Patent EP0554616A2 successfully refreshed from Google Patents.
EP0554616A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Apparatus for intravascular cavitation or delivery of low frequency mechanical energy
Assignee: Boston Scientific Scimed Inc
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Filing: 1992-11-23
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Granted: —
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Expires: 2012-11-23
Abstract
Abstract An apparatus and method for recanalization of a blood vessel obstruction by application of low frequency mechanical energy to a vessel site or by creation of cavitation at the vessel site includes a catheter assembly having a wire located within and extending through a wire support tube and adapted to move axially therewith. A driving apparatus positioned at a proximal portion of the catheter assembly imparts energy to the wire to oscillate it axially. A tip is connected to a distal end of the wire and imparts low frequency mechanical energy or causes cavitation at the vessel site to recanalize it. Further, a fluid particle removal system can be incorporated within the catheter assembly to convey pressurized fluid via the wire support tube to the tip where the fluid is redirected in a proximal direction into a second tube of the catheter assembly coaxially positioned around the wire support tube. Particulate from the vessel obstruction being recanalized becomes attached viscously in the redirected pressurized fluid and is withdrawn from the vessel site.
Inventors
- 👤 Mark J. Whalen
- 👤 Lloyd Willard
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 19:57
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/32; A61B17/3205; A61B17/3207; A61B17/320783; A61B17/22; A61B17/22004; A61B17/22012; A61B2017/22038; A61B2017/22051; A61B2017/22052; A61B2017/22072; A61B2017/22074; A61B2017/22075; A61B17/320068; A61B2017/320088; A61B90/00; A61B90/36; A61B90/37; A61B2090/378; A61B2090/3782; A61B2090/3784; A61B2217/00; A61B2217/002; A61B2217/005; A61B2217/007
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
186 words
An apparatus for recanalization of an obstruction in a blood vessel characterized by the presence of undesired material at a site in the blood vessel comprising: a wire support tube adapted to be positioned intravascularly in the patient, said wire support tube having a proximal portion locatable outside the patient's vessel and a distal portion adapted to be positioned in the patient's blood vessel at the site of the obstruction; a wire located within and extending through said wire support tube, said wire adapted to move axially with respect to said wire support tube; a tip connected to a distal end of said wire and extending distally from the distal portion of the wire support tube; a driving apparatus positioned at said proximal portion of the wire support tube and adapted to impart energy to said wire located therein to move said wire in oscillation axially with respect to said support tube; a second tube located around at least a distal portion of the wire support tube, said second tube adapted to damp transverse movement of the wire support tube or wire caused by wire oscillations.
Claim 2
Dependent Claim
36 words
An apparatus as claimed in claim 1 in which said second tube is adapted to provide an annular region between an inner surface of the second tube and an outer surface of the wire support tube.
Claim 3
Dependent Claim
38 words
An apparatus as claimed in claim 1 in which said second tube fits closely over the wire support tube and further in which the second tube includes a plurality of splines extending longitudinally on an outside surface thereof.
Claim 4
Independent Claim
117 words
An apparatus as claimed in any one of the preceding claims further comprising: a pressurized fluid supply connected to said proximal wire support tube and adapted to convey pressurized fluid distally in said support tube along said wire to a distal opening of said wire support tube directed at a channel in said tip adapted to redirect the pressurized fluid from said wire support tube distal opening toward a distal opening of said second tube formed by the annular region between said wire support tube and said second tube; and an exhaust port connected to a proximal portion of said second tube and adapted to withdraw effluent from the second tube conveyed from the distal opening thereof.
Claim 5
Independent Claim
51 words
An apparatus as claimed in any one of the preceding claims further comprising: a distal sheath guide located between the wire support tube and the second tube corresponding to a distal location thereof, said distal sheath guide adapted to maintain the second tube concentrically coaxially disposed about the wire support tube.
Claim 6
Independent Claim
24 words
An apparatus as claimed in any one of the preceding claims comprising: an inflatable balloon connected to the distal portion of the second tube.
Claim 7
Independent Claim
69 words
An apparatus as claimed in any one of the preceding claims further comprising: a mass connected to the proximal end of the wire and adapted to be moved by application of a magnetic field from the driving apparatus; and a spring connected between the mass and the supply tube adapted to store energy from said mass and restore the mass position to oscillate the wire connected to the mass.
Claim 8
Dependent Claim
53 words
An apparatus as claimed in claim 7 in which the driving apparatus further comprises: a solenoid assembly positioned around the proximal end of the wire support tube and adapted to apply a magnetic field to the mass; and a control circuit connected to the solenoid assembly and adapted to drive the solenoid assembly.
Claim 9
Independent Claim
61 words
An apparatus as claimed in any one of the preceding claims further comprising: a rheological material occupying an annular region between the wire support tube and the second tube; and a switchable electrical potential source connected across the wire support tube and the second tube and adapted to cause the rheological fluid to change from a first phase to another phase.
Claim 10
Independent Claim
69 words
An apparatus as claimed in any one of the preceding claims in which said tip further includes at least one port extending through a wall thereof from an inside chamber of said tip to the vessel environment outside said tip whereby a drug therapy provided through the wire support tube is conveyed via the inside chamber of the tip through the at least one port to the vessel environment.
Claim 11
Independent Claim
194 words
An apparatus for recanalization of an obstruction in a blood vessel characterized by the presence of undesired material at a site in the blood vessel comprising: a wire support tube adapted to be positioned intravascularly in the patient, said wire support tube having a proximal portion locatable outside the patient's vessel and a distal portion adapted to be positioned in the patient's blood vessel at the site of the obstruction; a wire located within and extending through said wire support tube, said wire adapted to move axially with respect to said wire support tube; a tip connected to a distal end of said wire and extending distally from the distal portion of the wire support tube; a driving apparatus positioned at a proximal portion of said wire support tube and adapted to generate a magnetic field to impart energy to said wire located in said wire support tube; and a mechanical energy storage member connected to the proximal end of said wire and adapted to store the energy received from said driving apparatus and to release said energy to said wire to move said wire in oscillation axially with respect to said support tube.
Claim 12
Dependent Claim
69 words
An apparatus as claimed in claim 11 in which said energy storage member further comprises: a mass connected to the proximal end of said wire and adapted to be moved by application of the magnetic field from said driving apparatus; and a spring connected between said mass and said supply tube adapted to store energy from said mass and restore the position of said mass to oscillate said wire.
Claim 13
Dependent Claim
46 words
An apparatus as claimed in claim 11 or claim 12 further comprising: a second tube located around at least a distal portion of said wire support tube, said second tube adapted to damp transverse movement of the wire support tube or wire caused by wire oscillations.
Claim 14
Dependent Claim
36 words
An apparatus as claimed in claim 13 in which said second tube is adapted to provide an annular region between an inner surface of said second tube and an outer surface of said wire support tube.
Claim 15
Dependent Claim
38 words
An apparatus as claimed in claim 14 in which said second tube fits closely over the wire support tube and further in which the second tube includes a plurality of splines extending longitudinally on an outside surface thereof.
Claim 16
Dependent Claim
113 words
An apparatus as claimed in claim 15 further comprising: a pressurized fluid supply connected to said proximal wire support tube and adapted to convey pressurized fluid distally in said support tube along said wire to a distal opening of said wire support tube directed at a channel in said tip adapted to redirect the pressurized fluid from said wire support tube distal opening toward a distal opening of said second tube formed by the annular region between said wire support tube and said second tube; and an exhaust port connected to a proximal portion of said second tube and adapted to withdraw effluent from the second tube conveyed from the distal opening thereof.
Claim 17
Dependent Claim
47 words
An apparatus as claimed in claim 16 further comprising: a distal sheath guide located between the wire support tube and the second tube corresponding to a distal location thereof; said distal sheath guide adapted to maintain the second tube concentrically coaxially disposed about the wire support tube.
Claim 18
Independent Claim
26 words
An apparatus as claimed in any one of claims 13 to 17 further comprising: an inflatable balloon connected to the distal portion of the second tube.
Claim 19
Independent Claim
62 words
An apparatus as claimed in any one of claims 13 to 18 further comprising: a rheological material occupying an annular region between the wire support tube and the second tube; and a switchable electrical potential source connected across the wire support tube and the second tube and adapted to cause the rheological fluid to change from a first phase to another phase.
Claim 20
Dependent Claim
53 words
An apparatus as claimed in claim 21 in which the driving apparatus further comprises: a solenoid assembly positioned around the proximal end of the wire support tube and adapted to apply a magnetic field to the mass; and a control circuit connected to the solenoid assembly and adapted to drive the solenoid assembly.
References Cited (Backward Citations)
No citation records indexed.
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