IP Library › Granted Patent US 12,296,112
Granted Patent B2
US 12,296,112 · App. 17/493,265 · Granted May 13, 2025

Microfabricated catheter devices with high axial strength

Inventor: Clark C. Davis (Holladay, UT)
Assignee: Scientia Vascular, Inc.
A61M25/0045A61M25/0053A61M25/001A61M25/0013A61M25/0021A61M25/0023A61M25/0026A61M2025/0042A61M25/005A61M25/0054A61M25/0108A61M25/0138A61M25/0147A61M25/09A61M2025/09108A61M2025/0915A61M25/104
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Quick Facts
Patent No.
US 12,296,112
App. No.
17/493,265
Granted
May 13, 2025
Kind
B2
Abstract

This disclosure describes microfabricated intravascular devices that are configured for high axial strength while also maintaining effective bending flexibility. A tube member includes a series of circumferentially extending rings connected to one another by a series of axially extending beams. Transverse cuts separate and define the rings. A series of axial cuts are aligned with the beams and extend from the beams partially into the adjoining rings so that the beam length is nested partially within the axial length of the adjoining rings. This increases the functional length of the beams to provide bending flexibility while still sufficient ring structure to provide effective axial stiffness.

Claims (38)

1. A microfabricated, elongate tube member for an intravascular device, the elongate tube member extending along a longitudinal axis and comprising:

a plurality of circumferentially extending rings, each ring having an axial length;

a plurality of transverse cuts each positioned between adjacent rings, each transverse cut extending in a direction transverse to the longitudinal axis of the tube member;

a plurality of axially extending beams each extending from one ring to another to connect adjacent rings; and

a plurality of wedge-shaped axial cuts, the plurality of wedge-shaped axial cuts including

(i) proximal cuts that, for each beam, begin at an edge of an adjoining proximal ring and extend partially into the adjoining proximal ring in a substantially proximal axial direction so that the beam is at least partially nested within the length of the adjoining proximal ring, wherein each proximal cut is widest where it begins at the edge of the adjoining proximal ring and progressively narrows while extending along the proximal axial direction into the adjoining proximal ring, and

(ii) distal cuts that, for each beam, begin at an edge of an adjoining distal ring and extend partially into the adjoining distal ring in a substantially distal axial direction so that the beam is at least partially nested within the length of the adjoining distal ring, wherein each distal cut is widest where it begins at the edge of the adjoining distal ring and progressively narrows while extending along the distal axial direction into the adjoining distal ring;

wherein the proximal cuts and/or distal cuts of the plurality of wedge-shaped axial cuts extend further into the ring on a first section of the elongate tube member relative to a second section of the elongate tube member;

wherein the first section of the elongate tube member is positioned proximally or distally of the second section; and

wherein the first section of the elongate tube member has a flexibility different than a flexibility of the second section of the elongate tube member.

2. The tube member of claim 1 , wherein at least a portion of the transverse cuts are wedge-shaped.

3. The tube member of claim 2 , wherein at least a portion of the transverse cuts are narrower near the corresponding beams and widen while circumferentially extending away from the corresponding beams.

4. The tube member of claim 1 , wherein the tube member has a two-beam configuration such that there is a pair of beams between each pair of adjacent rings, and the pair of beams between each pair of adjacent rings are circumferentially spaced by about 180 degrees.

5. The tube member of claim 4 , wherein the two-beam configuration includes a rotational offset such that the beams between a given pair of adjacent rings are rotationally offset from beams of a previous and/or subsequent pair of adjacent rings.

6. The tube member of claim 5 , wherein the rotational offset is about 5 degrees to about 90 degrees.

7. The tube member of claim 1 , wherein a ring axial length progressively decreases toward a distal end of the tube member.

8. The tube member of claim 1 , wherein beam thickness progressively decreases toward a distal end of the tube member.

9. The tube member of claim 1 , wherein at a distal section of the tube member, the rings have a ring length to ring diameter ratio of about 0.25 to 0.8.

10. The tube member of claim 1 , wherein at least a section of the tube member has a micromachined-to-homogenous ratio of at least 3.

11. The tube member of claim 1 , wherein the tube member is formed from one or more of polyether ether ketone (PEEK), stainless steel, or nitinol.

12. The tube member of claim 1 , further comprising a polymer applied to the tube member to fill in the transverse cuts and the axial cuts.

13. The tube member of claim 1 , further comprising one or both of an inner liner or an outer liner.

14. The tube member of claim 13 , wherein the one or both of an inner liner or an outer liner do not fill in the transverse cuts or the axial cuts.

15. The tube member of claim 1 , wherein the beam length increases or decreases from a first section of the tube member to a second section of the tube member.

16. The tube member of claim 1 , wherein the beams are arranged so as not to be equally circumferentially spaced.

17. A microfabricated, elongate tube member for an intravascular device, the elongate tube member extending along a longitudinal axis and comprising:

a plurality of circumferentially extending rings, each ring having an axial length;

a plurality of axially extending beams each extending from one ring to another to connect adjacent rings; and

a plurality of wedge-shaped axial cuts, the plurality of wedge-shaped axial cuts including

(i) proximal cuts that, for each beam, begin at an edge of an adjoining proximal ring and extend partially into the adjoining proximal ring in a substantially proximal axial direction so that the beam is at least partially nested within the length of the adjoining proximal ring, wherein each proximal cut is widest where it begins at the edge of the adjoining proximal ring and progressively narrows while extending along the proximal axial direction into the adjoining proximal ring, without widening again, and

(ii) distal cuts that, for each beam, begin at an edge of an adjoining distal ring and extend partially into the adjoining distal ring in a substantially distal axial direction so that the beam is at least partially nested within the length of the adjoining distal ring, wherein each distal cut is widest where it begins at the edge of the adjoining distal ring and progressively narrows while extending along the distal axial direction into the adjoining distal ring without widening again;

wherein the proximal cuts and distal cuts of the plurality of wedge-shaped axial cuts extend further into the ring on a first section of the elongate tube member relative to a second section of the elongate tube member;

wherein the first section of the elongate tube member is positioned distally of the second section;

wherein within the first section and/or the second section the proximal and distal cuts extend to the same respective distance;

wherein the first section of the elongate tube member has a flexibility different than a flexibility of the second section of the elongate tube member, and

wherein any section of elongate tube member distal of the first section does not have proximal and/or distal cuts that extend into a ring to a depth that is less than the depth of the proximal and distal cuts of the first section.

18. The tube member of claim 17 , wherein at least a portion of the wedge-shaped axial cuts form a wedge angle that is greater than 0 degrees and up to approximately 35 degrees.

19. The tube member of claim 18 , wherein the wedge angle increases or decreases along the tube member.

Assignments (2)
CERTIFICATE OF CONVERSION FROM A DELAWARE LLC TO A DELAWARE CORPORATION Recorded May 9, 2022
From: SCIENTIA VASCULAR, LLC
To: SCIENTIA VASCULAR, INC.
Reel/Frame 059912/0135 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 12, 2021
From: DAVIS, CLARK C.
To: SCIENTIA VASCULAR, LLC
Reel/Frame 057762/0514 →
Continuity (2)
Provisional Application 63087410 · Oct 5, 2020
Related Publication 20220105312A1 · Apr 7, 2022
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