JP5544597B2 - Tubular tissue anastomosis instrument - Google Patents

Tubular tissue anastomosis instrument Download PDF

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JP5544597B2
JP5544597B2 JP2009270154A JP2009270154A JP5544597B2 JP 5544597 B2 JP5544597 B2 JP 5544597B2 JP 2009270154 A JP2009270154 A JP 2009270154A JP 2009270154 A JP2009270154 A JP 2009270154A JP 5544597 B2 JP5544597 B2 JP 5544597B2
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anastomosis
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tubular tissue
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members
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JP2011110262A (en
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和夫 高久田
智和 向井
景基 狩生
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Kawasumi Laboratories Inc
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Description

本発明は、例えば、血管、消化管、胆管、尿管、尿道等の生体の管状組織を吻合するために用いる管状組織吻合器具に関する。   The present invention relates to a tubular tissue anastomosis instrument used for anastomosing biological tubular tissues such as blood vessels, digestive tracts, bile ducts, ureters, and urethra.

血管を吻合するための血管吻合器具として、従来、中央に血管を通すための孔が設けられた2つの管状の吻合部材と、当該2つの吻合部材を向き合わせた状態で締め合わせる締結手段とを備える血管吻合器具が知られている(例えば、特許文献1参照。)。各吻合部材の端部には、血管端部を外側に向けて折り返すための引っ掛け部が設けられている。
従来の血管吻合器具は、吻合部材の孔に血管を通して引っ掛け部に血管端部を引っ掛けた状態で、血管端部の内面同士が合わさるように2つの吻合部材を向かい合わせて、さらに締結手段で締め合わせることにより、血管を吻合するものである。
As a blood vessel anastomosis instrument for anastomosing blood vessels, conventionally, there are two tubular anastomosis members provided with a hole for passing a blood vessel in the center, and fastening means for fastening the two anastomosis members in a face-to-face state. A vascular anastomosis instrument is known (see, for example, Patent Document 1). At the end portion of each anastomosis member, a hook portion for folding the blood vessel end portion outward is provided.
In a conventional vascular anastomosis instrument, two anastomosis members are faced to each other so that the inner surfaces of the blood vessel ends are aligned with each other while the blood vessel ends are hooked through the blood vessels through the holes of the anastomosis members, and further tightened with fastening means. By combining them, the blood vessels are anastomosed.

従来の血管吻合器具によれば、上記の構成からなる吻合部材及び締結手段を備えているため、血管の内面同士が接した状態で血管を吻合することが可能となる。
また、従来の血管吻合器具によれば、縫合糸で血管を縫合するといった非常に煩雑な作業を行うことも無いので、手術効率を大幅に向上することが可能となるとともに、術者の手技レベルへの依存度を極力低くすることが可能となる。
According to the conventional blood vessel anastomosis instrument, since the anastomosis member and the fastening means having the above-described configuration are provided, the blood vessels can be anastomosed with the inner surfaces of the blood vessels in contact with each other.
In addition, according to the conventional vascular anastomosis instrument, there is no need to perform a very complicated operation such as suturing a blood vessel with a suture thread, so that the surgical efficiency can be greatly improved and the operator's technique level can be improved. It becomes possible to make the dependence on the as low as possible.

実開昭61−118308号公報Japanese Utility Model Publication No. 61-118308

しかしながら、従来の血管吻合器具においては、吻合部材が配置された部分の血管外周面は吻合部材と完全に密着した状態となるため、血管外周面の表層部を流れる血液の流れは、吻合部材によって遮断されてしまうこととなる。その結果、血管外周面の表層部に存在する細胞の一部が壊死してしまう可能性がある。   However, in the conventional vascular anastomosis instrument, the blood vessel outer peripheral surface of the portion where the anastomotic member is arranged is in close contact with the anastomotic member. It will be blocked. As a result, some of the cells present on the surface layer of the outer peripheral surface of the blood vessel may be necrotized.

なお、このような問題は、血管吻合器具に限らず、血管以外の管状組織(例えば、消化管、胆管、尿管、尿道等)を吻合するために用いる管状組織吻合器具全般に対して存在するものである。   Such a problem is not limited to a vascular anastomosis instrument, but exists for all tubular tissue anastomosis instruments used for anastomosing tubular tissues other than blood vessels (eg, digestive tract, bile duct, ureter, urethra, etc.). Is.

そこで、本発明は、このような問題を解決するためになされたもので、手術効率を大幅に向上することが可能で、かつ、術者の手技レベルへの依存度を極力低くすることを可能としつつ、管状組織外周面の表層部に存在する細胞の壊死を抑制することが可能な管状組織吻合器具を提供することを目的とする。   Therefore, the present invention has been made to solve such a problem, and it is possible to greatly improve the surgical efficiency and to reduce the dependence on the operator's technique level as much as possible. An object of the present invention is to provide a tubular tissue anastomosis instrument capable of suppressing necrosis of cells present on the surface layer portion of the outer peripheral surface of the tubular tissue.

[1]本発明の管状組織吻合器具(1)は、略管状の外側吻合部材(10)と、前記外側吻合部材(10)との間に所定の隙間(g)を設けるようにして前記外側吻合部材(10)の内側に配置される略管状の内側吻合部材(20)とを備える管状組織吻合器具(1)であって、当該管状組織吻合器具は、管状組織の吻合対象部分を前記隙間に配置した状態で、前記外側及び内側吻合部材で当該吻合対象部分を挟むように吻合するタイプのものであり、前記外側及び内側吻合部材(10,20)のうち少なくとも一方の吻合部材は、所定の形状記憶処理が施され、第1形状から、当該第1形状よりも前記隙間が広くなる第2形状に変形処理された、形状記憶性能を備える部材であって、所定温度以上に再加熱することにより、前記隙間を狭くするように前記第2形状から前記第1形状へと変形可能に構成されており、前記外側吻合部材(10)は、略管状の一方側の開口端(12)から他方側の開口端(14)に向けて、管壁部分を構成する側面の一部が削除された形状であり、かつ、前記外側及び内側吻合部材(10,20)のうち少なくとも一方の吻合部材が前記第2形状のとき、前記外側吻合部材(10)の側面の削除された部分を介して管状組織の側方から前記外側吻合部材(10)を取り付けることが可能であることを特徴とする。
[1] The tubular tissue anastomosis instrument (1) of the present invention is configured so that a predetermined gap (g) is provided between the substantially tubular outer anastomosis member (10) and the outer anastomosis member (10). A tubular tissue anastomosis instrument (1) comprising a substantially tubular inner anastomosis member (20) disposed inside an anastomosis member (10), wherein the tubular tissue anastomosis instrument includes a gap between the anastomosis target portion of the tubular tissue and the gap. In the state where the anastomosis member is sandwiched between the outer and inner anastomosis members, and at least one of the outer and inner anastomosis members (10, 20) is predetermined. The shape memory processing is performed, and the member having the shape memory performance is deformed from the first shape to the second shape in which the gap is wider than the first shape, and is reheated to a predetermined temperature or higher. By narrowing the gap Is configured to be transformed into the first shape from the second shape so that the outer anastomosis member (10), the opening end of the other side from the one side of the open end of the substantially tubular (12) (14 ) in towards and partially deleted shape der sides constituting the wall portion is, and, at least one of the anastomosis member of the outer and inner anastomosis member (10, 20) of the second shape when, wherein said can der Rukoto attaching the outer anastomosis member (10) through the removed portion from the side of the tubular tissue of a side surface of the outer anastomosis member (10).

このため、本発明の管状組織吻合器具によれば、管状組織を吻合するにあたり、管状組織に対して各吻合部材を配置した後、形状記憶性能を備える吻合部材を所定温度以上に再び加熱するだけでよいことから、縫合糸で血管を縫合するといった非常に煩雑な作業を行わなくてよい。その結果、手術効率を大幅に向上することが可能となるとともに、術者の手技レベルへの依存度を極力低くすることが可能となる。   Therefore, according to the tubular tissue anastomosis instrument of the present invention, when anastomosing the tubular tissue, after placing each anastomotic member on the tubular tissue, the anastomosis member having shape memory performance is only heated again to a predetermined temperature or higher. Therefore, it is not necessary to perform a very complicated operation such as suturing a blood vessel with a suture thread. As a result, the surgical efficiency can be greatly improved, and the degree of dependence on the operator's technique level can be reduced as much as possible.

また、本発明の管状組織吻合器具によれば、管状組織の外面側に配置される外側吻合部材が、一方側の開口端から他方側の開口端に向けて側面の一部が削除された形状であるため、外側吻合部材を管状組織の外周面に配置したときの、当該外側吻合部材が配置された部分の管状組織を周方向に沿って見ると、外側吻合部材と接触している部分(接触部分)と接触していない部分(非接触部分)とが存在することとなる。この非接触部分が、表層部を流れる血液の流路となり得るため、管状組織外周面の表層部の血流が吻合部材によって遮断されてしまうことが無くなり、結果として、管状組織外周面の表層部に存在する細胞が壊死するのを抑制することが可能となる。   According to the tubular tissue anastomosis instrument of the present invention, the outer anastomosis member disposed on the outer surface side of the tubular tissue has a shape in which a part of the side surface is deleted from the opening end on one side toward the opening end on the other side. Therefore, when the outer anastomosis member is disposed on the outer peripheral surface of the tubular tissue, when the tubular tissue of the portion where the outer anastomosis member is disposed is viewed along the circumferential direction, the portion in contact with the outer anastomosis member ( A contact portion) and a non-contact portion (non-contact portion) exist. Since this non-contact portion can be a flow path for blood flowing in the surface layer portion, the blood flow in the surface layer portion on the outer peripheral surface of the tubular tissue is not blocked by the anastomosis member, and as a result, the surface layer portion on the outer peripheral surface of the tubular tissue It is possible to suppress the necrosis of cells existing in the cell.

したがって、本発明の管状組織吻合器具は、手術効率を大幅に向上することが可能で、かつ、術者の手技レベルへの依存度を極力低くすることを可能としつつ、管状組織外周面の表層部に存在する細胞の壊死を抑制することが可能な管状組織吻合器具となる。   Therefore, the tubular tissue anastomosis instrument of the present invention can greatly improve the surgical efficiency, and can reduce the dependence on the operator's technique level as much as possible, while the surface layer on the outer peripheral surface of the tubular tissue. It becomes a tubular tissue anastomosis instrument capable of suppressing necrosis of cells present in the part.

また、本発明の管状組織吻合器具によれば、上述したように、外側吻合部材の側面の一部が削除された形状であることから、管状組織を吻合するにあたって、外側吻合部材の中に管状組織の一方端をわざわざ通さなくても、外側吻合部材の側面の当該削除された部分を介して管状組織の側方から外側吻合部材を取り付けることが可能である。このため、手術効率のさらなる向上を図ることが可能となる。   Further, according to the tubular tissue anastomosis instrument of the present invention, as described above, since a part of the side surface of the outer anastomosis member is removed, the tubular tissue is inserted into the outer anastomosis member when anastomosing the tubular tissue. It is possible to attach the outer anastomosis member from the side of the tubular tissue through the removed portion of the side of the outer anastomosis member without bothering through one end of the tissue. For this reason, it is possible to further improve the surgical efficiency.

なお、この明細書において「一方側の開口端から他方側の開口端に向けて側面の一部が削除された形状」とは、例えば、外側吻合部材が円管である場合には、断面C字状となる形状のことを意味しており、外側吻合部材が断面四角形の角管である場合には、断面コの字状となる形状のことを意味している。   In this specification, “a shape in which a part of the side surface is removed from the opening end on one side toward the opening end on the other side” means, for example, that the cross-section C when the outer anastomosis member is a circular tube. In the case where the outer anastomosis member is a square tube having a quadrangular cross section, it means a shape having a U shape in cross section.

[2]上記[1]に記載の管状組織吻合器具(2)においては、前記外側吻合部材(30)は、複数のリング状部材(32,36)からなり、前記複数のリング状部材(32,36)のそれぞれは、リングの一方側の開口端から他方側の開口端に向けて、リングの一部が削除された形状であり、前記複数のリング状部材(32,36)を前記吻合対象部分に配置したときの、隣り合う前記リング状部材の当該削除された部分の位置は、周方向に沿って所定量ずれていることが好ましい。
[2] In the tubular tissue anastomosis instrument (2) according to the above [1], the outer anastomosis member (30) includes a plurality of ring-shaped members (32, 36), and the plurality of ring-shaped members (32). , 36 each), toward the other side of the opening end from the one side of the open end of the ring has a shape in which a part of the ring is removed, the anastomosis said plurality of ring-shaped member (32, 36) It is preferable that the position of the deleted portion of the adjacent ring-shaped members when arranged in the target portion is shifted by a predetermined amount along the circumferential direction.

隣り合うリング状部材の当該削除された部分の位置が周方向に沿って所定量ずれていることにより、管状組織に望ましくない応力が加わったとしても外側吻合部材が外れにくくなるため、吻合力の強い管状組織吻合器具となる。   Since the position of the deleted portion of the adjacent ring-shaped member is shifted by a predetermined amount along the circumferential direction, the outer anastomosis member is difficult to come off even if an undesirable stress is applied to the tubular tissue. It becomes a strong tubular tissue anastomosis instrument.

[3]上記[2]に記載の管状組織吻合器具(2)においては、前記隣り合うリング状部材(32,36)は、前記削除された部分の位置が管軸(2ax)を中心として点対称となるように配置されていることが好ましい。 [3] In the tubular tissue anastomosis instrument (2) according to the above [2], in the adjacent ring-shaped members (32, 36), the position of the deleted portion is pointed around the tube axis (2ax). It is preferable that they are arranged symmetrically.

このように構成することにより、外側吻合部材がより外れにくくなるため、吻合力をより強くすることが可能となる。また、この効果に加えて、各リング状部材が管軸方向に沿って所定距離をあけて並置されている場合に次の効果がある。
すなわち、各リング状部材が管軸方向に沿って所定距離をあけて並置されている場合は、管状組織の表層部のうち、リング状部材とリング状部材との間の領域の表層部に対しても血液を行き渡らせることが望ましいが、上記のように構成することにより、当該領域の表層部に対して血液を満遍なく行き渡らせることが可能となる。その結果、管状組織外周面の表層部に存在する細胞の壊死をさらに抑制することが可能となる。
By comprising in this way, since an outer anastomosis member becomes difficult to remove | deviate, it becomes possible to make anastomosis force stronger. In addition to this effect, the following effects are obtained when the ring-shaped members are juxtaposed at a predetermined distance along the tube axis direction.
That is, when the ring-shaped members are juxtaposed at a predetermined distance along the tube axis direction, the surface layer portion of the region between the ring-shaped member and the ring-shaped member is the surface layer portion of the tubular tissue. However, it is desirable to distribute blood, but by configuring as described above, it is possible to distribute blood evenly to the surface layer portion of the region. As a result, it becomes possible to further suppress the necrosis of cells existing in the surface layer portion of the outer peripheral surface of the tubular tissue.

[4]上記[1]〜[3]のいずれか1つに記載の管状組織吻合器具(1)においては、前記外側及び内側吻合部材のうち前記所定の形状記憶処理が施されたほうの吻合部材(10)は、脂肪族エステル系樹脂を、所定の成形温度に加熱して第1形状に成形し、当該第1形状からなる成形体を前記樹脂のガラス転移点よりも高く前記樹脂の融点よりも低い温度で第2形状に変形処理し、当該変形処理された前記第2形状からなる中間体を前記樹脂のガラス転移点よりも低い温度に冷却して前記第2形状に形状固定することにより形成された、形状記憶性能を備えるものであり、かつ、所定温度以上に再加熱することにより、前記隙間を狭くするように前記第2形状から前記第1形状へと変形可能に構成されていることが好ましい。 [4] In the tubular tissue anastomosis instrument (1) according to any one of [1] to [3], the anastomosis of the outer and inner anastomosis members that has been subjected to the predetermined shape memory processing. The member (10) is formed by heating an aliphatic ester resin to a first shape by heating to a predetermined molding temperature, and forming a molded body having the first shape higher than the glass transition point of the resin. Deforming to a second shape at a lower temperature, cooling the deformed intermediate body of the second shape to a temperature lower than the glass transition point of the resin, and fixing the shape to the second shape Formed with the shape memory performance, and is configured to be deformable from the second shape to the first shape so as to narrow the gap by reheating to a predetermined temperature or higher. Preferably it is.

本発明の「所定の形状記憶処理が施された吻合部材」としては、例えば形状記憶合金からなる吻合部材を用いてもよいが、上記のように脂肪族エステル系樹脂を材料とする吻合部材を用いる方が、軽量で成形が容易であり、コスト面での低廉化も図ることが可能となる。また、脂肪族エステル系樹脂は、生分解性を有することから、本発明の管状組織吻合器具は、生分解性に優れた吻合器具となる。   For example, an anastomosis member made of a shape memory alloy may be used as the “anastomosis member subjected to the predetermined shape memory treatment” of the present invention, but an anastomosis member made of an aliphatic ester resin as described above is used. The use is lighter and easier to mold, and the cost can be reduced. Moreover, since the aliphatic ester resin has biodegradability, the tubular tissue anastomosis instrument of the present invention is an anastomosis instrument excellent in biodegradability.

[5]上記[4]に記載の管状組織吻合器具(1b)においては、前記外側及び内側吻合部材(10b,20b)はともに、脂肪族エステル系樹脂から構成された前記形状記憶性能を備えるものであり、前記外側吻合部材(10b)は、所定温度以上に再加熱することにより、前記隙間を狭くするように前記第2形状から前記第1形状へと収縮変形可能に構成されており、前記内側吻合部材(20b)は、所定温度以上に再加熱することにより、前記隙間を狭くするように前記第2形状から前記第1形状へと拡張変形可能に構成されていることが好ましい。 [5] In the tubular tissue anastomosis instrument (1b) according to the above [4], both the outer and inner anastomosis members (10b, 20b) have the shape memory performance made of an aliphatic ester resin. The outer anastomosis member (10b) is configured to be contractible and deformable from the second shape to the first shape so as to narrow the gap by reheating to a predetermined temperature or higher, The inner anastomosis member (20b) is preferably configured to be expandable and deformable from the second shape to the first shape so as to narrow the gap by reheating to a predetermined temperature or higher.

このように構成することにより、各吻合部材を所定温度に再加熱したときに2つの吻合部材と管状組織との間に発生する挟持力をより強くすることが可能となるため、吻合力の強い管状組織吻合器具となる。   By configuring in this way, it becomes possible to increase the clamping force generated between the two anastomosis members and the tubular tissue when each anastomosis member is reheated to a predetermined temperature. It becomes a tubular tissue anastomosis instrument.

[6]上記[1]〜[5]のいずれか1つに記載の管状組織吻合器具においては、前記外側及び内側吻合部材のうち少なくとも一方の吻合部材は、複数の孔が設けられた構造を有することが好ましい。 [6] In the tubular tissue anastomosis instrument according to any one of [1] to [5], at least one of the outer and inner anastomosis members has a structure in which a plurality of holes are provided. It is preferable to have.

このように構成することにより、吻合部分の管状組織に加わる圧力を軽減することができるため、吻合部分の管状組織の表層部を通る血流が滞ってしまうのを抑制することができ、結果として、吻合部分の細胞が壊死するのをさらに抑制することが可能となる。   By configuring in this way, the pressure applied to the tubular tissue of the anastomosis portion can be reduced, so that the blood flow through the surface layer portion of the tubular tissue of the anastomosis portion can be suppressed, and as a result Further, it becomes possible to further suppress the necrosis of the cells in the anastomosis portion.

なお、特許請求の範囲及び本欄(課題を解決するための手段の欄)に記載した各部材等の文言下に括弧をもって付加された符号は、特許請求の範囲及び本欄に記載された内容の理解を容易にするために用いられたものであって、特許請求の範囲及び本欄に記載された内容を限定するものではない。   In addition, the reference numerals added in parentheses below the wording of each member, etc. described in the claims and in this column (column of means for solving the problems) are the contents described in the claims and this column. It is used for facilitating understanding of the present invention, and does not limit the contents described in the claims and in this section.

実施形態1に係る管状組織吻合器具1を説明するために示す図。The figure shown in order to demonstrate the tubular tissue anastomosis instrument 1 concerning Embodiment 1. FIG. 外側吻合部材10の製造方法を説明するために示すフローチャート。The flowchart shown in order to demonstrate the manufacturing method of the outer side anastomosis member 10. FIG. 外側吻合部材10製造時の温度条件を模式的に示す図。The figure which shows typically the temperature conditions at the time of the outer side anastomosis member 10 manufacture. 実施形態1に係る管状組織吻合器具1を用いて血管を吻合する方法を説明するために示す図。The figure shown in order to demonstrate the method of anastomosing the blood vessel using the tubular tissue anastomosis instrument 1 concerning Embodiment 1. FIG. 実施形態1に係る管状組織吻合器具1を用いて血管を吻合する方法を説明するために示す図。The figure shown in order to demonstrate the method of anastomosing the blood vessel using the tubular tissue anastomosis instrument 1 concerning Embodiment 1. FIG. 管状組織吻合器具1を用いて血管を吻合する方法の変形例を説明するために示す図。The figure shown in order to demonstrate the modification of the method of anastomosing the blood vessel using the tubular tissue anastomosis instrument 1. FIG. 実施形態2に係る管状組織吻合器具2を説明するために示す図。The figure shown in order to demonstrate the tubular tissue anastomosis instrument 2 concerning Embodiment 2. FIG. 実施形態1の変形例1〜4に係る管状組織吻合器具1a〜1dを説明するために示す図。The figure shown in order to demonstrate the tubular tissue anastomosis instruments 1a-1d which concern on the modifications 1-4 of Embodiment 1. FIG.

以下、本発明の管状組織吻合器具について、図に示す実施の形態に基づいて説明する。なお、以下の説明においては、管状組織の一例としての血管に、本発明の管状組織吻合器具を用いた場合を例示して説明する。   Hereinafter, the tubular tissue anastomosis instrument of the present invention will be described based on the embodiments shown in the drawings. In the following description, a case where the tubular tissue anastomosis instrument of the present invention is used for a blood vessel as an example of a tubular tissue will be described.

[実施形態1]
まず、実施形態1に係る管状組織吻合器具1の構成について、図1を用いて説明する。
図1は、実施形態1に係る管状組織吻合器具1を説明するために示す図である。図1(a)は管状組織吻合器具1の斜視図であり、図1(b)は管状組織吻合器具1の正面図(図1(a)のA方向から見た図)であり、図1(c)は管状組織吻合器具1の背面図であり、図1(d)は管状組織吻合器具1の平面図であり、図1(e)は管状組織吻合器具1の右側面図である。なお、図1(a)は、外側吻合部材10と内側吻合部材20とを組み合わせていない状態で図示しており、図1(b)〜図1(e)は、外側吻合部材10と内側吻合部材20とを組み合わせた状態で図示している。
[Embodiment 1]
First, the configuration of the tubular tissue anastomosis instrument 1 according to Embodiment 1 will be described with reference to FIG.
FIG. 1 is a view for explaining the tubular tissue anastomosis instrument 1 according to the first embodiment. 1A is a perspective view of the tubular tissue anastomosis instrument 1, and FIG. 1B is a front view of the tubular tissue anastomosis instrument 1 (viewed from the direction A in FIG. 1A). (C) is a rear view of the tubular tissue anastomosis instrument 1, FIG. 1 (d) is a plan view of the tubular tissue anastomosis instrument 1, and FIG. 1 (e) is a right side view of the tubular tissue anastomosis instrument 1. 1A shows the state in which the outer anastomosis member 10 and the inner anastomosis member 20 are not combined, and FIGS. 1B to 1E show the outer anastomosis member 10 and the inner anastomosis member. The member 20 is shown in a combined state.

実施形態1に係る管状組織吻合器具1は、図1に示すように、外側吻合部材10と、外側吻合部材10との間に所定の隙間gを設けるようにして外側吻合部材10の内側に配置された内側吻合部材20とを備える。
管状組織吻合器具1は、詳細については後述するが、血管の吻合対象部分を隙間gに配置した状態で、外側及び内側吻合部材10,20で当該吻合対象部分を挟むように吻合するタイプのものである。
The tubular tissue anastomosis instrument 1 according to Embodiment 1 is disposed inside the outer anastomosis member 10 so as to provide a predetermined gap g between the outer anastomosis member 10 and the outer anastomosis member 10, as shown in FIG. And an inner anastomosis member 20 formed.
The tubular tissue anastomosis instrument 1, which will be described in detail later, is of a type that anastomoses so as to sandwich the anastomosis target portion between the outer and inner anastomosis members 10, 20 in a state where the anastomosis target portion of the blood vessel is disposed in the gap g. It is.

外側吻合部材10は、略管状であって、一方側の開口端12から他方側の開口端14に向けて側面の一部が削除された形状である。実施形態1の場合、図1(a)及び図1(e)から分かるように、外側吻合部材10は断面C字状となる形状である。
外側吻合部材10の切欠き角度θ(図1(e)参照。)は、例えば140度である。ここで、「切欠き角度」とは、吻合部材(外側吻合部材10)を管軸1ax方向に沿って見たとき(図1(e)に示すようにして見たとき)の、管軸1axを中心として側面の一方端部16から他方端部18までの角度のことをいう。
The outer anastomosis member 10 is substantially tubular and has a shape in which a part of the side surface is removed from the opening end 12 on one side toward the opening end 14 on the other side. In the case of Embodiment 1, as can be seen from FIGS. 1A and 1E, the outer anastomosis member 10 has a C-shaped cross section.
The notch angle θ (see FIG. 1E) of the outer anastomosis member 10 is, for example, 140 degrees. Here, the “notch angle” means the tube axis 1ax when the anastomosis member (outer anastomosis member 10) is viewed along the tube axis 1ax direction (when viewed as shown in FIG. 1 (e)). Is the angle from one end 16 to the other end 18 of the side surface.

内側吻合部材20は、直管状であり、図1(a)及び図1(e)から分かるように、断面円環状となる形状である。   The inner anastomosis member 20 is a straight tube, and as shown in FIGS. 1 (a) and 1 (e), the inner anastomosis member 20 has an annular cross section.

外側吻合部材10は、長さが例えば2.0mmであり、内径が例えば1.5mmであり、肉厚が例えば0.2mmに設定されている。
内側吻合部材20は、長さが例えば3.0mmであり、内径が例えば1.1mmであり、肉厚が例えば0.3mmに設定されている。
なお、本発明の管状組織吻合器具における外側及び内側吻合部材の長さ等については、これらの数値に限定されるものではない。
The outer anastomosis member 10 has a length of, for example, 2.0 mm, an inner diameter of, for example, 1.5 mm, and a wall thickness of, for example, 0.2 mm.
The inner anastomosis member 20 has a length of, for example, 3.0 mm, an inner diameter of, for example, 1.1 mm, and a wall thickness of, for example, 0.3 mm.
The lengths of the outer and inner anastomosis members in the tubular tissue anastomosis instrument of the present invention are not limited to these numerical values.

外側及び内側吻合部材10,20は、脂肪族エステル系樹脂から構成されている。脂肪族エステル系樹脂としては、例えば、ポリ(ラクチド)類、ポリ(グリコリド)類、ポリ(ラクチド−コ−グリコリド)類、ポリ(乳酸)類、ポリ(グリコール酸)類、ポリ(乳酸−コ−グリコール酸)類、ポリカプロラクトン類、ポリカーボネート類、ポリエステルアミド類、ポリアンヒドリド類、ポリ(アミノ酸)類、ポリオルトエステル類、ポリアセタール類、ポリシアノアクリレート類、ポリエーテルエステル類、ポリ(ジオキサノン)類、ポリ(アルキレンアルキレート)類、ポリエチレングリコールとポリオルトエステルとのコポリマー、生分解性ポリウレタン混合物、その他これらの共重合体、ポリマーアロイなどの樹脂を好適に用いることができる。
実施形態1の場合、外側及び内側吻合部材10,20は、例えば、ポリ乳酸−ポリグリコール酸−ポリεカプロラクトンの共重合体から構成されている。
The outer and inner anastomosis members 10, 20 are made of an aliphatic ester resin. Examples of aliphatic ester resins include poly (lactides), poly (glycolides), poly (lactide-co-glycolide) s, poly (lactic acid) s, poly (glycolic acid) s, poly (lactic acid-copolymers). -Glycolic acid) s, polycaprolactones, polycarbonates, polyesteramides, polyanhydrides, poly (amino acids), polyorthoesters, polyacetals, polycyanoacrylates, polyetheresters, poly (dioxanone) s Resins such as poly (alkylene alkylates), copolymers of polyethylene glycol and polyorthoesters, biodegradable polyurethane mixtures, copolymers of these, and polymer alloys can be suitably used.
In the case of Embodiment 1, the outer and inner anastomosis members 10 and 20 are made of, for example, a copolymer of polylactic acid-polyglycolic acid-polyεcaprolactone.

詳細については後述するが、外側吻合部材10は、所定の形状記憶処理が施された、形状記憶性能を備える部材であって、所定温度以上に再加熱することにより、隙間gを狭くするようにその形状を変形可能に構成されている。   As will be described in detail later, the outer anastomosis member 10 is a member having a shape memory performance that has been subjected to a predetermined shape memory process, and is reheated to a predetermined temperature or higher so as to narrow the gap g. The shape is configured to be deformable.

次に、外側吻合部材10の製造方法について、図2及び図3を用いてさらに詳細に説明する。
図2は、外側吻合部材10の製造方法を説明するために示すフローチャートである。図3は、外側吻合部材10製造時の温度条件を模式的に示す図である。
Next, the manufacturing method of the outer anastomosis member 10 will be described in more detail with reference to FIGS.
FIG. 2 is a flowchart for explaining a method for manufacturing the outer anastomosis member 10. FIG. 3 is a diagram schematically showing temperature conditions when the outer anastomosis member 10 is manufactured.

外側吻合部材10は、図2に示すように、成形工程(成形体作製工程)S1、変形処理工程S2及び形状固定工程S3を行うことにより製造することができる。以下、これら各工程を順に説明する。   As shown in FIG. 2, the outer anastomosis member 10 can be manufactured by performing a molding step (molded body manufacturing step) S1, a deformation processing step S2, and a shape fixing step S3. Hereinafter, each of these steps will be described in order.

1.成形工程(成形体作製工程)S1
まず、脂肪族エステル系樹脂を、所定の成形温度T1に加熱して第1形状に成形する。このとき作製された第1形状からなる成形体は、図示による説明は省略するが、略管状であって、一方側の開口端から他方側の開口端に向けて側面の一部が削除された形状(図1に示す外側吻合部材10と同様の形状)である。ただし、外側吻合部材10よりも内径が小さい。
成形工程S1における成形温度T1は、図3に示すように、使用する樹脂のガラス転移点Tgよりも高く当該樹脂の融点Tmよりも低い温度である。脂肪族エステル系樹脂として「ポリ乳酸−ポリグリコール酸−ポリεカプロラクトンの共重合体」を用いた場合、成形温度T1は、例えば約120℃であり、ガラス転移点Tgは、例えば約60℃であり、融点Tmは、例えば約135℃である。
なお、作製後の成形体は、室温まで急冷している。
1. Molding process (molded body manufacturing process) S1
First, the aliphatic ester resin is heated to a predetermined molding temperature T1 and molded into a first shape. The molded body having the first shape produced at this time is not shown in the figure, but is substantially tubular, and a part of the side surface is removed from the opening end on one side to the opening end on the other side. The shape (the same shape as the outer anastomosis member 10 shown in FIG. 1). However, the inner diameter is smaller than that of the outer anastomosis member 10.
As shown in FIG. 3, the molding temperature T1 in the molding step S1 is higher than the glass transition point Tg of the resin used and lower than the melting point Tm of the resin. When “polylactic acid-polyglycolic acid-polyεcaprolactone copolymer” is used as the aliphatic ester resin, the molding temperature T1 is, for example, about 120 ° C., and the glass transition point Tg is, for example, about 60 ° C. The melting point Tm is about 135 ° C., for example.
In addition, the molded object after preparation is rapidly cooled to room temperature.

2.変形処理工程S2
次に、第1形状からなる成形体を、ガラス転移点Tgよりも高く融点Tmよりも低い温度T2に加熱し、第2形状に変形処理する。このとき作製された第2形状からなる中間体は、図示による説明は省略するが、略管状であって、一方側の開口端から他方側の開口端に向けて側面の一部が削除された形状(図1に示す外側吻合部材10と同様の形状)である。また、第2形状からなる中間体は、内径寸法も含めて、外側吻合部材10とほぼ同じサイズである。
脂肪族エステル系樹脂として「ポリ乳酸−ポリグリコール酸−ポリεカプロラクトンの共重合体」を用いた場合、温度T2は、例えば約70℃である。
2. Deformation processing step S2
Next, the molded body having the first shape is heated to a temperature T2 that is higher than the glass transition point Tg and lower than the melting point Tm, and is deformed into the second shape. The intermediate body having the second shape produced at this time is not shown in the figure, but is substantially tubular, and a part of the side surface is removed from the opening end on one side to the opening end on the other side. The shape (the same shape as the outer anastomosis member 10 shown in FIG. 1). Moreover, the intermediate body which consists of a 2nd shape is the substantially same size as the outer side anastomosis member 10, including an internal diameter dimension.
When a “polylactic acid-polyglycolic acid-polyεcaprolactone copolymer” is used as the aliphatic ester resin, the temperature T2 is about 70 ° C., for example.

3.形状固定工程S3
そして、変形処理された第2形状からなる中間体を、ガラス転移点Tgよりも低い温度T3に冷却して(例えば、25℃程度の室温環境下に放置して)、第2形状に形状固定する。
3. Shape fixing process S3
Then, the deformed intermediate body having the second shape is cooled to a temperature T3 lower than the glass transition point Tg (for example, left in a room temperature environment of about 25 ° C.), and the shape is fixed to the second shape. To do.

以上の工程を行うことによって製造された外側吻合部材10は、所定温度T4以上に再び加熱することにより、上記した第2形状から第1形状へと変形可能に構成されている。脂肪族エステル系樹脂として「ポリ乳酸−ポリグリコール酸−ポリεカプロラクトンの共重合体」を用いた場合、この再加熱したときの温度(以下、再加熱温度)T4は、例えば約60℃である。
なお、人体の体温が約35℃〜37℃であることから、再加熱温度T4は、40℃以上であることが好ましい。一方、再加熱したときの生体組織の細胞への影響を考慮すると、再加熱温度T4は、70℃以下であることが好ましい。
このような観点から、再加熱温度T4は、40℃〜70℃であることが好ましい。
The outer anastomosis member 10 manufactured by performing the above steps is configured to be deformable from the second shape described above to the first shape by being heated again to a predetermined temperature T4 or higher. When a “polylactic acid-polyglycolic acid-polyεcaprolactone copolymer” is used as the aliphatic ester resin, the reheated temperature (hereinafter referred to as reheating temperature) T4 is, for example, about 60 ° C. .
In addition, since the body temperature of a human body is about 35 degreeC-37 degreeC, it is preferable that reheating temperature T4 is 40 degreeC or more. On the other hand, the reheating temperature T4 is preferably 70 ° C. or lower in consideration of the influence on the cells of the living tissue when reheated.
From such a viewpoint, the reheating temperature T4 is preferably 40 ° C to 70 ° C.

次に、実施形態1に係る管状組織吻合器具1を用いて血管を吻合する方法の一例について、図4及び図5を用いて説明する。
図4及び図5は、実施形態1に係る管状組織吻合器具1を用いて血管を吻合する方法を説明するために示す図である。図4(a)〜図5(e−1)及び図5(e−2)は血管を吻合する流れを示す図である。図4(a)〜図4(d)並びに図5(a)、図5(b−1)、図5(d−2)及び図5(e−2)においては、外側及び内側吻合部材10,20並びに血管V1,V2を側面断面で図示しており、図5(b−2)、図5(c)、図5(d−1)及び図5(e−1)においては、図5(b−1)のA−A線で切断したときの断面で図示している。
なお、図4及び図5においては、発明の理解を容易にするため、外側及び内側吻合部材10,20の肉厚並びに血管V1,V2の厚み(血管壁の厚み)については、模式的に図示している。また、図4においては、血管V1の外径と内側吻合部材20の内径とを同じにしたものを図示しているが、これは図の簡略化を図ったことに由来するものであり、血管V1の外径と内側吻合部材20の内径とが同じである必要はない。
Next, an example of a method for anastomosing blood vessels using the tubular tissue anastomosis instrument 1 according to Embodiment 1 will be described with reference to FIGS. 4 and 5.
4 and 5 are views for explaining a method for anastomosing blood vessels using the tubular tissue anastomosis instrument 1 according to the first embodiment. 4 (a) to 5 (e-1) and 5 (e-2) are diagrams showing the flow of anastomosing blood vessels. 4 (a) to 4 (d) and FIGS. 5 (a), 5 (b-1), 5 (d-2), and 5 (e-2), the outer and inner anastomosis members 10 are shown. , 20 and blood vessels V1, V2 are shown in a side cross-section, and in FIGS. 5 (b-2), 5 (c), 5 (d-1), and 5 (e-1), FIG. It is shown in a cross section when cut along line AA in (b-1).
4 and 5, the thicknesses of the outer and inner anastomosis members 10 and 20 and the thicknesses of the blood vessels V1 and V2 (thickness of the blood vessel wall) are schematically illustrated in order to facilitate understanding of the invention. Show. Further, in FIG. 4, the outer diameter of the blood vessel V1 and the inner diameter of the inner anastomosis member 20 are illustrated, but this is derived from the simplification of the drawing. The outer diameter of V1 and the inner diameter of the inner anastomosis member 20 do not have to be the same.

管状組織吻合器具1を用いて2つの血管V1,V2を吻合するにあたっては、まず、図4(a)〜図4(c)に示すように、内側吻合部材20を一方の血管V1の外側に通し、内側吻合部材20を所定位置まで移動させる。
次に、図4(c)及び図4(d)に示すように、血管V1の内面が露出するようにして血管V1の端部を外側に折り返す。
次に、図5(a)〜図5(b−2)に示すように、血管V1の内面の露出した部分(折り返された部分)を覆うように血管V2を被せ、血管V1と血管V2とを重ね合わせる。このようにすると、血管V1,V2の内面同士が接することとなる。
次に、図5(c)に示すように、血管V1,V2の側方から外側吻合部材10を取り付ける。外側吻合部材10を取り付けると、図5(d−1)及び図5(d−2)から分かるように、外側吻合部材10と内側吻合部材20との間(隙間)に血管V1,V2の吻合対象部分が配置された状態となる。
そして、外側吻合部材10を所定温度以上(例えば60℃)に加熱する。これにより、外側吻合部材10と内側吻合部材20との隙間が狭くなる方向(図5(d−1)及び図5(d−2)の白矢印方向)に向けて、外側吻合部材10が収縮変形し、血管V1,V2の吻合が完了する(図5(e−1)及び図5(e−2)参照。)。
When the two blood vessels V1 and V2 are anastomosed using the tubular tissue anastomosis instrument 1, first, as shown in FIGS. 4A to 4C, the inner anastomosis member 20 is placed outside one blood vessel V1. Through, the inner anastomosis member 20 is moved to a predetermined position.
Next, as shown in FIGS. 4C and 4D, the end portion of the blood vessel V1 is folded outward so that the inner surface of the blood vessel V1 is exposed.
Next, as shown in FIGS. 5A to 5B-2, the blood vessel V2 is covered so as to cover the exposed portion (folded portion) of the inner surface of the blood vessel V1, and the blood vessel V1 and the blood vessel V2 are covered. Are superimposed. In this way, the inner surfaces of the blood vessels V1 and V2 come into contact with each other.
Next, as shown in FIG.5 (c), the outer side anastomosis member 10 is attached from the side of the blood vessels V1 and V2. When the outer anastomosis member 10 is attached, as shown in FIGS. 5 (d-1) and 5 (d-2), the anastomosis of the blood vessels V1 and V2 between the outer anastomosis member 10 and the inner anastomosis member 20 (gap). The target part is placed.
Then, the outer anastomosis member 10 is heated to a predetermined temperature or higher (for example, 60 ° C.). As a result, the outer anastomosis member 10 contracts in the direction in which the gap between the outer anastomosis member 10 and the inner anastomosis member 20 becomes narrower (in the direction of the white arrow in FIGS. 5 (d-1) and 5 (d-2)). It deforms and the anastomosis of the blood vessels V1 and V2 is completed (see FIGS. 5 (e-1) and 5 (e-2)).

以上のように構成された実施形態1に係る管状組織吻合器具1によれば、血管V1,V2を吻合するにあたり、血管V1,V2に対して外側及び内側吻合部材10,20を配置した後、形状記憶性能を備える外側吻合部材10を所定温度以上に再び加熱するだけでよいことから、縫合糸で血管を縫合するといった非常に煩雑な作業を行わなくてよい。その結果、手術効率を大幅に向上することが可能となるとともに、術者の手技レベルへの依存度を極力低くすることが可能となる。   According to the tubular tissue anastomosis instrument 1 according to Embodiment 1 configured as described above, after anastomosing the blood vessels V1 and V2, the outer and inner anastomosis members 10 and 20 are disposed on the blood vessels V1 and V2, Since it is only necessary to reheat the outer anastomosis member 10 having shape memory performance to a predetermined temperature or higher, it is not necessary to perform a very complicated operation such as suturing a blood vessel with a suture thread. As a result, the surgical efficiency can be greatly improved, and the degree of dependence on the operator's technique level can be reduced as much as possible.

また、実施形態1に係る管状組織吻合器具1によれば、血管の外面側に配置される外側吻合部材10が、一方側の開口端12から他方側の開口端14に向けて側面の一部が削除された形状であるため、外側吻合部材10を血管の外周面に配置したときの、外側吻合部材10が配置された部分の血管を周方向に沿って見ると、外側吻合部材10と接触している部分(接触部分)と接触していない部分(非接触部分)とが存在することとなる。この非接触部分が、表層部を流れる血液の流路となり得るため、血管外周面の表層部の血流が吻合部材によって遮断されてしまうことが無くなり、結果として、血管外周面の表層部に存在する細胞が壊死するのを抑制することが可能となる。   Moreover, according to the tubular tissue anastomosis instrument 1 according to the first embodiment, the outer anastomosis member 10 disposed on the outer surface side of the blood vessel has a part of the side surface from the opening end 12 on one side toward the opening end 14 on the other side. Since the shape is deleted, when the outer anastomosis member 10 is disposed on the outer peripheral surface of the blood vessel, the portion of the blood vessel where the outer anastomosis member 10 is disposed is viewed along the circumferential direction, and is in contact with the outer anastomosis member 10. There are portions that are in contact (contact portions) and portions that are not in contact (non-contact portions). Since this non-contact portion can be a flow path for blood flowing through the surface layer portion, the blood flow in the surface layer portion of the blood vessel outer peripheral surface is not blocked by the anastomosis member, and as a result, exists in the surface layer portion of the blood vessel outer peripheral surface. It is possible to suppress the necrosis of the cells that do.

したがって、実施形態1に係る管状組織吻合器具1は、手術効率を大幅に向上することが可能で、かつ、術者の手技レベルへの依存度を極力低くすることを可能としつつ、血管外周面の表層部に存在する細胞の壊死を抑制することが可能な管状組織吻合器具となる。   Therefore, the tubular tissue anastomosis instrument 1 according to the first embodiment can greatly improve the surgical efficiency, and can reduce the dependence on the operator's technique level as much as possible while maintaining the outer peripheral surface of the blood vessel. It becomes a tubular tissue anastomosis instrument capable of suppressing the necrosis of cells present in the surface layer portion of.

また、実施形態1に係る管状組織吻合器具1によれば、上述したように、外側吻合部材10の側面の一部が削除された形状であることから、血管V1,V2を吻合するにあたって、外側吻合部材10の中に血管V1又は血管V2の一方端をわざわざ通さなくても、外側吻合部材10の側面の当該削除された部分を介して血管V1,V2の側方から外側吻合部材10を取り付けることが可能である(図5(c)参照。)。このため、手術効率のさらなる向上を図ることが可能となる。   In addition, according to the tubular tissue anastomosis instrument 1 according to the first embodiment, as described above, since a part of the side surface of the outer anastomosis member 10 is deleted, the outer side of the anastomosis between the blood vessels V1, V2 is increased. The outer anastomosis member 10 is attached from the side of the blood vessels V1 and V2 through the deleted portion of the side surface of the outer anastomosis member 10 without bothering the one end of the blood vessel V1 or the blood vessel V2 into the anastomosis member 10. (See FIG. 5 (c)). For this reason, it is possible to further improve the surgical efficiency.

実施形態1に係る管状組織吻合器具1においては、外側吻合部材10は、脂肪族エステル系樹脂をもとにして、上記した形状記憶処理が施されたものである。これにより、例えば形状記憶合金からなる吻合部材を用いた場合に比べて、軽量で成形が容易となり、コスト面での低廉化も図ることが可能となる。また、脂肪族エステル系樹脂は、生分解性を有することから、実施形態1に係る管状組織吻合器具1は、生分解性に優れた吻合器具となる。   In the tubular tissue anastomosis instrument 1 according to Embodiment 1, the outer anastomosis member 10 is subjected to the shape memory process described above based on an aliphatic ester resin. Thereby, compared with the case where the anastomosis member which consists of a shape memory alloy is used, for example, it becomes lightweight and it becomes easy to shape | mold, and it also becomes possible to aim at cost reduction. Moreover, since the aliphatic ester resin has biodegradability, the tubular tissue anastomosis instrument 1 according to Embodiment 1 is an anastomosis instrument excellent in biodegradability.

[変形例]
上記実施形態1では、実施形態1に係る管状組織吻合器具1を用いて血管を吻合する方法として、図4及び図5を用いて説明したように、血管V1,V2の内面同士が接するようにして血管V1,V2を吻合する場合について説明したが、本発明はこれに限定されるものではなく、例えば次のようにして血管を吻合する方法もある。
[Modification]
In the first embodiment, as described with reference to FIGS. 4 and 5, the inner surfaces of the blood vessels V <b> 1 and V <b> 2 are in contact with each other as a method for anastomosing blood vessels using the tubular tissue anastomosis instrument 1 according to the first embodiment. The case where the blood vessels V1, V2 are anastomosed has been described. However, the present invention is not limited to this, and there is, for example, a method of anastomosing blood vessels as follows.

図6は、管状組織吻合器具1を用いて血管を吻合する方法の変形例を説明するために示す図である。図6(a)〜図6(f−1)及び図6(f−2)は血管を吻合する流れを示す図である。図6(a)、図6(b)、図6(e−2)及び図6(f−2)においては、外側及び内側吻合部材10,20並びに血管V1,V2を側面断面で図示しており、図6(c)、図6(d)、図6(e−1)及び図6(f−1)においては、図6(b)のB−B線で切断したときの断面で図示している。
なお、図6においては、発明の理解を容易にするため、外側及び内側吻合部材10,20の肉厚並びに血管V1,V2の厚み(血管壁の厚み)については、模式的に図示している。また、図6においては、血管V1,V2の内径と内側吻合部材20の外径とを同じにしたものを図示しているが、これは図の簡略化を図ったことに由来するものであり、血管V1,V2の内径と内側吻合部材20の外径とが同じである必要はない。
FIG. 6 is a view for explaining a modification of the method for anastomosing blood vessels using the tubular tissue anastomosis instrument 1. 6 (a) to 6 (f-1) and 6 (f-2) are diagrams showing the flow of anastomosing blood vessels. 6 (a), FIG. 6 (b), FIG. 6 (e-2) and FIG. 6 (f-2), the outer and inner anastomosis members 10, 20 and blood vessels V1, V2 are illustrated in a side sectional view. 6 (c), FIG. 6 (d), FIG. 6 (e-1), and FIG. 6 (f-1) are cross-sectional views taken along line BB in FIG. 6 (b). Show.
In FIG. 6, for easy understanding of the invention, the thicknesses of the outer and inner anastomosis members 10 and 20 and the thicknesses of the blood vessels V1 and V2 (the thickness of the blood vessel wall) are schematically illustrated. . In FIG. 6, the inner diameters of the blood vessels V1 and V2 and the outer diameter of the inner anastomosis member 20 are the same. This is because the illustration is simplified. The inner diameters of the blood vessels V1 and V2 and the outer diameter of the inner anastomosis member 20 do not have to be the same.

管状組織吻合器具1を用いて血管を吻合する方法の変形例として、まず、図6(a)〜図6(c)に示すように、内側吻合部材20を血管V1,V2の内側に通す。このとき、血管V1の端部と血管V2の端部とを当接させる。
次に、図6(d)に示すように、血管V1,V2の側方から外側吻合部材10を取り付ける。外側吻合部材10を取り付けると、図6(e−1)及び図6(e−2)から分かるように、外側吻合部材10と内側吻合部材20との間(隙間)に血管V1,V2の吻合対象部分が配置された状態となる。
そして、外側吻合部材10を所定温度以上(例えば60℃)に加熱する。これにより、外側吻合部材10と内側吻合部材20との隙間が狭くなる方向(図6(e−1)及び図6(e−2)の白矢印方向)に向けて、外側吻合部材10が収縮変形し、血管V1,V2の吻合が完了する(図6(f−1)及び図6(f−2)参照。)。
As a modification of the method of anastomosing blood vessels using the tubular tissue anastomosis instrument 1, first, as shown in FIGS. 6 (a) to 6 (c), the inner anastomosis member 20 is passed inside the blood vessels V1 and V2. At this time, the end of the blood vessel V1 is brought into contact with the end of the blood vessel V2.
Next, as shown in FIG.6 (d), the outer side anastomosis member 10 is attached from the side of the blood vessels V1 and V2. When the outer anastomosis member 10 is attached, as shown in FIGS. 6 (e-1) and 6 (e-2), the anastomosis of the blood vessels V1 and V2 between the outer anastomosis member 10 and the inner anastomosis member 20 (gap). The target part is placed.
Then, the outer anastomosis member 10 is heated to a predetermined temperature or higher (for example, 60 ° C.). As a result, the outer anastomosis member 10 contracts in the direction in which the gap between the outer anastomosis member 10 and the inner anastomosis member 20 becomes narrower (the white arrow direction in FIGS. 6E-1 and 6E-2). It deforms and the anastomosis of the blood vessels V1, V2 is completed (see FIG. 6 (f-1) and FIG. 6 (f-2)).

管状組織吻合器具1を用いて上記変形例のように吻合した場合であっても、血管V1,V2を確実に吻合することができる。   Even when anastomosis is performed using the tubular tissue anastomosis instrument 1 as in the above modification, the blood vessels V1 and V2 can be reliably anastomosed.

[実施形態2]
図7は、実施形態2に係る管状組織吻合器具2を説明するために示す図である。図7(a)は管状組織吻合器具2の斜視図であり、図7(b)は管状組織吻合器具2の正面図(図7(a)のA方向から見た図)であり、図7(c)は管状組織吻合器具2の平面図であり、図7(d)は図7(b)のC−C線断面図であり、図7(e)は図7(b)のD−D線断面図である。なお、図7(a)は、外側吻合部材30と内側吻合部材20とを組み合わせていない状態で図示しており、図7(b)〜図7(e)は、外側吻合部材30と内側吻合部材20とを組み合わせた状態で図示している。また、図7において、図1と同一の部材については同一の符号を付し、詳細な説明は省略する。
[Embodiment 2]
FIG. 7 is a view for explaining the tubular tissue anastomosis instrument 2 according to the second embodiment. 7 (a) is a perspective view of the tubular tissue anastomosis instrument 2, and FIG. 7 (b) is a front view of the tubular tissue anastomosis instrument 2 (viewed from the direction A in FIG. 7 (a)). (C) is a plan view of the tubular tissue anastomosis instrument 2, FIG. 7 (d) is a cross-sectional view taken along the line CC of FIG. 7 (b), and FIG. 7 (e) is a cross-sectional view of FIG. It is D line sectional drawing. 7A shows the state in which the outer anastomosis member 30 and the inner anastomosis member 20 are not combined, and FIGS. 7B to 7E show the outer anastomosis member 30 and the inner anastomosis member. The member 20 is shown in a combined state. In FIG. 7, the same members as those in FIG. 1 are denoted by the same reference numerals, and detailed description thereof is omitted.

実施形態2に係る管状組織吻合器具2は、基本的には実施形態1に係る管状組織吻合器具1と良く似た構成を有するが、外側吻合部材の構成が、実施形態1に係る管状組織吻合器具1とは異なる。   The tubular tissue anastomosis instrument 2 according to the second embodiment basically has a configuration similar to the tubular tissue anastomosis instrument 1 according to the first embodiment, but the configuration of the outer anastomosis member is the tubular tissue anastomosis according to the first embodiment. Different from the instrument 1.

すなわち、実施形態2に係る管状組織吻合器具2においては、図7に示すように、外側吻合部材30は、2つのリング状部材32,36からなる。各リング状部材32,36は、図7(a)及び図7(b)に示すように、略四角形の端面を有する。各リング状部材32,36は、図7(b)及び図7(c)に示すように、管軸2ax方向に沿って所定距離をあけて並置されている。   That is, in the tubular tissue anastomosis instrument 2 according to the second embodiment, the outer anastomosis member 30 includes two ring-shaped members 32 and 36 as shown in FIG. As shown in FIGS. 7A and 7B, each of the ring-shaped members 32 and 36 has a substantially square end surface. As shown in FIGS. 7B and 7C, the ring-shaped members 32 and 36 are juxtaposed at a predetermined distance along the tube axis 2ax direction.

各リング状部材32,36は、図7(d)及び図7(e)に示すように、一方側の開口端33,37から他方側の開口端34,38に向けて側面の一部が削除された形状(C字状)である。2つのリング状部材32,36を吻合対象部分に配置したとき(外側吻合部材30と内側吻合部材20とを組み合わせた状態のとき)の、リング状部材32,36の当該削除された部分の位置は、図7(d)及び図7(e)から分かるように、周方向に沿って180度ずれている。言い換えれば、隣り合うリング状部材32,36は、当該削除された部分の位置が管軸2axを中心として点対称となるように配置されている。
各リング状部材32,36の切欠き角度θ(図7(d)及び図7(e)参照。)は、例えば140度である。
As shown in FIGS. 7D and 7E, each ring-shaped member 32, 36 has a part of the side surface from the opening end 33, 37 on one side toward the opening end 34, 38 on the other side. The deleted shape (C shape). Position of the deleted portions of the ring-shaped members 32 and 36 when the two ring-shaped members 32 and 36 are disposed in the anastomosis target portion (when the outer anastomosis member 30 and the inner anastomosis member 20 are combined). As shown in FIGS. 7 (d) and 7 (e), they are shifted by 180 degrees along the circumferential direction. In other words, the adjacent ring-shaped members 32 and 36 are arranged so that the positions of the deleted portions are point-symmetric about the tube axis 2ax.
The notch angle θ (see FIGS. 7D and 7E) of each ring-shaped member 32, 36 is, for example, 140 degrees.

なお、詳細な説明は省略するが、外側吻合部材30(リング状部材32,36)には、実施形態1で説明した外側吻合部材10と同様の形状記憶処理が施されている。このため、外側吻合部材30(リング状部材32,36)は、所定温度以上(例えば60℃)に再加熱することにより、隙間g(図7(d)及び図7(e)参照。)を狭くするようにその形状を変形可能である。   Although detailed description is omitted, the outer shape anastomosis member 30 (ring-shaped members 32 and 36) is subjected to the same shape memory processing as that of the outer anastomosis member 10 described in the first embodiment. For this reason, the outer anastomosis member 30 (ring-shaped members 32 and 36) is reheated to a predetermined temperature or higher (for example, 60 ° C.), so that the gap g (see FIGS. 7D and 7E) is obtained. The shape can be modified to be narrow.

このように、実施形態2に係る管状組織吻合器具2は、実施形態1に係る管状組織吻合器具1とは、外側吻合部材の構成が異なるが、実施形態1に係る管状組織吻合器具1の場合と同様に、血管を吻合するにあたり、血管に対して外側及び内側吻合部材30,20を配置した後、形状記憶性能を備える外側吻合部材30(リング状部材32,36)を所定温度以上に再び加熱するだけでよいことから、縫合糸で血管を縫合するといった非常に煩雑な作業を行わなくてよい。その結果、手術効率を大幅に向上することが可能となるとともに、術者の手技レベルへの依存度を極力低くすることが可能となる。
また、実施形態2に係る管状組織吻合器具2によれば、血管の外面側に配置されるリング状部材32,36が、一方側の開口端33,37から他方側の開口端34,38に向けて側面の一部が削除された形状(C字状)であるため、実施形態1に係る管状組織吻合器具1の場合と同様の理由により、血管外周面の表層部に存在する細胞が壊死するのを抑制することが可能となる。
したがって、実施形態2に係る管状組織吻合器具2は、手術効率を大幅に向上することが可能で、かつ、術者の手技レベルへの依存度を極力低くすることを可能としつつ、血管外周面の表層部に存在する細胞の壊死を抑制することが可能な管状組織吻合器具となる。
As described above, the tubular tissue anastomosis instrument 2 according to the second embodiment is different from the tubular tissue anastomosis instrument 1 according to the first embodiment in the configuration of the outer anastomosis member, but the tubular tissue anastomosis instrument 1 according to the first embodiment. Similarly, when anastomosing blood vessels, the outer and inner anastomosis members 30 and 20 are arranged with respect to the blood vessels, and then the outer anastomosis members 30 (ring-shaped members 32 and 36) having shape memory performance are again raised to a predetermined temperature or higher. Since only heating is required, it is not necessary to perform a very complicated operation such as suturing a blood vessel with a suture thread. As a result, the surgical efficiency can be greatly improved, and the degree of dependence on the operator's technique level can be reduced as much as possible.
Further, according to the tubular tissue anastomosis instrument 2 according to the second embodiment, the ring-shaped members 32 and 36 disposed on the outer surface side of the blood vessel are changed from the opening ends 33 and 37 on one side to the opening ends 34 and 38 on the other side. Because of the shape (C-shape) from which a part of the side surface is deleted, the cells existing in the surface layer portion of the outer peripheral surface of the blood vessel are necrotic for the same reason as in the case of the tubular tissue anastomosis instrument 1 according to the first embodiment. It is possible to suppress this.
Therefore, the tubular tissue anastomosis instrument 2 according to Embodiment 2 can greatly improve the surgical efficiency, and can reduce the dependence on the operator's technique level as much as possible, while the outer peripheral surface of the blood vessel. It becomes a tubular tissue anastomosis instrument capable of suppressing the necrosis of cells present in the surface layer portion of.

実施形態2に係る管状組織吻合器具2においては、外側吻合部材30は、2つのリング状部材32,36からなり、2つのリング状部材32,36のそれぞれは、一方側の開口端33,37から他方側の開口端34,38に向けて側面の一部が削除された形状(C字状)である。また、2つのリング状部材32,36を吻合対象部分に配置したときの、隣り合うリング状部材の当該削除された部分の位置は、周方向に沿って所定量(例えば180度)ずれている。これにより、血管に望ましくない応力が加わったとしても外側吻合部材30(リング状部材32,36)が外れにくくなるため、吻合力の強い管状組織吻合器具となる。   In the tubular tissue anastomosis instrument 2 according to the second embodiment, the outer anastomosis member 30 includes two ring-shaped members 32 and 36, and the two ring-shaped members 32 and 36 are open ends 33 and 37 on one side, respectively. A shape (C-shape) in which a part of the side surface is deleted from the opening side to the opening ends 34 and 38 on the other side. Further, when the two ring-shaped members 32 and 36 are arranged in the anastomosis target portion, the position of the deleted portion of the adjacent ring-shaped members is shifted by a predetermined amount (for example, 180 degrees) along the circumferential direction. . Thereby, even if an undesirable stress is applied to the blood vessel, the outer anastomosis member 30 (ring-shaped members 32 and 36) is difficult to come off, so that the tubular tissue anastomosis instrument having a strong anastomosis force is obtained.

実施形態2に係る管状組織吻合器具2においては、リング状部材32,36は、削除された部分の位置が管軸2axを中心として点対称となるように配置されている。これにより、外側吻合部材30(リング状部材32,36)がより外れにくくなるため、吻合力をより強くすることが可能となる。また、上記のように構成することにより、リング状部材32とリング状部材36との間の領域の表層部に対して血液を満遍なく行き渡らせることが可能となるため、血管外周面の表層部に存在する細胞の壊死をさらに抑制することが可能となる。   In the tubular tissue anastomosis instrument 2 according to Embodiment 2, the ring-shaped members 32 and 36 are arranged so that the positions of the deleted portions are point-symmetric about the tube axis 2ax. As a result, the outer anastomosis member 30 (ring-shaped members 32 and 36) is less likely to come off, and the anastomosis force can be further increased. Moreover, since it becomes possible to spread the blood uniformly over the surface layer portion in the region between the ring-shaped member 32 and the ring-shaped member 36 by configuring as described above, the surface layer portion on the outer peripheral surface of the blood vessel is formed. It becomes possible to further suppress necrosis of existing cells.

実施形態2に係る管状組織吻合器具2は、外側吻合部材の構成が異なる点以外では、実施形態1に係る管状組織吻合器具1と同様の構成を有するため、実施形態1に係る管状組織吻合器具1が有する効果のうち該当する効果をそのまま有する。   Since the tubular tissue anastomosis instrument 2 according to the second embodiment has the same configuration as the tubular tissue anastomosis instrument 1 according to the first embodiment except that the configuration of the outer anastomosis member is different, the tubular tissue anastomosis instrument according to the first embodiment. 1 has the corresponding effect as it is.

以上、本発明の管状組織吻合器具を上記の各実施形態に基づいて説明したが、本発明は上記の各実施形態に限定されるものではなく、その要旨を逸脱しない範囲において種々の態様において実施することが可能であり、例えば次のような変形も可能である。   As mentioned above, although the tubular tissue anastomosis instrument of the present invention has been described based on each of the above embodiments, the present invention is not limited to each of the above embodiments, and can be implemented in various modes without departing from the gist thereof. For example, the following modifications are possible.

(1)上記各実施形態においては、外側吻合部材のみ所定の形状記憶処理が施され、かつ、当該外側吻合部材が収縮変形する場合を例示して説明したが、本発明はこれに限定されるものではない。
図8は、実施形態1の変形例1〜4に係る管状組織吻合器具1a〜1dを説明するために示す図である。図8(a−1)及び図8(a−2)は変形例1に係る管状組織吻合器具1aを説明するために示す側面断面図であり、図8(b−1)及び図8(b−2)は変形例2に係る管状組織吻合器具1bを説明するために示す側面断面図であり、図8(c−1)及び図8(c−2)は変形例3に係る管状組織吻合器具1cを説明するために示す側面断面図であり、図8(d−1)及び図8(d−2)は変形例4に係る管状組織吻合器具1dを説明するために示す側面断面図である。なお、図8(a−1)〜図8(d−1)は所定温度以上に再加熱する前の状態を図示しており、図8(a−2)〜図8(d−2)は所定温度以上に再加熱した後の状態を図示している。また、図8(a−1)〜図8(d−1)に示す白矢印は、各吻合部材の拡張又は収縮を表すものであり、その矢印の大きさは、拡張又は収縮する力(拡張度合い又は収縮度合い)を模式的に表すものである。
変形例1に係る管状組織吻合器具1aにおいては、図8(a−1)及び図8(a−2)に示すように、外側吻合部材10aには所定の形状記憶処理が施されておらず、内側吻合部材20aに所定の形状記憶処理が施されている。内側吻合部材20aは、所定温度以上に再加熱することにより、外側吻合部材10aと内側吻合部材20aとの隙間を狭くするようにその形状を拡張変形可能に構成されている。
変形例2に係る管状組織吻合器具1bにおいては、図8(b−1)及び図8(b−2)に示すように、外側及び内側吻合部材10b,20bの両方に所定の形状記憶処理が施されている。外側吻合部材10bは、所定温度以上に再加熱することにより、外側吻合部材10bと内側吻合部材20bとの隙間を狭くするようにその形状を収縮変形可能に構成されている。内側吻合部材20bは、所定温度以上に再加熱することにより、外側吻合部材10bと内側吻合部材20bとの隙間を狭くするようにその形状を拡張変形可能に構成されている。
変形例3に係る管状組織吻合器具1cにおいては、図8(c−1)及び図8(c−2)に示すように、外側及び内側吻合部材10c,20cの両方に所定の形状記憶処理が施されている。外側吻合部材10cは、所定温度以上に再加熱することにより、外側吻合部材10cと内側吻合部材20cとの隙間を広くする方向に向けてその形状を拡張変形可能に構成されている。内側吻合部材20cは、所定温度以上に再加熱することにより、外側吻合部材10cと内側吻合部材20cとの隙間を狭くするようにその形状を拡張変形可能に構成されている。このとき、内側吻合部材20cは外側吻合部材10cに比べて、その拡張度合いが大きいことから、全体的に見れば外側吻合部材10cと内側吻合部材20cとの隙間は狭くなることとなる。
変形例4に係る管状組織吻合器具1dにおいては、図8(d−1)及び図8(d−2)に示すように、外側及び内側吻合部材10d,20dの両方に所定の形状記憶処理が施されている。外側吻合部材10dは、所定温度以上に再加熱することにより、外側吻合部材10dと内側吻合部材20dとの隙間を狭くするようにその形状を収縮変形可能に構成されている。内側吻合部材20dは、所定温度以上に再加熱することにより、外側吻合部材10dと内側吻合部材20dとの隙間を広くする方向に向けてその形状を収縮変形可能に構成されている。このとき、外側吻合部材10dは内側吻合部材20dに比べて、その収縮度合いが大きいことから、全体的に見れば外側吻合部材10dと内側吻合部材20dとの隙間は狭くなることとなる。
変形例1〜4に係る管状組織吻合器具1a〜1dに示すように各吻合部材が構成されている場合であっても、2つの血管V1,V2を吻合することができる。
なお、変形例2に係る管状組織吻合器具1bの場合においては、外側吻合部材10bが、上記のように収縮変形可能に構成されており、内側吻合部材20bが、上記のように拡張変形可能に構成されているため、外側及び内側吻合部材10c,20cを所定温度に再加熱したときに、外側及び内側吻合部材10c,20cと血管V1,V2との間に発生する挟持力をより強くすることが可能となる。その結果、吻合力の強い管状組織吻合器具となる。
ここで示す変形例1〜4は実施形態1の変形例であるが、実施形態2の場合(外側吻合部材が複数のリング状部材からなる場合)についても変形例1〜4と同様の変形が可能である。
(1) In each of the above embodiments, only the outer anastomosis member is subjected to predetermined shape memory processing and the outer anastomosis member is contracted and deformed. However, the present invention is limited to this. It is not a thing.
FIG. 8 is a diagram illustrating the tubular tissue anastomosis instruments 1a to 1d according to the first to fourth modifications of the first embodiment. FIGS. 8 (a-1) and 8 (a-2) are side cross-sectional views for explaining the tubular tissue anastomosis instrument 1a according to the first modification, and FIGS. 8 (b-1) and 8 (b). 2) is a side cross-sectional view for explaining the tubular tissue anastomosis instrument 1b according to the second modification, and FIGS. 8 (c-1) and 8 (c-2) are tubular tissue anastomoses according to the third modification. FIG. 8 (d-1) and FIG. 8 (d-2) are side cross-sectional views shown to explain the tubular tissue anastomosis device 1d according to the modified example 4. is there. 8 (a-1) to FIG. 8 (d-1) illustrate a state before reheating to a predetermined temperature or higher, and FIG. 8 (a-2) to FIG. 8 (d-2) are illustrated. The state after reheating above predetermined temperature is illustrated. Moreover, the white arrow shown to FIG. 8 (a-1)-FIG.8 (d-1) represents expansion or contraction of each anastomosis member, The magnitude | size of the arrow is the force (expansion) which expands or contracts Degree or degree of shrinkage).
In the tubular tissue anastomosis instrument 1a according to the modified example 1, as shown in FIGS. 8A-1 and 8A-2, the outer anastomosis member 10a is not subjected to a predetermined shape memory process. The inner anastomosis member 20a is subjected to a predetermined shape memory process. The shape of the inner anastomosis member 20a can be expanded and deformed so as to narrow the gap between the outer anastomosis member 10a and the inner anastomosis member 20a by reheating to a predetermined temperature or higher.
In the tubular tissue anastomosis instrument 1b according to the modified example 2, as shown in FIGS. 8 (b-1) and 8 (b-2), both the outer and inner anastomosis members 10b and 20b are subjected to predetermined shape memory processing. It has been subjected. The outer anastomosis member 10b is configured such that its shape can be contracted and deformed so as to narrow the gap between the outer anastomosis member 10b and the inner anastomosis member 20b by reheating to a predetermined temperature or higher. The inner anastomosis member 20b is configured such that its shape can be expanded and deformed so as to narrow the gap between the outer anastomosis member 10b and the inner anastomosis member 20b by reheating to a predetermined temperature or higher.
In the tubular tissue anastomosis instrument 1c according to the modified example 3, as shown in FIGS. 8 (c-1) and 8 (c-2), both the outer and inner anastomosis members 10c and 20c are subjected to predetermined shape memory processing. It has been subjected. The outer anastomosis member 10c is configured such that its shape can be expanded and deformed in the direction of widening the gap between the outer anastomosis member 10c and the inner anastomosis member 20c by reheating to a predetermined temperature or higher. The inner anastomosis member 20c is configured such that its shape can be expanded and deformed so as to narrow the gap between the outer anastomosis member 10c and the inner anastomosis member 20c by reheating to a predetermined temperature or higher. At this time, since the expansion degree of the inner anastomosis member 20c is larger than that of the outer anastomosis member 10c, the gap between the outer anastomosis member 10c and the inner anastomosis member 20c becomes narrow as a whole.
In the tubular tissue anastomosis instrument 1d according to the modified example 4, as shown in FIGS. 8 (d-1) and 8 (d-2), both the outer and inner anastomosis members 10d and 20d are subjected to predetermined shape memory processing. It has been subjected. The outer anastomosis member 10d is configured such that its shape can be contracted and deformed so as to narrow the gap between the outer anastomosis member 10d and the inner anastomosis member 20d by reheating to a predetermined temperature or higher. The inner anastomosis member 20d is configured so that its shape can be contracted and deformed in the direction of widening the gap between the outer anastomosis member 10d and the inner anastomosis member 20d by reheating to a predetermined temperature or higher. At this time, since the contraction degree of the outer anastomosis member 10d is larger than that of the inner anastomosis member 20d, the gap between the outer anastomosis member 10d and the inner anastomosis member 20d becomes narrow as a whole.
Even if each anastomosis member is configured as shown in the tubular tissue anastomosis instruments 1a to 1d according to the first to fourth modifications, the two blood vessels V1 and V2 can be anastomosed.
In the case of the tubular tissue anastomosis instrument 1b according to the second modification, the outer anastomosis member 10b is configured to be contractible and deformable as described above, and the inner anastomosis member 20b can be expanded and deformed as described above. Since it is configured, when the outer and inner anastomosis members 10c and 20c are reheated to a predetermined temperature, the clamping force generated between the outer and inner anastomosis members 10c and 20c and the blood vessels V1 and V2 is made stronger. Is possible. As a result, a tubular tissue anastomosis instrument having a strong anastomosis force is obtained.
Modified examples 1 to 4 shown here are modified examples of the first embodiment. However, in the case of the second embodiment (when the outer anastomosis member is composed of a plurality of ring-shaped members), the same modification as the modified examples 1 to 4 is performed. Is possible.

(2)上記各実施形態においては、外側及び内側吻合部材は、側面(管壁部分)に孔が設けられていない構造(側面が平らな構造)であるが、本発明はこれに限定されるものではなく、側面(管壁部分)に複数の孔が設けられた構造であってもよい。この場合、吻合部分の血管に加わる圧力を軽減することができるため、吻合部分の血管の表層部を通る血流が滞ってしまうのを抑制することができ、結果として、吻合部分の細胞が壊死するのをさらに抑制することが可能となる。
側面(管壁部分)に複数の孔が設けられた構造である場合には、例えばメッシュのように、比較的大きな孔が均等に配列されたものであってもよいし、さほど大きくない孔が均等あるいは不均等に配列(配置)されたものであってもよい。
(2) In each of the above embodiments, the outer and inner anastomosis members have a structure in which a hole is not provided in the side surface (tube wall portion) (a structure in which the side surface is flat), but the present invention is limited to this. It may be a structure in which a plurality of holes are provided on the side surface (tube wall portion). In this case, since the pressure applied to the blood vessel at the anastomosis portion can be reduced, the blood flow through the surface layer portion of the blood vessel at the anastomosis portion can be suppressed, and as a result, the cells in the anastomosis portion are necrotized. This can be further suppressed.
In the case of a structure in which a plurality of holes are provided on the side surface (tube wall portion), relatively large holes may be evenly arranged, such as a mesh, or holes that are not so large It may be arranged (arranged) equally or non-uniformly.

(3)上記各実施形態においては、外側吻合部材の切欠き角度θが140度に設定されている場合を例示して説明したが、本発明はこれに限定されるものではない。外側及び内側吻合部材でもって管状組織を吻合したときに、外側吻合部材が外れてしまわない角度であればよく、切欠き角度θが140度よりも大きな角度(例えば180度)に設定されていてもよいし、140度よりも小さな角度(例えば90度)に設定されていてもよい。 (3) In the above embodiments, the case where the notch angle θ of the outer anastomosis member is set to 140 degrees has been described as an example, but the present invention is not limited to this. When the tubular tissue is anastomosed with the outer and inner anastomosis members, the angle may be such that the outer anastomosis member does not come off, and the notch angle θ is set to an angle larger than 140 degrees (for example, 180 degrees). Alternatively, an angle smaller than 140 degrees (for example, 90 degrees) may be set.

(4)上記実施形態1においては、外側吻合部材10の長さが内側吻合部材20の長さよりも短く設定されている場合を例示して説明したが、本発明はこれに限定されるものではなく、外側吻合部材と内側吻合部材が同じ長さであってもよいし、外側吻合部材が内側吻合部材よりも長くてもよい。 (4) In Embodiment 1 described above, the case where the length of the outer anastomosis member 10 is set shorter than the length of the inner anastomosis member 20 has been described as an example, but the present invention is not limited to this. Alternatively, the outer anastomosis member and the inner anastomosis member may be the same length, or the outer anastomosis member may be longer than the inner anastomosis member.

(5)上記実施形態2においては、外側吻合部材として、2つのリング状部材32,36からなる外側吻合部材30を例示して説明したが、本発明はこれに限定されるものではなく、3つ以上のリング状部材からなる外側吻合部材であってもよい。 (5) In the second embodiment, the outer anastomosis member 30 including the two ring-shaped members 32 and 36 has been described as an example of the outer anastomosis member. However, the present invention is not limited to this, and 3 The outer anastomosis member which consists of two or more ring-shaped members may be sufficient.

(6)上記実施形態2においては、各リング状部材32,36の端面が略四角形である場合を例示して説明したが、本発明はこれに限定されるものではなく、端面が略四角形以外の多角形(例えば略六角形など)であるリング状部材であってもよいし、端面が略円形(例えば円形、楕円形など)であるリング状部材であってもよい。 (6) In the second embodiment, the case where the end surfaces of the ring-shaped members 32 and 36 are substantially rectangular has been described as an example. However, the present invention is not limited to this, and the end surfaces are not substantially rectangular. It may be a ring-shaped member having a polygonal shape (for example, a substantially hexagonal shape) or a ring-shaped member having an end surface having a substantially circular shape (for example, a circular shape, an elliptical shape).

(7)上記各実施形態においては、内側吻合部材が、円管である場合を例示して説明したが、本発明はこれに限定されるものではなく、例えば、断面四角形の角管であってもよい。同様に、上記各実施形態においては、外側吻合部材が、円管の側面一部が削除された形状(断面C字状)である場合を例示して説明したが、本発明はこれに限定されるものではなく、例えば、角管の側面一部が削除された形状(断面コの字状)であってもよい。 (7) In each of the above-described embodiments, the case where the inner anastomosis member is a circular tube has been described as an example. However, the present invention is not limited to this, for example, a square tube having a square cross section. Also good. Similarly, in each of the above embodiments, the case where the outer anastomosis member has a shape (C-shaped cross section) from which a part of the side surface of the circular tube is deleted has been described, but the present invention is not limited thereto. For example, it may have a shape (a U-shaped cross section) in which a part of the side surface of the square tube is deleted.

(8)上記各実施形態においては、外側及び内側吻合部材が、脂肪族エステル系樹脂のうち同じ材料で構成されていたが、本発明はこれに限定されるものではなく、外側吻合部材と内側吻合部材とが脂肪族エステル系樹脂のうち異なる材料で構成されていてもよい。 (8) In each of the above embodiments, the outer and inner anastomosis members are made of the same material among the aliphatic ester resins, but the present invention is not limited to this, and the outer anastomosis member and the inner anastomosis member The anastomosis member may be made of a different material among the aliphatic ester resins.

(9)上記実施形態1においては、図3に示したように、成形工程S1における成形温度T1が、変形処理工程S2における温度T2よりも高い場合を例示して説明したが、本発明はこれに限定されるものではない。外側吻合部材の材料として、「ポリ乳酸−ポリグリコール酸−ポリεカプロラクトンの共重合体」以外の脂肪族エステル系樹脂を用いた場合には、成形温度T1と温度T2とが同じとなる可能性もあるし、成形温度T1が温度T2よりも低くなる可能性もある。ただし、この場合においても、成形温度T1及び温度T2は、使用する樹脂のガラス転移点Tgよりも高く当該樹脂の融点Tmよりも低い温度となる。 (9) In the first embodiment, as shown in FIG. 3, the case where the molding temperature T1 in the molding step S1 is higher than the temperature T2 in the deformation processing step S2 is described as an example. It is not limited to. When an aliphatic ester resin other than “polylactic acid-polyglycolic acid-polyεcaprolactone copolymer” is used as the material of the outer anastomosis member, the molding temperature T1 and the temperature T2 may be the same. There is also a possibility that the molding temperature T1 is lower than the temperature T2. However, even in this case, the molding temperature T1 and the temperature T2 are higher than the glass transition point Tg of the resin used and lower than the melting point Tm of the resin.

(10)上記各実施形態においては、「成形工程(成形体作製工程)S1」、「変形処理工程S2」及び「形状固定工程S3」を含む方法(図2参照。)によって、外側吻合部材に所定の形状記憶処理を施す場合を例示して説明したが、本発明はこれに限定されるものではなく、これ以外の方法で外側吻合部材(又は内側吻合部材)に所定の形状記憶処理を施してもよい。その場合、脂肪族エステル系樹脂以外の材料であっても形状記憶処理を施すことができるのであれば、脂肪族エステル系樹脂以外の材料(例えば形状記憶合金)を用いてもよい。 (10) In each of the above embodiments, the outer anastomosis member is formed by a method (see FIG. 2) including “molding step (molded body manufacturing step) S1”, “deformation processing step S2”, and “shape fixing step S3”. The case where the predetermined shape memory processing is performed has been described as an example, but the present invention is not limited to this, and the outer shape anastomosis member (or the inner anastomosis member) is subjected to the predetermined shape memory processing by other methods. May be. In that case, a material other than the aliphatic ester resin (for example, a shape memory alloy) may be used as long as the shape memory treatment can be performed even with a material other than the aliphatic ester resin.

(11)上記各実施形態においては、管状組織吻合器具を用いて血管を吻合する場合を例示して説明したが、本発明はこれに限定されるものではなく、血管以外の管状組織(例えば、消化管、胆管、尿管、尿道等)を吻合するために用いてもよいことは言うまでもない。 (11) In each of the embodiments described above, the case where the blood vessel is anastomosed using the tubular tissue anastomosis instrument has been described as an example, but the present invention is not limited to this, and the tubular tissue other than the blood vessel (for example, It goes without saying that the gastrointestinal tract, bile duct, ureter, urethra, etc.) may be used for anastomosis.

1,1a〜1d,2 管状組織吻合器具
1ax,2ax 管軸
10,10a〜10d,30 外側吻合部材
12,14 (外側吻合部材の)開口端
16,18 (外側吻合部材の)側面の端部
20,20a〜20d 内側吻合部材
22,24 (内側吻合部材の)開口端
32,36 リング状部材
33,34,37,38 (リング状部材の)開口端
g (外側吻合部材と内側吻合部材との)隙間
V1,V2 血管
θ 切欠き角度
1, 1a-1d, 2 Tubular tissue anastomosis instrument 1ax, 2ax Tube shaft 10, 10a-10d, 30 Outer anastomosis member 12, 14 Open end 16, 18 (outer anastomosis member) Side end 20, 20a to 20d Inner anastomosis member 22, 24 Open end 32, 36 (inner anastomosis member) Ring-like member 33, 34, 37, 38 Open end g (outer ring-like member) Open end g (outer anastomosis member and inner anastomosis member) Gaps V1, V2 Blood vessel θ Notch angle

Claims (6)

略管状の外側吻合部材(10)と、
前記外側吻合部材(10)との間に所定の隙間(g)を設けるようにして前記外側吻合部材(10)の内側に配置される略管状の内側吻合部材(20)とを備える管状組織吻合器具(1)であって、
当該管状組織吻合器具は、管状組織の吻合対象部分を前記隙間に配置した状態で、前記外側及び内側吻合部材で当該吻合対象部分を挟むように吻合するタイプのものであり、
前記外側及び内側吻合部材(10,20)のうち少なくとも一方の吻合部材は、
所定の形状記憶処理が施され、第1形状から、当該第1形状よりも前記隙間が広くなる第2形状に変形処理された、形状記憶性能を備える部材であって、所定温度以上に再加熱することにより、前記隙間を狭くするように前記第2形状から前記第1形状へと変形可能に構成されており、
前記外側吻合部材(10)は、略管状の一方側の開口端(12)から他方側の開口端(14)に向けて、管壁部分を構成する側面の一部が削除された形状であり、かつ、
前記外側及び内側吻合部材(10,20)のうち少なくとも一方の吻合部材が前記第2形状のとき、前記外側吻合部材(10)の側面の削除された部分を介して管状組織の側方から前記外側吻合部材(10)を取り付けることが可能であることを特徴とする管状組織吻合器具(1)。
A generally tubular outer anastomosis member (10);
Tubular tissue anastomosis comprising a substantially tubular inner anastomosis member (20) disposed inside the outer anastomosis member (10) so as to provide a predetermined gap (g) between the outer anastomosis member (10). An appliance (1),
The tubular tissue anastomosis instrument is of a type that anastomoses so as to sandwich the anastomosis target portion with the outer and inner anastomosis members in a state where the anastomosis target portion of the tubular tissue is disposed in the gap,
At least one of the outer and inner anastomosis members (10, 20) is:
A member having a shape memory performance that has been subjected to a predetermined shape memory process and deformed from the first shape into a second shape in which the gap is wider than the first shape, and is reheated to a predetermined temperature or higher By doing so, it is configured to be deformable from the second shape to the first shape so as to narrow the gap,
The outer anastomosis member (10) has a shape in which a part of the side surface constituting the tube wall portion is removed from the substantially tubular open end (12) to the open end (14) on the other side. And
When at least one of the outer and inner anastomosis members (10, 20) is in the second shape, the lateral anastomosis member (10) is removed from the side of the tubular tissue through the removed portion. tubular tissue anastomosis instrument, wherein it can der Rukoto attaching the outer anastomosis member (10) (1).
請求項1に記載の管状組織吻合器具において、
前記外側吻合部材(30)は、複数のリング状部材(32,36)からなり、
前記複数のリング状部材(32,36)のそれぞれは、リングの一方側の開口端から他方側の開口端に向けて、リングの一部が削除された形状であり、
前記複数のリング状部材(32,36)を前記吻合対象部分に配置したときの、隣り合う前記リング状部材の当該削除された部分の位置は、周方向に沿って所定量ずれていることを特徴とする管状組織吻合器具(2)。
The tubular tissue anastomosis instrument according to claim 1,
The outer anastomosis member (30) comprises a plurality of ring-shaped members (32, 36),
Wherein each of the plurality of ring-shaped member (32, 36), toward the other side of the opening end from the one side of the open end of the ring has a shape in which a part of the ring is removed,
When the plurality of ring-shaped members (32, 36) are arranged in the anastomosis target portion, the positions of the deleted portions of the adjacent ring-shaped members are shifted by a predetermined amount along the circumferential direction. A featured tubular tissue anastomosis instrument (2).
請求項2に記載の管状組織吻合器具において、
前記隣り合うリング状部材(32,36)は、前記削除された部分の位置が管軸(2ax)を中心として点対称となるように配置されていることを特徴とする管状組織吻合器具(2)。
The tubular tissue anastomosis instrument according to claim 2,
The adjacent ring-shaped members (32, 36) are arranged so that the positions of the deleted portions are point-symmetrical about the tube axis (2ax) (2) ).
請求項1〜3のいずれか一項に記載の管状組織吻合器具において、
前記外側及び内側吻合部材のうち前記所定の形状記憶処理が施されたほうの吻合部材(10)は、
脂肪族エステル系樹脂を、所定の成形温度に加熱して第1形状に成形し、当該第1形状からなる成形体を前記樹脂のガラス転移点よりも高く前記樹脂の融点よりも低い温度で第2形状に変形処理し、当該変形処理された前記第2形状からなる中間体を前記樹脂のガラス転移点よりも低い温度に冷却して前記第2形状に形状固定することにより形成された、形状記憶性能を備えるものであり、かつ、
所定温度以上に再加熱することにより、前記隙間を狭くするように前記第2形状から前記第1形状へと変形可能に構成されていることを特徴とする管状組織吻合器具(1)。
In the tubular tissue anastomosis instrument according to any one of claims 1 to 3,
Of the outer and inner anastomosis members, the anastomosis member (10) subjected to the predetermined shape memory processing is:
The aliphatic ester-based resin is heated to a predetermined molding temperature to be molded into a first shape, and a molded body having the first shape is obtained at a temperature higher than the glass transition point of the resin and lower than the melting point of the resin. A shape formed by deforming into two shapes, cooling the deformed intermediate body having the second shape to a temperature lower than the glass transition point of the resin, and fixing the shape to the second shape. It has storage performance, and
A tubular tissue anastomosis instrument (1) configured to be deformable from the second shape to the first shape so as to narrow the gap by reheating to a predetermined temperature or higher.
請求項4に記載の管状組織吻合器具において、
前記外側及び内側吻合部材(10b,20b)はともに、脂肪族エステル系樹脂から構成された前記形状記憶性能を備えるものであり、
前記外側吻合部材(10b)は、所定温度以上に再加熱することにより、前記隙間を狭くするように前記第2形状から前記第1形状へと収縮変形可能に構成されており、
前記内側吻合部材(20b)は、所定温度以上に再加熱することにより、前記隙間を狭くするように前記第2形状から前記第1形状へと拡張変形可能に構成されていることを特徴とする管状組織吻合器具(1b)。
The tubular tissue anastomosis instrument according to claim 4,
Both the outer and inner anastomosis members (10b, 20b) are provided with the shape memory performance composed of an aliphatic ester resin,
The outer anastomosis member (10b) is configured to be able to shrink and deform from the second shape to the first shape so as to narrow the gap by reheating to a predetermined temperature or higher,
The inner anastomosis member (20b) can be expanded and deformed from the second shape to the first shape so as to narrow the gap by reheating to a predetermined temperature or higher. Tubular tissue anastomosis instrument (1b).
請求項1〜5のいずれか一項に記載の管状組織吻合器具において、
前記外側及び内側吻合部材のうち少なくとも一方の吻合部材は、複数の孔が設けられた構造を有することを特徴とする管状組織吻合器具。
In the tubular tissue anastomosis instrument according to any one of claims 1 to 5,
A tubular tissue anastomosis instrument characterized in that at least one of the outer and inner anastomosis members has a structure provided with a plurality of holes.
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US4470415A (en) * 1982-08-19 1984-09-11 The Johns Hopkins University Sutureless vascular anastomosis means and method
JPS6472737A (en) * 1987-09-14 1989-03-17 Nippon Medical Supply Anastomosis auxiliary device for hollow organ
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JP2003275215A (en) * 2002-03-27 2003-09-30 National Cardiovascular Center Living body tract joining material
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