# US 11,305,095 B2 · Microfabricated catheter having an intermediate preferred bending section

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- Number: US 11,305,095 B2
- Document ID: US11305095B2
- Status: Granted
- Kind: B2
- Application number: 16/281,046
- Filed: 2019-02-20
- Published: 2019-08-22
- Granted: 2022-04-19
- Earliest claimed: 2018-02-22
- Assignees: Scientia Vascular, LLC
- Applicants: Scientia Vascular, LLC
- Inventors: Edward J. Snyder; John A. Lippert; Todd H. Turnlund; Clark C. Davis
- Web page: https://patentgrep.com/patent/US11305095B2

## CPC

- A61M 25/0138: {having flexible regions as a result of weakened outer material, e.g. slots, slits, cuts, joints or coils}
- A61M 25/005: {with embedded materials for reinforcement, e.g. wires, coils, braids}
- A61M 25/0051: {made from fenestrated or weakened tubing layer}
- A61M 25/0053: {having a variable stiffness along the longitudinal axis, e.g. by varying the pitch of the coil or braid}
- A61M 25/0054: {with regions for increasing flexibility}
- A61M 25/0012: {with embedded structures, e.g. coils, braids, meshes, strands or radiopaque coils}
- A61M 25/0052: {Localized reinforcement, e.g. where only a specific part of the catheter is reinforced, for rapid exchange guidewire port}
- A61M 25/0144: {having flexible regions as a result of inner reinforcement means, e.g. struts or rods}
- A61M 2025/0188: {having slitted or breakaway lumens}
- A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)}

## Abstract

The present disclosure relates to devices and methods for accessing a targeted vessel, such as a coronary artery, near the aortic root. A catheter device includes a proximal section, an intermediate section, and a distal section. The intermediate section includes a more proximal section (a proximal-intermediate section) and a more distal section (a distal-intermediate section). The proximal-intermediate section is microfabricated to enable preferred bending along a single plane. The distal-intermediate section is more rigid than the proximal-intermediate section and the distal section. In use, the proximal-intermediate section abuts against the aortic wall and bends to allow the distal-intermediate section to extend across the aortic root toward a targeted vessel on the opposite side of the aorta.

## Claims

### Claim 1

An interventional device configured for passage to the aortic root and to a coronary artery, the interventional device comprising:
an elongated member extending between a proximal end and a distal end, the elongated member including:
a proximal section including a microfabricated region and a braided region proximal of the microfabricated region, the microfabricated region of the proximal section having a cut arrangement for increasing flexibility of the proximal section;
a distal section including a microfabricated region having a cut arrangement for increasing flexibility of the distal section, and wherein the microfabricated region of the distal section has greater flexibility than the microfabricated region of the proximal section; and
an intermediate section between the proximal section and the distal section, the intermediate section having a proximal-intermediate section extending distally from the proximal section and a distal-intermediate section extending proximally from the distal section,
wherein the proximal-intermediate section includes a microfabricated cut arrangement with cuts arranged on a single side to leave a resulting spine and to enable preferential flexing in one plane, and
wherein the distal-intermediate section is more rigid than each of the proximal-intermediate section, the microfabricated region of the proximal section, and the distal section.

### Claim 2 (depends on 1)

The device of claim 1, wherein at least the distal section and intermediate section are formed from a single integral piece of stock material.

### Claim 3 (depends on 1)

The device of claim 1, wherein at least the distal section, the intermediate section, and a region of the proximal section are formed from a single integral piece of stock material, the region of the proximal section extending proximally from the intermediate section.

### Claim 4 (depends on 1)

The device of claim 1, wherein longitudinal spacing between cuts of the microfabricated region of the proximal section grows progressively narrower toward the intermediate section.

### Claim 5 (depends on 1)

The device of claim 1, further comprising an outer laminate.

### Claim 6 (depends on 5)

The device of claim 5, wherein the outer laminate extends distally beyond the distal section to form an atraumatic distal tip.

### Claim 7 (depends on 1)

The device of claim 1, further comprising an inner liner.

### Claim 8 (depends on 7)

The device of claim 7, wherein the inner liner extends distally beyond the distal section to form an atraumatic distal tip.

### Claim 9 (depends on 1)

The device of claim 1, wherein the distal-intermediate section omits cuts.

### Claim 10 (depends on 1)

The device of claim 1, wherein cuts of the microfabricated region of the proximal section are arranged on multiple sides of the proximal section.

### Claim 11 (depends on 1)

The device of claim 1, wherein cuts of the microfabricated region of the distal section are arranged on multiple sides of the distal section.

### Claim 12

A method of accessing a targeted vessel via the aortic root, the method comprising:
providing an interventional device comprising:
an elongated member extending between a proximal end and a distal end, the elongated member including a proximal section having a microfabricated region with a first cut arrangement with cuts arranged on multiple sides, a distal section having a microfabricated region with a second cut arrangement with cuts arranged on multiple sides and that provides greater flexibility than the first cut arrangement, and
an intermediate section between the proximal section and the distal section and that has a proximal-intermediate section extending distally from the proximal section and a distal-intermediate section extending proximally from the distal section,
wherein the proximal-intermediate section includes a microfabricated cut arrangement with cuts arranged on a single side to leave a resulting spine and to enable preferential flexing in one plane, and
wherein the distal-intermediate section omits microfabricated cuts and is more rigid than the proximal-intermediate section and the distal section;
routing the distal end of the interventional device to the aortic root; and
positioning the device such that the proximal-intermediate section abuts an aortic wall at a contact point and forms a bend, and such that the distal-intermediate section extends across the aortic root away from the contact point and towards a targeted vessel to enable the distal section entry into the targeted vessel.

### Claim 13 (depends on 12)

The method of claim 12, wherein the targeted vessel is a coronary artery.

### Claim 14 (depends on 12)

The method of claim 12, wherein the distal-intermediate section of the interventional device is more rigid than the microfabricated region of the proximal section.

### Claim 15 (depends on 12)

The method of claim 12, wherein the proximal section of the interventional device further comprises a braided region.

### Claim 16 (depends on 15)

The method of claim 15, wherein the braided region of the proximal section is proximal of the microfabricated region of the proximal section.

### Claim 17 (depends on 12)

The method of claim 12, wherein at least the distal section and intermediate section of the interventional device are formed from a single integral piece of stock material.

### Claim 18 (depends on 12)

The method of claim 12, wherein longitudinal spacing between cuts of the microfabricated region of the proximal section grows progressively narrower toward the intermediate section.

### Claim 19 (depends on 12)

The method of claim 12, further comprising an outer laminate and/or inner liner.

### Claim 20 (depends on 19)

The method of claim 19, wherein the outer laminate and/or inner liner extends distally beyond the distal section to form an atraumatic distal tip.