Patent US6236274B1 successfully refreshed from Google Patents.
US5964705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
MR-compatible medical devices
Assignee: IMAGE-GUIDED DRUG DELIVERY SYSTEMS Inc
•
Filing: 1997-08-22
•
Granted: 1999-10-12
•
Expires: 2017-08-22
Abstract
Abstract The use of devices in procedures, especially medical procedures where the events take place under view of Magnetic Resonance Imaging (MRI) systems is becoming more important. Although some general and specific structures have been discussed in the literature and commercialized, little has been done effectively to design devices for MRI procedures for specific tasks. The present invention describes a device for use within an organism, said device comprising an element having at least one pair of opposed RF receiver microcoils having a space between each microcoil of said pair of microcoils, the coils of said microcoils may have diameters of less than 2.4 mm. The device may also comprise an element having at least one pair of opposed RF receiver microcoils having a space between each microcoil of said pair of microcoils, said RF receiver microcoils each comprising at least three individual coils, said at least three individual coils of said microcoils having spacing between adjacent microcoils so that spacing between at least two pairs of individual coils within said microcoils differ by at least 10%. Circuitry may be insulated within the device by providing the wires and circuits within different layers in a coaxial layering of components within the catheter. The device may also comprise device an element having at least one pair of opposed RF receiver microcoils having a space between each microcoil of said pair of microcoils, the RF receiver microcoils each comprising at least three individual windings, the at least three individual windings of said microcoils having spacing between adjacent windings so that spacing between at least two pairs of individual windings within the microcoils differ by at least 10%.
Inventors
- 👤 Charles L. Truwit
- 👤 Haiying Liu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:14
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/48; A61B5/4836; A61B5/4839; A61B5/06; A61M; A61M25/00; A61M25/01; A61M25/0105; A61M25/0108
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
80 words
A medical device for use within a living organism, said medical device comprising: an element having at least one pair of opposed RF receiver microcoils having a space between each microcoil of said pair of microcoils, said RF receiver microcoils each comprising at least three individual windings, said at least three individual windings of said microcoils having spacing between adjacent windings so that spacing between at least two pairs of individual windings within said microcoils differ by at least 10%.
Claim 2
Dependent Claim
80 words
A medical device for use within a living organism, said medical device comprising: an element having at least one pair of opposed RF receiver microcoils having a space between each microcoil of said pair of microcoils, said RF receiver microcoils each comprising at least three individual windings, said at least three individual windings of said microcoils having spacing between adjacent windings so that spacing between at least two pairs of individual windings within said microcoils differ by at least 10%.
Claim 3
Dependent Claim
65 words
The medical device of claim 1 wherein at least one drug delivery port is present within said device and wherein said at least one drug delivery port is located so that at least some drug which is delivered through said port is delivered away from said device within a volume above said space between said individual microcoils of said at least one pair of microcoils.
Claim 4
Dependent Claim
19 words
The medical device of claim 2 wherein the windings of said microcoils have diameters of less than 2.4 mm.
Claim 5
Dependent Claim
32 words
The medical device of claim 1 wherein there are at least three separate ports within said device for delivery of drugs by at least three microcatheters within said device through said ports.
Claim 6
Dependent Claim
30 words
The medical device of claim 4 wherein within said device are at least three deflectors for directing each of said at least three microcatheters through said at least three ports.
Claim 7
Dependent Claim
69 words
The medical device of claim 1 wherein at least one set of microcoils comprising a half of said at least one pair of microcoils comprising at least four windings having at least three spaces between adjacent windings of dimensions spacing 1, spacing 2 and spacing three, wherein at least one of said at least three spaces does not equal the dimensions of at least one other of said spaces.
Claim 8
Dependent Claim
73 words
The medical device of claim 6 wherein a layer is present within said device which is radially exterior to a component selected from the group consisting of electrical wires and preamplifiers associated with said microcoils, said layer providing RF shielding for said electrical wires and/or any preamplifiers associated with said microcoils, and said layer being electrically insulated from components selected from the group consisting of electrical wires and preamplifiers associated with said microcoils.
Claim 9
Dependent Claim
210 words
A medical device for use within a living organism, said medical device comprising: an element having at least one pair of opposed RF receiver microcoils having a space between each microcoil of said pair of microcoils, said RF receiver microcoils each comprising at least three individual windings, said at least three individual windings of said microcoils having spacing between adjacent windings so that spacing between at least two pairs of individual windings within said microcoils differ by at least 10% wherein said at least one pair of RF receiver microcoils has a space between each half of said pair of microcoils, said at least one pair of RF receiver microcoils produces a field strength having a field strength maximum within a volume surrounding said space between each half of said pair of microcoils, and produces a second field strength at a position along a line parallel to an elongate axis of said device halfway between a midpoint position within said space and a near end of a microcoil forming a part of said at least one pair of RF receiver microcoils, said second field strength, along a line parallel to an elongate axis of said device, being no more than 40% less than said maximum field strength between said microcoils.
Claim 10
Dependent Claim
210 words
A medical device for use within a living organism, said medical device comprising: an element having at least one pair of opposed RF receiver microcoils having a space between each microcoil of said pair of microcoils, said RF receiver microcoils each comprising at least three individual windings, said at least three individual windings of said microcoils having spacing between adjacent windings so that spacing between at least two pairs of individual windings within said microcoils differ by at least 10% wherein said at least one pair of RF receiver microcoils has a space between each half of said pair of microcoils, said at least one pair of RF receiver microcoils produces a field strength having a field strength maximum within a volume surrounding said space between each half of said pair of microcoils, and produces a second field strength at a position along a line parallel to an elongate axis of said device halfway between a midpoint position within said space and a near end of a microcoil forming a part of said at least one pair of RF receiver microcoils, said second field strength, along a line parallel to an elongate axis of said device, being no more than 40% less than said maximum field strength between said microcoils.
Claim 11
Dependent Claim
22 words
The medical device of claim 8 wherein said second field strength is no more than 20% less than said maximum field strength.
Claim 12
Dependent Claim
19 words
The medical device of claim 9 wherein the windings of said microcoils have diameters of less than 2.4 mm.
Claim 13
Dependent Claim
19 words
The medical device of claim 8 wherein the windings of said microcoils have diameters of less than 2.4 mm.
Claim 14
Dependent Claim
64 words
The device of claim 8 wherein at least one drug delivery port is present within said device and wherein said at least one drug delivery port is located so that at least some drug which is delivered through said port is delivered away from said device within a volume above said space between said individual microcoils of said at least one pair of microcoils.
Claim 15
Dependent Claim
109 words
A medical device for use within an organism, said medical device comprising: an element having at least one pair of opposed RF receiver microcoils having a space between each microcoil of said pair of microcoils, coils of said microcoils having diameters of less than 2.4 mm wherein at least one set of microcoils comprising a half of said at least one pair of microcoils comprises at least four windings having at least three spaces between adjacent windings of dimensions spacing 1, spacing 2 and spacing three, wherein at least one of said at least three spaces does not equal the dimensions of at least one other of said spaces.
Claim 16
Dependent Claim
109 words
A medical device for use within an organism, said medical device comprising: an element having at least one pair of opposed RF receiver microcoils having a space between each microcoil of said pair of microcoils, coils of said microcoils having diameters of less than 2.4 mm wherein at least one set of microcoils comprising a half of said at least one pair of microcoils comprises at least four windings having at least three spaces between adjacent windings of dimensions spacing 1, spacing 2 and spacing three, wherein at least one of said at least three spaces does not equal the dimensions of at least one other of said spaces.
Claim 17
Dependent Claim
70 words
The medical device of claim 13 comprising an element having at least one pair of opposed RF receiver microcoils comprising: at least three windings in each of said microcoils, said windings having a space between each winding of said pair of microcoils, the windings of said microcoils having diameters of less than 2.4 mm and said at least one pair of opposed RF receiver microcoils consisting of a continuous winding.
Claim 18
Dependent Claim
18 words
The medical device of claim 14 wherein at least one drug delivery port is present within said device.
Claim 19
Dependent Claim
38 words
The medical device of claim 15 wherein said at least one drug delivery port is located so that a drug which is delivered through said port is delivered away from said device within said space between said microcoils.
Claim 20
Dependent Claim
63 words
The medical device of claim 14 wherein microcatheters are present within said device which extend outside of said device to deliver liquid material within a volume bordered by planes extending radially from the catheter at ends of the at least one pair of microcoils which volume bordered by planes defines the space between each microcoil within said at least one pair of microcoils.
Claim 21
Dependent Claim
24 words
The medical device of claim 14 wherein said at least one pair of microcoils is embedded within a binder material which surrounds a lumen.
Claim 22
Dependent Claim
33 words
The medical device of claim 18 wherein said at least one pair of microcoils is electrically connected to a preamplifier within a portion of said device which may be inserted into an organism.
Claim 23
Dependent Claim
33 words
The medical device of claim 14 wherein said at least one pair of microcoils is electrically connected to a preamplifier within a portion of said device which may be inserted into an organism.
References Cited (Backward Citations)
US4572198A
Cited
US4827931A
Cited
US5154179A
Cited
US4767973A
Cited
US5180982A
Cited
US5167625A
Cited
US5270485A
Cited
US5269882A
Cited
US5106455A
Cited
US5273622A
Cited
US5211165A
Cited
WO1993015874A2
Cited
WO1993015785A1
Cited
WO1993015872A1
Cited
US5271400A
Cited
US5375596A
Cited
US5451744A
Cited
WO1994027697A1
Cited
WO1996033761A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-10-11 | 2003-04-12 | 2003-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-10-11 | 2007-04-12 | 2007-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-10-11 | 2011-04-12 | 2011-10-12 | $7700.00 | Window Closed / Lapsed |