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US007853325B2

(12) United States Patent ao) Patent No.: Us 7,853,325 B2

Dabney et al. (45) Date of Patent: *Dec. 14,2010

(54) CYLINDRICAL BANDSTOP FILTERS FOR MEDICAL LEAD SYSTEMS

(75) Inventors: Warren S. Dabney, Orchard Park, NY (US); Kenneth D. Billings, Aiken, SC (US); Bethany M. Hauser, Lockport, NY (US); Brenden Hill, Belfast, NY (US); Gabe Kustra, Cheektowaga, NY (US); Robert A. Stevenson, Canyon Country, CA (US)

(73) Assignee: Greatbatch Ltd., Clarence, NY (US)

( * ) Notice: Subject to any disclaimer, the term of this patent is extended or adjusted under 35 U.S.C. 154(b) by 531 days.

This patent is subject to a terminal disclaimer.

(21) Appl.No.: 11/943,854

(22) Filed: Nov. 21, 2007

(65) Prior Publication Data

US 2008/0116997 Al May 22, 2008

Related U.S. Application Data

(63) Continuation-in-part of application No. 11/558,349, filed on Nov. 9, 2006, which is a continuation-in-part of application No. 11/423,073, filed on Jun. 8, 2006, which is a continuation-in-part of application No. 10/123,534, filed on Apr. 15, 2002, now abandoned.

(60) Provisional application No. 60/283,725, filed on Apr. 13, 2001, provisional application No. 60/803,672, filed on Jun. 1, 2006, provisional application No. 60/597,125, filed on Nov. 11, 2005, provisional application No. 60/968,662, filed on Aug. 29, 2007.

(58) Field of Classification Search 607/2,

607/40, 115; 324/318 See application file for complete search history.

(56) References Cited

U.S. PATENT DOCUMENTS

3,871,382 A 3/1975 Mann

(Continued)
FOREIGN PATENT DOCUMENTS
EP 0243573 A2 11/1987

(Continued)

OTHER PUBLICATIONS

Ariel Roguin, et al., Modern Pacemaker and Implantable Cardioverter/Defibrillator Systems Can Be Magnetic Resonance Imaging Safe, Circulation—Journal of the American Heart Association, Aug. 4, 2004 (originally published online Jul. 26, 2004), pp. 475-482, American Heart Association, Dallas, Texas, USA.

(Continued)

Primary Examiner—George Manuel

(74) Attorney, Agent, or Firm—Kelly Lowry & Kelley, LLP

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A one-piece cylindrical bandstop filter for medical lead systems incorporates parallel capacitive and inductive elements in a compact cylindrical configuration. The compact cylindrical configuration of the bandstop filter does not add significantly to the size or weight of the medical lead system. Preferably, the bandstop filters are of biocompatible materials or hermetically sealed in biocompatible containers. The parallel capacitive and inductive elements are placed in series with the medical lead system, and are selected so as to resonate at one or more selected frequencies, typically MRI pulsed frequencies.

42 Claims, 8 Drawing Sheets

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