US5314438A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Abrasive drive shaft device for rotational atherectomy
Assignee: Cardiovascular Systems Inc
•
Filing: 1993-02-02
•
Granted: 1994-05-24
•
Expires: 2013-02-02
Abstract
Abstract An abrasive drive shaft atherectomy device for removing stenotic tissue from an artery. The device includes a flexible, elongated drive shaft having a central lumen for receipt of a guide wire therein and around which the drive shaft may be rotated. The drive shaft is made from one or more helically wound wires. Wire turns of the proximal segment of the drive shaft have a generally constant diameter. Wire turns of a segment of the drive shaft near its distal end have an enlarged diameter. At least part of the enlarged diameter segment includes an external coating of an abrasive material to define an abrasive segment of the drive shaft which, when rotated at high speeds, is usable to remove stenotic tissue from an artery. In a preferred embodiment, the device includes a bushing disposed in the enlarged diameter segment for supporting the enlarged diameter turns of the drive shaft. A gap may be provided in the turns of the drive shaft to permit imaging therethrough by an ultrasound imaging device disposed in the central lumen of the drive shaft. Preferably the drive shaft is made from inner and outer coaxial wire layers helically wound in opposite directions so that the outer layer tends to radially contract and the inner layer tends to radially expand when the drive shaft is rotated in a predetermined direction. In one such embodiment, a toroidal collar is positioned between the inner and outer layers of the enlarged diameter abrasive segment of the drive shaft.
Inventors
- 👤 Leonid Shturman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:26
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/32; A61B17/3205; A61B17/3207; A61B17/320758; A61M; A61M25/00; A61M25/01; A61B2017/00535; A61B2017/00553; A61B2017/00831; A61B2017/00853; A61B2017/00902; A61B2017/00924; A61B17/22; A61B2017/22038; A61B2017/320004; A61B2017/320733; A61B90/00; A61B90/36; A61B90/37; A61B2090/378; A61B2090/3782; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2002/30001; A61F2002/30003; A61F2002/3006; A61F2002/30092; A61F2210/00; A61F2210/0014; A61M25/09
Claims Analysis
Total Claims: 121
Claim 1
Independent Claim
164 words
An abrasive drive shaft atherectomy device comprising a flexible, elongated drive shaft having a central lumen for receipt of a guide wire therein around which the drive shaft may be rotated, the drive shaft being comprised of at least one helically wound wire and having proximal, intermediate and distal segments, wire turns of the proximal segment of the drive shaft having a generally constant diameter, turns of the intermediate segment of the drive shaft having a diameter that progressively increases distally through a proximal portion of such intermediate segment and having a diameter that progressively decreases distally through a distal portion of such intermediate segment, thereby defining an enlarged diameter segment of the drive shaft, at least part of the enlarged diameter intermediate segment including an external coating of an abrasive material to define an abrasive segment of the drive shaft, the intermediate segment of the drive shaft including a gap between adjacent wire turns to define a sonolucent window in the intermediate segment.
Claim 2
Dependent Claim
164 words
An abrasive drive shaft atherectomy device comprising a flexible, elongated drive shaft having a central lumen for receipt of a guide wire therein around which the drive shaft may be rotated, the drive shaft being comprised of at least one helically wound wire and having proximal, intermediate and distal segments, wire turns of the proximal segment of the drive shaft having a generally constant diameter, turns of the intermediate segment of the drive shaft having a diameter that progressively increases distally through a proximal portion of such intermediate segment and having a diameter that progressively decreases distally through a distal portion of such intermediate segment, thereby defining an enlarged diameter segment of the drive shaft, at least part of the enlarged diameter intermediate segment including an external coating of an abrasive material to define an abrasive segment of the drive shaft, the intermediate segment of the drive shaft including a gap between adjacent wire turns to define a sonolucent window in the intermediate segment.
Claim 3
Dependent Claim
50 words
The abrasive drive shaft atherectomy device of claim 1 wherein the wire turns of the drive shaft in the distal portion of the intermediate segment progressively decrease distally in diameter to a diameter not larger than the diameter of the wire turns of the proximal segment of the drive shaft.
Claim 4
Dependent Claim
49 words
The abrasive drive shaft atherectomy device of claim 1 wherein the wire turns of the drive shaft's intermediate segment have a first pitch, at least one wire turn of the intermediate segment having a second, larger pitch to form the gap defining the sonolucent window in the intermediate segment.
Claim 5
Dependent Claim
31 words
The abrasive drive shaft atherectomy device of claim 1 wherein the gap is formed by a change in the pitch of the wire turns of the helically wound wire drive shaft.
Claim 6
Dependent Claim
33 words
The abrasive drive shaft atherectomy device of claim 1 wherein the gap in the intermediate segment of the drive shaft is located generally between the proximal and distal portions of the intermediate segment.
Claim 7
Dependent Claim
73 words
The abrasive drive shaft atherectomy device of claim 1 further comprising an intravascular ultrasonic imaging probe carrying ultrasonic imaging means for imaging tissue of interest, the probe being advancable into the central lumen of the drive shaft to a position acoustically aligning the ultrasonic imaging means with the sonolucent window in the intermediate segment of the drive shaft, permitting acoustic signals generated by the ultrasonic imaging means to propagate through the sonolucent window.
Claim 8
Dependent Claim
21 words
The abrasive drive shaft atherectomy device of claim 6 wherein the ultrasonic imaging means includes an array of ultrasonic transducer elements.
Claim 9
Dependent Claim
24 words
The abrasive drive shaft atherectomy device of claim 6 wherein the abrasive drive shaft is rotatable with respect to the intravascular ultrasonic imaging probe.
Claim 10
Dependent Claim
27 words
The abrasive drive shaft atherectomy device of claim 6 wherein the ultrasonic imaging means is secured to the drive shaft for rotation together with the drive shaft.
Claim 11
Dependent Claim
23 words
The abrasive drive shaft atherectomy device of claim 6 wherein the ultrasonic imaging means comprises an ultrasonic transducer element and an acoustic reflector.
Claim 12
Dependent Claim
22 words
The abrasive drive shaft atherectomy device of claim 10 wherein the acoustic reflector is rotatable with respect to the ultrasonic transducer element.
Claim 13
Dependent Claim
24 words
The abrasive drive shaft atherectomy device of claim 10 wherein the acoustic reflector and the ultrasonic transducer element are rotatable together as a unit.
Claim 14
Dependent Claim
21 words
The abrasive drive shaft atherectomy device of claim 6 wherein the intravascular ultrasonic imaging probe comprises an intravascular ultrasonic imaging catheter.
Claim 15
Dependent Claim
21 words
The abrasive drive shaft atherectomy device of claim 6 wherein the intravascular ultrasonic imaging probe comprises an ultrasonic imaging guide wire.
Claim 16
Dependent Claim
79 words
The abrasive drive shaft atherectomy device of claim 1 wherein the intermediate segment of the drive shaft includes a gap between adjacent wire turns to define a window in the intermediate segment, the abrasive shaft atherectomy device further including imaging means, advancable into the central lumen of the drive shaft to a position aligning said imaging means with the window in the intermediate segment of the drive shaft, for imaging tissue surrounding the intermediate segment of the drive shaft.
Claim 17
Dependent Claim
60 words
The abrasive drive shaft atherectomy device of claim 1 further comprising a bushing disposed within the intermediate segment of the drive shaft, the bushing having an outer surface engaging and supporting the wire turns of at least a portion of the intermediate segment, and having an inner longitudinal bore therethrough, the bore being generally coaxial with the drive shaft lumen.
Claim 18
Dependent Claim
24 words
The abrasive drive shaft atherectomy device of claim 16 wherein the diameter of the bushing bore is sized to receive the guide wire therein.
Claim 19
Dependent Claim
18 words
The abrasive drive shaft atherectomy device of claim 16 wherein the bushing is made of a flexible material.
Claim 20
Dependent Claim
18 words
The abrasive drive shaft atherectomy device of claim 16 wherein the bushing is made of a sonolucent material.
Claim 21
Dependent Claim
15 words
The abrasive drive shaft atherectomy device of claim 19 wherein the sonolucent material is silicone.
Claim 22
Dependent Claim
19 words
The abrasive drive shaft atherectomy device of claim 16 wherein the bushing is made of a low friction material.
Claim 23
Dependent Claim
16 words
The abrasive drive shaft atherectomy device of claim 21 wherein the low friction material is polytetrafluoroethylene.
Claim 24
Dependent Claim
24 words
The abrasive drive shaft atherectomy device of claim 16 wherein the inner surface of the bushing bore is made of a low friction material.
Claim 25
Dependent Claim
35 words
The abrasive drive shaft atherectomy device of claim 1 further comprising a flexible, low friction sheath covering at least that portion of the drive shaft immediately proximal to the intermediate segment of the drive shaft.
Claim 26
Dependent Claim
16 words
The abrasive drive shaft atherectomy device of claim 24 wherein the sheath is made of polytetrafluoroethylene.
Claim 27
Dependent Claim
23 words
The abrasive drive shaft atherectomy device of claim 24 further comprising a low friction sheath covering the distal segment of the drive shaft.
Claim 28
Dependent Claim
35 words
The abrasive drive shaft atherectomy device of claim 1 further comprising a flexible, low friction coating covering at least that portion of the drive shaft immediately proximal to the intermediate segment of the drive shaft.
Claim 29
Dependent Claim
16 words
The abrasive drive shaft atherectomy device of claim 27 wherein the coating is made of polytetrafluoroethylene.
Claim 30
Dependent Claim
22 words
The abrasive drive shaft atherectomy device of claim 1 wherein the drive shaft is made from wire substantially completely coated with polytetrafluoroethylene.
Claim 31
Dependent Claim
35 words
The abrasive drive shaft atherectomy device of claim 1 wherein the abrasive material comprises a plurality of abrasive particles which are secured directly to the wire turns of the drive shaft by a bonding material.
Claim 32
Dependent Claim
31 words
The abrasive drive shaft atherectomy device of claim 1 wherein the abrasive material comprises a plurality of abrasive particles which are secured directly to the drive shaft by a bonding material.
Claim 33
Dependent Claim
44 words
The abrasive drive shaft atherectomy device of claim 30 wherein the bonding material is applied to adjacent turns of the helically wound wire to secure the abrasive material to such turns and to secure at least some of such adjacent turns to one another.
Claim 34
Dependent Claim
41 words
The abrasive drive shaft atherectomy device of claim 30 wherein the bonding material is applied to adjacent turns of the helically wound wire to secure the abrasive material to such turns without securing any of such adjacent turns to one another.
Claim 35
Dependent Claim
46 words
The abrasive drive shaft atherectomy device of claim 31 wherein the abrasive particles are at least partially embedded in the bonding material, the thickness of the bonding material between substantially all of the abrasive particles and the drive shaft being not more than about 15 μm.
Claim 36
Dependent Claim
46 words
The abrasive drive shaft atherectomy device of claim 31 wherein the abrasive particles are at least partially embedded in the bonding material, the thickness of the bonding material between substantially all of the abrasive particles and the drive shaft being not more than about 5 μm.
Claim 37
Dependent Claim
26 words
The abrasive drive shaft atherectomy device of claim 1 wherein the abrasive material comprises diamond chips having a largest dimension of substantially 30 μm or less.
Claim 38
Dependent Claim
26 words
The abrasive drive shaft atherectomy device of claim 1 wherein the abrasive material comprises diamond chips having a largest dimension of substantially 25 μm or less.
Claim 39
Dependent Claim
22 words
The abrasive drive shaft atherectomy device of claim 1 wherein the coating of abrasive material is not thicker than about 45 μm.
Claim 40
Dependent Claim
22 words
The abrasive drive shaft atherectomy device of claim 1 wherein the coating of abrasive material is not thicker than about 35 μm.
Claim 41
Dependent Claim
49 words
The abrasive drive shaft atherectomy device of claim 1 wherein the maximum diameter of the abrasive segment, including the thickness of the abrasive coating, is not more than about 90 μm larger than the maximum outer diameter of the wire turns of the abrasive segment of the drive shaft.
Claim 42
Dependent Claim
49 words
The abrasive drive shaft atherectomy device of claim 1 wherein the maximum diameter of the abrasive segment, including the thickness of the abrasive coating, is not more than about 70 μm larger than the maximum outer diameter of the wire turns of the abrasive segment of the drive shaft.
Claim 43
Dependent Claim
28 words
The abrasive drive shaft atherectomy device of claim 1 wherein the coating of abrasive material is of a generally uniform thickness throughout the length of the abrasive segment.
Claim 44
Dependent Claim
20 words
The abrasive drive shaft atherectomy device of claim 1 wherein the drive shaft comprises a plurality of helically wound wires.
Claim 45
Dependent Claim
54 words
The abrasive drive shaft atherectomy device of claim 1 wherein the drive shaft is comprised of inner and outer co-axial wire layers helically wound in opposite directions so that the outer layer tends to radially contract and the inner layer tends to radially expand when the drive shaft is rotated in a predetermined direction.
Claim 46
Dependent Claim
37 words
The abrasive drive shaft atherectomy device of claim 44 wherein the outer wire layer extends along substantially the entire proximal segment of the drive shaft and terminates just proximal to the intermediate segment of the drive shaft.
Claim 47
Dependent Claim
36 words
The abrasive drive shaft atherectomy device of claim 44 wherein the outer wire layer extends along substantially all of the proximal and intermediate segments, and at least partially along the distal segment of the drive shaft.
Claim 48
Dependent Claim
283 words
An abrasive drive shaft atherectomy device comprising a flexible, elongated drive shaft having a central lumen for receipt of a guide wire therein around which the drive shaft may be rotated, the drive shaft being comprised of at least one helically wound wire and having proximal, intermediate and distal segments, wire turns of the proximal segment of the drive shaft having a generally constant diameter, turns of the intermediate segment of the drive shaft having a diameter that progressively increases distally through a proximal portion of such intermediate segment and having a diameter that progressively decreases distally through a distal portion of such intermediate segment to a diameter not larger than the diameter of the proximally segment of the drive shaft, thereby defining an enlarged diameter segment of the drive shaft, at least part of the enlarged diameter intermediate segment including an external coating of diamond chips secured directly to the drive shaft wire by a bonding material to define an abrasive segment of the drive shaft, the coating of diamond chips being of a generally uniform thickness throughout the length of the abrasive segment and the thickness of the bonding material between substantially all of the diamond chips and the drive shaft being not more than about 15 μm, the atherectomy device further including a bushing disposed within the intermediate segment of the drive shaft, the bushing having an outer surface engaging and supporting the wire turns of at least the central portion of the intermediate segment, the bushing having an inner longitudinal bore therethrough which is generally coaxial with the drive shaft lumen, the bushing bore having a low friction inner surface and being sized to receive the guide wire therein.
Claim 49
Dependent Claim
283 words
An abrasive drive shaft atherectomy device comprising a flexible, elongated drive shaft having a central lumen for receipt of a guide wire therein around which the drive shaft may be rotated, the drive shaft being comprised of at least one helically wound wire and having proximal, intermediate and distal segments, wire turns of the proximal segment of the drive shaft having a generally constant diameter, turns of the intermediate segment of the drive shaft having a diameter that progressively increases distally through a proximal portion of such intermediate segment and having a diameter that progressively decreases distally through a distal portion of such intermediate segment to a diameter not larger than the diameter of the proximally segment of the drive shaft, thereby defining an enlarged diameter segment of the drive shaft, at least part of the enlarged diameter intermediate segment including an external coating of diamond chips secured directly to the drive shaft wire by a bonding material to define an abrasive segment of the drive shaft, the coating of diamond chips being of a generally uniform thickness throughout the length of the abrasive segment and the thickness of the bonding material between substantially all of the diamond chips and the drive shaft being not more than about 15 μm, the atherectomy device further including a bushing disposed within the intermediate segment of the drive shaft, the bushing having an outer surface engaging and supporting the wire turns of at least the central portion of the intermediate segment, the bushing having an inner longitudinal bore therethrough which is generally coaxial with the drive shaft lumen, the bushing bore having a low friction inner surface and being sized to receive the guide wire therein.
Claim 50
Dependent Claim
120 words
The abrasive drive shaft atherectomy device of claim 47 wherein the bushing is sonolucent, and the intermediate segment of the drive shaft includes a gap between adjacent wire turns to define a sonolucent window located generally between the proximal and distal portions of the intermediate segment of the drive shaft, the abrasive drive shaft atherectomy device further including an intravascular ultrasonic imaging probe carrying ultrasonic imaging means for imaging tissue of interest, the probe being advancable into the central lumen of the drive shaft to a position acoustically aligning the ultrasonic imaging means within the sonolucent window in the intermediate segment of the drive shaft, permitting acoustic signals generated by the ultrasonic imaging means to propagate through the sonolucent window.
Claim 51
Dependent Claim
195 words
An abrasive drive shaft atherectomy device comprising a flexible, elongated drive shaft having a central lumen for receipt of a guide wire therein around which the drive shaft may be rotated, the drive shaft being comprised of at least one helically wound wire and having proximal, intermediate and distal segments, wire turns of the proximal segment of the drive shaft having a generally constant diameter, turns of the intermediate segment of the drive shaft having a diameter that progressively increases distally through a proximal portion of such intermediate segment and having a diameter that progressively decreases distally through a distal portion of such intermediate segment, thereby defining an enlarged diameter segment of the drive shaft, at least part of the enlarged diameter intermediate segment including an external coating of an abrasive material to define an abrasive segment of the drive shaft, the device further including a bushing disposed within the intermediate segment of the drive shaft, the bushing having an outer surface engaging and supporting the wire turns of at least a central portion of the intermediate segment, and having an inner longitudinal bore therethrough, the bore being generally coaxial with the drive shaft lumen.
Claim 52
Dependent Claim
195 words
An abrasive drive shaft atherectomy device comprising a flexible, elongated drive shaft having a central lumen for receipt of a guide wire therein around which the drive shaft may be rotated, the drive shaft being comprised of at least one helically wound wire and having proximal, intermediate and distal segments, wire turns of the proximal segment of the drive shaft having a generally constant diameter, turns of the intermediate segment of the drive shaft having a diameter that progressively increases distally through a proximal portion of such intermediate segment and having a diameter that progressively decreases distally through a distal portion of such intermediate segment, thereby defining an enlarged diameter segment of the drive shaft, at least part of the enlarged diameter intermediate segment including an external coating of an abrasive material to define an abrasive segment of the drive shaft, the device further including a bushing disposed within the intermediate segment of the drive shaft, the bushing having an outer surface engaging and supporting the wire turns of at least a central portion of the intermediate segment, and having an inner longitudinal bore therethrough, the bore being generally coaxial with the drive shaft lumen.
Claim 53
Dependent Claim
50 words
The abrasive drive shaft atherectomy device of claim 49 wherein the wire turns of the drive shaft in the distal portion of the intermediate segment progressively decrease distally in diameter to a diameter not larger than the diameter of the wire turns of the proximal segment of the drive shaft.
Claim 54
Dependent Claim
33 words
The abrasive drive shaft atherectomy device of claim 49 wherein the intermediate segment of the drive shaft includes a gap between adjacent wire turns to define a sonolucent window in the intermediate segment.
Claim 55
Dependent Claim
48 words
The abrasive drive shaft atherectomy device of claim 51 wherein the turns of the drive shaft's intermediate segment have a first pitch, at least one wire turn of the intermediate segment having a second, larger pitch to form the gap defining the sonolucent window in the intermediate segment.
Claim 56
Dependent Claim
31 words
The abrasive drive shaft atherectomy device of claim 51 wherein the gap is formed by a change in the pitch of the wire turns of the helically wound wire drive shaft.
Claim 57
Dependent Claim
33 words
The abrasive drive shaft atherectomy device of claim 51 wherein the gap in the intermediate segment of the drive shaft is located generally between the proximal and distal portions of the intermediate segment.
Claim 58
Dependent Claim
73 words
The abrasive drive shaft atherectomy device of claim 51 further comprising an intravascular ultrasonic imaging probe carrying ultrasonic imaging means for imaging tissue of interest, the probe being advanceable into the central lumen of the drive shaft to a position acoustically aligning the ultrasonic imaging means with the sonolucent window in the intermediate segment of the drive shaft, permitting acoustic signals generated by the ultrasonic imaging means to propagate through the sonolucent window.
Claim 59
Dependent Claim
21 words
The abrasive drive shaft atherectomy device of claim 55 wherein the ultrasonic imaging means includes an array of ultrasonic transducer elements.
Claim 60
Dependent Claim
24 words
The abrasive drive shaft atherectomy device of claim 55 wherein the abrasive drive shaft is rotatable with respect to the intravascular ultrasonic imaging probe.
Claim 61
Dependent Claim
27 words
The abrasive drive shaft atherectomy device of claim 55 wherein the ultrasonic imaging means is secured to the drive shaft for rotation together with the drive shaft.
Claim 62
Dependent Claim
23 words
The abrasive drive shaft atherectomy device of claim 55 wherein the ultrasonic imaging means comprises an ultrasonic transducer element and an acoustic reflector.
Claim 63
Dependent Claim
22 words
The abrasive drive shaft atherectomy device of claim 59 wherein the acoustic reflector is rotatable with respect to the ultrasonic transducer element.
Claim 64
Dependent Claim
24 words
The abrasive drive shaft atherectomy device of claim 59 wherein the acoustic reflector and the ultrasonic transducer element are rotatable together as a unit.
Claim 65
Dependent Claim
21 words
The abrasive drive shaft atherectomy device of claim 55 wherein the intravascular ultrasonic imaging probe comprises an intravascular ultrasonic imaging catheter.
Claim 66
Dependent Claim
21 words
The abrasive drive shaft atherectomy device of claim 55 wherein the intravascular ultrasonic imaging probe comprises an ultrasonic imaging guide wire.
Claim 67
Dependent Claim
80 words
The abrasive drive shaft atherectomy device of claim 49 wherein the intermediate segment of the drive shaft includes a gap between adjacent wire turns to define a window in the intermediate segment, the abrasive drive shaft atherectomy device further including imaging means, advanceable into the central lumen of the drive shaft to a position aligning said imaging means with the window in the intermediate segment of the drive shaft, for imaging tissue surrounding the intermediate segment of the drive shaft.
Claim 68
Dependent Claim
24 words
The abrasive drive shaft atherectomy device of claim 49 wherein the diameter of the bushing bore is sized to receive the guide wire therein.
Claim 69
Dependent Claim
18 words
The abrasive drive shaft atherectomy device of claim 49 wherein the bushing is made of a flexible material.
Claim 70
Dependent Claim
18 words
The abrasive drive shaft atherectomy device of claim 49 wherein the bushing is made of a sonolucent material.
Claim 71
Dependent Claim
15 words
The abrasive drive shaft atherectomy device of claim 67 wherein the sonolucent material is silicone.
Claim 72
Dependent Claim
19 words
The abrasive drive shaft atherectomy device of claim 49 wherein the bushing is made of a low friction material.
Claim 73
Dependent Claim
16 words
The abrasive drive shaft atherectomy device of claim 69 wherein the low friction material is polytetrafluoroethylene.
Claim 74
Dependent Claim
24 words
The abrasive drive shaft atherectomy device of claim 49 wherein the inner surface of the bushing bore is made of a low friction material.
Claim 75
Dependent Claim
35 words
The abrasive drive shaft atherectomy device of claim 49 further comprising a flexible, low friction sheath covering at least that portion of the drive shaft immediately proximal to the intermediate segment of the drive shaft.
Claim 76
Dependent Claim
16 words
The abrasive drive shaft atherectomy device of claim 72 wherein the sheath is made of polytetrafluoroethylene.
Claim 77
Dependent Claim
23 words
The abrasive drive shaft atherectomy device of claim 72 further comprising a low friction sheath covering the distal segment of the drive shaft.
Claim 78
Dependent Claim
35 words
The abrasive drive shaft atherectomy device of claim 49 further comprising a flexible, low friction coating covering at least that portion of the drive shaft immediately proximal to the intermediate segment of the drive shaft.
Claim 79
Dependent Claim
16 words
The abrasive drive shaft atherectomy device of claim 75 wherein the coating is made of polytetrafluoroethylene.
Claim 80
Dependent Claim
22 words
The abrasive drive shaft atherectomy device of claim 49 wherein the drive shaft is made from wire substantially completely coated with polytetrafluoroethylene.
Claim 81
Dependent Claim
35 words
The abrasive drive shaft atherectomy device of claim 49 wherein the abrasive material comprises a plurality of abrasive particles which are secured directly to the wire turns of the drive shaft by a bonding material.
Claim 82
Dependent Claim
31 words
The abrasive drive shaft atherectomy device of claim 49 wherein the abrasive material comprises a plurality of abrasive particles which are secured directly to the drive shaft by a bonding material.
Claim 83
Dependent Claim
44 words
The abrasive drive shaft atherectomy device of claim 78 wherein the bonding material is applied to adjacent turns of the helically wound wire to secure the abrasive material to such turns and to secure at least some of such adjacent turns to one another.
Claim 84
Dependent Claim
41 words
The abrasive drive shaft atherectomy device of claim 78 wherein the bonding material is applied to adjacent turns of the helically wound wire to secure the abrasive material to such turns without securing any of such adjacent turns to one another.
Claim 85
Dependent Claim
26 words
The abrasive drive shaft atherectomy device of claim 49 wherein the abrasive material comprises diamond chips having a largest dimension of substantially 30 μm or less.
Claim 86
Dependent Claim
22 words
The abrasive drive shaft atherectomy device of claim 49 wherein the coating of abrasive material is not thicker than about 48 μm.
Claim 87
Dependent Claim
49 words
The abrasive drive shaft atherectomy device of claim 49 wherein the maximum diameter of the abrasive segment, including the thickness of the abrasive coating, is not more than about 90 μm larger than the maximum outer diameter of the wire turns of the abrasive segment of the drive shaft.
Claim 88
Dependent Claim
28 words
The abrasive drive shaft atherectomy device of claim 49 wherein the coating of abrasive material is of a generally uniform thickness throughout the length of the abrasive segment.
Claim 89
Dependent Claim
20 words
The abrasive drive shaft atherectomy device of claim 49 wherein the drive shaft comprises a plurality of helically wound wires.
Claim 90
Dependent Claim
54 words
The abrasive drive shaft atherectomy device of claim 49 wherein the drive shaft is comprised of inner and outer co-axial wire layers helically wound in opposite directions so that the outer layer tends to radially contract and the inner layer tends to radially expand when the drive haft is rotated in a predetermined direction.
Claim 91
Dependent Claim
37 words
The abrasive drive shaft atherectomy device of claim 87 wherein the outer wire layer extends along substantially the entire proximal segment of the drive shaft and terminates just proximal to the intermediate segment of the drive shaft.
Claim 92
Dependent Claim
36 words
The abrasive drive shaft atherectomy device of claim 87 wherein the outer wire layer extends along substantially all of the proximal and intermediate segments, and at least partially along the distal segment of the drive shaft.
Claim 93
Dependent Claim
206 words
An abrasive drive shaft atherectomy device comprising a flexible, elongated drive shaft having a central lumen for receipt of a guide wire therein around which the drive shaft may be rotated, the drive shaft being comprised of inner and outer co-axial wire layers helically wound in opposite directions so that the outer layer tends to radially contract and the inner layer tends to radially expand when the rive shaft is rotated in a predetermined direction, the drive shaft having proximal, intermediate and distal segments, wire turns of the proximal segment of the drive shaft having a generally constant diameter, wire turns of the outer layer of the intermediate segment of the drive shaft having a diameter that progressively increases distally through a proximal portion of such intermediate segment and having a diameter that progressively decreases distally through a distal portion of such intermediate segment, thereby defining an enlarged diameter segment of the drive shaft, at least part of the enlarged diameter intermediate segment including an external coating of an abrasive material to define an abrasive segment of the drive shaft, and further including a generally toroidal collar positioned in the intermediate segment of the drive shaft between the inner and outer layers of the drive shaft.
Claim 94
Dependent Claim
206 words
An abrasive drive shaft atherectomy device comprising a flexible, elongated drive shaft having a central lumen for receipt of a guide wire therein around which the drive shaft may be rotated, the drive shaft being comprised of inner and outer co-axial wire layers helically wound in opposite directions so that the outer layer tends to radially contract and the inner layer tends to radially expand when the rive shaft is rotated in a predetermined direction, the drive shaft having proximal, intermediate and distal segments, wire turns of the proximal segment of the drive shaft having a generally constant diameter, wire turns of the outer layer of the intermediate segment of the drive shaft having a diameter that progressively increases distally through a proximal portion of such intermediate segment and having a diameter that progressively decreases distally through a distal portion of such intermediate segment, thereby defining an enlarged diameter segment of the drive shaft, at least part of the enlarged diameter intermediate segment including an external coating of an abrasive material to define an abrasive segment of the drive shaft, and further including a generally toroidal collar positioned in the intermediate segment of the drive shaft between the inner and outer layers of the drive shaft.
Claim 95
Dependent Claim
58 words
The abrasive drive shaft atherectomy device of claim 90 wherein the wire turns of the outer layer of the drive shaft in the distal portion of the intermediate segment progressively decrease distally in diameter to a diameter not larger than the diameter of the wire turns of the outer layer of the proximal segment of the drive shaft.
Claim 96
Dependent Claim
18 words
The abrasive drive shaft atherectomy device of claim 90 wherein the collar is made of a flexible material.
Claim 97
Dependent Claim
17 words
The abrasive drive shaft atherectomy device of claim 90 wherein the collar is made of a metal.
Claim 98
Dependent Claim
18 words
The abrasive drive shaft atherectomy device of claim 90 wherein the collar is made of a plastic material.
Claim 99
Dependent Claim
35 words
The abrasive drive shaft atherectomy device of claim 90 further comprising a flexible, low friction sheath covering at least that portion of the drive shaft immediately proximal to the intermediate segment of the drive shaft.
Claim 100
Dependent Claim
16 words
The abrasive drive shaft atherectomy device of claim 95 wherein the sheath is made of polytetrafluoroethylene.
Claim 101
Dependent Claim
23 words
The abrasive drive shaft atherectomy device of claim 95 further comprising a low friction sheath covering the distal segment of the drive shaft.
Claim 102
Dependent Claim
35 words
The abrasive drive shaft atherectomy device of claim 90 further comprising a flexible, low friction coating covering at least that portion of the drive shaft immediately proximal to the intermediate segment of the drive shaft.
Claim 103
Dependent Claim
16 words
The abrasive drive shaft atherectomy device of claim 98 wherein the coating is made of polytetrafluoroethylene.
Claim 104
Dependent Claim
22 words
The abrasive drive shaft atherectomy device of claim 90 wherein the drive shaft is made from wire substantially completely coated with polytetrafluoroethylene.
Claim 105
Dependent Claim
35 words
The abrasive drive shaft atherectomy device of claim 90 wherein the abrasive material comprises a plurality of abrasive particles which are secured directly to the wire turns of the drive shaft by a bonding material.
Claim 106
Dependent Claim
31 words
The abrasive drive shaft atherectomy device of claim 90 wherein the abrasive material comprises a plurality of abrasive particles which are secured directly to the drive shaft by a bonding material.
Claim 107
Dependent Claim
44 words
The abrasive drive shaft atherectomy device of claim 101 wherein the bonding material is applied to adjacent turns of the helically wound wire to secure the abrasive material to such turns and to secure at least some of such adjacent turns to one another.
Claim 108
Dependent Claim
41 words
The abrasive drive shaft atherectomy device of claim 101 wherein the bonding material is applied to adjacent turns of the helically wound wire to secure the abrasive material to such turns without securing any of such adjacent turns to one another.
Claim 109
Dependent Claim
26 words
The abrasive drive shaft atherectomy device of claim 90 wherein the abrasive material comprises diamond chips having a largest dimension of substantially 30 μm or less.
Claim 110
Dependent Claim
22 words
The abrasive drive shaft atherectomy device of claim 90 wherein the coating of abrasive material is not thicker than about 45 μm.
Claim 111
Dependent Claim
49 words
The abrasive drive shaft atherectomy device of claim 90 wherein the maximum diameter of the abrasive segment, including the thickness of the abrasive coating, is not more than about 90 μm larger than the maximum outer diameter of the wire turns of the abrasive segment of the drive shaft.
Claim 112
Dependent Claim
28 words
The abrasive drive shaft atherectomy device of claim 90 wherein the coating of abrasive material is of a generally uniform thickness throughout the length of the abrasive segment.
Claim 113
Dependent Claim
23 words
The abrasive drive shaft atherectomy device of claim 90 wherein each layer of the drive shaft comprises a plurality of helically wound wires.
Claim 114
Dependent Claim
36 words
The abrasive drive shaft atherectomy device of claim 90 wherein the outer wire layer extends along substantially all of the proximal and intermediate segments, and at least partially along the distal segment of the drive shaft.
Claim 115
Dependent Claim
183 words
The abrasive drive shaft atherectomy device comprising a flexible, elongated drive shaft having a central lumen for receipt of a guide wire therein around which the drive shaft may be rotated, the drive shaft being comprised of at least two helically wound wires forming inner and outer co-axial wire layers helically wound in opposite directions so that the outer layer tends to radially contract and the inner layer tends to radially expand when the drive shaft is rotated in a predetermined direction; and drive shaft having proximal, intermediate and distal segments, wire turns of the proximal segment of the drive shaft having a generally constant diameter, wire turns of the intermediate segment of the drive shaft having a diameter that progressively increases distally through a proximal portion of such intermediate segment and having a diameter that progressively decreases distally through a distal portion of such intermediate segment, thereby defining an enlarged diameter segment of the drive shaft, at least part of the enlarged diameter intermediate segment including an external coating of an abrasive material to define an abrasive segment of the drive shaft.
Claim 116
Dependent Claim
183 words
The abrasive drive shaft atherectomy device comprising a flexible, elongated drive shaft having a central lumen for receipt of a guide wire therein around which the drive shaft may be rotated, the drive shaft being comprised of at least two helically wound wires forming inner and outer co-axial wire layers helically wound in opposite directions so that the outer layer tends to radially contract and the inner layer tends to radially expand when the drive shaft is rotated in a predetermined direction; and drive shaft having proximal, intermediate and distal segments, wire turns of the proximal segment of the drive shaft having a generally constant diameter, wire turns of the intermediate segment of the drive shaft having a diameter that progressively increases distally through a proximal portion of such intermediate segment and having a diameter that progressively decreases distally through a distal portion of such intermediate segment, thereby defining an enlarged diameter segment of the drive shaft, at least part of the enlarged diameter intermediate segment including an external coating of an abrasive material to define an abrasive segment of the drive shaft.
Claim 117
Dependent Claim
228 words
The abrasive drive shaft atherectomy device comprising a flexible, elongated drive shaft having a central lumen for receipt of a guide wire therein around which the drive shaft may be rotated, the drive shaft being comprised of at least two helically wound wires forming inner and outer co-axial wire layer helically wound in opposite directions so that the outer layer tends to radially contract and the inner layer tends to radially expand when the drive shaft is rotated in a predetermined direction, the drive shaft having proximal, intermediate and distal segments; the outer wire layer extending along substantially the entire proximal segment of the drive shaft, terminating just proximal to the intermediate segment of the drive shaft and having a generally constant diameter; wire turns of the inner layer of the drive shaft extending along substantially the entire length of the drive shaft, such wire turns having a generally constant diameter along substantially the entire proximal segment of the drive shaft, having a diameter that progressively increases distally through a proximal portion of the intermediate segment, and having a diameter that progressively decreases distally through a distal portion of the intermediate segment, thereby defining an enlarged diameter segment of the drive shaft, at least part of the enlarged diameter intermediate segment including an external coating of an abrasive material to define an abrasive segment of the drive shaft.
Claim 118
Dependent Claim
228 words
The abrasive drive shaft atherectomy device comprising a flexible, elongated drive shaft having a central lumen for receipt of a guide wire therein around which the drive shaft may be rotated, the drive shaft being comprised of at least two helically wound wires forming inner and outer co-axial wire layer helically wound in opposite directions so that the outer layer tends to radially contract and the inner layer tends to radially expand when the drive shaft is rotated in a predetermined direction, the drive shaft having proximal, intermediate and distal segments; the outer wire layer extending along substantially the entire proximal segment of the drive shaft, terminating just proximal to the intermediate segment of the drive shaft and having a generally constant diameter; wire turns of the inner layer of the drive shaft extending along substantially the entire length of the drive shaft, such wire turns having a generally constant diameter along substantially the entire proximal segment of the drive shaft, having a diameter that progressively increases distally through a proximal portion of the intermediate segment, and having a diameter that progressively decreases distally through a distal portion of the intermediate segment, thereby defining an enlarged diameter segment of the drive shaft, at least part of the enlarged diameter intermediate segment including an external coating of an abrasive material to define an abrasive segment of the drive shaft.
Claim 119
Dependent Claim
228 words
An abrasive drive shaft atherectomy device comprising a flexible, elongated drive shaft having a central lumen for receipt of a guide wire therein around which the drive shaft may be rotated, the drive shaft being comprised of at least two helically wound wires forming inner and outer co-axial wire layers helically wound in opposite directions so that the outer layer tends to radially contract and the inner layer tends to radially expand when the drive shaft is rotated in a predetermined direction, the drive shaft having proximal, intermediate and distal segments; the inner wire layer extending along substantially the entire length of the drive shaft and having a generally constant diameter; wire turns of the outer layer of the dive shaft extending along substantially all of the proximal and intermediate segments and at least partially along the distal segment of the drive shaft; such wire turns of the outer layer having a diameter that is substantially constant along substantially the entire proximal segment of the drive shaft, that progressively increases distally through a proximal portion of the intermediate segment, and that progressively decreases distally through a distal portion of the intermediate segment, thereby defining an enlarged diameter segment of the drive shaft, at least part of the enlarged diameter intermediate segment including an external coating of an abrasive material to define an abrasive segment of the drive shaft.
Claim 120
Dependent Claim
228 words
An abrasive drive shaft atherectomy device comprising a flexible, elongated drive shaft having a central lumen for receipt of a guide wire therein around which the drive shaft may be rotated, the drive shaft being comprised of at least two helically wound wires forming inner and outer co-axial wire layers helically wound in opposite directions so that the outer layer tends to radially contract and the inner layer tends to radially expand when the drive shaft is rotated in a predetermined direction, the drive shaft having proximal, intermediate and distal segments; the inner wire layer extending along substantially the entire length of the drive shaft and having a generally constant diameter; wire turns of the outer layer of the dive shaft extending along substantially all of the proximal and intermediate segments and at least partially along the distal segment of the drive shaft; such wire turns of the outer layer having a diameter that is substantially constant along substantially the entire proximal segment of the drive shaft, that progressively increases distally through a proximal portion of the intermediate segment, and that progressively decreases distally through a distal portion of the intermediate segment, thereby defining an enlarged diameter segment of the drive shaft, at least part of the enlarged diameter intermediate segment including an external coating of an abrasive material to define an abrasive segment of the drive shaft.
Claim 121
Dependent Claim
35 words
The abrasive drive shaft atherectomy device of claim 113 further comprising a toroidal collar positioned in the intermediate segment of the drive shaft and disposed between the inner and outer layers of the drive shaft.
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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) | 1997-05-23 | 1997-11-22 | 1998-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-05-23 | 2001-11-22 | 2002-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-05-23 | 2005-11-22 | 2006-05-24 | $7700.00 | Window Closed / Lapsed |