Patent GB2187463A successfully refreshed from Google Patents.
Patent US20020010487A1 successfully refreshed from Google Patents.
US20020010487A1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expansible shearing catheters for thrombus removal
Assignee: Covidien LP
•
Filing: 2001-03-30
•
Granted: —
•
Expires: 2021-03-30
Abstract
Abstract Devices, methods, kits, and methods remove clot material from the vasculature and other body lumens. Expansible baskets may be used as cooperating radially expansible shearing members. Helically oriented struts of each basket may wind in a uniform circumferential direction. The struts can be independently flexible, allowing the shearing members to flex axially together. The inner basket may be rotatably driven and may use an axial pump extending proximally from the shearing members and/or a distal penetrator for advancing into an occlusion which inhibits guidewire access. The struts may slide substantially continuously across each other, and may be sufficiently aggressive for highly effective thrombectomy.
Inventors
- 👤 Michael Evans
- 👤 Denise Demarais
- 👤 Stephen Leeflang
- 👤 Christian Eversull
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:20
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/32; A61B17/3205; A61B17/3207; A61B17/320725; A61B17/22; A61B17/221; A61B17/320758; A61B17/320783; A61B2017/00681; A61B2017/00685; A61B2017/22094; A61B2017/2212; A61B90/00; A61B90/08; A61B2090/0801; A61B2090/08021
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
86 words
1 . A thrombectomy catheter comprising: a flexible tubular body having a proximal end and a distal end; an outer shearing member attached near the distal end, the outer member having a perforate inner surface; an inner shearing member rotatably disposed within the outer member, the inner member having a proximal portion, a distal portion, and a circumferential series of struts extending therebetween, the struts sliding along the inner surface of the outer shearing member for shearing of clot material when the inner shearing member rotates.
Claim 2
Dependent Claim
86 words
1 . A thrombectomy catheter comprising: a flexible tubular body having a proximal end and a distal end; an outer shearing member attached near the distal end, the outer member having a perforate inner surface; an inner shearing member rotatably disposed within the outer member, the inner member having a proximal portion, a distal portion, and a circumferential series of struts extending therebetween, the struts sliding along the inner surface of the outer shearing member for shearing of clot material when the inner shearing member rotates.
Claim 3
Dependent Claim
48 words
2 . The thrombectomy catheter of claim 1 , wherein the inner member rotates about an axis, and wherein the inner and outer shearing bodies are sufficiently flexible to deflect the axis laterally when the outer shearing member engages a surrounding vessel and the inner member rotates therein.
Claim 4
Dependent Claim
43 words
3 . The thrombectomy catheter of claim 1 , wherein the struts comprise helical struts and uniformly coil distally toward a first circumferential orientation so that rotation of the inner shearing member toward the first circumferential orientation consistently urges sheared clot material proximally.
Claim 5
Dependent Claim
30 words
4 . The thrombectomy catheter of claim 1 , wherein the inner shearing member comprises tube material, the struts being separated by laser cut surfaces between adjacent tube material portions.
Claim 6
Dependent Claim
25 words
5 . The thrombectomy catheter of claim 4 , further comprising an expansible covering extending between adjacent struts of the outer basket to capture debris.
Claim 7
Dependent Claim
52 words
6 . The thrombectomy catheter of claim 4 , wherein the outer shearing member comprises outer tube material having a proximal outer portion, a distal outer portion and a circumferential series of outer struts extending helically therebetween, the struts being separated by laser cut outer surfaces between outer adjacent tube material portions.
Claim 8
Dependent Claim
31 words
7 . The thrombectomy catheter of claim 1 , wherein the struts are affixed together at the proximal portion and at the distal portion, and wherein the struts flex independently therebetween.
Claim 9
Dependent Claim
28 words
8 . The thrombectomy catheter of claim 1 , wherein the struts are helically oriented, and wherein a local pitch of the struts varies axially along the struts.
Claim 10
Dependent Claim
35 words
9 . The thrombectomy catheter of claim 8 , wherein the local pitch increases toward the proximal and distal portions sufficiently to inhibit excessive separation between adjacent struts when the outer shearing member flexes axially.
Claim 11
Dependent Claim
31 words
10 . The thrombectomy catheter of claim 9 , wherein the struts have protrusions which inhibit sliding of clot material axially between cooperating edges of the inner and outer shearing bodies.
Claim 12
Dependent Claim
35 words
11 . The thrombectomy catheter of claim 1 , wherein at least one expansion actuator extends proximally from the shearing members so that the inner and outer shearing members can be radially expanded in situ.
Claim 13
Dependent Claim
26 words
12 . The thrombectomy catheter of claim 11 , wherein axial translation of an expansion actuator selectively radially expands the inner and outer shearing members concurrently.
Claim 14
Dependent Claim
20 words
13 . The thrombectomy catheter of claim 1 , further comprising a distally oriented clot penetrator adjacent the distal end.
Claim 15
Dependent Claim
48 words
14 . The thrombectomy catheter of claim 13 , wherein the occlusion penetrator comprises at least one end cutter that rotates with the inner shearing member and is exposed distally of the outer shearing member to advance the shearing members within a body lumen distally through clot material.
Claim 16
Dependent Claim
35 words
15 . The thrombectomy catheter of claim 13 , wherein the occlusion penetrator comprises a shaft extendable distally of the shearing members, the shaft axially cycleable through clot material without penetrating through a vessel wall.
Claim 17
Dependent Claim
21 words
16 . The thrombectomy catheter of claim 1 , further comprising an intravascular ultrasound sensor to measure of clot for removal.
Claim 18
Dependent Claim
129 words
17 . A thrombectomy catheter comprising: a flexible tubular body having a proximal end and a distal end; a flexible drive shaft rotatably disposed within the tubular body; an outer shearing member attached near the distal end of the tubular body, the outer member having a circumferential series of independent outer struts, the outer struts having inner surfaces; an inner shearing member rotationally driven by the drive shaft within the outer member, the inner member having a circumferential series of independent inner struts, the inner struts having outer surfaces which slide across the inner surfaces of the outer struts so as to shear clot material when the inner shearing member rotates, at least one member of the group comprising the inner struts and the outer struts being helically oriented.
Claim 19
Dependent Claim
129 words
17 . A thrombectomy catheter comprising: a flexible tubular body having a proximal end and a distal end; a flexible drive shaft rotatably disposed within the tubular body; an outer shearing member attached near the distal end of the tubular body, the outer member having a circumferential series of independent outer struts, the outer struts having inner surfaces; an inner shearing member rotationally driven by the drive shaft within the outer member, the inner member having a circumferential series of independent inner struts, the inner struts having outer surfaces which slide across the inner surfaces of the outer struts so as to shear clot material when the inner shearing member rotates, at least one member of the group comprising the inner struts and the outer struts being helically oriented.
Claim 20
Dependent Claim
20 words
18 . The thrombectomy catheter of claim 17 , wherein the outer shearing member has an embolic debris capture coating.
Claim 21
Dependent Claim
52 words
19 . The thrombectomy catheter of claim 17 , wherein the inner and outer shearing members each have proximal portions and distal portions, the struts of each shearing member affixed together at the proximal and distal portions and extending independently therebetween so that the shearing members flex axially primarily along the struts.
Claim 22
Dependent Claim
29 words
20 . The thrombectomy catheter of claim 17 , further comprising a proximal housing coupled to the tubular body, the housing having a motor drivingly engaging the drive shaft.
Claim 23
Dependent Claim
72 words
21 . The thrombectomy catheter of claim 20 , wherein the drive shaft engages the distal portion of the inner shearing member, wherein the drive shaft is axially translatable relative to the outer tubular member from adjacent the proximal housing, and wherein an axial bearing surfaces of the outer and inner shearing members cooperate to effect concurrent radial expansion of the inner and outer shearing members when the drive shaft translates axially.
Claim 24
Dependent Claim
96 words
22 . A method for forming a thrombectomy catheter, the method comprising: providing a first tube having a proximal end and a distal end with a central region therebetween, the tube comprising a tube material; cutting axially along the central region of the first tube so as to define a circumferential series of independent struts, the struts comprising the tube material; positioning the first cage coaxially with a second resiliently deformable cage; and attaching a drive for rotating at least one of the cages within a blood vessel for shearing of obstructive material between the cages.
Claim 25
Dependent Claim
96 words
22 . A method for forming a thrombectomy catheter, the method comprising: providing a first tube having a proximal end and a distal end with a central region therebetween, the tube comprising a tube material; cutting axially along the central region of the first tube so as to define a circumferential series of independent struts, the struts comprising the tube material; positioning the first cage coaxially with a second resiliently deformable cage; and attaching a drive for rotating at least one of the cages within a blood vessel for shearing of obstructive material between the cages.
Claim 26
Dependent Claim
83 words
23 . A method for removing clot material from a blood vessel of a patient, the method comprising: introducing a distal portion of a catheter into the blood vessel; positioning the distal portion of the catheter adjacent the clot material from outside the patient by manipulating a flexible body of the catheter; radially expanding inner and outer shearing members of the catheter within the blood vessel; and rotating the inner shearing member within the outer shearing member to shear the clot material therebetween.
Claim 27
Dependent Claim
83 words
23 . A method for removing clot material from a blood vessel of a patient, the method comprising: introducing a distal portion of a catheter into the blood vessel; positioning the distal portion of the catheter adjacent the clot material from outside the patient by manipulating a flexible body of the catheter; radially expanding inner and outer shearing members of the catheter within the blood vessel; and rotating the inner shearing member within the outer shearing member to shear the clot material therebetween.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.