JPH08332218A - Artificial blood vessel - Google Patents

Artificial blood vessel

Info

Publication number
JPH08332218A
JPH08332218A JP14211095A JP14211095A JPH08332218A JP H08332218 A JPH08332218 A JP H08332218A JP 14211095 A JP14211095 A JP 14211095A JP 14211095 A JP14211095 A JP 14211095A JP H08332218 A JPH08332218 A JP H08332218A
Authority
JP
Japan
Prior art keywords
blood vessel
artificial blood
elastomer
intermediate layer
layer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP14211095A
Other languages
Japanese (ja)
Other versions
JP3229776B2 (en
Inventor
Yuzo Ezaki
祐造 江崎
Hiroki Oharai
裕樹 小原井
Koichi Fujita
浩一 藤田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Terumo Corp
Original Assignee
Terumo Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Terumo Corp filed Critical Terumo Corp
Priority to JP14211095A priority Critical patent/JP3229776B2/en
Priority to US08/637,478 priority patent/US5904967A/en
Priority to EP19960400903 priority patent/EP0742021B1/en
Priority to DE69618271T priority patent/DE69618271T2/en
Publication of JPH08332218A publication Critical patent/JPH08332218A/en
Application granted granted Critical
Publication of JP3229776B2 publication Critical patent/JP3229776B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Materials For Medical Uses (AREA)

Abstract

PURPOSE: To provide an artificial blood vessel using a blood access by using a polyester group porous resin material for an inner layer, and a material in which an isoprene derivative is blended in styrene group elastomer/olefin group elastomer, for an intermediate layer. CONSTITUTION: An artificial blood vessel 1 has a non-porous intermediate layer between porous inner and outer layers 2, 4. The inner layer 2 is made of a polyester group resin porous material, and the intermediate layer 3 is made of a stinging-resistant material in which 20 weight parts of isoprene derivative is blended in 100 weight parts of styrene group elastomer and/or olefine group elastomer. Further, further, the inner layer 2 is made of a fiber structure in which composite fibers made of polyethylene telephthalate and polybutyl telephthalate are braided, woven and assembled, the intermediate layer 3 is made of a stinging-resistant material in which 20 weight parts of isoprene derivative is blended in 100 weight parts of styrene group elastomer, and the outer layer is made of unwoven fabric made of olefin group elastomer.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、人工血管に関するもの
である。
FIELD OF THE INVENTION The present invention relates to an artificial blood vessel.

【0002】[0002]

【従来の技術およびその問題点】現在人工透析などで動
静脈吻合による内シャント術を行うことが一般的である
が、動静脈の損傷などにより内シャント術を行うことが
できなくなった患者にはテフロン製の人工血管など移植
して用いることが多い。しかしながらこのような人工血
管を人工透析などの頻度に穿刺が行なわれる部位に使用
すると、人工血管から血液が漏れて、瘤や血腫の形成、
石灰化などの問題が発生することが報告されている。ま
た従来の人工血管は生体血管と物性が大きく異なるため
に生体血管に吻合した場合に吻合部位が肥厚してしまう
問題も生じている。さらに縫合時に針穴からの出血も問
題となっている。
2. Description of the Related Art Currently, it is common to perform internal shunting by arteriovenous anastomosis with artificial dialysis etc., but for patients who cannot perform internal shunting due to arteriovenous damage or the like. It is often used by transplanting an artificial blood vessel made of Teflon. However, if such an artificial blood vessel is used at a site where puncture is performed frequently such as artificial dialysis, blood leaks from the artificial blood vessel, forming aneurysm or hematoma,
It has been reported that problems such as calcification occur. In addition, since the conventional artificial blood vessel has greatly different physical properties from the living blood vessel, there is a problem that the anastomosis site is thickened when it is anastomosed to the living blood vessel. Furthermore, bleeding from the needle hole during suturing is also a problem.

【0003】[0003]

【発明が解決しようとしている課題】本発明は、上記問
題点を鑑みてブラッドアクセスの使用を目的とした人工
血管を提供することを目的とする。さらに詳しくは、穿
刺針や留置針などの医療用針の頻回の穿刺に対する穿刺
耐性、及び吻合する生体血管や周辺組織に対する適合性
に優れた人工血管を提供することを目的とする。
SUMMARY OF THE INVENTION In view of the above problems, it is an object of the present invention to provide an artificial blood vessel intended for blood access use. More specifically, it is an object of the present invention to provide an artificial blood vessel having excellent puncture resistance against frequent punctures of medical needles such as puncture needles and indwelling needles, and excellent compatibility with living blood vessels and peripheral tissues to be anastomosed.

【0004】[0004]

【課題を解決するための手段】上記の課題を解決する本
発明は、図1にその断面図を示す多孔質の内層2と外層
4との間に無孔質の中間層3を有する人工血管1であ
り、内層がポリエステル系樹脂多孔体、中間層がスチレ
ン系エラストマー及び/又はオレフィン系エラストマー
100重量部に対してイソプレン誘導体を20重量部以
上配合した材料からなる穿刺耐性体であることを特徴と
する人工血管である。さらには、内層がポリエチレンテ
レフタレートとポリブチレンテレフタレートの複合繊維
を編み、織り、組み処理を行った繊維構造体、中間層が
スチレン系エラストマー100重量部に対してイソプレ
ン誘導体を20重量部以上配合した材料からなる穿刺耐
性体、外層がオレフィン系エラストマー不織布からなる
ことを特徴とする人工血管である。
The present invention for solving the above-mentioned problems is an artificial blood vessel having a non-porous intermediate layer 3 between a porous inner layer 2 and an outer layer 4, the cross-sectional view of which is shown in FIG. 1, wherein the inner layer is a porous polyester resin body, and the intermediate layer is a puncture resistant body made of a material in which 20 parts by weight or more of an isoprene derivative is mixed with 100 parts by weight of a styrene elastomer and / or an olefin elastomer. It is an artificial blood vessel. Furthermore, the inner layer is a fibrous structure obtained by knitting, weaving, and assembling composite fibers of polyethylene terephthalate and polybutylene terephthalate, and the intermediate layer is a material in which 20 parts by weight or more of the isoprene derivative is mixed with 100 parts by weight of the styrene elastomer. The artificial blood vessel is characterized in that it has a puncture resistance and an outer layer is made of an olefin elastomer nonwoven fabric.

【0005】本発明において内層をポリエステル系樹脂
多孔体とすることにより、耐圧強度の向上や新生内膜の
固着を可能にすることができる。本発明の内層に用いる
ポリエステル系樹脂としては、ポリエチレンテレフタレ
ート(PET)、ポリブチレンテレフタレート(PB
T)、ポリエステル−ポリエーテルブロック共重合体、
ポリエステル−ポリエステルブロック重合体等を用いる
ことができる。また内層の多孔体の構造としては、ポリ
エステル系樹脂の繊維を編み、織り、組み等の処理、よ
り詳しくはたて編み、よこ編み、三軸編み、袋織り、組
紐などが例示できるが、何らこれらに限定されず、これ
らのいずれかまたはこれらの2つ以上を併用することに
より得られ、該繊維間の隙間が孔に相当する繊維構造体
や不織布などが挙げられる。さらに多孔体の構造として
は、上記ポリエステル系樹脂により所望の形状に一体成
形した成形体を熱処理後延伸しさらに熱処理することで
多孔体を成形する延伸法、または該成形体を成形する際
に一緒に充填剤を含有して成形し成形後に該充填剤のみ
を溶解しうる溶剤等を用いて抽出分離することにより多
孔体を成形する溶剤抽出法などにより得ることもでき
る。
In the present invention, when the inner layer is made of a polyester resin porous material, it is possible to improve the pressure resistance and to fix the neointima. Examples of the polyester resin used in the inner layer of the present invention include polyethylene terephthalate (PET) and polybutylene terephthalate (PB).
T), a polyester-polyether block copolymer,
A polyester-polyester block polymer or the like can be used. Examples of the structure of the inner layer porous body include knitting, weaving, and braiding of polyester resin fibers, more specifically, warp knitting, weft knitting, triaxial knitting, bag weaving, and braids. The present invention is not limited to these, and examples thereof include a fibrous structure and a non-woven fabric, which are obtained by using any one of these or two or more thereof together and in which the gaps between the fibers correspond to pores. Further, as the structure of the porous body, a stretching method in which a molded body integrally molded in a desired shape with the above polyester resin is heat-treated and then stretched and further heat-treated to form a porous body, or a method for molding the molded body is used. It can also be obtained by a solvent extraction method or the like in which a porous body is molded by containing the above-mentioned filler in the molding and molding and separating after the molding using a solvent or the like capable of dissolving only the filler.

【0006】また上記の多孔体をポリエステル系樹脂の
繊維を用いて構成する場合、該繊維はモノフィラメント
繊維に限定されるものではなく、2成分以上のポリエス
テル系樹脂を同時に紡糸した複合繊維を用いてもよい。
複合繊維の複合の仕方は特に限定されず、例えば、接合
型(2成分以上が張り合わされた状態で接合されたも
の)、芯鞘型(1成分を芯として他成分がこれを取り囲
んだもの)、多芯鞘型(1成分を多数の芯層として成形
として他成分がこれを取り囲んだもの)、多層接合型
(2成分が交互に接合された形式で多層を成形したも
の)などが挙げられるが、弾性および弾性回復性の保持
などから接合型が好ましい。また該繊維は弾性回復性の
改良を目的に繊維化を行ったものが好ましく、必要に応
じて繊維を成形後に潜在捲縮性を付与させたものが多孔
体の安定化のため好ましい。本発明においては、PET
とPBTを同時に紡糸した接合型の複合繊維を編み、織
り、組み処理を行った繊維構造体を用いることが好まし
い。
When the above-mentioned porous body is formed by using fibers of polyester resin, the fibers are not limited to monofilament fibers, and composite fibers obtained by simultaneously spinning two or more polyester resins are used. Good.
The method of conjugating the composite fibers is not particularly limited, and examples thereof include a joint type (joined in a state in which two or more components are bonded together), a core-sheath type (one component having a core surrounding the other component) , Multi-core sheath type (one component is formed into a number of core layers with other components surrounding it), multi-layer joining type (multi-layer formed by alternately joining two components) and the like. However, the joint type is preferable from the standpoint of maintaining elasticity and elastic recovery. The fiber is preferably fiberized for the purpose of improving elastic recovery, and is preferably a fiber to which latent crimping property is imparted after the fiber is formed, in order to stabilize the porous body. In the present invention, PET
It is preferable to use a fibrous structure obtained by knitting, weaving, and braiding joint-type composite fibers obtained by simultaneously spinning and PBT.

【0007】また上記の多孔体がポリエステル系樹脂の
繊維を用いて構成する場合、該繊維は嵩高処理が行われ
ていることが好ましい。嵩高処理としては、加撚し、熱
固定して解撚する方法、連続して加撚−熱固定−解撚す
る仮撚り法、糸を一定容積内へ押し込み熱処理を行いな
がら取り出す押し込み法、加熱した繊維をこする擦過
法、高温高圧のエアーで糸を衝突体に打ち当てて巻縮を
付与する空気噴射法および一対の加熱ギアの間に糸を通
過させて歯型を糸に付与する賦形法などの公知の方法を
用いることができる。
When the above-mentioned porous body is composed of polyester resin fibers, it is preferable that the fibers have been subjected to a bulking treatment. As the bulkiness treatment, a method of twisting, heat setting and untwisting, a false twisting method of continuously twisting, heat setting, and untwisting, a pushing method in which a yarn is pushed into a certain volume while being heat treated, and a heating is performed. The rubbing method for rubbing the fibers, the air jetting method for applying crimp by hitting the yarn with a high-temperature and high-pressure air to the colliding body, and the process for passing the yarn between the pair of heating gears and imparting the tooth profile to the yarn. A known method such as a shaping method can be used.

【0008】さらに上記のポリエステル系樹脂の繊維の
太さは、通常20〜150デニール、好ましくは20〜
75デニール、より好ましくは20〜50デニールであ
る。該ポリエステル系樹脂の繊維の太さが150デニー
ルを越える場合には、多孔体の壁厚が厚くなりすぎて柔
軟性が損なわれ、20デニール未満の場合には強度的に
不十分になる虞れがある。
Further, the fiber thickness of the above polyester resin is usually 20 to 150 denier, preferably 20 to 150 denier.
It is 75 denier, more preferably 20 to 50 denier. If the fiber diameter of the polyester resin exceeds 150 denier, the wall thickness of the porous body becomes too thick and the flexibility is impaired. If it is less than 20 denier, the strength may be insufficient. There is.

【0009】本発明において中間層をスチレン系エラス
トマー及び/又はオレフィン系エラストマー100重量
部に対してイソプレン誘導体を20重量部以上配合した
材料からなる穿刺耐性体とすることにより、ゴム弾性に
富み、穿刺針や留置針などの医療用針の頻回の穿刺に対
する穿刺耐性に優れ、また人工血管移植初期や医療用針
の穿刺時の血漿漏出を防ぐことができる。
In the present invention, the intermediate layer is a puncture resistant body made of a material in which 20 parts by weight or more of the isoprene derivative is mixed with 100 parts by weight of the styrene-based elastomer and / or the olefin-based elastomer. It excels in puncture resistance against frequent punctures of medical needles such as needles and indwelling needles, and can prevent plasma leakage at the initial stage of artificial blood vessel transplantation and when puncturing medical needles.

【0010】本発明の中間層に用いるスチレン系エラス
トマーとしては、スチレンおよび/またはエチレンを主
成分とする部分と、ブタジエンおよび/またはイソプレ
ンおよび/またはそれらの水素添加物からなる部分から
構成された共重合体を主成分とするものである。具体的
には、市販されているもので、クレイトン,カリフレッ
クス(シェル化学)、タフプレン,タフテック(旭化成
工業)、アロンAR(アロン化成)、ラバロン(三菱油
化)、JSR−TR,JSR−SIS,ダイナロン(日
本合成ゴム)、セプトン(クラレ)などが挙げられる。
また、オレフィン系エラストマーは、エチレンとプロピ
レンの共重合体や、それに第三成分としてα−オレフィ
ンやジエンモノマーを添加したものなどで、具体的に
は、ミラストマー,タフマー(三井石油化学)、住友T
PE(住友化学工業)、サーモラン(三菱油化)などが
挙げられる。
The styrenic elastomer used in the intermediate layer of the present invention is a copolymer composed of a portion containing styrene and / or ethylene as a main component and a portion containing butadiene and / or isoprene and / or hydrogenated products thereof. It is mainly composed of a polymer. Specifically, they are commercially available, such as Clayton, Califlex (Shell Chemical), Tufrene, Tuftec (Asahi Kasei), Aron AR (Aron Kasei), Lavalon (Mitsubishi Yuka), JSR-TR, JSR-SIS. , Dynaron (Japan Synthetic Rubber), Septon (Kuraray), etc.
Further, the olefin elastomer is a copolymer of ethylene and propylene, or one in which α-olefin or a diene monomer is added as a third component, and specifically, Mirastomer, Tuffmer (Mitsui Petrochemical), Sumitomo T
Examples include PE (Sumitomo Chemical Co., Ltd.) and Thermoran (Mitsubishi Yuka).

【0011】さらにイソプレン誘導体をスチレン系エラ
ストマー及び/又はオレフィン系エラストマー100重
量部に対して20重量部以上混合させると硬度の低下、
および強張り伸度の向上がえられる。イソプレン誘導体
としては、特に限定しないがスクアラン、スクアレンが
好ましく使用でき、それは天然物でも、天然物からの誘
導体でも、化学合成で得られた物でも構わない。他に
も、ゲラニルゲラン酸、ゲラニルゲラニオール、ゲラニ
ルリナルール、イソフィトール、フィトール、フィチル
アセテート、ヘキサハイドロファルニシルアセトン、フ
ァルニシルアセトン、ネロリドール、ファルネセン、ビ
サボレン、ビサボロール、ファルネソール、ゲファルネ
ート、ファルネサール、ファルネシル酸、ゲラニルアセ
トン、シュードイオノン、α−ロノン、β−ロノン、α
−メチルイオノン、γ−メチルイオノンなどが挙げられ
る。これらのイソプレン誘導体は、ヒトの体内に代謝経
路があるため、医療用材料として使用中にブリードなど
により体内に吸収されても、安全性が高い。
Further, if 20 parts by weight or more of the isoprene derivative is mixed with 100 parts by weight of the styrene elastomer and / or the olefin elastomer, the hardness is lowered,
And the tensile elongation can be improved. The isoprene derivative is not particularly limited, but squalane or squalene can be preferably used, and it may be a natural product, a derivative from a natural product, or a product obtained by chemical synthesis. Besides, geranylgeranic acid, geranylgeraniol, geranyl linalool, isophytol, phytol, phytyl acetate, hexahydrofarnicylacetone, farnicylacetone, nerolidol, farnesene, bisabolen, bisabolol, farnesol, gefarnate, farnesal, farnesyl. Acid, geranylacetone, pseudoionone, α-ronone, β-ronone, α
Examples include -methylionone and γ-methylionone. Since these isoprene derivatives have metabolic pathways in the human body, they are highly safe even if they are absorbed into the body by bleeding during use as a medical material.

【0012】中間層の多孔体の構造は無孔質体であり、
上記のエラストマーを常法によってシート状、例えば、
熱プレス機によってシート状にすることによって得られ
る。また管状構造体として得るときは、シート状に成形
したものを芯棒に巻き付け熱処理する方法や、一般的な
押し出し成形、コンプレーション成形等により得られる
物などを使用できる。本発明の中間層の最も好ましい形
態としては、スチレン系エラストマー100重量部に対
してイソプレン誘導体を20重量部以上混合したエラス
トマーを常法によってシート状した物が挙げられる。
The structure of the porous body of the intermediate layer is a non-porous body,
The above elastomer is formed into a sheet by a conventional method, for example,
It is obtained by forming into a sheet with a heat press. Further, when it is obtained as a tubular structure, it is possible to use a method in which a sheet-shaped product is wound around a core rod and subjected to heat treatment, or a product obtained by general extrusion molding, compression molding or the like. The most preferable form of the intermediate layer of the present invention is a sheet-shaped product of an elastomer obtained by mixing 20 parts by weight or more of an isoprene derivative with 100 parts by weight of a styrene-based elastomer by a conventional method.

【0013】本発明の外層に用いる材料としては特に限
定しないが、中間層と同様のオレフィン系エラストマー
などを用いる。具体的には、ミラストマー,タフマー
(三井石油化学)などが挙げられる。また多孔体の構造
としては、編み、織り、組み等の処理を行った繊維構造
体や不織布が挙げられる。本発明の外層の最も好ましい
形態としては、オレフィン系エラストマー不織布であ
る。オレフィン系エラストマー不織布は、溶出物がなく
安全であることから、炎症性が低く早期に不織布内に線
維芽細胞が侵入する。それによって、穿刺後良好な止血
性が得られる。オレフィン系エラストマー不織布の加工
方法は、スパンボンド法、メルトブローン法、フラッシ
ュ紡糸法、カード法など既知の方法により行うことがで
きる。また不織布の線維径は、0.1から100μm、好
ましくは1μmから20μmの範囲が望ましい。1μm以
下であると強度の面から問題があり、また20μm以上
であると生体と接触するには硬すぎ物理的に炎症を惹起
しやすくなる。
The material used for the outer layer of the present invention is not particularly limited, but the same olefin elastomer as that for the intermediate layer is used. Specific examples include Mirastomer and Tuffmer (Mitsui Petrochemical). Examples of the structure of the porous body include a fibrous structure and a non-woven fabric that have been subjected to treatments such as knitting, weaving, and braiding. The most preferable form of the outer layer of the present invention is an olefin elastomer nonwoven fabric. Since the olefin elastomer nonwoven fabric is safe without eluates, it has low inflammatory properties and allows fibroblasts to invade into the nonwoven fabric at an early stage. Thereby, good hemostasis after puncture is obtained. The olefin elastomer nonwoven fabric can be processed by a known method such as a spun bond method, a melt blown method, a flash spinning method, and a card method. The fiber diameter of the non-woven fabric is in the range of 0.1 to 100 μm, preferably 1 to 20 μm. If it is 1 μm or less, there is a problem in terms of strength, and if it is 20 μm or more, it is too hard to come into contact with a living body and physical inflammation is likely to occur.

【0014】本発明の人工血管は通常内径3mm〜10mm
の範囲で用いられ、各層の厚さは以下の範囲で用いられ
る。内層は50μm〜500μm程度あれば良い。中間層
は厚い程穿刺耐性は良いが、通常の医療用針の使用に耐
えるには0.1〜0.5mm程度あれば良い。外層は厚い程
組織侵入が良好であるが50μm〜500μm程度あれば
良い。なお、得られた各層間の複合化は、各種バインダ
ーを用いる方法や熱による融着など既知の方法により接
着は可能であるが、安全性の面から熱による融着が望ま
しい。
The artificial blood vessel of the present invention usually has an inner diameter of 3 mm to 10 mm.
The thickness of each layer is within the following range. The inner layer may have a thickness of about 50 μm to 500 μm. The thicker the intermediate layer is, the better the puncture resistance is, but it is about 0.1 to 0.5 mm in order to withstand the use of a normal medical needle. The thicker the outer layer is, the better the tissue penetration is, but the thickness may be about 50 μm to 500 μm. The obtained layers can be composited by a known method such as a method using various binders or heat fusion, but heat fusion is preferable from the viewpoint of safety.

【0015】[0015]

【実施例】本発明をより詳細に説明するため以下に実施
例をあげて説明する。 (実施例1)スチレン系エラストマーであるタフプレン
(旭化成製)100gとスクアラン(クラレ製)20g
をビーカーに取り、薬匙で良くかき混ぜ一晩放置して熟
成した後、江藤製作所製ミキシングロールを160℃に
して3分間混合した。その後江藤製作所製熱プレス機を
160℃にして、厚み0.4mmのプレスシートを得た。
次にオレフィン系エラストマーであるミラストマー(三
井石油化学社製)をノードソン株式会社製ホットメルト
アプリケーターシステム(ノズル:HMG-19-UF、アプリ
ケーター:HM-3100)にて線径約10から15μmの細線
維から構成される厚さ0.2mmの不織布を得た。
EXAMPLES In order to describe the present invention in more detail, examples will be described below. (Example 1) 100 g of styrene-based elastomer Tuffprene (manufactured by Asahi Kasei) and 20 g of squalane (manufactured by Kuraray)
The mixture was placed in a beaker, stirred well with a spoon and left overnight for aging, and then mixed for 3 minutes at 160 ° C. with a mixing roll manufactured by Eto Seisakusho. Then, the heat press manufactured by Eto Seisakusho was set to 160 ° C. to obtain a press sheet having a thickness of 0.4 mm.
Next, the olefin elastomer Mirastomer (made by Mitsui Petrochemical Co., Ltd.) was applied to the Nordson hot melt applicator system (nozzle: HMG-19-UF, applicator: HM-3100) to obtain fine fibers with a diameter of about 10 to 15 μm. A non-woven fabric having a thickness of 0.2 mm was obtained.

【0016】次に、ポリエチレンテレフタレートおよび
ポリブチレンテレフタレートよりなる接合型の弾性複合
繊維(複合重量50:50、30デニール/18フィラ
メントの複合繊維)を使用し、30ゲージダブルラッセ
ル機により逆ハーフ編みして得られた管状の布はくを裏
返した後精錬処理し、内径4mmの管状体を得た。次に得
られた管状体にプレスシートを巻き付けオーブンで12
0℃、5分間加熱処理した。さらに、その外側に不織布
を巻き付けオーブンで120℃、5分間加熱処理し熱融
着させて、本発明の人工血管1を得た。
Next, reverse-half knitting was carried out by a 30 gauge double Russell machine using a joint type elastic composite fiber (composite weight 50:50, 30 denier / 18 filament composite fiber) made of polyethylene terephthalate and polybutylene terephthalate. The tubular cloth foil thus obtained was turned upside down and then refined to obtain a tubular body having an inner diameter of 4 mm. Next, a press sheet is wrapped around the obtained tubular body, and it is placed in an oven for 12
Heat treatment was performed at 0 ° C. for 5 minutes. Further, a non-woven fabric was wrapped around the outside and heat-treated at 120 ° C. for 5 minutes in an oven to be heat-sealed to obtain an artificial blood vessel 1 of the present invention.

【0017】(実施例2)スチレン系エラストマーであ
るクレイトン(シェル化学社製)100gとスクアラン
(クラレ社)30gを実施例1と同様に混合した後、押
し出し成形機により内径5mm、長さ6cmのチューブ状に
加工し、チューブを得た。次に、実施例1と同じ不織布
と管状体を作製し、管状体をチューブに挿入し、その外
側に不織布を巻き付けオーブンで120℃、5分間加熱
処理し熱融着させて、本発明の人工血管2を得た。
Example 2 100 g of Clayton (made by Shell Chemical Co., Ltd.), which is a styrene-based elastomer, and 30 g of squalane (Kuraray Co., Ltd.) were mixed in the same manner as in Example 1, and then the mixture was extruded with an inner diameter of 5 mm and a length of 6 cm. A tube was obtained by processing into a tube. Next, the same non-woven fabric and tubular body as in Example 1 were prepared, the tubular body was inserted into a tube, and the non-woven fabric was wrapped around the outer periphery of the non-woven fabric and heat-treated at 120 ° C. for 5 minutes in an oven to be heat-melted to produce the artificial body of the invention. Blood vessel 2 was obtained.

【0018】(試験例1)本発明の人工血管1につい
て、透析用グラフト(Gore−Tex(ゴア・テック
ス社))を比較対照に用いて、漏水量を測定した。その
結果を図2に示す。結果に示す通り本発明の人工血管は
優れた穿刺耐性を有する。
Test Example 1 With respect to the artificial blood vessel 1 of the present invention, the amount of water leakage was measured using a dialysis graft (Gore-Tex (Gore Tex Co.)) as a comparative control. The result is shown in FIG. As shown in the results, the artificial blood vessel of the present invention has excellent puncture resistance.

【0019】(試験例2)本発明の人工血管1及び人工
血管2と、比較として透析用グラフト(Gore−Te
x(ゴア・テックス社))とを、。結果を表1に示す。
Test Example 2 The artificial blood vessel 1 and the artificial blood vessel 2 of the present invention are compared with a dialysis graft (Gore-Te) for comparison.
x (Gore Tex Co., Ltd.) and. The results are shown in Table 1.

【0020】[0020]

【表1】 [Table 1]

【0021】結果に示す通り本発明の人工血管は血液漏
れが少なく優れた穿刺耐性と、組織結合性を有する。
As shown in the results, the artificial blood vessel of the present invention has less blood leakage and has excellent puncture resistance and tissue binding property.

【0022】[0022]

【発明の効果】本発明の人工血管は、内層にポリエステ
ル系樹脂多孔体を設けることにより、耐圧強度の向上や
新生内膜の固着性に優れており、スチレン系エラストマ
ーおよび/またはオレフィン系エラストマー100重量
部に対してイソプレン誘導体を20重量部以上混合した
樹脂は血液の漏れ防止に優れており、かつオレフィン系
エラストマー不織布を積層することにより良好な組織結
合性が得られる。したがって、穿刺針や留置針などの医
療用針の頻回の穿刺に対する穿刺耐性、及び吻合する生
体血管や周辺組織に対する適合性に優れており、透析用
グラフトなどの人工血管に有効に使用できる。
EFFECT OF THE INVENTION The artificial blood vessel of the present invention has an improved inner layer with a polyester resin porous body, which improves pressure resistance and is excellent in the adhesion of the neointima. The styrene elastomer and / or the olefin elastomer 100 A resin obtained by mixing 20 parts by weight or more of an isoprene derivative with respect to parts by weight is excellent in preventing blood leakage, and good tissue bonding can be obtained by laminating an olefin elastomer nonwoven fabric. Therefore, it excels in puncture resistance against frequent punctures of medical needles such as puncture needles and indwelling needles, and has compatibility with anastomotic living blood vessels and surrounding tissues, and can be effectively used for artificial blood vessels such as dialysis grafts.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の人工血管の断面図である。FIG. 1 is a cross-sectional view of an artificial blood vessel of the present invention.

【図2】試験例1における穿刺耐性試験の結果を示すグ
ラフである。
FIG. 2 is a graph showing the results of a puncture resistance test in Test Example 1.

【符号の説明】[Explanation of symbols]

1・・・人工血管、2・・・内層、3・・・中間層、4・・・外層 1 ... artificial blood vessel, 2 ... inner layer, 3 ... middle layer, 4 ... outer layer

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】多孔質の内層と外層との間に無孔質の中間
層を有する人工血管において、内層がポリエステル系樹
脂多孔体、中間層がスチレン系エラストマー及び/又は
オレフィン系エラストマー100重量部に対してイソプ
レン誘導体を20重量部以上配合した材料からなる穿刺
耐性体であることを特徴とする人工血管。
1. An artificial blood vessel having a non-porous intermediate layer between a porous inner layer and an outer layer, wherein the inner layer is a polyester resin porous body and the intermediate layer is a styrene elastomer and / or an olefin elastomer 100 parts by weight. On the other hand, an artificial blood vessel which is a puncture resistant body made of a material containing 20 parts by weight or more of an isoprene derivative.
【請求項2】請求項1記載の人工血管において、内層が
ポリエチレンテレフタレートとポリブチレンテレフタレ
ートの複合繊維を編み、織り、組み処理を行った繊維構
造体、中間層がスチレン系エラストマー100重量部に
対してイソプレン誘導体を20重量部以上配合した材料
からなる穿刺耐性体、外層がオレフィン系エラストマー
不織布からなることを特徴とする人工血管。
2. The artificial blood vessel according to claim 1, wherein the inner layer is a fiber structure in which a composite fiber of polyethylene terephthalate and polybutylene terephthalate is knitted, woven, and braided, and the intermediate layer is based on 100 parts by weight of a styrene elastomer. An artificial blood vessel characterized in that a puncture resistant body made of a material containing 20 parts by weight or more of an isoprene derivative and an outer layer made of an olefin elastomer nonwoven fabric.
JP14211095A 1995-04-27 1995-06-08 Artificial blood vessel Expired - Fee Related JP3229776B2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP14211095A JP3229776B2 (en) 1995-06-08 1995-06-08 Artificial blood vessel
US08/637,478 US5904967A (en) 1995-04-27 1996-04-25 Puncture resistant medical material
EP19960400903 EP0742021B1 (en) 1995-04-27 1996-04-26 Puncture resistant medical material
DE69618271T DE69618271T2 (en) 1995-04-27 1996-04-26 Puncture-proof medical material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14211095A JP3229776B2 (en) 1995-06-08 1995-06-08 Artificial blood vessel

Publications (2)

Publication Number Publication Date
JPH08332218A true JPH08332218A (en) 1996-12-17
JP3229776B2 JP3229776B2 (en) 2001-11-19

Family

ID=15307659

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14211095A Expired - Fee Related JP3229776B2 (en) 1995-04-27 1995-06-08 Artificial blood vessel

Country Status (1)

Country Link
JP (1) JP3229776B2 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999012496A1 (en) 1997-09-08 1999-03-18 Terumo Kabushiki Kaisha Blood vessel prosthesis
JP2008511418A (en) * 2004-08-31 2008-04-17 シー・アール・バード・インコーポレイテツド Self-sealing PTFE graft with torsion resistance
JP2009502226A (en) * 2005-07-22 2009-01-29 アーク・セラピューティックス・リミテッド Stent
JP2014186281A (en) * 2013-03-25 2014-10-02 Marui:Kk Artificial blood vessel and method for molding artificial blood vessel
JP2017506921A (en) * 2014-02-21 2017-03-16 ヒーリオニクス・コーポレイションHealionics Corporation Vascular graft and method for maintaining its patency
JPWO2020095713A1 (en) * 2018-11-08 2021-10-07 デンカ株式会社 Artificial blood vessel
WO2022209038A1 (en) * 2021-03-31 2022-10-06 朝日インテック株式会社 Blood vessel model
US11965096B2 (en) 2018-11-08 2024-04-23 Denka Company Limited Resin composition and biological model using same

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JP2005152178A (en) * 2003-11-25 2005-06-16 Terumo Corp Artificial blood vessel
US8833402B2 (en) * 2010-12-30 2014-09-16 Cook Medical Technologies Llc Woven fabric having composite yarns for endoluminal devices

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999012496A1 (en) 1997-09-08 1999-03-18 Terumo Kabushiki Kaisha Blood vessel prosthesis
JP2008511418A (en) * 2004-08-31 2008-04-17 シー・アール・バード・インコーポレイテツド Self-sealing PTFE graft with torsion resistance
JP2009502226A (en) * 2005-07-22 2009-01-29 アーク・セラピューティックス・リミテッド Stent
JP2014186281A (en) * 2013-03-25 2014-10-02 Marui:Kk Artificial blood vessel and method for molding artificial blood vessel
JP2017506921A (en) * 2014-02-21 2017-03-16 ヒーリオニクス・コーポレイションHealionics Corporation Vascular graft and method for maintaining its patency
JPWO2020095713A1 (en) * 2018-11-08 2021-10-07 デンカ株式会社 Artificial blood vessel
US11965096B2 (en) 2018-11-08 2024-04-23 Denka Company Limited Resin composition and biological model using same
WO2022209038A1 (en) * 2021-03-31 2022-10-06 朝日インテック株式会社 Blood vessel model

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