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US5814090A
Expired / Lapsed
US
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Implantable medical device having heat-shrink conforming shield
Assignee: MGC Diagnostics Corp
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Filing: 1996-11-18
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Granted: 1998-09-29
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Expires: 2016-11-18
Abstract
Abstract An implantable medical device, such as an implantable cardioverter defibrillator (ICD), utilizes a heat-shrink conforming shield to substantially isolate internal components and circuitry from the device housing and from each other. Preferably, the shield also protects the internal circuitry of the device from undesirable electro-magnetic coupling effects. The shape conforming isolation material provides an inexpensive, effective isolation barrier that helps shield the circuitry from undesired coupling effects and also protects the components from inadvertent shorts as well as potential damage during assembly and testing.
Inventors
- 👤 Scott T. Latterell
- 👤 Dennis Brumwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:21
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/18; A61N1/32; A61N1/36; A61N1/372; A61N1/375; A61N1/38; A61N1/39; A61N1/3956; A61N1/3758
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
121 words
An implantable cardioverter defibrillator (ICD) device capable of subcutaneous positioning within a patient, the implantable cardioverter defibrillator comprising: a housing comprising a biocompatible material at least a portion of which is conductive and used as an electrode for the ICD device; circuitry positioned within the housing to control delivery of cardioversion/defibrillation countershocks, wherein the circuitry is susceptible to undesirable coupling effects; an energy source coupled to the circuitry; a capacitive energy storage system coupled to the energy source and the circuitry; a first shape conforming isolation material encapsulating the circuitry inside the housing, a thin layer of conductive shielding material surrounding the first shape conforming isolation material; and a second shape conforming isolation material encapsulating the thin layer of shielding material.
Claim 2
Dependent Claim
121 words
An implantable cardioverter defibrillator (ICD) device capable of subcutaneous positioning within a patient, the implantable cardioverter defibrillator comprising: a housing comprising a biocompatible material at least a portion of which is conductive and used as an electrode for the ICD device; circuitry positioned within the housing to control delivery of cardioversion/defibrillation countershocks, wherein the circuitry is susceptible to undesirable coupling effects; an energy source coupled to the circuitry; a capacitive energy storage system coupled to the energy source and the circuitry; a first shape conforming isolation material encapsulating the circuitry inside the housing, a thin layer of conductive shielding material surrounding the first shape conforming isolation material; and a second shape conforming isolation material encapsulating the thin layer of shielding material.
Claim 3
Dependent Claim
21 words
The device of claim 1 wherein the first shape conforming material encapsulates the energy source and the capacitive energy storage system.
Claim 4
Dependent Claim
27 words
The device of claim 1 wherein the housing includes a portion which is utilized as an electrode operatively coupled with the circuitry to deliver the cardioversion/defibrillation countershocks.
Claim 5
Dependent Claim
27 words
The device of claim 1 wherein each shape conforming isolation material is made of a material selected from the set consisting of polyolefin, neoprene, polyvinyl or polyester.
Claim 6
Dependent Claim
22 words
The device of claim 1 wherein the shielding material is incorporated onto an inner surface of the second shape conforming isolation material.
Claim 7
Dependent Claim
72 words
An implantable medical device comprising: a sealed housing made of a biocompatible conductive metallic material; circuitry positioned within the housing; at least a first heat-shrink shape conforming isolation material encapsulating a portion of the circuitry to shield the portion of the circuitry from the housing; a thin layer of conductive shielding material surrounding the first shape conforming isolation material; and a second shape conforming isolation material encapsulating the layer of shielding material.
Claim 8
Dependent Claim
72 words
An implantable medical device comprising: a sealed housing made of a biocompatible conductive metallic material; circuitry positioned within the housing; at least a first heat-shrink shape conforming isolation material encapsulating a portion of the circuitry to shield the portion of the circuitry from the housing; a thin layer of conductive shielding material surrounding the first shape conforming isolation material; and a second shape conforming isolation material encapsulating the layer of shielding material.
Claim 9
Dependent Claim
19 words
The device of claim 6 wherein the shape conforming isolation material substitutes for a frame for holding the circuitry.
Claim 10
Dependent Claim
23 words
The device of claim 6 wherein the shape conforming isolation material is selected from the set consisting of: polyolefin, neoprene, polyvinyl or polyester.
Claim 11
Dependent Claim
41 words
The device of claim 6 wherein the shielding material is incorporated onto a surface selected from the set consisting of: an inner surface of the second shape conforming isolation material or an outer surface of the first shape conforming isolation material.
Claim 12
Dependent Claim
22 words
The device of claim 6 wherein the second shape conforming material has a higher dielectric constant that the first shape conforming material.
Claim 13
Dependent Claim
20 words
The device of claim 6 wherein the first shape conforming material is mechanically stronger than the second shape conforming material.
Claim 14
Dependent Claim
73 words
An implantable medical device comprising: a sealed housing made of a biocompatible conductive metallic material; circuitry positioned within the housing; at least a first shape conforming isolation material adhered to an inner surface of the housing to shield a portion of the circuitry from the housing; a thin layer of conductive shielding material surrounding the first shape conforming isolation material; and a second shape conforming isolation material encapsulating the layer of shielding material.
Claim 15
Dependent Claim
73 words
An implantable medical device comprising: a sealed housing made of a biocompatible conductive metallic material; circuitry positioned within the housing; at least a first shape conforming isolation material adhered to an inner surface of the housing to shield a portion of the circuitry from the housing; a thin layer of conductive shielding material surrounding the first shape conforming isolation material; and a second shape conforming isolation material encapsulating the layer of shielding material.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-09-28 | 2002-03-30 | 2002-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-09-28 | 2006-03-30 | 2006-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-09-28 | 2010-03-30 | 2010-09-29 | $7700.00 | Window Closed / Lapsed |