JP2005512613A - 大腿骨頚保護装置 - Google Patents

大腿骨頚保護装置 Download PDF

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JP2005512613A
JP2005512613A JP2003528245A JP2003528245A JP2005512613A JP 2005512613 A JP2005512613 A JP 2005512613A JP 2003528245 A JP2003528245 A JP 2003528245A JP 2003528245 A JP2003528245 A JP 2003528245A JP 2005512613 A JP2005512613 A JP 2005512613A
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femoral neck
sleeve
neck
femoral
protection device
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JP4336199B2 (ja
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ウン チェン プーン
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ウン チェン プーン
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    • A61F2230/0002Two-dimensional shapes, e.g. cross-sections
    • A61F2230/0017Angular shapes
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Abstract

本発明は、大腿骨頚を保護する装置に関する。前記装置は、本体(10)を有する。前記本体(10)は、再形成された大腿骨頚(20)が挿入可能な中空スリーブ(11)を含む。大腿骨頚(20)に隣接する大腿骨表面をしっかりと覆う、外側に延伸するフランジは、前記スリーブの一端に形成される。前記スリーブ(11)の他端は、内側に陥入する頂部を有する、突出するネック部(13)を提供する。前記スリーブ(11)の内部に位置する、前記大腿骨頚(20)に侵入するボルト(14)は、前記ネック部(13)の頂部に収まる。

Description

本発明は、大腿骨頚保護装置に関する。
概して、病院で現在採用されている人工股関節を装着する外科手術は、通常最初に大腿骨頚を鋸で切り、髄内空洞に金属製の大腿骨ステムを挿入してから、固定させるために髄内空洞に骨セメントを注入する。しかし、このような構造はふつう、大腿骨の応力分布の変化を招き、結果的に不安定な固定を生じる。さらに、新たに成長した血管と仮骨では、金属製の大腿骨ロッドを有効に覆うことができない。その結果、金属製大腿骨ロッドは、大腿部を保護する大腿骨と一体的に結合できないため、限られた支持力のせいで、折れた大腿骨と覆った金属をばらばらにする場合がある。こうした構造によって、通常患者は痛みに苦しみ、改善、調整、または矯正のために再度不要な手術を受ける。上記の欠点は、医療専門家と患者を長い間悩ませている。
上記の欠点を改善するため、1999年5月19日に公開された公開番号第2318995の中国特許は、モジュラーヘッドと、大腿骨頚および中央大腿骨スクリューを保護する装置とを備えるステムレスの人工股関節であって、前記モジュラー頚部が半球形状であり、凹形の切頭体穴が球体の外表面の断面の端に配置され、前記大腿骨頚保護装置が中空であり、円筒状の大腿骨頚がアナトミカルカラーを有する人工股関節を開示している。アナトミカルカラーの頂部には、対応する中央大腿骨スクリューを挿入させるための穴がある。また、前記中央大腿骨スクリューは、大腿骨頚保護装置の頂部の穴に挿入されるねじロッドである。釘キャップと大腿骨頚保護装置は同じレベルで、緊密に固定される。臨床実験の手順において、大体骨頚保護装置が中空の釣鐘型で、形状が不規則であるので、不規則な大腿骨頚のための特定の外科手術を行う補助具を製造することができない、といった多くの不合理な点が発見されている。その結果、患者は先の手術の失敗により、別の外科手術を受けなければならない場合がある。
本発明の主目的は、上述した現行の欠点を克服するように、トリミングされた大腿骨頚に直接接続可能な規則的な幾何学形状で保護装置を提供することである。
この発明は、内部が中空のスリーブを有する本体を備える。スリーブは、トリミング後に、規則的な幾何学形状の大腿骨頚に接続される、規則的な幾何学形状を有する。フランジは、スリーブの一端で周縁リムから外側へ延伸し、突出するネック部は、スリーブの他端に設けられて、内側へ向いている。ボルトは、スリーブ内部の大腿骨頚を通過するネック部に配置される。少なくとも1つの孔が、大腿骨頚に固定される留め具を受け入れるために本体に設けられる。大腿骨頚保護装置のモジュラーヘッドは、自由に股関節を動かせるように、ネック部から離れた端部でスリーブに連結される。
この発明は規則的な幾何学形状のスリーブを採用するため、フランジが大腿骨の表面にしっかりと接着される。
図1、2、および3を参照すると、本発明の大腿骨頚保護装置は、トリミングされ、新たに成長した血管および仮骨と一体的に接続された後で、幾何学形状でしっかりと固定し覆うことができる。中空スリーブ(11)を有する本体(10)が装置に配置される。わずかにアーチ形をした幾何学形状のフランジ(12)(本実施の形態では、三角形のフランジ(12)を採用する)は、スリーブ(11)の一端の周縁リムから外側に延びている。ネック部(13)は、スリーブ(11)の他端から延びており、ボルトは図6に示されるように、ネック部(13)に挿入される。ねじ込みヘッドはボルト(14)の一端に配置され、ねじはボルト(14)の他端に配置される。さらに、少なくとも1つの孔(15)が本体(10)上に設けられ、図4に示されるように留め具(40)ではめ込まれる。本実施の形態では、髄内くぎが留め具(40)として用いられる。
本発明の保護装置が図4、5、6および7に示されるように使用されるとき、大腿骨頚(20)は、スリーブ(11)の幾何学形状に適合するように外科手術でトリミングされ、次いで、本体(10)のスリーブ(11)が大腿骨頚(20)に接続されることによって、大腿骨(30)と大腿骨頚(20)が結合される表面に、本体(10)のフランジ(12)をしっかりと固定する。ボルト(14)は、トリミングされた大腿骨頚(20)を通過し、図5および6に示されるように、大腿骨(30)上で固着されるようにスリーブ(11)と結合する。したがって、本体(10)がトリミングされた大腿骨頚(20)にしっかりと結合されるだけでなく、本体(10)の保護によって大腿骨頚(20)が再び成長することが可能になる。スリーブ(11)は幾何学的な円筒形状であり、特殊用途の外科手術道具であるため、本発明はこのような外科手術を可能にする。
さらに、孔(15)を通過して、大腿骨(30)上に固着される留め具(40)は、回転防止のため大腿骨(30)と大腿骨骨幹(図示せず)との間の結合を強化し、本体(10)のフランジ(12)が緩んで離れるのを防ぐ。
本体(10)に設けられる孔(15)は、新たに成長した血管と仮骨にそこを貫通させ、本体(10)を覆わせるのみならず、大腿骨頚(20)と大腿骨(30)を一体に結合させることができる。さらに、大腿骨(30)の人工ボールヘッド(50)は、内部ねじでボルト(14)と結合させるため、スリーブ(11)から離れた端部でネック部(13)に配置されるので、大腿骨のボールヘッド(50)によって大腿骨(30)に接続された股関節は自由に動くことができる。
当然のことながら、上記留め具は髄内くぎ以外の部品でも代用することができ、上記スリーブは幾何学的な円筒形状以外の幾何学形状に置き換えることができ、フランジは大腿骨に調節可能ないかなる形状であってもよく、ボルトの本体にはねじが付いてなくてもよく、大腿骨の人工ボールヘッドはボルトによって固定されてもよい。ここに記載される実施の形態は、単に発明の原理を解説しているだけであり、様々な変形例が、以下の請求項で述べられる発明の精神と範囲を逸脱することなく、当業者によって達成され得ると理解される。
本発明の大腿骨頚保護装置の透視図である。 本発明の大腿骨頚保護装置の上面図である。 本発明の大腿骨頚保護装置の別の透視図である。 本発明の大腿骨頚保護装置の分解図である。 本発明の大腿骨頚保護装置の透視図である。 本発明の大腿骨頚保護装置の断面図である。 大腿骨頚と本発明の大腿骨頚保護装置との関係を示す概略図である。

Claims (8)

  1. トリミングされた大腿骨頚(20)に対応する中空のスリーブ(11)を有する本体(10)を備える大腿骨頚保護装置であって、
    リムの前記スリーブ(11)から、大腿骨と大腿骨頚とを結合するフランジ(12)が延び、
    リムの他端からネック(13)が延び、
    前記ネック(13)の頂部で、ボルト(14)がスリーブ(11)の大腿骨頚を貫通するように固定される、
    大腿骨頚保護装置。
  2. 前記フランジ(12)が、前記大腿骨(30)と前記大腿骨頚(20)とを結合する、ほぼ湾曲した面に配置されることを特徴とする、請求項1に記載の大腿骨頚保護装置。
  3. 前記フランジ(12)が、前記大腿骨(30)と前記大腿骨頚(20)とを結合する、ほぼ三角形の面に配置されることを特徴とする、請求項2に記載の大腿骨頚保護装置。
  4. 前記ボルト(14)が一端で、ねじ込みヘッドとねじ込みボルト部を備えることを特徴とする、請求項1に記載の大腿骨頚保護装置。
  5. 前記本体(10)が、少なくとも1つの穴(15)を備えることを特徴とする、請求項1に記載の大腿骨頚保護装置。
  6. 前記孔(15)が、前記大腿骨(30)上に固定される留め具を受け入れることを特徴とする、請求項4に記載の大腿骨頚保護装置。
  7. 前記留め具(40)が髄内くぎであることを特徴とする、請求項5に記載の大腿骨頚保護装置。
  8. 前記スリーブ(11)から離れた端部の前記ネック部(13)が、前記スリーブ自体を通過させ、前記大腿骨頚の人工ボールヘッド(50)と前記ボルトのねじ込みヘッドとを連結するための内部ねじを備えることを特徴とする、請求項1または4に記載の大腿骨頚保護装置。
JP2003528245A 2001-09-21 2002-08-19 大腿骨頚保護装置 Expired - Fee Related JP4336199B2 (ja)

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PCT/CN2002/000571 WO2003024345A1 (fr) 2001-09-21 2002-08-19 Dispositif de protection du col du femur

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