JP4201707B2 - 埋め込み可能医療デバイスの雑音を低減するシステム - Google Patents
埋め込み可能医療デバイスの雑音を低減するシステム Download PDFInfo
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- JP4201707B2 JP4201707B2 JP2003526483A JP2003526483A JP4201707B2 JP 4201707 B2 JP4201707 B2 JP 4201707B2 JP 2003526483 A JP2003526483 A JP 2003526483A JP 2003526483 A JP2003526483 A JP 2003526483A JP 4201707 B2 JP4201707 B2 JP 4201707B2
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N1/00—Electrotherapy; Circuits therefor
- A61N1/18—Applying electric currents by contact electrodes
- A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
- A61N1/38—Applying electric currents by contact electrodes alternating or intermittent currents for producing shock effects
- A61N1/39—Heart defibrillators
- A61N1/3975—Power supply
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N1/00—Electrotherapy; Circuits therefor
- A61N1/18—Applying electric currents by contact electrodes
- A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
- A61N1/36—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
- A61N1/362—Heart stimulators
- A61N1/37—Monitoring; Protecting
- A61N1/3718—Monitoring of or protection against external electromagnetic fields or currents
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N1/00—Electrotherapy; Circuits therefor
- A61N1/18—Applying electric currents by contact electrodes
- A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
- A61N1/38—Applying electric currents by contact electrodes alternating or intermittent currents for producing shock effects
- A61N1/39—Heart defibrillators
- A61N1/3975—Power supply
- A61N1/3981—High voltage charging circuitry
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S128/00—Surgery
- Y10S128/901—Suppression of noise in electric signal
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- Health & Medical Sciences (AREA)
- Cardiology (AREA)
- Heart & Thoracic Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Radiology & Medical Imaging (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Electrotherapy Devices (AREA)
- Prostheses (AREA)
- Materials For Medical Uses (AREA)
Description
[発明の概要]
本発明は、埋め込み可能医療デバイス内の誘導性要素によって生ずる雑音量を低減するシステムおよび方法を対象とする。特に、本発明は、埋め込み可能カーディオバータ/ディフィブリレータ(ICD)の高電圧コンデンサなどのエネルギー蓄積デバイスを充電するのに用いられる変圧器などの誘導性要素内で、電流を漸進的に停止させ、開始させるシステムを提供する。より漸進的なこの電流量の変化によって、デバイス内のグラウンドプレーンのシフトおよびそれに続く雑音スパイクがなくなる。次に、このことによって、心臓信号が、より正確に検知されることが可能になり、オーバセンシングがなくなり、不適切なショック送出の発生が最小になる。
本発明の先の実施形態の全てにおいて、コンデンサの充電は最大充電レートまで漸進的に増加する。30ジュールなどの所定のプログラムされたエネルギーレベルに達して、充電が完了したとコンデンサが判断すると、または、充電がマイクロプロセッサ78によってアボートされると、その後、充電は漸進的に減少する。このようにして、雑音スパイクの発生は大幅に低減され、それによって、P波およびR波のオーバセンシングの機会が最小になり、さらに、心臓調律を誤診する機会が最小になる。このことによって不必要なショック送出の可能性が減る。
Claims (13)
- 埋め込み可能医療デバイスであって、
電荷蓄積デバイスと、
前記電荷蓄積デバイスにエネルギーを蓄積するように結合し、前記電荷蓄積デバイスに対する充電イネーブル状態および充電ディセーブル状態を有する充電回路と、
前記充電回路に結合して、第1時間期間にわたって前記充電ディセーブル状態から前記充電イネーブル状態へ移行することを前記充電回路にさせる制御回路と、
を備え、
前記制御回路は、第2時間期間にわたって前記充電イネーブル状態から前記充電ディセーブル状態へ移行することを前記充電回路にさせる回路と、可変デューティサイクルを有するパルス列を生成する信号生成回路を含み、
前記パルス列のパルスのデューティサイクルは、前記第1時間期間にわたって増加して、前記充電ディセーブル状態から前記充電イネーブル状態へ移行することを前記充電回路にさせることができる埋め込み可能医療デバイス。 - 前記信号生成回路は、所定期間にわたって前記パルス列のパルスのデューティサイクルを減少させて、前記第2時間期間にわたって前記充電イネーブル状態から前記充電ディセーブル状態へ移行することを前記充電回路にさせる回路を含む請求項1に記載の埋め込み可能医療デバイス。
- 前記制御回路はパルス列を生成する信号生成回路を含み、前記パルス列のパルスの周波数は、前記第1時間期間にわたって増加して、前記充電ディセーブル状態から前記充電イネーブル状態へ移行することを前記充電回路にさせることができる請求項1に記載の埋め込み可能医療デバイス。
- 前記信号生成回路は、所定期間にわたって前記パルス列のパルスの周波数を変える回路をさらに含む請求項2に記載の埋め込み可能医療デバイス。
- 前記充電回路に近接したテレメトリ回路をさらに含み、前記制御回路は、前記充電回路が前記充電イネーブル状態にあるとき、所定の時間期間の間、充電動作を一時的に中断し、その後、前記充電動作が一時的に中断されている間に前記テレメトリ回路と前記埋め込み可能医療デバイスの外部のデバイスとの間の送信を可能にする回路をさらに含む請求項1に記載の埋め込み可能医療デバイス。
- 前記電荷蓄積デバイスは、高電圧コンデンサである請求項1に記載の埋め込み可能医療デバイス。
- 前記充電回路は、誘導性要素を含む請求項1に記載の埋め込み可能医療デバイス。
- 埋め込み可能医療デバイス(IMD)において用いるための方法であって、該埋め込み可能医療デバイスはグラウンドプレーンおよび電荷蓄積デバイスを含み、
a)前記電荷蓄積デバイスへの電荷の蓄積を開始させるステップと、
b)前記埋め込み可能医療デバイスのグラウンドプレーンをほぼ一定の電位に維持するように、電荷を蓄積するレートを制御するステップと、
を含む埋め込み可能医療デバイスにおいて用いるための方法。 - 前記ステップb)は、ほぼ全く電荷が蓄積されないレートから第2のレートへ、電荷の蓄積レートを増加させることを含む請求項8に記載の埋め込み可能医療デバイスにおいて用いるための方法。
- 前記第2のレートからほぼ全く電荷が蓄積されない状態へ、電荷の蓄積レートを減少させることをさらに含む請求項9に記載の埋め込み可能医療デバイスにおいて用いるための方法。
- 前記ステップb)は、パルス列を含む信号を利用することを含み、前記パルス列のパルスの少なくともいくつかは可変デューティサイクルを有して充電レートを制御するようにする請求項10に記載の埋め込み可能医療デバイスにおいて用いるための方法。
- 前記ステップb)は、パルス列を含む信号を利用することを含み、前記パルス列のパルスの少なくともいくつかは可変周波数を有して充電レートを制御するようにする請求項11に記載の埋め込み可能医療デバイスにおいて用いるための方法。
- 電荷の蓄積を一時的に中断すること、および、
電荷の蓄積を中断している間に、前記埋め込み可能医療デバイスと外部デバイスとの間で通信オペレーションを実行すること、
をさらに含む請求項11または12に記載の埋め込み可能医療デバイスにおいて用いるための方法。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/948,069 US6754527B2 (en) | 2001-09-06 | 2001-09-06 | System and method for reducing noise in an implantable medical device |
PCT/US2002/028036 WO2003022358A1 (en) | 2001-09-06 | 2002-09-04 | A system for reducing noise in an implantable medical device |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2005501676A JP2005501676A (ja) | 2005-01-20 |
JP4201707B2 true JP4201707B2 (ja) | 2008-12-24 |
Family
ID=25487210
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2003526483A Expired - Fee Related JP4201707B2 (ja) | 2001-09-06 | 2002-09-04 | 埋め込み可能医療デバイスの雑音を低減するシステム |
Country Status (7)
Country | Link |
---|---|
US (1) | US6754527B2 (ja) |
EP (1) | EP1427479B1 (ja) |
JP (1) | JP4201707B2 (ja) |
AT (1) | ATE418360T1 (ja) |
CA (1) | CA2459337A1 (ja) |
DE (1) | DE60230527D1 (ja) |
WO (1) | WO2003022358A1 (ja) |
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US6751502B2 (en) * | 2001-03-14 | 2004-06-15 | Cardiac Pacemakers, Inc. | Cardiac rhythm management system with defibrillation threshold prediction |
US7386344B2 (en) * | 2004-08-11 | 2008-06-10 | Cardiac Pacemakers, Inc. | Pacer with combined defibrillator tailored for bradycardia patients |
US7338433B2 (en) | 2002-08-13 | 2008-03-04 | Allergan, Inc. | Remotely adjustable gastric banding method |
EP2181655B1 (en) | 2002-08-28 | 2016-12-07 | Apollo Endosurgery, Inc. | Fatigue-restistant gastric banding device |
JP2007505724A (ja) * | 2003-09-22 | 2007-03-15 | イノベーション テクノロジーズ インコーポレーティッド | 創傷洗浄の装置および方法 |
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-
2001
- 2001-09-06 US US09/948,069 patent/US6754527B2/en not_active Expired - Lifetime
-
2002
- 2002-09-04 DE DE60230527T patent/DE60230527D1/de not_active Expired - Lifetime
- 2002-09-04 JP JP2003526483A patent/JP4201707B2/ja not_active Expired - Fee Related
- 2002-09-04 AT AT02759537T patent/ATE418360T1/de not_active IP Right Cessation
- 2002-09-04 WO PCT/US2002/028036 patent/WO2003022358A1/en active Application Filing
- 2002-09-04 CA CA002459337A patent/CA2459337A1/en not_active Abandoned
- 2002-09-04 EP EP02759537A patent/EP1427479B1/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE60230527D1 (de) | 2009-02-05 |
JP2005501676A (ja) | 2005-01-20 |
ATE418360T1 (de) | 2009-01-15 |
WO2003022358A1 (en) | 2003-03-20 |
US6754527B2 (en) | 2004-06-22 |
CA2459337A1 (en) | 2003-03-20 |
EP1427479B1 (en) | 2008-12-24 |
EP1427479A1 (en) | 2004-06-16 |
US20030045906A1 (en) | 2003-03-06 |
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