JP7263025B2 - インピーダンスセンシング及び接触測定を用いた心臓内瘢痕組織の識別 - Google Patents
インピーダンスセンシング及び接触測定を用いた心臓内瘢痕組織の識別 Download PDFInfo
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Description
本明細書に記載されている本発明の実施形態は、心臓内瘢痕組織の識別のためのシステム及び方法を提供するものである。いくつかの実施形態では、心臓の内壁の瘢痕及び健康な組織を表示するマップが作成される。このマップは、適当なアブレーション部位を選択すること、及び既にアブレーションされた箇所を除外することなど、瘢痕組織を識別することから利益を得ることができる任意の診断/治療手技に用いられ得る。
図1は、本発明の実施形態による、電子解剖学的マッピングのためのシステム21の模式的な描写図である。
図2は、本発明の実施形態による、患者25の心臓23の一部分の電子解剖学的マップ31の模式的な描写図である。
(1) システムであって、
患者の心臓の中に挿入されたプローブと通信する電気インターフェースと、
プロセッサであって、
前記電気インターフェースを介して、(i)前記心臓の内部表面上の所与の位置で前記プローブによって測定された電気インピーダンスの第1の表示と、(ii)前記電気インピーダンスの測定の間における前記プローブと前記心臓の前記内部表面との機械的接触の性質の第2の表示と、を受け取り、
前記第1及び第2の表示に基づいて、前記所与の位置の組織を瘢痕組織として分類するように構成された、プロセッサと、を備えるシステム。
(2) 前記プロセッサは、前記第2の表示に基づいて、前記瘢痕組織と血液とを区別するように構成されている、実施態様1に記載のシステム。
(3) 前記プロセッサは、前記組織が所与のベースラインインピーダンスよりも低いインピーダンスを有することを検知することによって、前記組織を前記瘢痕組織として分類するように構成されている、実施態様1に記載のシステム。
(4) 前記ベースラインインピーダンスは、前記心臓内における測定された血液インピーダンスを含む、実施態様3に記載のシステム。
(5) 前記ベースラインインピーダンスは、前記心臓の前記内部表面の一部分にわたって平均化された、測定された組織インピーダンスを含む、実施態様3に記載のシステム。
(7) 前記プロセッサは、前記心臓内における前記プローブのそれぞれの推定位置を前記第1の表示から算出するように構成されている、実施態様1に記載のシステム。
(8) 前記プロセッサは、前記プローブの前記推定位置を前記心臓の少なくとも一部のマップに組み込むことによって、前記マップを更新するように構成されている、実施態様7に記載のシステム。
(9) 前記プロセッサは、前記推定位置における前記測定された電気インピーダンスを用いて前記マップを更新するように構成されている、実施態様8に記載のシステム。
(10) 前記プロセッサは、数値及び視覚コーディングの少なくとも一方を用いて、前記マップ上で前記瘢痕組織を健康な組織と区別するように構成されている、実施態様8に記載のシステム。
患者の心臓に挿入されたプローブから、(i)前記心臓の内部表面上の所与の位置で前記プローブによって測定された電気インピーダンスの第1の表示と、(ii)前記電気インピーダンスの測定の間における前記プローブと前記心臓の前記内部表面との機械的接触の性質の第2の表示と、を受け取ることと、
前記第1及び第2の表示に基づいて、前記所与の位置の組織を瘢痕組織として分類することと、を含む方法。
(12) 前記組織を分類することは、前記第2の表示に基づいて、前記瘢痕組織と血液とを区別することを含む、実施態様11に記載の方法。
(13) 前記組織を分類することは、前記組織が所与のベースラインインピーダンスよりも低いインピーダンスを有することを検知することを含む、実施態様12に記載の方法。
(14) 前記ベースラインインピーダンスは、前記心臓内における測定された血液インピーダンスを含む、実施態様13に記載の方法。
(15) 前記ベースラインインピーダンスは、前記心臓の前記内部表面の一部分にわたって平均化された、測定された組織インピーダンスを含む、実施態様13に記載の方法。
(17) 前記心臓内における前記プローブのそれぞれの推定位置を前記第1の表示から算出することを含む、実施態様11に記載の方法。
(18) 前記プローブの前記推定位置を前記心臓の少なくとも一部のマップに組み込むことによって、前記マップを更新することを含む、実施態様17に記載の方法。
(19) 前記推定位置における前記測定された電気インピーダンスを用いて前記マップを更新することを含む、実施態様18に記載の方法。
(20) 数値及び視覚コーディングの少なくとも一方を用いて、前記マップ上で前記瘢痕組織を健康な組織と区別することを含む、実施態様18に記載の方法。
Claims (9)
- システムであって、
遠位端部に複数のアームを備え、前記アームのそれぞれに1つ又は複数の電極が結合されているカテーテルと、
前記カテーテルと通信する電気インターフェースと、
プロセッサであって、
前記電気インターフェースを介して、それぞれの前記電極について、(i)心臓の内部表面上の所与の位置で前記電極によって測定された電気インピーダンスの第1の測定データと、(ii)前記電気インピーダンスの測定の間における前記電極と前記心臓の前記内部表面との機械的接触の性質の第2の測定データと、を受け取り、
前記第1及び第2の測定データに基づいて、前記内部表面との機械的接触の質が十分であり、所与のベースラインインピーダンスより低いインピーダンスを有することを検出することにより、前記所与の位置の組織を瘢痕組織として分類するように構成された、プロセッサと、を備えるシステム。 - 前記プロセッサは、前記第2の測定データに基づいて、前記瘢痕組織と血液とを区別するように構成されている、請求項1に記載のシステム。
- 前記ベースラインインピーダンスが、前記心臓内における測定された血液インピーダンスである、請求項1に記載のシステム。
- 前記ベースラインインピーダンスが、前記心臓の前記内部表面の一部分にわたって平均化された、測定された組織インピーダンスである、請求項1に記載のシステム。
- 前記プロセッサは、前記カテーテルの遠位端部に取り付けられた1つ又は複数のセンサから前記第2の測定データを受け取るように構成されている、請求項1に記載のシステム。
- 患者に付される外部電極をさらに備え、
前記プロセッサは、前記心臓内における前記電極のそれぞれの推定位置を、前記外部電極の既知の位置及び前記第1の測定データに基づいて算出するように構成されている、請求項1に記載のシステム。 - 前記プロセッサは、前記電極の前記推定位置を前記心臓の少なくとも一部のマップに組み込むことによって、前記マップを更新するように構成されている、請求項6に記載のシステム。
- 前記プロセッサは、前記推定位置における前記測定された電気インピーダンスを用いて前記マップを更新するように構成されている、請求項7に記載のシステム。
- 前記プロセッサは、数値及び視覚コーディングの少なくとも一方を用いて、前記マップ上で前記瘢痕組織を健康な組織と区別するように構成されている、請求項7に記載のシステム。
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