Patent US5728062A successfully refreshed from Google Patents.
US5728062A
Expired / Lapsed
US
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Apparatus and methods for vibratory intraluminal therapy employing magnetostrictive transducers
Assignee: Pharmasonics Inc
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Filing: 1995-11-30
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Granted: 1998-03-17
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Expires: 2015-11-30
Abstract
Abstract An energy-transmitting catheter comprises a catheter body having a vibrating assembly at its distal end. The vibrating assembly comprises a magnetostrictive driver which is mechanically coupled to an interface member on the catheter for radiating energy into an environment surrounding the distal end of the catheter. Usually, the vibrating assembly further includes a tail mass, an interface member, and a spring element which together and in combination with the magnetostrictive driver define a resonant assembly for amplification of the displacement of the interface surface provided by the magnetostrictive driver. The catheter is useful for treating luminal conditions, such as vascular clot and plaque. Optionally, a therapeutic agent may be delivered through the catheter before, after, or simultaneously with the application of vibratory energy.
Inventors
- 👤 Axel F. Brisken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:57
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/22; A61B17/22004; A61B17/22012; A61B17/2202; B; B06; B06B; B06B1/00; B06B1/02; B06B1/08; A61B2017/22021; A61B2017/22038; A61B2017/22082; A61B2017/22084; A61B2217/00; A61B2217/002; A61B2217/007; A61M; A61M3/00; A61M3/02; A61M3/0279
Claims Analysis
Total Claims: 47
Claim 1
Independent Claim
53 words
An energy-transmitting catheter, said catheter comprising: a flexible catheter body having a proximal end and a distal end; a magnetostrictive driver disposed near and within the distal end of the catheter body; and an interface surface mechanically coupled to the driver so that said surface can be oscillated relative to the catheter body.
Claim 2
Dependent Claim
53 words
An energy-transmitting catheter, said catheter comprising: a flexible catheter body having a proximal end and a distal end; a magnetostrictive driver disposed near and within the distal end of the catheter body; and an interface surface mechanically coupled to the driver so that said surface can be oscillated relative to the catheter body.
Claim 3
Dependent Claim
24 words
An energy-transmitting catheter as in claim 1, wherein the magnetostrictive driver comprises a linear element and a coil disposed coaxially about the linear element.
Claim 4
Dependent Claim
35 words
An energy-transmitting driver as in claim 2, wherein the linear element has a geometry and is composed of a material which provide oscillation at a frequency in the range from 10 kHz to 300 kHz.
Claim 5
Dependent Claim
22 words
An energy-transmitting catheter as in claim 2, wherein the linear element is composed of a polycrystalline alloy of terbium, dysprosium, and iron.
Claim 6
Dependent Claim
42 words
An energy-transmitting catheter as in claim 2, wherein the linear element is a tube or a solid rod having a length in the range from 3 mm to 12 mm and a diameter in the range from 0.5 mm to 3 mm.
Claim 7
Dependent Claim
18 words
An energy-transmitting catheter as in claim 1, wherein the magnetostrictive driver is included in a resonant spring-mass assembly.
Claim 8
Dependent Claim
97 words
An energy-transmitting catheter as in claim 6, wherein the resonant spring-mass assembly comprises an interface member having the interface surface thereon; a tail mass at the distal end of the catheter body; and a spring element attached to and extending between the tail mass and the interface member with the magnetostrictive driver therebetween; wherein the tail mass has a mass which is much greater than that of the interface member and wherein the spring element provides a spring force in combination with the elastic modulus of the magnetostrictive driver which permits resonant driving by the magnetostrictive driver.
Claim 9
Dependent Claim
26 words
An energy-transmitting catheter as in claim 7, wherein the tail mass has a mass which is at least four times the mass of the interface member.
Claim 10
Dependent Claim
39 words
An energy-transmitting catheter as in claim 8, wherein the tail mass has a mass in the range from 0.1 gm to 10 gm and the interface member has a mass in the range from 0.01 gm to 1 gm.
Claim 11
Dependent Claim
34 words
An energy-transmitting catheter as in claim 7, wherein the spring element comprises at least one rod secured at a proximal end to the tail mass and at a distal end to the interface member.
Claim 12
Dependent Claim
21 words
An energy-transmitting catheter as in claim 10, wherein the spring element consists of a single rod disposed coaxially within the catheter.
Claim 13
Dependent Claim
27 words
An energy-transmitting catheter as in claim 10, wherein the spring element comprises at least two parallel rod members disposed symmetrically about the axis of the catheter body.
Claim 14
Dependent Claim
42 words
An energy-transmitting catheter as in claim 1, wherein the interface surface includes at least a portion which extends laterally over a distal end of the catheter and which forwardly transmits longitudinal oscillations into the environment surrounding the distal end of the catheter.
Claim 15
Dependent Claim
16 words
An energy-transmitting catheter as in claim 13, wherein the interface surface has a generally convex shape.
Claim 16
Dependent Claim
27 words
An energy-transmitting catheter as in claim 1, wherein the interface surface includes at least a portion which extends axially over a lateral surface of the catheter body.
Claim 17
Dependent Claim
22 words
An energy-transmitting catheter as in claim 1, wherein the catheter body has at least one lumen for delivering a therapeutic agent therethrough.
Claim 18
Dependent Claim
57 words
An improved ultrasonic catheter of the type comprising a flexible catheter body having a peripheral surface and an ultrasonic driver near a distal end thereof, wherein the improvement comprises a magnetostrictive driver mechanically coupled to an interface surface on the catheter body, wherein the magnetostrictive driver is disposed entirely within the peripheral surface of the catheter body.
Claim 19
Dependent Claim
57 words
An improved ultrasonic catheter of the type comprising a flexible catheter body having a peripheral surface and an ultrasonic driver near a distal end thereof, wherein the improvement comprises a magnetostrictive driver mechanically coupled to an interface surface on the catheter body, wherein the magnetostrictive driver is disposed entirely within the peripheral surface of the catheter body.
Claim 20
Dependent Claim
24 words
An improved catheter as in claim 17, wherein the magnetostrictive driver comprises a linear element and a coil disposed coaxially about the linear element.
Claim 21
Dependent Claim
35 words
An improved driver as in claim 18, wherein the linear element has a geometry and is composed of a material which provides oscillation at a frequency in the range from 10 kHz to 300 kHz.
Claim 22
Dependent Claim
22 words
An improved catheter as in claim 18, wherein the linear element is composed of a polycrystalline alloy of terbium, dysprosium, and iron.
Claim 23
Dependent Claim
42 words
An improved catheter as in claim 18, wherein the linear element is a tube or a solid rod having a length in the range from 3 mm to 12 mm and a diameter in the range from 0.5 mm to 3 mm.
Claim 24
Dependent Claim
18 words
An energy-transmitting catheter as in claim 17, wherein the magnetostrictive driver is included in a resonant spring-mass assembly.
Claim 25
Dependent Claim
87 words
An energy-transmitting catheter as in claim 22, wherein the resonant spring-mass assembly comprises an interface member having the interface surface thereon; a tail mass at the proximal end of the catheter body; and a spring element attached to and extending between the tail mass and the interface member with the magnetostrictive driver therebetween; wherein the tail mass has a mass which is much greater than that of the interface surface and wherein the spring element provides a spring force which permits resonant driving by the magnetostrictive driver.
Claim 26
Dependent Claim
26 words
An improved catheter as in claim 23, wherein the tail mass has a mass which is at least four times the mass of the interface member.
Claim 27
Dependent Claim
39 words
An improved catheter as in claim 24, wherein the tail mass has a mass in the range from 0.1 gm to 10 gm and the interface member has a mass in the range from 0.01 gm to 1 gm.
Claim 28
Dependent Claim
34 words
An improved catheter as in claim 23, wherein the spring element comprises at least one rod secured at a proximal end to the tail mass and at a distal end to the interface member.
Claim 29
Dependent Claim
21 words
An improved catheter as in claim 26, wherein the spring element consists of a single rod disposed coaxially within the catheter.
Claim 30
Dependent Claim
27 words
An improved catheter as in claim 26, wherein the spring element comprises at least two parallel rod members disposed symmetrically about the axis of the catheter body.
Claim 31
Dependent Claim
42 words
An energy-transmitting catheter as in claim 17, wherein the interface surface includes at least a portion which extends laterally over a distal end of the catheter and which forwardly transmits longitudinal oscillations into the environment surrounding the distal end of the catheter.
Claim 32
Dependent Claim
16 words
An improved catheter as in claim 29, wherein the interface surface has a generally convex shape.
Claim 33
Dependent Claim
27 words
An improved catheter as in claim 17, wherein the interface member includes at least a portion which extends axially over a lateral surface of the catheter body.
Claim 34
Dependent Claim
22 words
An improved catheter as in claim 17, wherein the catheter body has at least one lumen for delivering a therapeutic agent therethrough.
Claim 35
Independent Claim
87 words
A method for treating an intraluminal target site, said method comprising: providing a flexible catheter having a magnetostrictive driver disposed at and within a distal end of the catheter, wherein the magnetostrictive driver is mechanically coupled to an interface surface near the distal end of the catheter; advancing the distal end of the catheter to an intraluminal region near the target site; and energizing the magnetostrictive driver to oscillate the interface surface and impart vibratory energy into a fluid environment surrounding the distal end of the catheter.
Claim 36
Independent Claim
87 words
A method for treating an intraluminal target site, said method comprising: providing a flexible catheter having a magnetostrictive driver disposed at and within a distal end of the catheter, wherein the magnetostrictive driver is mechanically coupled to an interface surface near the distal end of the catheter; advancing the distal end of the catheter to an intraluminal region near the target site; and energizing the magnetostrictive driver to oscillate the interface surface and impart vibratory energy into a fluid environment surrounding the distal end of the catheter.
Claim 37
Dependent Claim
15 words
A method as in claim 33, wherein the intraluminal target site contains a vascular stenosis.
Claim 38
Dependent Claim
17 words
A method as in claim 34, wherein the interface member surface is engaged against a vascular obstruction.
Claim 39
Dependent Claim
25 words
A method as in claim 33, wherein the interface surface is oscillated at a frequency in the range from about 10 kHz to 300 kHz.
Claim 40
Dependent Claim
25 words
A method as in claim 36, wherein the interface member is driven with a longitudinal amplitude in the range from 0.05 μm to 20 μm.
Claim 41
Dependent Claim
24 words
A method as in claim 33, wherein at least a portion of the interface surface extends laterally over the distal end of the catheter.
Claim 42
Dependent Claim
30 words
A method as in claim 38, wherein the laterally extending portion of the interface surface has an area in the range from 0.5 mm 2 to 20 mm 2 .
Claim 43
Dependent Claim
25 words
A method as in claim 33, wherein at least a portion of the interface surface extends axially over a lateral surface of the catheter body.
Claim 44
Dependent Claim
19 words
A method as in claim 33, further comprising delivering a therapeutic agent through the catheter to the intraluminal lesion.
Claim 45
Dependent Claim
21 words
A method as in claim 41, wherein the therapeutic agent is delivered while ultrasonic energy is being radiated into the region.
Claim 46
Dependent Claim
22 words
A method as in claim 42, wherein the therapeutic agent is a fibrinolytic agent delivered to a vascular stenosis to treat clot.
Claim 47
Dependent Claim
21 words
A method as in claim 42, wherein the therapeutic agent is delivered to a previously treated vascular site to inhibit restenosis.
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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) | 2001-03-16 | 2001-09-15 | 2002-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-03-16 | 2005-09-15 | 2006-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-03-16 | 2009-09-15 | 2010-03-17 | $7700.00 | Window Closed / Lapsed |