JP6532855B2 - 拡張型椎体間スペーサ - Google Patents
拡張型椎体間スペーサ Download PDFInfo
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- JP6532855B2 JP6532855B2 JP2016501756A JP2016501756A JP6532855B2 JP 6532855 B2 JP6532855 B2 JP 6532855B2 JP 2016501756 A JP2016501756 A JP 2016501756A JP 2016501756 A JP2016501756 A JP 2016501756A JP 6532855 B2 JP6532855 B2 JP 6532855B2
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Description
この出願は、「Expandable Interbody Spacer」と題する2012年5月20日に出願された米国特許出願第13/483,852号の一部継続出願であり、その全体が参照により本明細書に援用される。
本開示は、椎間板を含む、脊椎の1つ以上の損傷、罹患、または外傷部分を治療して、関連する腰痛を軽減するか取り除くための装置及び方法の実施形態に関する。1つ以上の実施形態では、本開示は拡張型椎体間スペーサに関する。さらに、本開示は開示された装置を移植するための工具及び方法について記載する。
脊椎動物の脊椎は、体の他の部分を構造的に支持する、骨格の軸である。ヒトにおいて、正常な脊椎は頸部に7個、胸部に12個、及び腰部に5個の分節を有する。腰部脊椎は仙骨の上に位置し、これは次に骨盤に接続し、順に腰及び脚の骨によって支えられている。脊椎の骨の椎体は椎間板で分離されている。これらは関節として作用しながらも屈曲、伸長、側屈、及び軸回転を既知の度合で可能とする。
本開示の実施形態は、拡張型椎体間スペーサに関する。拡張型椎体間スペーサは、端と端とが枢動可能に連結される複数のリンクを備える第1の接合アームを備えていてもよい。拡張型椎体間スペーサはさらに、端と端とが枢動可能に連結される複数のリンクを備える第2の接合アームを備えていてもよい。第1の接合アーム及び第2の接合アームは、拡張型椎体間スペーサの近位端で相互接続していてもよい。第1の接合アーム及び第2の接合アームは、拡張型椎体間スペーサの遠位端で相互接続していてもよい。第1の接合アーム及び第2の接合アームはそれぞれ、拡張型椎体間スペーサを拡張位置に配置するために、反対方向に内側に折り曲がるように構成されていてもよい。
本開示の実施形態は、添付の図面に図示されるその実施形態を参照することでより容易に理解されるであろう。
本開示の好ましい実施形態を、添付図面を参照して説明する。本発明の以下の詳細な説明は、全ての実施形態を図示する意図はない。本開示の好ましい実施形態を説明する中で、具体的な用語は明確性のために使用されている。しかしながら、本明細書に説明される実施形態は、そのように選択された具体的な用語に限定されことを意図するものではない。各具体的な要素は、同様の目的を実現するために同様の様態で動作する全ての技術的等価物を含むように理解されるものとする。
次に図17〜19を参照すると、本開示の別の実施形態にしたがって拡張型椎体間スペーサ10が図示されている。図示の実施形態では、拡張型椎体間スペーサ10は第1の接合アーム40及び第2の接合アーム50を備える。第1の接合アーム40は近位端80と遠位端90とを有する。第2の接合アーム50は近位端180と遠位端190とを有する。近位端80、180は、図19に示すように、例えばピン100によって枢動可能に連結されてもよい。遠位端90、180もまた、図19に示すように、例えばピン100によって枢動可能に連結されてもよい。第1の接合アーム40は第1のリンク110及び第3のリンク130を備え、第1のリンク110と第3のリンク130は枢動可能に連結している。図1〜10の第1の接合アーム40とは対照的に、第2のリンク120がない。図20によって示すように、第3のリンク130は第1の連結セグメント400と第2の連結セグメント410とを備えていてもよく、これらは例えばピン420によって互いに固定されてもよい。第1の連結セグメント400及び第2の連結セグメント410は溝形接続を有していてもよく、例えば第1の連結セグメント400における溝430が第2の連結セグメント410の凸部440を受けてもよい。第2の接合アームは第1のリンク200及び第3のリンク220を備え、第1のリンク200と第3のリンク220は枢動可能に連結される。図1〜10の第2の接合アーム50と対照的に、第2のリンク210がない。
Claims (14)
- 脊椎疾患を治療するためのシステムであって、前記システムは
第1の構成と第2の構成との間で移行するように構成される椎体間インプラントであって、
第1の端及び第2の端を含む第1のアームであって、互いに連結される複数のリンクによって画定される、第1のアーム、
第1の端及び第2の端を含む第2のアームであって、互いに連結される複数のリンクによって画定される、第2のアーム、
前記第1及び第2のアームの前記第1の端に連結される近位構成要素であって、ねじ山を有する内腔を含む近位構成要素、
前記第1及び第2のアームの前記第2の端に連結される遠位構成要素ならびに、
前記内腔に受けられる係止特徴であって、前記内腔の前記ねじ山に係合するねじ山を含む係止特徴、を備える、椎体間インプラントと、
患者内に前記椎体間インプラントを位置付けるための挿入用工具であって、
遠位端及びそれを通って延伸する内腔を画定する細長部材であって、前記椎体間インプラントの前記近位構成要素を解放可能に係合するように構成される、細長部材、ならびに
前記細長部材の前記内腔内に設けられ、前記遠位構成要素を解放可能に係合するように構成されるシャフト部材であって、前記挿入用工具の作動が、前記第1の構成と前記第2の構成との間で前記椎体間インプラントを移行させるように前記細長部材を前記シャフト部材に対して動かす、シャフト部材を備える、前記挿入用工具と、
を備え、
前記係止特徴は、前記係止特徴のねじ山が、前記近位構成要素の前記内腔の前記ねじ山に係合し、前記係止特徴が前記近位構成要素の前記内腔内に進入し、前記遠位構成要素に向かって前進し、前記第1および第2のアームの前記第1の端を受け入れている空間に進入するように動作することにより、前記第1および第2のアームが前記第1の構成の場合の第1の位置から前記第2の構成の場合の第2の位置へ戻ることを防止し、これにより、前記椎体間インプラントが前記第1の構成から前記第2の構成に戻るのを防止する、前記システム。 - 前記第1の構成は折り畳まれた構成であり、前記第2の構成は拡張された構成である、
請求項1に記載の前記システム。 - 前記遠位構成要素は、その中を通る通路を含む、請求項1に記載の前記システム。
- 前記第1のアームを画定する前記複数のリンクは、前記複数のリンクのうちの第1のリンクの位置を、前記複数のリンクのうちの別のリンクに対して維持するように、互いに係合するように構成される、請求項1に記載の前記システム。
- 前記挿入用工具の前記細長部材の前記遠位端は複数の弾性アームを含む、請求項1に記載の前記システム。
- 前記細長部材上に摺動可能に設けられるスリーブをさらに備え、前記スリーブは前記複数の弾性アームのうちの少なくとも1つを前記複数の弾性アームのうちの他の弾性アームの方に付勢するように構成される、請求項5に記載の前記システム。
- 前記係止特徴は、円柱状の構成を含む、請求項1に記載の前記システム。
- 前記係止特徴は、その中を通る内腔を画定する、請求項1に記載の前記システム。
- 前記挿入用工具は、前記細長部材の近位端に連結された作動部材を備え、前記作動部材は前記細長部材の前記内腔と連通する内腔を含む、請求項1に記載の前記システム。
- 前記作動部材は、前記シャフト部材を前記作動部材の前記内腔内に摩擦保持するためのキャッチを含む、請求項9に記載の前記システム。
- 前記第1のアームまたは前記第2のアームの前記複数のリンクは、端と端とで互いに枢動可能に連結されている、請求項1に記載の前記システム。
- 前記第1のアームまたは前記第2のアームの前記複数のリンクは、ピンによって互いに枢動可能に連結されている、請求項11に記載の前記システム。
- 前記第1のアームまたは前記第2のアームの前記複数のリンクは、端と端とで接続されている、第1のリンク、第2のリンク、および第3のリンクを備える、請求項1に記載の前記システム。
- 前記第1のアームまたは前記第2のアームの前記複数のリンクは、第1のリンク、第2のリンク、および第3のリンクを備え、
前記第1の構成において、前記第1のリンク、前記第2のリンク、および前記第3のリンクは、一般的に軸方向に並んでいる、請求項1に記載の前記システム。
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