JP6674385B2 - 神経測定の改善 - Google Patents
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Description
この出願は、2014年5月5日に出願された豪州仮特許出願第2014901639号明細書の利益を主張し、同特許は、参照により、本明細書に組み込まれる。
刺激電極から神経組織に電気刺激を印加するステップと、
刺激電極がその間に開離される遅延を与えるステップと、
遅延の間に、刺激に反応して検知電極と組織との界面に生じる電圧が、検知電極で見られる神経反応電圧の評価を可能にするレベルに制約されるように、検知電極間のインピーダンスが十分に大きいことを保証しながら、測定増幅器を用いて検知電極に存在する神経反応信号を測定するステップと
を含む、方法を提供する。
1つまたは複数の公称刺激電極および1つまたは複数の公称検知電極を含む複数の電極と、
神経反応を誘発するために、1つまたは複数の刺激電極から神経組織に伝達される刺激を提供するための刺激源と、
1つまたは複数の検知電極で検知された神経反応信号を増幅するための測定増幅器であって、刺激に反応して検知電極と組織との界面に生じる電圧が、検知電極で見られる神経反応電圧の評価を可能にするレベルに制約されるように、検知電極間のインピーダンスが十分に大きい、測定増幅器と、
神経組織への刺激の印加および誘発神経反応の測定を制御するように構成された制御ユニットであって、刺激電極から神経組織に電気刺激を印加するように構成され、刺激電極がその間に開離される遅延を与えるようにさらに構成され、遅延の間に、測定増幅器を用いて検知電極に存在する神経反応信号を測定するようにさらに構成された制御ユニットと
を備える、移植可能デバイスを提供する。
ZCは、その検知電極または各検知電極の定位相要素インピーダンスであり、
Vs1−Vs2は、刺激に反応して検知電極と組織との界面に生じる差動電圧であり、
VEは、検知電極で見られる神経反応電圧である。
ZIN>AxZC(Vs1−Vs2)/VE
によって制限することができる。
Aは、(VS1−VS2)分のVEに十分なマージンを与えるために提供されたスカラであり、例えば、2〜5の範囲であり得る。あるいは、指数関数減算によるアーチファクト補償を利用する実施形態では、Aは、0.5以上の範囲であり得る一方で、依然として、神経反応の評価を可能にし、従って、そのような実施形態は、本発明の範囲内である。その上、いくつかの実施形態は、その内容が参照により本明細書に組み込まれる、本出願人による豪州仮特許出願第2013904519号明細書の教示に従って、測定値から神経反応を抽出するために、フィルタテンプレートに対して測定値を相関させることができ、そのような実施形態では、Aは、0.067以上の範囲であり得る一方で、依然として、神経反応の評価を可能にし、従って、そのような実施形態は、本発明の範囲内である。
・ 電極1上のCPE上の電圧は変化する。このことは、シングルエンド測定e2−e1でまたは刺激電極e1上で見られる。この電圧はe2とe3との間の共通モードであるため、このことは、差動測定では見られない。
・ 電流源出力インピーダンスが有限である場合は、電極1のCPE電圧の変化により、電流は、広がり抵抗中を流れる。これは、電極e2およびe3上では差動的に現れる。このことは、広がり抵抗のメッシュ性質にのみ起因して起こる。スター型抵抗器または一列の抵抗器によってモデル化される場合は、このことは観察されない。
・ 検知増幅器のいずれかの入力インピーダンスが有限である場合は、刺激の間は、電流はこの負荷に流入する。次いで、これは安定するようになる。
V(r,t)=4.1x10−2/(Rxt)
である。
V(100k,1ms)=400uV
である。
V(C,t)=−7.14x101xC/t
である。
Claims (20)
- 刺激に対する神経反応を測定するためのデバイスの作動方法であって、
前記デバイスの制御ユニットが、刺激電極に電気刺激を印加するステップと、
前記制御ユニットが、前記刺激電極がその間に開離される遅延を与えるステップと、
前記遅延の間に、前記制御ユニットが、前記刺激に反応して検知電極と組織との界面に生じる電圧が、前記検知電極で見られる神経反応電圧の評価を可能にするレベルに制約されるように、前記検知電極間のインピーダンスが十分に大きいことを保証しながら、測定増幅器を用いて前記検知電極に存在する神経反応信号を測定するステップと
を含む、方法。 - 前記神経反応の差動測定が、2つの検知電極を使用することによって得られ、前記刺激に反応して前記検知電極と組織との界面に生じる前記電圧が、前記刺激に反応して前記2つの検知電極間に生じる差動電圧である、請求項1に記載の方法。
- ZINが、
ZIN>AxZC(Vs1−Vs2)/VE
によって制限され、
Aが、(VS1−VS2)分のVEに十分なマージンを与えるために提供されたスカラである、請求項3に記載の方法。 - Aが0.067より大きい、請求項4に記載の方法。
- Aが0.5より大きい、請求項4に記載の方法。
- Aが1より大きい、請求項4に記載の方法。
- Aが2より大きい、請求項4に記載の方法。
- 前記検知電極と前記測定増幅器との間の直列の検知電極コンデンサを提供するステップをさらに含み、前記検知電極コンデンサが、前記刺激に反応して前記コンデンサの両端間に生じる前記電圧が、前記検知電極で見られる前記神経反応電圧の評価を可能にするレベルに制約されることを保証する静電容量を有するように選ばれる、請求項1〜8のいずれか一項に記載の方法。
- 時間をかけて神経測定値を繰り返し得て、所定の刺激に対する前記神経反応の変化をモニタするステップをさらに含む、請求項1〜9のいずれか一項に記載の方法。
- 患者に届ける療法のフィードバック制御を提供するステップをさらに含む、請求項10に記載の方法。
- 刺激に対する神経反応を測定するための移植可能デバイスであって、
1つまたは複数の公称刺激電極および1つまたは複数の公称検知電極を含む複数の電極と、
神経反応を誘発するために、前記1つまたは複数の刺激電極から神経組織に伝達される刺激を提供するための刺激源と、
前記1つまたは複数の検知電極で検知された神経反応信号を増幅するための測定増幅器であって、前記刺激に反応して前記検知電極と組織との界面に生じる電圧が、前記検知電極で見られる神経反応電圧の評価を可能にするレベルに制約されるように、前記検知電極間のインピーダンスが十分に大きい、測定増幅器と、
前記神経組織への刺激の印加および誘発神経反応の測定を制御するように構成された制御ユニットであって、前記刺激電極から神経組織に電気刺激を印加するように構成され、前記刺激電極がその間に開離される遅延を与えるようにさらに構成され、前記遅延の間に、前記測定増幅器を用いて前記検知電極に存在する神経反応信号を測定するようにさらに構成された制御ユニットと
を備える、デバイス。 - 前記制御ユニットが、2つの検知電極を使用することによって前記神経反応の差動測定を得るようにさらに構成され、前記刺激に反応して前記検知電極と組織との界面に生じる前記電圧が、前記刺激に反応して前記2つの検知電極間に生じる差動電圧である、請求項12に記載のデバイス。
- ZINが、
ZIN>AxZC(Vs1−Vs2)/VE
によって制限され、
Aが、(VS1−VS2)分のVEに十分なマージンを与えるために提供されたスカラである、請求項14に記載のデバイス。 - Aが0.067より大きい、請求項15に記載のデバイス。
- Aが0.5より大きい、請求項15に記載のデバイス。
- Aが1より大きい、請求項15に記載のデバイス。
- Aが2より大きい、請求項15に記載のデバイス。
- 前記検知電極または各検知電極と前記測定増幅器との間の直列の検知電極コンデンサをさらに備え、前記検知電極コンデンサまたは各検知電極コンデンサが、前記刺激に反応して前記コンデンサの両端間に生じる前記電圧が、前記検知電極で見られる前記神経反応電圧の評価を可能にするレベルに制約されることを保証する静電容量を有する、請求項13〜17のいずれか一項に記載のデバイス。
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2014901639 | 2014-05-05 | ||
| AU2014901639A AU2014901639A0 (en) | 2014-05-05 | Improved Neural Measurement | |
| PCT/AU2015/050215 WO2015168735A1 (en) | 2014-05-05 | 2015-05-05 | Improved neural measurement |
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|---|---|
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| JP6674385B2 true JP6674385B2 (ja) | 2020-04-01 |
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| US (3) | US10368762B2 (ja) |
| EP (1) | EP3139999B1 (ja) |
| JP (1) | JP6674385B2 (ja) |
| CN (1) | CN106659894B (ja) |
| AU (1) | AU2015255631B2 (ja) |
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| SG184395A1 (en) | 2010-04-01 | 2012-11-29 | Ecole Polytech | Device for interacting with neurological tissue and methods of making and using the same |
| JP5778267B2 (ja) | 2010-06-18 | 2015-09-16 | カーディアック ペースメイカーズ, インコーポレイテッド | 誘発反応を使用する制御を備えた神経刺激システム |
| WO2012155189A1 (en) | 2011-05-13 | 2012-11-22 | National Ict Australia Ltd | Method and apparatus for estimating neural recruitment - f |
| US10588524B2 (en) | 2011-05-13 | 2020-03-17 | Saluda Medical Pty Ltd | Method and apparatus for measurement of neural response |
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| EP3139999B1 (en) | 2020-04-08 |
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