JPH05184611A - 弁輪支持器具及びその取り付け方法 - Google Patents

弁輪支持器具及びその取り付け方法

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Publication number
JPH05184611A
JPH05184611A JP4060735A JP6073592A JPH05184611A JP H05184611 A JPH05184611 A JP H05184611A JP 4060735 A JP4060735 A JP 4060735A JP 6073592 A JP6073592 A JP 6073592A JP H05184611 A JPH05184611 A JP H05184611A
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Japan
Prior art keywords
valve
valvular
annulation
annulus
sewn
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Withdrawn
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English (en)
Inventor
Kenji Kusuhara
健嗣 楠原
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Individual
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Individual
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/24—Heart valves ; Vascular valves, e.g. venous valves; Heart implants, e.g. passive devices for improving the function of the native valve or the heart muscle; Transmyocardial revascularisation [TMR] devices; Valves implantable in the body
    • A61F2/2442—Annuloplasty rings or inserts for correcting the valve shape; Implants for improving the function of a native heart valve
    • A61F2/2445—Annuloplasty rings in direct contact with the valve annulus
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/24—Heart valves ; Vascular valves, e.g. venous valves; Heart implants, e.g. passive devices for improving the function of the native valve or the heart muscle; Transmyocardial revascularisation [TMR] devices; Valves implantable in the body
    • A61F2/2442—Annuloplasty rings or inserts for correcting the valve shape; Implants for improving the function of a native heart valve
    • A61F2/2454—Means for preventing inversion of the valve leaflets, e.g. chordae tendineae prostheses
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S623/00—Prosthesis, i.e. artificial body members, parts thereof, or aids and accessories therefor
    • Y10S623/90—Stent for heart valve

Landscapes

  • Health & Medical Sciences (AREA)
  • Cardiology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Transplantation (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Prostheses (AREA)

Abstract

(57)【要約】 【構成】 本発明の弁輪支持器具１は、哺乳類動物の心
臓の弁に設けられ当該弁の逆流を防止するための器具で
あって、弁輪の縁部に縫着される複数の縫着部５，５
と、これらの縫着部５，５間に弁口を横断する様に設け
られ前記縁部を近接させて支持する支持部７とを具備し
てなることを特徴とする。また、弁輪支持器具の取り付
け方法は、哺乳類動物の心臓の弁の弁輪の縁部を近接さ
せた状態とし、この弁口を横断する様に支持部を配置
し、前記縁部に縫着部を縫着させることを特徴とする。 【効果】 支持部が弁輪の縁部を互いに近接させて弁腹
に余裕を持たせた状態で支持することができ、したがっ
て、弁輪が拡大した場合や腱索が延長もしくは断裂した
場合や弁尖が萎縮した場合であっても、当該弁を完全に
閉じることができ、逆流を防止することができる。

Description

【発明の詳細な説明】
【０００１】
【産業上の利用分野】本発明は、哺乳類動物の心臓の弁
に設けられ弁逆流を防止することができる弁輪支持器具
及びその取り付け方法に関するものである。
【０００２】
【従来の技術】哺乳類動物の心臓には４つの弁があり、
右心房と右心室との間にある弁を三尖弁、左心房と左心
室との間にある弁を僧帽弁、右心室と肺動脈との間にあ
る弁を肺動脈弁、左心室と大動脈との間にある弁を大動
脈弁とそれぞれ称しており、前記三尖弁と僧帽弁の２つ
を房室弁と称している。例えば、僧帽弁が正常に動作す
る場合、左心室の収縮期には該僧帽弁は完全に閉じて左
心室内の血液を大動脈に送りだし、また、左心室の拡張
期には該僧帽弁は完全に開き左心房から該左心室内に血
液を流入させるのであるが、何らかの原因で弁輪が拡大
した場合や腱索が延長もしくは断裂した場合には、僧帽
弁は完全に閉じずに弁口の一部が開いた状態となり血液
が左心室から左心房内に逆流する（弁逆流）という現象
が起る。また、大動脈弁が正常に動作する場合、左心室
の収縮期には該大動脈弁は完全に開き該左心室内の血液
を大動脈に送りだし、また、左心室の拡張期には該大動
脈弁は完全に閉じ左心房から該左心室内に血液を流入さ
せるのであるが、前記房室弁と同様に、何らかの原因で
弁輪が拡大した場合や弁尖が萎縮した場合には、大動脈
弁は完全に閉じずに弁口の一部が開いた状態となり血液
が大動脈から左心室内に逆流する（弁逆流）という現象
が起る。
【０００３】上記弁逆流に対する治療法としては、例え
ば、弁尖腱索を切除し残った弁輪に人工弁や生体弁を縫
着する弁置換術、あるいは自己弁を温存する方法として
弁輪の一端を縫い合わせて弁輪を縫縮させたり、弁輪に
リングを縫合固定したり等の弁輪縫縮術、及び弁を修復
する弁形成術等が知られている。
【０００４】
【発明が解決しようとする課題】しかしながら、上記の
治療法には様々な欠点があった。すなわち、弁置換術に
は用いる人工弁や生体弁が極めて高価で寿命が短いとい
う欠点があり、また、弁輪縫縮術や弁輪形成術には弁中
央部よりの逆流は容易に消失させることができないとい
う欠点があった。
【０００５】本発明は、上記の事情に鑑みてなされたも
のであって、従来の様々な欠点を解決することができ、
しかも、弁逆流を効果的に防止することができる弁輪支
持器具及びその取り付け方法を提供することにある。
【０００６】
【課題を解決するための手段】上記課題を解決するため
に、本発明は次の様な弁輪支持器具及びその取り付け方
法を採用した。すなわち、請求項１記載の弁輪支持器具
は、哺乳類動物の心臓の弁に設けられ当該弁の逆流を防
止するための器具であって、弁輪の縁部に縫着される複
数の縫着部と、これらの縫着部間に弁口を横断する様に
設けられ前記縁部を近接させて支持する支持部とを具備
してなることを特徴としている。
【０００７】また、請求項２記載の弁輪支持器具の取り
付け方法は、哺乳類動物の心臓の弁の弁輪の縁部を近接
させた状態とし、この弁口を横断する様に支持部を配置
し、前記縁部に縫着部を縫着させることを特徴としてい
る。
【０００８】
【作用】本発明の請求項１記載の弁輪支持器具では、前
記支持部が弁輪の縁部を互いに近接させて弁腹に余裕を
持たせた状態で支持する。これにより、弁輪が拡大した
場合であっても、当該弁は完全に閉じて逆流を防止す
る。
【０００９】また、請求項２記載の弁輪支持器具の取り
付け方法では、哺乳類動物の心臓の弁の弁輪の縁部を近
接させた状態とし、この弁口を横断する様に支持部を配
置し、前記縁部に縫着部を縫着させることにより、弁輪
支持器具を弁輪の縁部に容易かつ速やかに取り付ける。
【００１０】
【実施例】以下、本発明の各実施例について図面を参照
して説明する。 （第１実施例）図１は、弁輪支持器具１を示す斜視図で
ある。この弁輪支持器具１は、僧帽弁の左心房側に設け
られ弁逆流を防止するための器具であって、図２に示す
僧帽弁２の弁輪３の対側縁４，４に縫着される一対の板
状の縫着部５，５と、これらの縫着部５，５間に弁口６
を横断する様に設けられ対側縁４，４を近接させて支持
する弓型状に湾曲してなる断面流線型状の棒状の支持部
７とから構成されている。
【００１１】縫着部５，５及び支持部７は、坑血栓性及
び坑溶血性を有する材料であるアルミナ（Ａｌ2Ｏ3）が
表面に被覆されており、また、縫着部５，５には弁輪３
との縫着部分に、坑血栓性及び坑溶血性を有する有機材
料であるポリテトラフルオロエチレンまたはポリエステ
ルのいずれか１種が被覆されている。
【００１２】この弁輪支持器具１を僧帽弁２の弁輪３に
取り付けるには、図３に示す様に、弁輪３の対側縁４，
４を近接させた状態とし、この弁口６を横断する様に支
持部７を配置し、対側縁４，４各々に縫着部５を縫着す
る。
【００１３】以上説明した様に、上記の弁輪支持器具１
によれば、縫着部５，５と支持部７とから構成すること
としたので、左心室の収縮期に僧帽弁を完全に閉じた状
態とすることができ、したがって、弁逆流を防止するこ
とができる。また、支持部７は左心房側に突出する様に
湾曲しているので、支持部７は弁尖に当たることがな
い。
【００１４】また、縫着部５，５及び支持部７は、坑血
栓性及び坑溶血性を有する材料であるアルミナ（Ａｌ2
Ｏ3）が表面に被覆されているので、生体適合性を向上
させることができ、また、弁輪支持器具１自体が血栓性
や溶血性の原因となることもなく、しかも耐久性を著し
く向上させることができる。また、縫着部５，５には弁
輪３との縫着部分に、坑血栓性及び坑溶血性を有する有
機材料であるポリテトラフルオロエチレンまたはポリエ
ステルのいずれか１種を被覆することとしたので、生体
適合性を向上させることができ、縫着部５，５の弁輪３
への縫着を容易に行うことができる。
【００１５】また、弁輪支持器具１の取り付け方法によ
れば、弁輪３の対側縁４，４を近接させた状態とし、こ
の弁口６を横断する様に支持部７を配置し、対側縁４，
４各々に縫着部５を縫着することとしたので、該弁輪支
持器具１を心房側の弁輪３の対側縁４，４に容易かつ速
やかに取り付けることができる。
【００１６】図４は、弁輪支持器具１の変形実施例を示
す斜視図である。この弁輪支持器具１１は、縫着部５，
５間に２つの支持部７，７を互いに平行に設けたもので
ある。この弁輪支持器具１１は、図５に示す様に、弁輪
支持器具１と全く同様の方法により僧帽弁２の弁輪３に
取り付けることができる。この弁輪支持器具１１及びそ
の取り付け方法においても、弁輪支持器具１と全く同様
の作用・効果を奏することができ、更に支持部７，７の
強度を向上させることができる。
【００１７】（第２実施例）図６は、弁輪支持器具２１
を示す斜視図である。この弁輪支持器具２１は、大動脈
弁の大動脈側に設けられ弁逆流を防止するための器具で
あって、図７に示す大動脈弁２２の弁輪２３の各交連部
２４，…に縫着される３個の板状の縫着部２５，…と、
これらの縫着部２５，…間に弁口２６を横断する様に設
けられ各交連部２４，…を近接させて支持する三叉状の
棒状体からなる支持部２７とから構成されている。
【００１８】縫着部２５，…及び支持部２７は、坑血栓
性及び坑溶血性を有する材料であるアルミナ（Ａｌ
2Ｏ3）が表面に被覆されており、また、縫着部２５，…
には弁輪２３との縫着部分に、坑血栓性及び坑溶血性を
有する有機材料であるポリテトラフルオロエチレンまた
はポリエステルのいずれか１種が被覆されている。
【００１９】この弁輪支持器具２１を大動脈弁２２の弁
輪２３に取り付けるには、図８に示す様に、弁輪２３の
各交連部２４，…を近接させた状態とし、この弁口２６
を横断する様に支持部２７を配置し、前記各交連部２
４，…に縫着部２５，…を対応させ縫着する。
【００２０】以上説明した様に、上記の弁輪支持器具２
１によれば、縫着部２５，…と支持部２７とから構成す
ることとしたので、左心室の拡張期に大動脈弁２２を完
全に閉じた状態とすることができ、したがって、弁逆流
を防止することができる。また、支持部２７は三叉状の
棒状体であるので、支持部２７の強度を向上させるとと
もに血流に対する抵抗を小さくすることができる。
【００２１】また、縫着部２５，…及び支持部２７は、
坑血栓性及び坑溶血性を有する材料であるアルミナ（Ａ
ｌ2Ｏ3）が表面に被覆されているので、生体適合性を向
上させることができ、また、弁輪支持器具２１自体が血
栓性や溶血性の原因となることもなく、しかも耐久性を
著しく向上させることができる。また、縫着部２５，…
には弁輪２３との縫着部分に、坑血栓性及び坑溶血性を
有する有機材料であるポリテトラフルオロエチレンまた
はポリエステルのいずれか１種を被覆することとしたの
で、生体適合性を向上させることができ、縫着部２５，
…の弁輪２３への縫着を容易に行うことができる。
【００２２】また、弁輪支持器具２１の取り付け方法に
よれば、弁輪２３の各交連部２４，…を近接させた状態
とし、この弁口２６を横断する様に支持部２７を配置
し、前記各交連部２４，…に縫着部２５，…を対応させ
縫着することとしたので、該弁輪支持器具２１を弁輪２
３の各交連部２４，…に容易かつ速やかに取り付けるこ
とができる。
【００２３】図９は、弁輪支持器具２１の変形実施例を
示す斜視図である。この弁輪支持器具３１は、縫着部２
５，…間に三角形状の棒状体からなる支持部３２を設
け、該支持部３２の各頂部を縫着部２５各々に固定して
なるものである。この弁輪支持器具３１は、図１０に示
す様に、弁輪支持器具２１と全く同様の方法により大動
脈弁２２の弁輪２３に取り付けることができる。この弁
輪支持器具３１及びその取り付け方法においても、弁輪
支持器具２１と全く同様の作用・効果を奏することがで
きる。
【００２４】
【発明の効果】以上説明した様に、本発明の請求項１記
載の弁輪支持器具によれば、哺乳類動物の心臓の弁に設
けられ当該弁の逆流を防止するための器具であって、弁
輪の縁部に縫着される複数の縫着部と、これらの縫着部
間に弁口を横断する様に設けられ前記縁部を近接させて
支持する支持部とを具備してなることとしたので、前記
支持部が弁輪の縁部を互いに近接させて弁腹に余裕を持
たせた状態で支持することができ、したがって、弁輪が
拡大した場合であっても、当該弁を完全に閉じることが
でき、逆流を防止することができる。
【００２５】また、請求項２記載の弁輪支持器具の取り
付け方法によれば、哺乳類動物の心臓の弁の弁輪の縁部
を近接させた状態とし、この弁口を横断する様に支持部
を配置し、前記縁部に縫着部を縫着させることとしたの
で、該弁輪支持器具を弁輪の縁部に容易かつ速やかに取
り付けることができる。
【図面の簡単な説明】
【図１】本発明に係る第１実施例の弁輪支持器具を示す
斜視図である。
【図２】心臓の心房側から見た僧帽弁を示す概略図であ
る。
【図３】本発明に係る第１実施例の弁輪支持器具を心房
側から見た僧帽弁に取り付けた状態を示す正面図であ
る。
【図４】本発明の第１実施例の変形実施例の弁輪支持器
具を示す斜視図である。
【図５】本発明の第１実施例の変形実施例の弁輪支持器
具を心房側から見た僧帽弁に取り付けた状態を示す正面
図である。
【図６】本発明に係る第２実施例の弁輪支持器具を示す
斜視図である。
【図７】心臓の大動脈側から見た大動脈弁を示す概略図
である。
【図８】本発明に係る第２実施例の弁輪支持器具を大動
脈側から見た大動脈弁に取り付けた状態を示す正面図で
ある。
【図９】本発明の第２実施例の変形実施例の弁輪支持器
具を示す斜視図である。
【図１０】本発明の第２実施例の変形実施例の弁輪支持
器具を大動脈側から見た大動脈弁に取り付けた状態を示
す正面図である。
【符号の説明】
１ 弁輪支持器具 ２ 僧帽弁 ３ 弁輪 ４ 対側縁 ５ 板状の縫着部 ６ 弁口 ７ 支持部 １１ 弁輪支持器具 ２１ 弁輪支持器具 ２２ 大動脈弁 ２３ 弁輪 ２４ 交連部 ２５ 縫着部 ２６ 弁口 ２７ 支持部 ３１ 弁輪支持器具 ３２ 支持部

Claims (2)

    【特許請求の範囲】
  1. 【請求項１】 哺乳類動物の心臓の弁に設けられ当該弁
    の逆流を防止するための器具であって、 弁輪の縁部に縫着される複数の縫着部と、 これらの縫着部間に弁口を横断する様に設けられ前記縁
    部を近接させて支持する支持部とを具備してなることを
    特徴とする弁輪支持器具。
  2. 【請求項２】 哺乳類動物の心臓の弁の弁輪の縁部を近
    接させた状態とし、この弁口を横断する様に支持部を配
    置し、前記縁部に縫着部を縫着させることを特徴とする
    弁輪支持器具の取り付け方法。
JP4060735A 1991-03-19 1992-03-17 弁輪支持器具及びその取り付け方法 Withdrawn JPH05184611A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4060735A JPH05184611A (ja) 1991-03-19 1992-03-17 弁輪支持器具及びその取り付け方法

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP3-130847 1991-03-19
JP13084791 1991-03-19
JP4060735A JPH05184611A (ja) 1991-03-19 1992-03-17 弁輪支持器具及びその取り付け方法

Publications (1)

Publication Number Publication Date
JPH05184611A true JPH05184611A (ja) 1993-07-27

Family

ID=15044086

Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (3)

Country Link
US (1) US5360444A (ja)
JP (1) JPH05184611A (ja)
GB (1) GB2254254B (ja)

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