JP2022519731A - 外部調節デバイス - Google Patents
外部調節デバイス Download PDFInfo
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Abstract
Description
本開示は、一般に、医療デバイスの分野、より具体的には、調節可能なインプラントを調節するための外部調節デバイスに関する。
骨格系のさまざまな障害を治療するために、非侵襲的に調節可能なインプラントが提供されている。ただし、これらのデバイスから外部リモコンへのフィードバックは制限されている。調節可能なインプラントの調節指示は、多くの場合一方向であり、それぞれのリモコンは、調節可能なインプラントによって達成された実際の調節に関するフィードバックを受け取らない。そのため、ユーザは、期待される調節が実際に適用されているかどうかわからないことがよくある。
例示的な一実施形態では、インプラントを非侵襲的に調節するための外部調節デバイスは、回転磁場を生成するように構成された磁気要素;及び前記磁気要素を駆動して回転磁場を生成するように構成され、且つ調節可能なインプラントの永久磁石を回転させるように構成されたドライバ;を包含する。
これら及び他の特徴は、添付の図面を検討することにより、当業者によってさらに理解されるであろう。
限定ではなく説明の目的で、特定の好ましい実施形態の詳細及び説明は、当業者が本発明を作成及び使用することを可能にすることができるように、以下に提供される。これらの詳細及び説明は、特定の好ましい実施形態を代表するものにすぎず、明示的に説明されない無数の他の実施形態は、本明細書を徹底的に検討することにより、当技術分野の技術を有する者によって容易に理解される。したがって、本開示のレビューアは、特許請求の範囲によって本発明の範囲を解釈すべきであり、そのような範囲は、本明細書に記載及び図示された実施形態によって限定されないものとする。
高速フーリエ変換(FFT)は、シーケンスの離散フーリエ変換(DFT)又はその逆(IDFT)を計算するアルゴリズムと見なすことができる。フーリエ解析は、信号を元のドメイン(多くの場合時間又は空間)から周波数ドメインの表現に、又はその逆に変換する。
外部調節デバイス400の近くにインプラント及び鉄材料がないことを確認するステップ、
外部調節デバイス400の磁石440を回転させるステップ、
磁石440の回転中に加速度アレイを測定するステップ、
加速度アレイの加速度ピークを決定するステップ、
加速度アレイを中央のピークにシフトするステップ、
キャプチャされたすべての加速度アレイを平均するステップ、及び
平均化されたアレイを外部調節デバイス400の特性プロファイルとして保存するステップ、
を包含する。いくつかの実施形態では、反時計回りの特性プロファイルが得られる。いくつかの実施形態では、時計回りの特性回転プロファイルが得られる。いくつかの実施形態では、両方のプロファイルを取得することができ、且つ一緒に平均化することができる。
前記外部調節デバイスの磁石を回転させるステップ;
前記磁石の回転中に加速度アレイを測定するステップ;
前記加速度アレイの加速度ピークを決定するステップ;
前記加速度アレイを中央のピークにシフトするステップ;
キャプチャされたすべての加速度アレイを平均するステップ;
テストアレイを取得するために、前記外部調節デバイスの特性プロファイルから平均化されたアレイを差し引くステップ;及び
前記テストアレイのピークツーピーク振幅をしきい値と比較するステップであり、ここで、前記テストアレイのピークツーピーク振幅が前記しきい値よりも大きい場合、結合状態が決定され、且つここで、前記テストアレイのピークツーピーク振幅が前記しきい値よりも小さい場合、非結合状態が決定される、ステップ;
を包含する、調節可能なインプラント200の永久磁石262を備えた外部調節デバイス400の磁石440の結合状態決定の方法の例示的なフローチャートを示している。
第3高調波を観察するステップであり、ここで、第3高調波は、しきい値を表す(present)及びしきい値を超える(above)、のうちの1つ以上である場合、ストールド状態が決定され、且つここで、しきい値が欠落する(missing)及びしきい値を下回る(below)、のうちの1つ以上である場合、ストールド状態は検出されず、前記磁石が結合されるステップ;
を包含する、方法の例示的なフローチャートを示している。
401 ハウジング
402 ハンドル
403 ディスプレイ
410 コントローラ
Claims (46)
- 調節可能なインプラントを非侵襲的に調節するための外部調節デバイスであって、
ハウジング;
前記調節可能なインプラントに関連するアクチュエータと通信するコントローラ;及び
電源;
を含む外部調節デバイス。 - 前記調節可能なインプラントから、又は前記調節可能なインプラントに関する情報を受信するように構成されたセンサをさらに含む、請求項1に記載の外部調節デバイス。
- ディスプレイをさらに含む、請求項1に記載の外部調節デバイス。
- ここで、前記コントローラは外部調節デバイスから取り外し可能である、請求項1に記載の外部調節デバイス。
- ここで、前記コントローラはハンドヘルド電子デバイスである、請求項4に記載の外部調節デバイス。
- 調節インプラントを非侵襲的に調節するための外部調節デバイスであって、当該外部調節デバイスは、
回転磁場を生成するように構成された磁気要素;及び
前記磁気要素を駆動して前記回転磁場を生成するように構成され、且つ調節可能なインプラントの永久磁石を回転させるように構成されたドライバ;
を含む外部調節デバイス。 - 前記磁気要素は回転可能な磁石を含む、請求項6に記載の外部調節デバイス。
- 前記磁気要素は、テーパードプロファイルを有する磁石駆動シャフトに固定されたテーパードプロファイルを有する中空の回転可能な磁石を含む、請求項7に記載の外部調節デバイス。
- 前記中空の回転可能な磁石は、キャップによって前記磁石駆動シャフトに固定されている、請求項8に記載の外部調節デバイス。
- 前記ドライバは、前記磁気要素を回転させて前記回転磁場を生成するように構成されたモータを含む、請求項6に記載の外部調節デバイス。
- コントローラをさらに含む、請求項6に記載の外部調節デバイス。
- 前記コントローラは、当該外部調節デバイスのハウジングに取り外し可能に接続されるように構成されている、請求項11に記載の外部調節デバイス。
- 前記コントローラは、ハンドヘルド電子デバイスを含む、請求項11に記載の外部調節デバイス。
- パワーストレージデバイスをさらに含む、請求項6に記載の外部調節デバイス。
- 前記パワーストレージデバイスはバッテリを含む、請求項14に記載の外部調節デバイス。
- 前記ドライバの回転速度及び前記磁気要素の回転速度のうちの1つ又は複数を監視するように構成されている回転速度センサをさらに含む、請求項6に記載の外部調節デバイス。
- ここで、コントローラは、前記調節可能なインプラントの前記永久磁石の磁気結合状態及びストール状態のうちの1つ又は複数を決定するように構成される、請求項16に記載の外部調節デバイス。
- ここで、決定は、高速フーリエ変換(FFT)を使用して加速度アレイを変換することによって行われる、請求項17に記載の外部調節デバイス。
- ここで、前記決定は、前記高速フーリエ変換(FFT)の第3高調波を観察することによって行われる、請求項18に記載の外部調節デバイス。
- インプラントを非侵襲的に調節するための外部調節デバイスであって、当該外部調節デバイスは、
コントローラ;
モータ;及び
前記モータに回転可能に結合された少なくとも1つの磁石;
を含み、
ここで、当該外部調節デバイスを調節可能なインプラントの近くに配置すると、前記少なくとも1つの磁石は、前記調節可能なインプラントの永久磁石と磁気的に結合するように構成され;且つ、
ここで、前記少なくとも1つの磁石が動くと、前記コントローラは、前記少なくとも1つの磁石と前記調節可能なインプラントの前記永久磁石との磁気結合状態を検出するように構成される;
外部調節デバイス。 - ここで、前記コントローラによって検出される前記磁気結合状態は、結合状態及び非結合状態のうちの一方である、請求項20に記載の外部調節デバイス。
- ここで、前記コントローラは、前記モータの回転速度を決定するように構成される、請求項20に記載の外部調節デバイス。
- ここで、前記少なくとも1つの磁石と前記調節可能なインプラントの前記永久磁石との結合状態を決定するのに、前記コントローラは、前記回転速度を使用する、請求項22に記載の外部調節デバイス。
- ここで、前記コントローラは、前記モータの加速度を決定するように構成されている、請求項20に記載の外部調節デバイス。
- ここで、前記少なくとも1つの磁石と前記調節可能なインプラントの前記永久磁石とのストーリング(stalling)状態を決定するのに、前記コントローラは、前記モータの加速度を使用する、請求項22に記載の外部調節デバイス。
- ここで、前記決定は、高速フーリエ変換(FFT)を使用して加速度アレイを変換することによって行われる、請求項25に記載の外部調節デバイス。
- ここで、前記決定は、前記高速フーリエ変換(FFT)の第3高調波を観察することによって行われる、請求項18に記載の外部調節デバイス。
- ここで、前記コントローラは、前記モータと無線で通信し、且つ前記モータを制御するように構成されている、請求項20に記載の外部調節デバイス。
- 前記コントローラはスマートフォンを含む、請求項20に記載の外部調節デバイス。
- パワーストレージデバイスをさらに含む、請求項20に記載の外部調節デバイス。
- ここで、前記パワーストレージデバイスはバッテリである、請求項30に記載の外部調節デバイス。
- メモリを含む、請求項20に記載の外部調節デバイス。
- 情報をユーザに伝達するように構成されたディスプレイを含む、請求項20に記載の外部調節デバイス。
- ここで、前記ユーザに伝達される前記情報は、前記少なくとも1つの磁石と前記調節可能なインプラントの前記永久磁石との磁気結合状態を含む、請求項33に記載の外部調節デバイス。
- ここで、前記ユーザに伝達される前記情報は、前記調節可能なインプラントの寸法及び前記調節可能なインプラントにかかる力のうちの少なくとも1つの変化の量を含む、請求項33に記載の外部調節デバイス。
- ここで、前記ユーザに伝達される前記情報は、前記少なくとも1つの磁石及び前記調節可能なインプラントの前記永久磁石のうちの1つ又は複数の回転速度を含む、請求項33に記載の外部調節デバイス。
- ここで、前記コントローラは、所定の限界を超える移植可能な医療デバイスの寸法の変化を防ぐように構成される、請求項20に記載の外部調節デバイス。
- インプラントを非侵襲的に調節するための外部調節デバイスであって、当該外部調節デバイスは、
コントローラ;
モータ;及び
前記モータに回転可能に結合された少なくとも1つの磁石;
を含み、
ここで、当該外部調節デバイスを調節可能なインプラントの近くに配置すると、前記少なくとも1つの磁石は、前記調節可能なインプラントの永久磁石と磁気的に結合するように構成され;且つ、
ここで、前記少なくとも1つの磁石が動くと、前記コントローラは、前記少なくとも1つの磁石と前記調節可能なインプラント内に配置された磁石との磁気結合状態を決定するように構成される;
外部調節デバイス。 - ここで、前記コントローラは、前記モータの回転速度を監視する、請求項38に記載の外部調節デバイス。
- ここで、前記コントローラは、1つ又は複数のセンサを使用して、前記少なくとも1つの磁石の回転速度を監視する、請求項38に記載の外部調節デバイス。
- 前記1つ又は複数のセンサは磁気センサを含む、請求項40に記載の外部調節デバイス。
- 前記磁気センサはホール効果センサを含む、請求項41に記載の外部調節デバイス。
- インプラントを調節するための方法であって、以下のステップ:
調節可能なインプラントの近くに外部調節デバイスを位置決めするステップ;
前記外部調節デバイスの少なくとも1つの磁石を前記調節可能なインプラントの永久磁石と結合するステップ;
前記外部調節デバイスの前記少なくとも1つの磁石を回転させることによって変化する磁場を生成するステップ;
前記外部調節デバイスの前記少なくとも1つの磁石の回転速度を監視して、前記少なくとも1つの磁石と前記調節可能なインプラントの前記永久磁石との磁気結合状態を決定するステップ;
を含む方法。 - 外部調節デバイスの特性プロファイルを取得するための方法であって、以下のステップ:
前記外部調節デバイスの磁石を回転させるステップ;
前記磁石の回転中に加速度アレイを測定するステップ;
前記加速度アレイの加速度ピークを決定するステップ;
前記加速度アレイを中央のピークにシフトするステップ;及び
平均化されたアレイを前記外部調節デバイスの特性プロファイルとして保存するステップ;
を含む方法。 - 外部調節デバイスの磁石と調節可能なインプラントの永久磁石との結合状態を決定するための方法であって、以下のステップ:
前記外部調節デバイスの磁石を回転させるステップ;
前記磁石の回転中に加速度アレイを測定するステップ;
前記加速度アレイの加速度ピークを決定するステップ;
前記加速度アレイを中央のピークにシフトするステップ;
テストアレイを取得するために、前記外部調節デバイスの特性プロファイルから平均化されたアレイを差し引くステップ;及び
前記テストアレイのピークツーピーク振幅をしきい値と比較するステップであり、ここで、前記テストアレイのピークツーピーク振幅が前記しきい値よりも大きい場合、結合状態が決定され、且つここで、前記テストアレイのピークツーピーク振幅が前記しきい値よりも小さい場合、非結合状態が決定される、ステップ;
を含む方法。 - 外部調節デバイスを使用して調節可能なインプラントの永久磁石のストールド(stalled)状態を決定するための方法であって、以下のステップ:
前記外部調節デバイスの磁石を回転させるステップ;
前記磁石の回転中に加速度アレイを測定するステップ;
前記加速度アレイの加速度ピークを決定するステップ;
前記加速度アレイを中央のピークにシフトするステップ;
テストアレイを取得するために、前記外部調節デバイスの特性プロファイルから平均化されたアレイを差し引くステップ;
前記テストアレイに対して高速フーリエ変換(FFT)分析を実行するステップ;及び
第3高調波を観察するステップであり、ここで、第3高調波は、しきい値を表す及びしきい値を超える値のうちの1つ以上である場合、ストールド状態が決定され、且つここで、しきい値が欠落する及びしきい値を下回る値のうちの1つ以上である場合、ストールド状態は検出されず、前記磁石が結合されるステップ;
を含む方法。
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Publication number | Priority date | Publication date | Assignee | Title |
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US11589901B2 (en) | 2019-02-08 | 2023-02-28 | Nuvasive Specialized Orthopedics, Inc. | External adjustment device |
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US20200253643A1 (en) | 2020-08-13 |
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