US5792157A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expandable intravascular occlusion material removal devices and methods of use
Assignee: Boston Scientific Scimed Inc
•
Filing: 1996-09-30
•
Granted: 1998-08-11
•
Expires: 2016-09-30
Abstract
Abstract A novel intravascular occlusion material removal device for removing vascular occlusion material in a vascular lumen comprises a prime mover and an expandable material removal element insertable intravascularly into the vascular lumen. A hollow drive shaft operatively connects the prime mover to the expandable material removal element for rotating the expandable material removal element intravascularly. A guidewire is insertable through the distal end of the expandable material removal element and the hollow drive shaft, and is shiftable within the drive shaft and the expandable material removal element. The expandable material removal element is expandable responsive to shifting of the guidewire. A material removal element movement control mechanism is operatively connected to the guidewire for positively incrementally shifting the guidewire, and a guidewire lock mechanism is operatively connected between the guidewire and the material removal element movement control mechanism for fixing the guidewire with respect to the material removal element movement control mechanism. A number of novel methods for removing vascular occlusion material are also provided. One such method comprises the steps of: providing a vascular occlusion material removal device having an expandable occlusion material removal element, the material removal element comprising a braid having a hollow interior; providing a guidewire; intravascularly navigating the guidewire to the occlusion material; inserting the guidewire into the hollow interior; intravascularly navigating the braid to the occlusion material over the guidewire; shifting the guidewire with respect to the braid to expand the braid; expanding the braid such that the braid bites into occlusion material thereby allowing occlusion material to pass into the hollow interior; and shifting the guidewire with respect to the braid to contract the braid and to capture occlusion material within the hollow interior. The expanded braid can also be rotated intravascularly to remove occlusion material.
Inventors
- 👤 Hans A. Mische
- 👤 Thomas V. Ressemann
- 👤 Scott A. Hoium
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:44
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/32; A61B17/3205; A61B17/3207; A61B17/320725; A61B17/22; A61B2017/22038; A61B2017/22042; A61B2017/22072; A61B2017/22074; A61B2017/22075; A61B2017/320004; A61B2017/320012; A61B90/00; A61B90/39
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
158 words
A method for removing vascular occlusion material from a vascular lumen comprising the steps of: providing a vascular occlusion material removal device having an expandable occlusion material removal element, the material removal element comprising a braid having a hollow interior; providing a guide wire with a bearing surface located distally thereon which operatively engages an end of the material removal element to cause longitudinal contraction thereof when the guide wire is longitudinally shifted with respect to the material removal element; intravascularly navigating the guide wire to the occlusion material; intravascularly navigating the braid to the occlusion material over the guide wire; shifting the guide wire with respect to the braid to expand the braid; expanding the braid such that the braid bites into occlusion material, thereby allowing occlusion material to pass into the hollow interior; and shifting the guide wire with respect to the braid to contract the braid and to capture occlusion material within the hollow interior.
Claim 2
Independent Claim
158 words
A method for removing vascular occlusion material from a vascular lumen comprising the steps of: providing a vascular occlusion material removal device having an expandable occlusion material removal element, the material removal element comprising a braid having a hollow interior; providing a guide wire with a bearing surface located distally thereon which operatively engages an end of the material removal element to cause longitudinal contraction thereof when the guide wire is longitudinally shifted with respect to the material removal element; intravascularly navigating the guide wire to the occlusion material; intravascularly navigating the braid to the occlusion material over the guide wire; shifting the guide wire with respect to the braid to expand the braid; expanding the braid such that the braid bites into occlusion material, thereby allowing occlusion material to pass into the hollow interior; and shifting the guide wire with respect to the braid to contract the braid and to capture occlusion material within the hollow interior.
Claim 3
Dependent Claim
35 words
A method for removing vascular occlusion material as defined in claim 1, further comprising the step of: withdrawing the braid from the patient to remove occlusion material captured in the hollow interior from the patient.
Claim 4
Dependent Claim
26 words
A method for removing vascular occlusion material as defined in claim 1, further comprising the step of: rotating the braid intravascularly to remove vascular occlusion material.
Claim 5
Dependent Claim
44 words
A method for removing vascular occlusion material as defined in claim 1, further comprising the steps of: providing a means on the removal device for positively limiting expansion of the braid; and positively limiting expansion of the braid intravascularly by use of the means.
Claim 6
Dependent Claim
73 words
A method for removing vascular occlusion material as defined in claim 1, further comprising the steps of: providing a catheter sheath having a distal end on the removal device insertable intravascularly into the patient, such that the distal end of the catheter sheath is located proximally of the braid; applying a negative pressure to the catheter sheath; and aspirating removed vascular occlusion material through the catheter sheath by means of the negative pressure.
Claim 7
Dependent Claim
35 words
A method for removing vascular occlusion material as defined in claim 5, further comprising the steps of: applying a fluid to the catheter sheath; and infusing the fluid into the patient through the catheter sheath.
Claim 8
Independent Claim
142 words
A method for removing vascular occlusion material from a vascular lumen comprising the steps of: providing a vascular occlusion material removal device having an expandable and flexible occlusion material removal element; providing a guide wire with a bearing surface located distally thereon which operatively engages an end of the material removal element to cause longitudinal contraction thereof when the guide wire is longitudinally shifted with respect to the material removal element; intravascularly navigating the guide wire to the occlusion material; inserting the guide wire into the removal element; intravascularly navigating the removal element to the occlusion material over the guide wire; shifting the guide wire with respect to the removal element to expand the removal element intravascularly; energizing the removal element intravascularly to remove vascular occlusion material; applying a fluid to the removal device; and irrigating the vascular lumen with the fluid.
Claim 9
Independent Claim
142 words
A method for removing vascular occlusion material from a vascular lumen comprising the steps of: providing a vascular occlusion material removal device having an expandable and flexible occlusion material removal element; providing a guide wire with a bearing surface located distally thereon which operatively engages an end of the material removal element to cause longitudinal contraction thereof when the guide wire is longitudinally shifted with respect to the material removal element; intravascularly navigating the guide wire to the occlusion material; inserting the guide wire into the removal element; intravascularly navigating the removal element to the occlusion material over the guide wire; shifting the guide wire with respect to the removal element to expand the removal element intravascularly; energizing the removal element intravascularly to remove vascular occlusion material; applying a fluid to the removal device; and irrigating the vascular lumen with the fluid.
Claim 10
Dependent Claim
52 words
A method according to claim 7, wherein the material removal device includes a hollow drive shaft insertable intravascularly and operatively connected to the removal element for energizing the removal element, and further comprising the steps of: applying a fluid to the hollow drive shaft; and irrigating the vascular lumen with the fluid.
Claim 11
Dependent Claim
203 words
A vascular occlusion material removal device for removing vascular occlusion material in a vascular lumen, the removal device comprising: a prime mover; an expandable material removal element insertable intravascularly into the vascular lumen, the expandable material removal element comprising a plurality of braided wires; a hollow drive shaft operatively connecting the prime mover to the expandable material element for rotating the expandable material removal element intravascularly; a guide wire insertable through the expandable material removal element and the hollow drive shaft; the guide wire having a bearing surface located distally thereon which operatively engages an end of the material removal element to cause longitudinal contraction thereof when the guide wire is longitudinally shifted with respect to the material removal element; the guide wire being shiftable within the drive shaft and the expandable material removal element; the expandable material removal element being expandable responsive to shifting of the guide wire; a material removal element movement control mechanism operatively connected to the guide wire for positively shifting the guide wire; and a guide wire lock mechanism operatively connected between the guide wire and the material removal element movement control mechanism for fixing the guide wire with respect to the material removal element movement control mechanism.
Claim 12
Dependent Claim
203 words
A vascular occlusion material removal device for removing vascular occlusion material in a vascular lumen, the removal device comprising: a prime mover; an expandable material removal element insertable intravascularly into the vascular lumen, the expandable material removal element comprising a plurality of braided wires; a hollow drive shaft operatively connecting the prime mover to the expandable material element for rotating the expandable material removal element intravascularly; a guide wire insertable through the expandable material removal element and the hollow drive shaft; the guide wire having a bearing surface located distally thereon which operatively engages an end of the material removal element to cause longitudinal contraction thereof when the guide wire is longitudinally shifted with respect to the material removal element; the guide wire being shiftable within the drive shaft and the expandable material removal element; the expandable material removal element being expandable responsive to shifting of the guide wire; a material removal element movement control mechanism operatively connected to the guide wire for positively shifting the guide wire; and a guide wire lock mechanism operatively connected between the guide wire and the material removal element movement control mechanism for fixing the guide wire with respect to the material removal element movement control mechanism.
Claim 13
Dependent Claim
22 words
A vascular occlusion material removal device as defined in claim 9, further comprising at least one of 8 and 16 braided wires.
Claim 14
Dependent Claim
20 words
A vascular occlusion material removal device as defined in claim 9, wherein the wires are made of a super-elastic alloy.
Claim 15
Dependent Claim
19 words
A vascular occlusion material removal device as defined in claim 9, further comprising an abrasive disposed on the wires.
Claim 16
Dependent Claim
22 words
A vascular occlusion material removal device as defined in claim 12, wherein the abrasive comprises a diamond grit electroplated onto the wires.
Claim 17
Dependent Claim
227 words
A vascular occlusion material removal device for removing vascular occlusion material in a vascular lumen, the removal device comprising: a prime mover; an expandable material removal element insertable intravascularly into the vascular lumen; a hollow drive shaft operatively connecting the prime mover to the expandable material removal element for rotating the expandable material removal element intravascularly, the drive shaft comprising a cylindrical portion having a hollow interior and a coiled portion; an aperture in the cylindrical portion for allowing fluid to flow into the hollow interior of the cylindrical portion; a guide wire insertable through the expandable material removal element in the hollow drive shaft; the guide wire having a bearing surface located distally thereon which operatively engages an end of the material removal element to cause longitudinal contraction thereof when the guide wire is longitudinally shifted with respect to the material removal element; the guide wire being shiftable within the drive shaft and the expandable material removal element; the expandable material removal element being expandable responsive to shifting of the guide wire; a material removal element movement control mechanism operatively connected to the guide wire for positively shifting the guide wire; and a guide wire lock mechanism operatively connected between the guide wire and the material removal element movement control mechanism for fixing the guide wire with respect to the material removal element movement control mechanism.
Claim 18
Dependent Claim
227 words
A vascular occlusion material removal device for removing vascular occlusion material in a vascular lumen, the removal device comprising: a prime mover; an expandable material removal element insertable intravascularly into the vascular lumen; a hollow drive shaft operatively connecting the prime mover to the expandable material removal element for rotating the expandable material removal element intravascularly, the drive shaft comprising a cylindrical portion having a hollow interior and a coiled portion; an aperture in the cylindrical portion for allowing fluid to flow into the hollow interior of the cylindrical portion; a guide wire insertable through the expandable material removal element in the hollow drive shaft; the guide wire having a bearing surface located distally thereon which operatively engages an end of the material removal element to cause longitudinal contraction thereof when the guide wire is longitudinally shifted with respect to the material removal element; the guide wire being shiftable within the drive shaft and the expandable material removal element; the expandable material removal element being expandable responsive to shifting of the guide wire; a material removal element movement control mechanism operatively connected to the guide wire for positively shifting the guide wire; and a guide wire lock mechanism operatively connected between the guide wire and the material removal element movement control mechanism for fixing the guide wire with respect to the material removal element movement control mechanism.
Claim 19
Dependent Claim
46 words
A vascular occlusion material removal device as defined in claim 14, wherein the cylindrical portion has a proximal end; further comprising a fluid seal located at the proximal end of the cylindrical portion for limiting fluid flow proximally of the proximal end of the cylindrical portion.
Claim 20
Dependent Claim
200 words
A vascular occlusion material removal device for removing vascular occlusion material in a vascular lumen, the removal device comprising: a prime mover; an expandable material removal element insertable intravascularly into the vascular lumen; a hollow drive shaft operatively connecting the prime mover to the expandable material removal element for rotating the expandable material removal element intravascularly, the hollow drive shaft comprising a coil; a guide wire insertable through the expandable material removal element and the hollow drive shaft; the guide wire having a bearing surface located distally thereon which operatively engages an end of the material removal element to cause longitudinal contraction thereof when the guide wire is longitudinally shifted with respect to the material removal element; the guide wire being shiftable within the drive shaft and the expandable material removal element; the expandable material removal element being expandable responsive to shifting of the guide wire; a material removal element movement control mechanism operatively connected to the guide wire for positively shifting the guide wire; and a guide wire lock mechanism operatively connected between the guide wire and the material removal element movement control mechanism for fixing the guide wire with respect to the material removal element movement control mechanism.
Claim 21
Dependent Claim
200 words
A vascular occlusion material removal device for removing vascular occlusion material in a vascular lumen, the removal device comprising: a prime mover; an expandable material removal element insertable intravascularly into the vascular lumen; a hollow drive shaft operatively connecting the prime mover to the expandable material removal element for rotating the expandable material removal element intravascularly, the hollow drive shaft comprising a coil; a guide wire insertable through the expandable material removal element and the hollow drive shaft; the guide wire having a bearing surface located distally thereon which operatively engages an end of the material removal element to cause longitudinal contraction thereof when the guide wire is longitudinally shifted with respect to the material removal element; the guide wire being shiftable within the drive shaft and the expandable material removal element; the expandable material removal element being expandable responsive to shifting of the guide wire; a material removal element movement control mechanism operatively connected to the guide wire for positively shifting the guide wire; and a guide wire lock mechanism operatively connected between the guide wire and the material removal element movement control mechanism for fixing the guide wire with respect to the material removal element movement control mechanism.
Claim 22
Dependent Claim
23 words
A vascular occlusion material removal device as defined in claim 16, wherein the drive shaft further comprises a lubricous sheath overlying the coil.
Claim 23
Dependent Claim
224 words
A vascular occlusion material removal device for removing vascular occlusion material in a vascular lumen, the removal device comprising: a prime mover; an expandable material removal element insertable intravascularly into the vascular lumen; a hollow drive shaft operatively connecting the prime mover to the expandable material removal element for rotating the expandable material removal element intravascularly; a guide wire insertable through the expandable material removal element in the hollow drive shaft; the guide wire having a bearing surface located distally thereon which operatively engages an end of the material removal element to cause longitudinal contraction thereof when the guide wire is longitudinally shifted with respect to the material removal element; the guide wire being shiftable within the drive shaft and the expandable material removal element; the expandable material removal element being expandable responsive to shifting of the guide wire; a material removal element movement control mechanism operatively connected to the guide wire for positively shifting the guide wire; a guide wire lock mechanism operatively connected between the guide wire and the material removal element movement control mechanism for fixing the guide wire with respect to the material removal element movement control mechanism; and a dilating member on the device for performing at least one of centering the device intravascularly, stabilizing the device intravascularly, occluding flow through a vascular lumen, and angioplastically displacing occlusion material.
Claim 24
Dependent Claim
224 words
A vascular occlusion material removal device for removing vascular occlusion material in a vascular lumen, the removal device comprising: a prime mover; an expandable material removal element insertable intravascularly into the vascular lumen; a hollow drive shaft operatively connecting the prime mover to the expandable material removal element for rotating the expandable material removal element intravascularly; a guide wire insertable through the expandable material removal element in the hollow drive shaft; the guide wire having a bearing surface located distally thereon which operatively engages an end of the material removal element to cause longitudinal contraction thereof when the guide wire is longitudinally shifted with respect to the material removal element; the guide wire being shiftable within the drive shaft and the expandable material removal element; the expandable material removal element being expandable responsive to shifting of the guide wire; a material removal element movement control mechanism operatively connected to the guide wire for positively shifting the guide wire; a guide wire lock mechanism operatively connected between the guide wire and the material removal element movement control mechanism for fixing the guide wire with respect to the material removal element movement control mechanism; and a dilating member on the device for performing at least one of centering the device intravascularly, stabilizing the device intravascularly, occluding flow through a vascular lumen, and angioplastically displacing occlusion material.
Claim 25
Dependent Claim
122 words
A vascular occlusion material removal device for removing vascular occlusion material in a vascular lumen, the removal device comprising: an expandable material removal element insertable intravascularly into a patient; a guide wire insertable through the expandable material removal element; the guide wire having a bearing surface located distally thereon which operatively engages an end of the material removal element to cause longitudinal contraction thereof when the guide wire is longitudinally shifted with respect to the material removal element; the guide wire being shiftable within the material removal element; the material removal element being expandable responsive to shifting of the guide wire; the removal element comprising a plurality of braided wires; and an abrasive disposed on the wires for removing vascular occlusion material.
Claim 26
Dependent Claim
122 words
A vascular occlusion material removal device for removing vascular occlusion material in a vascular lumen, the removal device comprising: an expandable material removal element insertable intravascularly into a patient; a guide wire insertable through the expandable material removal element; the guide wire having a bearing surface located distally thereon which operatively engages an end of the material removal element to cause longitudinal contraction thereof when the guide wire is longitudinally shifted with respect to the material removal element; the guide wire being shiftable within the material removal element; the material removal element being expandable responsive to shifting of the guide wire; the removal element comprising a plurality of braided wires; and an abrasive disposed on the wires for removing vascular occlusion material.
Claim 27
Dependent Claim
119 words
A vascular occlusion material removal device for removing vascular occlusion material in a vascular lumen, the removal device comprising: an expandable material removal element insertable intravascularly into a patient; a guide wire insertable through the expandable material removal element; the guide wire having a bearing surface located distally thereon which operatively engages an end of the material removal element to cause longitudinal contraction thereof when the guide wire is longitudinally shifted with respect to the material removal element; the guide wire being shiftable within the material removal element; the material removal element being expandable responsive to shifting of the guide wire; the removal element comprising a plurality of braided wires; and the wires being made from a super-elastic alloy.
Claim 28
Dependent Claim
119 words
A vascular occlusion material removal device for removing vascular occlusion material in a vascular lumen, the removal device comprising: an expandable material removal element insertable intravascularly into a patient; a guide wire insertable through the expandable material removal element; the guide wire having a bearing surface located distally thereon which operatively engages an end of the material removal element to cause longitudinal contraction thereof when the guide wire is longitudinally shifted with respect to the material removal element; the guide wire being shiftable within the material removal element; the material removal element being expandable responsive to shifting of the guide wire; the removal element comprising a plurality of braided wires; and the wires being made from a super-elastic alloy.
Claim 29
Dependent Claim
17 words
A vascular occlusion material removal device as defined in claim 20, wherein the super-elastic alloy is nitinol.
Claim 30
Independent Claim
148 words
A method for removing vascular occlusion material from a vascular lumen comprising the steps of: providing a vascular occlusion material removal device having an expandable occlusion material removal element, wherein the removal element comprises a plurality of braided wires, further comprising an abrasive disposed on the wires; providing a guide wire having a bearing surface located distally thereon which operatively engages an end of the material removal element to cause longitudinal contraction thereof when the guide wire is longitudinally shifted with respect to the material removal element; intravascularly positioning the guide wire distally of the occlusion material; inserting the guide wire into the removal element; intravascularly positioning the removal element over the guide wire distally of the occlusion material; shifting the guide wire with respect to the removal element to expand the element intravascularly; and moving the removal element proximally within the vascular lumen to remove occlusion material.
Claim 31
Independent Claim
148 words
A method for removing vascular occlusion material from a vascular lumen comprising the steps of: providing a vascular occlusion material removal device having an expandable occlusion material removal element, wherein the removal element comprises a plurality of braided wires, further comprising an abrasive disposed on the wires; providing a guide wire having a bearing surface located distally thereon which operatively engages an end of the material removal element to cause longitudinal contraction thereof when the guide wire is longitudinally shifted with respect to the material removal element; intravascularly positioning the guide wire distally of the occlusion material; inserting the guide wire into the removal element; intravascularly positioning the removal element over the guide wire distally of the occlusion material; shifting the guide wire with respect to the removal element to expand the element intravascularly; and moving the removal element proximally within the vascular lumen to remove occlusion material.
Claim 32
Dependent Claim
16 words
A method according to claim 22, further comprising the step of: rotating the removal element intravascularly.
Claim 33
Dependent Claim
87 words
An over-the-wire vascular occlusion material removal device for removing vascular occlusion material from a vascular lumen, the removal device comprising: a flexible vascular occlusion material removal element insertable intravascularly into the vascular lumen for removing vascular occlusion material, the removal element comprising a plurality of shape memory alloy braided wires; a configuration defined by the removal element; the removal element having a memory of the configuration; the removal element being deformable; and wherein the memory is sufficient to allow the removal element to return towards the configuration.
Claim 34
Dependent Claim
87 words
An over-the-wire vascular occlusion material removal device for removing vascular occlusion material from a vascular lumen, the removal device comprising: a flexible vascular occlusion material removal element insertable intravascularly into the vascular lumen for removing vascular occlusion material, the removal element comprising a plurality of shape memory alloy braided wires; a configuration defined by the removal element; the removal element having a memory of the configuration; the removal element being deformable; and wherein the memory is sufficient to allow the removal element to return towards the configuration.
Claim 35
Dependent Claim
18 words
A vascular occlusion material removal device as defined in claim 24, wherein the shape memory alloy is nitinol.
References Cited (Backward Citations)
US1112982A
Cited
US1612697A
Cited
US2498692A
Cited
US2621651A
Cited
DE867144C
Cited
US2816552A
Cited
US3416531A
Cited
US3433226A
Cited
US3352303A
Cited
US3485234A
Cited
US3605725A
Cited
US3568659A
Cited
US3623483A
Cited
US3692029A
Cited
US3894673A
Cited
US4018576A
Cited
US3773034A
Cited
US3868956A
Cited
US3788318A
Cited
US3789852A
Cited
US3923065A
Cited
US3968800A
Cited
US3965909A
Cited
US3996938A
Cited
US4046150A
Cited
US4137906A
Cited
US4195637A
Cited
US4177815A
Cited
US4323071A
Cited
US4323071B1
Cited
GB2020557A
Cited
US4307722A
Cited
US4347846A
Cited
US4273128A
Cited
US4445509A
Cited
WO1983003752A1
Cited
US4465072A
Cited
EP0117519A1
Cited
US4607618A
Cited
US4572186A
Cited
US4842579A
Cited
US4842579B1
Cited
US5002553A
Cited
US4979939A
Cited
US4732154A
Cited
US4894051A
Cited
US4886490A
Cited
US4819634A
Cited
US5135531A
Cited
US5024651A
Cited
US4679557A
Cited
US4577631A
Cited
EP0355861B1
Cited
US4650466A
Cited
US4990134A
Cited
US4990134B1
Cited
US4771774A
Cited
US4696667A
Cited
US5041082A
Cited
EP0254414A1
Cited
US5314407A
Cited
US4838853A
Cited
US4883458A
Cited
US5116350B1
Cited
US5116350A
Cited
US4784636A
Cited
US4895166A
Cited
US4886061A
Cited
US4895560A
Cited
US4921484A
Cited
US4885003A
Cited
US5011488A
Cited
US4957482A
Cited
US5007896A
Cited
US4966604A
Cited
US5034001A
Cited
US5100425A
Cited
US5009659A
Cited
US5030201A
Cited
WO1991017714A1
Cited
US5154724A
Cited
US5490849A
Cited
WO1992003097A1
Cited
WO1992003098A1
Cited
WO1993001753A2
Cited
WO1993001849A1
Cited
US5217474A
Cited
US5135483A
Cited
EP0533321A2
Cited
US5224945A
Cited
WO1993019679A1
Cited
US5176693A
Cited
US5250060A
Cited
US5501694A
Cited
US5540707A
Cited
US5314438A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-08-10 | 2002-02-09 | 2002-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-08-10 | 2006-02-09 | 2006-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-08-10 | 2010-02-09 | 2010-08-11 | $7700.00 | Window Closed / Lapsed |