US5498248A
Expired / Lapsed
US
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Iontophoretic structure for medical devices
Assignee: BRIDGE BLOOD TECHNOLOGIES NEW YORK LLC LLC
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Filing: 1994-03-14
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Granted: 1996-03-12
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Expires: 2014-03-14
Abstract
Abstract An iontophoretic structure for medical devices is provided that uses controlled electrical current derived from two dissimilar galvanic materials to drive oligodynamic metal ions into solution to kill bacteria on and near the device to which the structure is affixed. In one embodiment, a first galvanic material separated from a second galvanic material by a resistive material produces an anti-bacterial current flow when placed in contact with an electrolytic fluid. In another embodiment, a cylindrical elastomeric catheter incorporates a first and a second galvanic material separated by a resistive material which controls a current flow between the galvanic materials when the catheter is immersed in an electrolytic fluid. The galvanic materials can be dissimilar metal powders embedded in a conductive polymer substrate that forms an iontophoretic composite material, or dissimilar metals arranged in layers separated by a resistive layer. In yet another embodiment, the iontophoretic composite material is configured as an infection control sleeve that covers a portion of an ordinary catheter or cannula. Methods of protecting implantable medical devices and body structures with the iontophoretic structures are also provided.
Inventors
- 👤 Fredric L. Milder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:02
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/18; A61N1/20; A61N1/30; A61N1/303; A61N1/306
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
66 words
An iontophoretic structure comprising: a first material having a first galvanic electrical potential; a second material having a second galvanic electrical potential and a conductive polymer separating said first material from said second material, said conductive polymer having a predetermined resistivity and controlling a current flow produced between said first material and said second material when said iontophoretic structure is in contact with an electrolytic fluid.
Claim 2
Dependent Claim
66 words
An iontophoretic structure comprising: a first material having a first galvanic electrical potential; a second material having a second galvanic electrical potential and a conductive polymer separating said first material from said second material, said conductive polymer having a predetermined resistivity and controlling a current flow produced between said first material and said second material when said iontophoretic structure is in contact with an electrolytic fluid.
Claim 3
Dependent Claim
18 words
The iontophoretic structure of claim 1, wherein said first material comprises silver and said second material comprises gold.
Claim 4
Dependent Claim
18 words
The iontophoretic structure of claim 1, wherein said first material comprises silver and said second material comprises platinum.
Claim 5
Dependent Claim
18 words
The iontophoretic structure of claim 1, wherein said first material comprises silver and said second material comprises copper.
Claim 6
Dependent Claim
23 words
The iontophoretic structure of claim 1, wherein said conductive polymer is chosen from the group consisting of polyvinyl, polyester, polyethylene, polyurethane, and polyvinylidene.
Claim 7
Dependent Claim
36 words
The iontophoretic structure of claim 1, wherein said first material includes a first metal powder and said second material includes a second metal powder, said first and said second metal powders embedded in said conductive polymer.
Claim 8
Dependent Claim
117 words
An iontophoresis catheter comprising: an elastomeric cylindrical wall having an outer wall surface and an inner wall surface, said inner wall surface defining a lumen for containing a fluid, and a distal end and a proximal end, each said end having at least one opening to permit introduction or evacuation of said fluid from said lumen, said wall comprising a first material having a first galvanic electrical potential and a second material having a second galvanic electrical potential, said first and second materials separated by a conductive polymer having a predetermined resistivity for controlling a current flow produced between said first material and said second material when said iontophoresis catheter is in contact with an electrolytic fluid.
Claim 9
Dependent Claim
117 words
An iontophoresis catheter comprising: an elastomeric cylindrical wall having an outer wall surface and an inner wall surface, said inner wall surface defining a lumen for containing a fluid, and a distal end and a proximal end, each said end having at least one opening to permit introduction or evacuation of said fluid from said lumen, said wall comprising a first material having a first galvanic electrical potential and a second material having a second galvanic electrical potential, said first and second materials separated by a conductive polymer having a predetermined resistivity for controlling a current flow produced between said first material and said second material when said iontophoresis catheter is in contact with an electrolytic fluid.
Claim 10
Dependent Claim
18 words
The iontophoresis catheter of claim 7, wherein said first material comprises silver and said second material comprises gold.
Claim 11
Dependent Claim
18 words
The iontophoresis catheter of claim 7, wherein said first material comprises silver and said second material comprises platinum.
Claim 12
Dependent Claim
18 words
The iontophoresis catheter of claim 7, wherein said first material comprises silver and said second material comprises copper.
Claim 13
Dependent Claim
23 words
The iontophoresis catheter of claim 7, wherein said conductive polymer is chosen from the group consisting of polyvinyl, polyurethane, polyester, polyethylene, and polyvinylidene.
Claim 14
Dependent Claim
61 words
The iontophoresis catheter of claim 7, wherein said first material comprises a first metal powder, said second material comprises a second metal powder, and said wall comprises said conductive polymer, said first and said second metal powder embedded in said conductive polymer, wherein said conductive polymer controls a current flow produced between said first metal powder and said second metal powder.
Claim 15
Dependent Claim
32 words
The iontophoresis catheter of claim 12, wherein said first and second metal powder, and said conductive polymer comprise a composite material extruded to form at least part of said cylindrical elastomeric wall.
Claim 16
Dependent Claim
35 words
The iontophoresis catheter of claim 12, wherein said first and second metal powder, and said conductive polymer comprise a liquified composite material into which said cylindrical elastomeric wall is dipped to form a composite coating.
Claim 17
Dependent Claim
102 words
An iontophoresis catheter comprising: an elastomeric cylindrical wall having an outer wall surface and an inner wall surface, said inner wall surface defining a lumen for containing a fluid, and a distal end and a proximal end, each said end having at least one opening to permit introduction or evacuation of said fluid from said lumen, said elastomeric cylindrical wall comprising a first metal powder and a second metal powder embedded in a conductive polymer having a predetermined resistivity for controlling a current flow produced between said first and second metal powder when said iontophoresis catheter is contact with an electrolytic fluid.
Claim 18
Dependent Claim
102 words
An iontophoresis catheter comprising: an elastomeric cylindrical wall having an outer wall surface and an inner wall surface, said inner wall surface defining a lumen for containing a fluid, and a distal end and a proximal end, each said end having at least one opening to permit introduction or evacuation of said fluid from said lumen, said elastomeric cylindrical wall comprising a first metal powder and a second metal powder embedded in a conductive polymer having a predetermined resistivity for controlling a current flow produced between said first and second metal powder when said iontophoresis catheter is contact with an electrolytic fluid.
References Cited (Backward Citations)
US3659588A
Cited
US3964477A
Cited
US4027393A
Cited
US4564361A
Cited
US4054139A
Cited
US4126937A
Cited
GB1582016A
Cited
US4313438A
Cited
US4308859A
Cited
US4476590A
Cited
US4483688A
Cited
US4411648A
Cited
US4474570A
Cited
US4603152A
Cited
US4569673A
Cited
US4886505A
Cited
EP0206024A2
Cited
DE3830359A1
Cited
US5154165A
Cited
US5057072A
Cited
US4886075A
Cited
US5049140A
Cited
US5084006A
Cited
WO1991016946A1
Cited
US5328451A
Cited
US5421982A
Cited
US5324275A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-03-12 | 1999-09-11 | 2000-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-03-12 | 2003-09-11 | 2004-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-03-12 | 2007-09-11 | 2008-03-12 | $7700.00 | Window Closed / Lapsed |