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US6059752A
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US
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Mechanical apparatus and method for dilating and irradiating a site of treatment
Assignee: RadioVascular Systems LLC
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Filing: 1997-11-13
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Granted: 2000-05-09
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Expires: 2017-11-13
Abstract
Abstract A mechanical dilatation and irradiation device for enlarging a flow passage of a vessel by dilating and irradiating an obstruction in the vessel. The present invention comprises a substantially cylindrically shaped expansion member and includes a means engaged to the expansion member for altering the distance between the proximal end and the distal end of the expansion member thereby transforming the expansion member between a diametrically contracted configuration to diametrically expanded configuration. A radioisotope is place either inside the expansion member, alloyed into the metal from which the expansion member is constructed, coated onto the expansion member's exterior surface or alternately, the non-radioactive metal or alloy of the expansion member can be irradiated so that it has become radioactive, i.e. it is then a radioisotope. The present method comprises the steps of advancing the radioactive expansion member or radioactive catheter to the obstruction in a vessel and applying opposed forces on said expansion member in an axial direction to move the expansion member to an expanded configuration wherein the expansion member dilates the obstruction and the catheter/expansion member assembly irradiates the obstruction.
Inventors
- 👤 Jerome Segal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:47
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/95; A61F2/958; A61M; A61M25/00; A61M25/10; A61M29/00; A61M29/02; A61F2/0077; A61F2/82; A61F2/86; A61F2/90; A61F2/91; A61F2/02; A61F2/30; A61F2002/30001; A61F2002/30003; A61F2002/3006; A61F2002/3008; A61F2002/30316; A61F2002/30329; A61F2002/30448; A61F2002/828; A61F2220/00; A61F2220/0025; A61F2220/005; A61F2250/00; A61F2250/0058; A61F2250/0096; A61F2250/0098; A61M2025/1043; A61M2025/1068; A61M2025/1097
Claims Analysis
Total Claims: 45
Claim 1
Independent Claim
157 words
A catheter for dilating and irradiating an obstruction within a vascular segment or a body passageway which comprises: said catheter having a distal end and a proximal end; a substantially cylindrical shaped expansion member located on said distal end, said expansion member having a first end and a second end, said first end being a distance from said second end; an altering means engagable to said first end and said second end of said expansion member for altering said distance there between to move said expansion member between a first configuration wherein said expansion member is characterized by a first diameter and a second configuration wherein said expansion member is characterized by a second diameter, said second diameter being greater than said first diameter, wherein said expansion member is adapted to allow blood to flow through said expansion member while said expansion member is in said second configuration; and a radioactive source located at said distal end.
Claim 2
Dependent Claim
157 words
A catheter for dilating and irradiating an obstruction within a vascular segment or a body passageway which comprises: said catheter having a distal end and a proximal end; a substantially cylindrical shaped expansion member located on said distal end, said expansion member having a first end and a second end, said first end being a distance from said second end; an altering means engagable to said first end and said second end of said expansion member for altering said distance there between to move said expansion member between a first configuration wherein said expansion member is characterized by a first diameter and a second configuration wherein said expansion member is characterized by a second diameter, said second diameter being greater than said first diameter, wherein said expansion member is adapted to allow blood to flow through said expansion member while said expansion member is in said second configuration; and a radioactive source located at said distal end.
Claim 3
Dependent Claim
47 words
The catheter as recited in claim 1 wherein said expansion member comprises a first plurality of flexible elongate elements helically wound in a first direction of rotation and a second plurality of flexible elongate elements helically wound in a second direction of rotation to form a braid.
Claim 4
Dependent Claim
34 words
The catheter as recited in claim 2 wherein each flexible elongate element has a circular cross section defined by a diameter and said diameter is in a range of approximately 0.001 to 0.010 inches.
Claim 5
Dependent Claim
20 words
The catheter as recited in claim 1 further comprising said radioactive source employing material that emits radiation from a radioisotope.
Claim 6
Dependent Claim
21 words
The catheter as recited in claim 4 further comprising said radioisotope is located within a structural material of said expansion member.
Claim 7
Dependent Claim
21 words
The catheter as recited in claim 4 further comprising said radioisotope being incorporated into the structural material of said expansion member.
Claim 8
Dependent Claim
20 words
The catheter as recited in claim 4 further comprising said radioisotope is fixed to a surface of said expansion member.
Claim 9
Dependent Claim
33 words
The catheter as recited in claim 4 further comprising said radioisotope is alloyed into a structural material of at least one band surrounding an inner tubular member on distal end of said catheter.
Claim 10
Dependent Claim
24 words
The catheter as recited in claim 4 further comprising said radioisotope is alloyed into the material comprising an inner tubular member of said catheter.
Claim 11
Dependent Claim
30 words
The catheter as recited in claim 4 further comprising said radioisotope is alloyed into a structural material used to fabricate at least one flexible elongate element of the expansion member.
Claim 12
Dependent Claim
34 words
The catheter as recited in claim 4 further comprising said radioisotope is either a solid, liquid or gaseous material contained within a lumen of at least one flexible elongate element of the expansion member.
Claim 13
Dependent Claim
35 words
The catheter as recited in claim 4 further comprising said radioisotope is a coating affixed to at least a portion of the outer surface of at least one flexible elongate element of the expansion member.
Claim 14
Dependent Claim
23 words
The catheter as recited in claim 1 further comprising said radioactive source consists of a non-radioactive material that is activated to become radioactive.
Claim 15
Dependent Claim
18 words
The catheter as recited in claim 1 further comprising said radioactive source is a beta particle emitting radioisotope.
Claim 16
Dependent Claim
17 words
The catheter as recited in claim 1 further comprising said radioactive source is a gamma emitting radioisotope.
Claim 17
Dependent Claim
17 words
The catheter as recited in claim 1 further comprising said radioactive source is an alpha emitting radioisotope.
Claim 18
Dependent Claim
23 words
The catheter as recited in claim 1 further comprising said radioactive source as having any combination of alpha, beta or gamma emitting radioisotope.
Claim 19
Dependent Claim
20 words
The catheter as recited in claim 1 further comprising said radioactive source having a half-life of less than 100 days.
Claim 20
Dependent Claim
26 words
The catheter as recited in claim 1 further comprising said radioactive source being substantially centered within a vessel segment to uniformly expose said segment with radiation.
Claim 21
Dependent Claim
117 words
A mechanical dilatation and irradiation catheter comprising: said catheter having a distal end and a proximal end, said catheter having an inner member and an outer member; an expandable mesh positioned on said distal end adapted to dilate an obstruction in a vessel, said mesh having a first contracted diameter and a second expanded diameter, said second expanded diameter being larger than said first contracted diameter; said mechanical dilatation and irradiation catheter being adapted to dilate said obstruction and expose said obstruction to radiation; said expandable mesh adapted to allow blood perfusion while said mesh is in said second expanded diameter; and said mechanical dilatation and irradiation catheter having a radioactive source located at said distal end.
Claim 22
Dependent Claim
117 words
A mechanical dilatation and irradiation catheter comprising: said catheter having a distal end and a proximal end, said catheter having an inner member and an outer member; an expandable mesh positioned on said distal end adapted to dilate an obstruction in a vessel, said mesh having a first contracted diameter and a second expanded diameter, said second expanded diameter being larger than said first contracted diameter; said mechanical dilatation and irradiation catheter being adapted to dilate said obstruction and expose said obstruction to radiation; said expandable mesh adapted to allow blood perfusion while said mesh is in said second expanded diameter; and said mechanical dilatation and irradiation catheter having a radioactive source located at said distal end.
Claim 23
Dependent Claim
20 words
The catheter as recited in claim 20 further comprising said radioactive source employing material that emits radiation from a radioisotope.
Claim 24
Dependent Claim
21 words
The catheter as recited in claim 21 further comprising said radioisotope is located with the structural material of said expandable mesh.
Claim 25
Dependent Claim
20 words
The catheter as recited in claim 21 further comprising said radioisotope is fixed to a surface of said expandable mesh.
Claim 26
Dependent Claim
28 words
The catheter as recited in claim 21 further comprising said radioisotope is alloyed into the material of at least one band surrounding said inner member of said catheter.
Claim 27
Dependent Claim
23 words
The catheter as recited in claim 21 further comprising said radioisotope is alloyed into the material comprising said inner member of said catheter.
Claim 28
Dependent Claim
29 words
The catheter as recited in claim 21 further comprising said radioisotope is alloyed into the material used to fabricate at least one flexible elongate element of the expansion member.
Claim 29
Dependent Claim
34 words
The catheter as recited in claim 21 further comprising said radioisotope is either a solid, liquid or gaseous material contained within a lumen in at least one flexible elongate element of the expansion member.
Claim 30
Dependent Claim
35 words
The catheter as recited in claim 21 further comprising said radioisotope is a coating affixed to at least a portion of the outer surface of at least one flexible elongate element of the expansion member.
Claim 31
Dependent Claim
23 words
The catheter as recited in claim 20 further comprising said radioactive source consists of a non-radioactive material that is activated to become radioactive.
Claim 32
Dependent Claim
18 words
The catheter as recited in claim 20 further comprising said radioactive source is a beta particle emitting radioisotope.
Claim 33
Dependent Claim
17 words
The catheter as recited in claim 20 further comprising said radioactive source is a gamma emitting radioisotope.
Claim 34
Dependent Claim
17 words
The catheter as recited in claim 20 further comprising said radioactive source is an alpha emitting radioisotope.
Claim 35
Dependent Claim
22 words
The catheter as recited in claim 20 further comprising said radioactive source as having any combination of alpha, beta, gamma emitting radioisotope.
Claim 36
Dependent Claim
20 words
The catheter as recited in claim 20 further comprising said radioactive source having a half-life of less than 100 days.
Claim 37
Dependent Claim
26 words
The catheter as recited in claim 20 further comprising said radioactive source being substantially centered within a vessel segment to uniformly expose said segment to radiation.
Claim 38
Independent Claim
169 words
A method for dilating and irradiating an obstruction in a body passageway which comprises the steps of: exposing an expansion member of a catheter to a radiation activation mechanism such that some portion or all of said expansion member becomes radioactive; placing said radioactive expansion member within a vessel or body passageway, said expansion member being moveable between a first contracted configuration wherein said member is defined by a first dimension extending in a radial direction of said catheter, and a second expanded configuration wherein said member is defined by a second dimension extending in said radial direction; advancing said radioactive expansion member to a predetermined site in the vessel or body passageway in said contracted configuration; applying a force on said radioactive expansion member in an axial direction of said catheter to move said expansion member between said first contracted configuration to said second expanded configuration wherein said expansion member dilates and irradiates an obstruction within said predetermined site while allowing blood to flow through said expansion member.
Claim 39
Independent Claim
169 words
A method for dilating and irradiating an obstruction in a body passageway which comprises the steps of: exposing an expansion member of a catheter to a radiation activation mechanism such that some portion or all of said expansion member becomes radioactive; placing said radioactive expansion member within a vessel or body passageway, said expansion member being moveable between a first contracted configuration wherein said member is defined by a first dimension extending in a radial direction of said catheter, and a second expanded configuration wherein said member is defined by a second dimension extending in said radial direction; advancing said radioactive expansion member to a predetermined site in the vessel or body passageway in said contracted configuration; applying a force on said radioactive expansion member in an axial direction of said catheter to move said expansion member between said first contracted configuration to said second expanded configuration wherein said expansion member dilates and irradiates an obstruction within said predetermined site while allowing blood to flow through said expansion member.
Claim 40
Dependent Claim
35 words
A method as recited in claim 36 which further comprises the step of positioning a guidewire in the body passageway, and wherein said advancing step is accomplished by threading said expansion member over said guidewire.
Claim 41
Dependent Claim
37 words
A method as recited in claim 36 which further comprises the step of allowing said expansion member to be in said second expanded configuration for a predetermined period of time to further expose said obstruction to radiation.
Claim 42
Independent Claim
163 words
A method for dilating and irradiating an obstruction in a vessel or body passageway which comprises the steps of: placing a catheter within a vessel or body passageway, said catheter having an expansion member being moveable between a first contracted configuration wherein said member is defined by a first dimension extending in a radial direction, and a second expanded configuration wherein said member is defined by a second dimension extending in said radial direction, said catheter also containing a radioactive source located at a distal end of said catheter; advancing said catheter with radioactive source to a predetermined site in the vessel or body passageway in said contracted configuration; applying a force on said expansion member in an axial direction of said catheter to move said expansion member between said first contracted configuration to said second expanded configuration wherein said obstruction is dilated and irradiated; and allowing blood to flow through said expansion member while said expansion member is in said expanded configuration.
Claim 43
Independent Claim
163 words
A method for dilating and irradiating an obstruction in a vessel or body passageway which comprises the steps of: placing a catheter within a vessel or body passageway, said catheter having an expansion member being moveable between a first contracted configuration wherein said member is defined by a first dimension extending in a radial direction, and a second expanded configuration wherein said member is defined by a second dimension extending in said radial direction, said catheter also containing a radioactive source located at a distal end of said catheter; advancing said catheter with radioactive source to a predetermined site in the vessel or body passageway in said contracted configuration; applying a force on said expansion member in an axial direction of said catheter to move said expansion member between said first contracted configuration to said second expanded configuration wherein said obstruction is dilated and irradiated; and allowing blood to flow through said expansion member while said expansion member is in said expanded configuration.
Claim 44
Dependent Claim
34 words
A method as recited in claim 39 which further comprises the step of positioning a guidewire in the body passageway, and wherein said advancing step is accomplished by threading said catheter over said guidewire.
Claim 45
Dependent Claim
37 words
A method as recited in claim 39 which further comprises the step of allowing said expansion member to be in said second expanded configuration for a predetermined period of time to further expose said obstruction to radiation.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-05-09 | 2003-11-08 | 2004-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-05-09 | 2007-11-08 | 2008-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-05-09 | 2011-11-08 | 2012-05-09 | $7700.00 | Window Closed / Lapsed |