the suture 200 enters and exits, and the number of passages crossed by the regulation passage 70 is different. The second passage 21 is one and corresponds to the other of the two first passages 11.

[0114] The introduction / exit passage 40 of the second suture portion 20 is provided by replacing one of the two first passages 11 as compared with the first suture portion 10. Two introduction / exit passages 40 are provided. Each introduction / exit passage 40 is a hole penetrating from the outer peripheral surface to the inner peripheral surface of the second suture portion 20. Explaining the introduction / exit passage 40 of the second suture portion 20 by the first suture portion 10, the end portion on the inner peripheral surface side of one introduction / exit passage 40 is provided at a position where one end portion of the passage main body 12 of the first passage 11 replaced by the introduction / exit passage 40 is located, and the end portion on the inner peripheral surface side of the other introduction / exit passage 40 is provided at a position where the other end portion of the other passage main body 12 of the first passage 11 replaced by the introduction / exit passage 40 is located. Both of the two introduction / exit passages 40 can be used as the introduction passage 40 and the exit passage 40. When one is used as the introduction passage 40, the other becomes the exit passage 40.

[0115] Inside the second stitching portion 20, as shown in Fig. 19(B), a restricting passage 70, which is a substantially closed passage (substantially annular passage) crossing the vicinity of both ends of the passage body 22 of each second passage 21, is provided. The restricting passage 70 crosses each second passage 21 near the thread removal portion 80, in other words, near the side edge of the passage body 22. A movement restricting portion 60 of an endless and cuttable linear body is passed through the restricting passage 70. The restricting passage 70 and the movement restricting portion 60 of the second stitching portion 20 are basically the same as those of the first stitching portion 10.

[0116] The first stitching portion 10 is attached to the body portion 30 by inserting the protruding portion 35 of the body portion 30 into the attachment / detachment hole 15 and inserting the longitudinal half of the protruding portion 35 adjacent to the protruding portion 35 into each recess 16, and aligning (along) the inner peripheral surface with the outer peripheral surface of the body portion 30. The second stitching portion 20 is attached to the body portion 30 in the same manner as the first stitching portion 10, facing the first stitching portion 10 on the opposite side of the first stitching portion 10. The attachment / detachment holes 15, 25 and the respective recesses 16, 26 of the first stitching portion 10 and the second stitching portion 20 can be attached to any protruding portion 35. In other words, the first stitching portion 10 and the second stitching portion 20 can be attached to the front and back as well as the left and right of the body portion 30. As shown in Fig. 14, in the state where the first stitching portion 10 and the second stitching portion 20 are attached to the body portion 30, the outer peripheral surface of the body portion 30 is covered by the first stitching portion 10 and the second stitching portion 20. Also, as shown in Fig. 20(A), the first passage 11, the second passage 21, and the introduction / discharge passage 40 are provided at equal intervals in the circumferential direction of the inner peripheral surfaces (outer peripheral surface of the body portion 30) of the first stitching portion 10 and the second stitching portion 20. Note that Fig. 20(A) is a view obtained by developing the inner peripheral surfaces of the first stitching portion 10 and the second stitching portion 20, which are seen in perspective from the outside in the horizontal direction toward the center side of the body portion 30, onto a plane, and thus is inverted with respect to Fig. 19. When the first stitching portion 10 and the second stitching portion 20 are pulled out from the body portion 30, the attachment / detachment holes 15, 25 and the respective recesses 16, 26 are disengaged from the protruding portion 35, and the body portion 30 is removed.

[0117] Returning to the description of the body portion 30, as shown in FIGS. 15 and 16, four third passages 31 are provided at equal intervals in the circumferential direction (lateral circumferential direction) on the outer peripheral surface (lateral peripheral surface) of the body portion 30. Each third passage 31 is a groove and includes a passage main body 32 and a thread removal portion 80. The passage main body 32 is a portion at both ends of the groove and the bottom of the groove connecting to both ends, where the groove width is wider than other portions. The passage main body 32 has a substantially circular cross-sectional shape. The passage main body 32 is curved convexly toward the back side of the groove. The passage main body 32 serves as a passage through which the suture thread 200 is fed. The thread removal portion 80 is a portion of the groove surrounded by the passage main body 32, connects the side portion of the passage main body 32 to the outside, and has a narrower groove width than the passage main body 32. When suturing the blood vessels 100, 110, the suture thread 200 is passed through the passage main body 32. The suture thread 200 passed through each third passage 31 can be removed from the thread removal portion 80, in other words, from the side of the passage main body 32 to the outside of the passage, without going in and out from the end in the passage direction of the passage main body 32.

[0118] In a state where the first suture portion 10 and the second suture portion 20 are attached to the body portion 30, as shown in FIG. 20, each third passage 31 extends so as to connect two adjacent ones of the first passage 11, the second passage 21, and the introduction / exit path 40. These two adjacent ones include adjacent first passages 11, and when there are a plurality of second passages 21, adjacent second passages 21 are also included, but adjacent two introduction / exit paths 40 are not included. Each third passage 31 extends at a substantially same angle with respect to the circumferential direction and the vertical direction of the outer peripheral surface of the body portion 30. When viewed in the horizontal direction, the upper end of the passage main body 32 of each third passage 31 communicates with the upper end of the passage main bodies 12, 22 of each first passage 11 and each second passage 21 or the end of the upper introduction / exit path 40, and the lower end of the passage main body 32 communicates with the lower end of the passage main bodies 12, 22 of each first passage 11 and each second passage 21 or the end of the lower introduction / exit path 40.

[0119] Inside the body 30, as shown in Fig. 21, there is provided a restriction passage 70 which is a substantially closed passage (substantially annular passage) that crosses near both ends of the passage body 32 of all the third passages 31. The restriction passage 70 of the third stitching portion is basically the same as that of the first stitching portion 10. A movement restriction portion 60 of an endless and cuttable linear body is passed through the restriction passage 70. The movement restriction portion 60 is a fiber thread here, and by passing the thread through the restriction passage 70 and tying its both ends, it is passed through the restriction passage 70 and is endless.

[0120] Regarding the movement restriction portion 60 and the restriction passage 70 of the first stitching portion 10, the second stitching portion 20, and the body 30, it is also possible to separately provide a continuous substantially closed restriction passage 70 that crosses only one end side of the passage bodies 12, 22, 32 of the first passage 11, the second passage 21, and the third passage 31 and a continuous substantially closed restriction passage 70 that crosses only the other end side, and an endless movement restriction portion 60 is passed through each restriction passage 70. Further, the movement restriction portion 60 may be spanned across the first passage 11, the second passage 21, and the third passage 31 near both ends thereof so as to cross them without providing the restriction passage 70, or may be a detachable lid for the openings of these passages.

[0121] Each first passage 11, each second passage 21, and each third passage 31 have their centers overlapping and intersecting with respect to a virtual plane orthogonal to the outer peripheral surface of the body 30 at a predetermined position. The virtual plane orthogonal to the outer peripheral surface of the body 30 at the predetermined position is, here, the horizontal plane at the center of the body 30.

[0122] In a state where the first stitching portion 10 and the second stitching portion 20 are attached to the body 30, the first passage 11, the second passage 21, the third passage 31, and the introduction / exit passage 40 form a single stitching thread passage 50 which is a substantially continuous passage that spirally extends in the circumferential direction around the vertical direction of the body 30 (the circumferential direction of the outer peripheral surface (side circumferential surface)), with one introduction / exit passage 40 as the introduction passage 40 (entrance) and the other introduction / exit passage 40 as the exit passage 40 (exit).

[0123] The above-described first suture portion 10, second suture portion 20, and body portion 30, as well as the materials of the configurations provided therein, are not particularly limited, but can be, for example, synthetic resins.

[0124] Next, a method of using the suture aid 1 of the second embodiment will be described. First, as shown in FIG. 22(A), one end side of the body portion 30 is inserted into one end of one blood vessel 100 and into its interior, and the other end side of the body portion 30 is inserted into one end of the other blood vessel 110 and into its interior, and the body portion 30 is attached to the two blood vessels 100, 110. Next, as shown in FIG. 22(B), the first suture portion 10 and the second suture portion 20 are attached to the body portion 30. Thereby, preparations are made to suture the two blood vessels 100, 110 at their ends. In a state where the first suture portion 10 and the second suture portion 20 are attached to the body portion 30, the ends of the respective blood vessels 100, 110 are located between the body portion 30 and the first suture portion 10 and the second suture portion 20. Next, as shown in FIG. 22(C), the suture thread 200 with the needle 202 attached to its tip is fed into the suture thread passage 50 from one of the introduction passages 40. The needle 202 and the suture thread 200 are the same as those in the example of the first embodiment.

[0125] When the suture thread 200 is fed into the suture thread passage 50 from one of the introduction passages 40, the suture thread 200 is alternately passed through the first passage 11 or the second passage 21 and the third passage 31 communicating therewith, and is sent out to the outside from the other of the introduction passages 40, as shown in FIG. 23. When the suture thread 200 is passed through the suture thread passage 50 in this way, as shown in FIG. 24, the suture thread 200 is spirally passed inside and outside each of the two blood vessels 100, 110 around the ends of the two blood vessels 100, 110. At this time, the suture thread 200 passed through each of the first passages 11 and each of the second passages 21 is prevented from coming out to the outside from the thread removal portion 80 by the movement restricting portion 60.

[0126] After passing the suture thread 200 through the suture aid 1, the suture aid 1 is removed from the blood vessels 100, 110 and the suture thread 200. To remove the suture aid 1, first, the first suture portion 10 and the second suture portion 20 are removed, and then the body portion 30 is removed.

[0127] The removal of the first suture portion 10 and the second suture portion 20 is as follows: First, the movement restricting portion 60 is cut, and the movement restricting portion 60 is removed from the restricting passage 70 to release the restriction of the suture thread 200 by the movement restricting portion 60. When the restriction of the suture thread 200 by the movement restricting portion 60 is released, the suture threads 200 passed through the respective first passages 11 and second passages 21 can be removed from the thread removal portions 80 (groove openings) of these passages. Next, the suture threads 200 passed through the respective first passages 11 and second passages 21 are removed from the thread removal portions 80 of these passages, and the first suture portion 10 and the second suture portion 20 are removed from the body portion 30. The suture threads 200 passed through the respective lead-in / lead-out passages 40 of the second suture portion 20 can be removed from the respective lead-in / lead-out passages 40 by pulling out the second suture portion 20 along the suture threads 200. FIG. 24(A) shows a state where the first suture portion 10 and the second suture portion 20 are removed from the body portion 30.

[0128] The removal of the body portion 30 from the blood vessels 100, 110 is the same as the removal of the first suture portion 10 and the second suture portion 20. First, the movement restricting portion 60 is cut, and the movement restricting portion 60 is removed from the restricting passage 70 to release the restriction of the suture thread 200 by the movement restricting portion 60. When the restriction of the suture thread 200 by the movement restricting portion 60 is released, the suture threads 200 passed through the respective third passages 31 can be removed from the thread removal portions 80 of these passages. Next, the suture threads 200 passed through the respective third passages 31 are removed from the thread removal portions 80, and the body portion 30 is pulled out from the respective blood vessels 100, 110 and taken out from between the suture threads 200 passed through the two blood vessels 100, 110. FIG. 24(B) shows a state where the body portion 30 is removed from the blood vessels 100, 110.

[0129] Next, by pulling both ends of the suture thread 200 from which the needle 202 has been removed to tighten the two blood vessels 100, 110 and ligating the suture thread 200, as shown in FIG. 24(C), the two blood vessels 100, 110 are sutured in a state where their ends are joined together.

[0130] The present invention is not limited to the above-described embodiments and examples, and can be appropriately modified within the scope of the invention described in the claims and the scope of the invention equivalent thereto.

Explanation of Symbols

[0131] 1 Suturing Aid 10 First Suture Portion 11 First Passageway 12 Passageway Body 13 Penetrating Portion 14 Protruding Portion 15 Detachable Hole 16 Concave Portion 20 Second Suture Portion 21 Second Passageway 22 Passageway Body 23 Penetrating Portion 24 Protruding Portion 25 Detachable Hole 26 Concave Portion 30 Trunk Portion 31 Third Passageway 32 Passageway Body 33 Penetrating Portion 34 Detachable Hole 35 Protruding Portion 36 Trunk 37 Arm Portion 37a Arm Body 37b Arm Tip 40 Introduction / Outlet Passageway (Introduction Passageway, Outlet Passageway) 50 Suture Thread Passageway 60 Movement Restriction Portion 70 Restriction Passageway 80 Thread Removal Portion 100, 110 Blood Vessels 102, 112 Openings 200 Suture Thread 202 Needle

Claims

1. A suturing aid for suturing two blood vessels with a suture, comprising: a body portion; a first suturing portion detachable from the body portion; a second suturing portion detachable from the body portion; The first suturing portion includes one or more first passages which are passages through which the suture can pass; The second suturing portion includes one or more second passages which are passages through which the suture can pass; The body portion includes one or more third passages which are passages through which the suture can pass; The first suturing portion, the second suturing portion or the body portion includes an introduction passage which is a passage for introducing the suture and which substantially communicates between the first passage, the second passage or the third passage and the outside; The first suturing portion, the second suturing portion or the body portion includes a lead-out passage which is a passage for leading out the suture and which substantially communicates between the first passage, the second passage or the third passage and the outside; The first passage, the second passage and the third passage include a thread-removing portion through which the suture passed through the passage can be removed from the side of the passage to the outside of the passage; The third passage includes those which substantially communicate with two adjacent or neighboring passages among one or more of the first passages and one or more of the second passages; The introduction passage, the first passage, the second passage, the third passage and the lead-out passage are a substantially continuous passage through which the suture fed in from the introduction passage passes through the first passage, the second passage and the third passage and is sent out from the lead-out passage, and form a single suturing thread passage extending in a meandering shape or a substantially spiral shape around a predetermined direction. A suturing aid.

2. A suturing aid for suturing the two blood vessels on their sides, comprising: The second suturing portion is detachable from the body portion opposite to the first suturing portion; The first passage, the second passage and the third passage are each provided in plurality; The first passage is provided on the surface of the first suturing portion facing the second suturing portion; The second passage is provided on the surface of the second suturing portion facing the first suturing portion; The third passage substantially communicates with each adjacent first passage and each second passage; The suturing thread passage extends in a meandering shape. The suturing aid according to Claim 1.

3. The suturing aid according to Claim 2, wherein the introduction passage and the lead-out passage include a thread-removing portion through which the suture passed through the passage can be removed from the side of the passage to the outside.

4. ​ Each of the first passages and each of the second passages are provided at intervals in the circumferential direction of a virtual closed line, and the suture assisting device according to claim 2 or 3 that intersects the virtual closed line.

5. The introduction path and the lead-out path are provided in the body portion, and the suture assisting device according to claim 2 or 3.

6. The first passage, the second passage, the third passage, the introduction path, and the lead-out path are grooves, and the suture assisting device according to claim 2 or 3.

7. The first passage and the second passage include a movement restricting portion that restricts the movement of the suture thread from the outside-of-thread portion of the suture thread passed through the passage to the outside of the passage. The movement restricting portion is a suture assisting device according to claim 2 or 3 that can release the restriction of the movement of the suture thread.

8. The movement restricting portion is a cuttable linear body that crosses the outside-of-thread portion or the vicinity of the outside-of-thread portion of the first passage and the second passage, and the suture assisting device according to claim 7.

9. The first suture portion and the second suture portion each include one or more restricting passages that are substantially closed passages inside. The restricting passage of the first suture portion is provided so as to cross the outside-of-thread portion or the vicinity of the outside-of-thread portion of each first passage. The restricting passage of the second suture portion is provided so as to cross the outside-of-thread portion or the vicinity of the outside-of-thread portion of each second passage. The movement restricting portion is a suture assisting device according to claim 8 that is endlessly passed through the restricting passage across each of the first passages or each of the second passages.

10. A suture assisting device for suturing two of the blood vessels at their ends, The first suture portion is detachable from the outer peripheral surface of the body portion. The second suture portion is detachable from the outer peripheral surface of the body portion facing the first suture portion. The first passage is provided with one or more on the surface of the first suture portion facing the outer peripheral surface of the body portion. The second passage is provided with one or more on the surface of the second suture portion facing the outer peripheral surface of the body portion. The third passage is provided with one or more on the outer peripheral surface of the body portion, and includes those that substantially communicate with two adjacent passages among one or more of the first passages and one or more of the second passages. The suture thread passage extends spirally, and the suture assisting device according to claim 1.

11. The first passage and the second passage are provided at intervals along the circumferential direction of the outer peripheral surface of the body portion, and the suture assisting device according to claim 10.

12. The introduction path is a through hole penetrating the first suture portion or the second suture portion, The outlet path is a through hole penetrating the first suture portion or the second suture portion, The third path communicates with the introduction path and the adjacent first path or second path, The suture assisting tool according to claim 10 or 11, wherein the third path communicates with the outlet path and the adjacent first path or second path.

13. The suture assisting tool according to claim 10 or 11, wherein the first path, the second path, and the third path are grooves.

14. The first path, the second path, and the third path are provided with a movement restricting portion that restricts the movement of the suture outside the thread from the outside of the thread portion in the path to the outside of the path, The suture assisting tool according to claim 10 or 11, wherein the movement restricting portion can release the restriction of the movement of the suture.

15. The movement restricting portion is a cuttable linear body that crosses the outside of the thread portion or near the outside of the thread portion of the first path, the second path, and the third path. The suture assisting tool according to claim 14.

16. The first suture portion, the second suture portion, and the body portion each include one or more restricting paths that are substantially closed paths inside, The restricting path of the first suture portion is provided so as to cross the outside of the thread portion or near the outside of the thread portion of the first path, The restricting path of the second suture portion is provided so as to cross the outside of the thread portion or near the outside of the thread portion of the second path, The restricting path of the body portion is provided so as to cross the outside of the thread portion or near the outside of the thread portion of the third path, The suture assisting tool according to claim 15, wherein the movement restricting portion is endlessly passed through the restricting path across each of the first path, each of the second path, or each of the third path.

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