Aspiration catheter system

Patent metadata

Field	Value
Publication number	US-11452841-B2
Application number	US-201916381642-A
Country	US
Kind code	B2
Filing date	Apr 11, 2019
Priority date	Apr 11, 2019
Publication date	Sep 27, 2022
Grant date	Sep 27, 2022

Abstract

In some examples, an aspiration catheter system includes an outer catheter and an inner catheter configured to be positioned within the outer catheter lumen, and an alignment element. The outer catheter defines an outer catheter lumen and an outer catheter distal opening. The inner catheter defines an inner catheter lumen, an inner catheter distal opening, and a plurality of sidewall openings proximal to the inner catheter distal opening. The alignment element is configured to indicate a predetermined position of the inner catheter relative to the outer catheter when the inner catheter is received within the outer catheter distal opening. When the inner catheter is at the predetermined position, at least one sidewall opening of the plurality of sidewall openings remains positioned within the outer catheter lumen and at least one other sidewall opening of the plurality of sidewall openings is positioned distal to the outer catheter distal opening.

First claim

What is claimed is:

1. An aspiration catheter system comprising:
an outer catheter configured to be navigated within vasculature of a patient from an entry site to a target site, the outer catheter defining an outer catheter lumen, and an outer catheter distal opening;
an inner catheter configured to be positioned within the outer catheter lumen, the inner catheter defining an inner catheter lumen, an inner catheter distal opening, and a plurality of sidewall openings proximal to the inner catheter distal opening; and
an alignment element configured to indicate a predetermined position of the inner catheter relative to the outer catheter when the inner catheter is received within the outer catheter lumen,
wherein when the inner catheter is at the predetermined position, at least one sidewall opening of the plurality of sidewall openings remains positioned within the outer catheter lumen and at least one other sidewall opening of the plurality of sidewall openings is positioned distal to the outer catheter distal opening, and
wherein the outer catheter is configured to fluidically couple the outer catheter lumen to a fluid circulation system.

2. The aspiration catheter system of claim 1 , wherein the alignment element comprises a visible marker on the inner catheter.

3. The aspiration catheter system of claim 1 , wherein the alignment element comprises an alignment structure extending from the inner catheter and configured to engage with a proximal end of the outer catheter.

4. The aspiration catheter system of claim 1 , wherein the alignment element comprises a plurality of markers, each marker corresponding to a predetermined position of at least one sidewall opening of the plurality of sidewall openings of the inner catheter relative to the outer catheter distal opening.

5. The aspiration catheter system of claim 1 , wherein an inner circumference of the outer catheter is between about 50 microns and about 200 microns greater than an outer circumference of the inner catheter.

6. The aspiration catheter system of claim 1 , wherein at least one sidewall opening of the plurality of sidewall openings comprises a one-way valve configured to permit flow of fluid into the inner catheter lumen.

7. The aspiration catheter system of claim 6 , wherein the one-way valve is configured to open in response to a differential pressure between the outer catheter lumen and the inner catheter lumen being greater than or equal to a predetermined threshold value.

8. The aspiration catheter system of claim 6 , wherein the one-way valve comprises a duckbill valve, a slit valve, or a flexible flap positioned at the respective sidewall openings.

9. The aspiration catheter system of claim 1 , wherein the distal-most sidewall opening of the plurality of sidewall openings is positioned between about 0.5 centimeters and about 10 centimeters proximal to the inner catheter distal opening.

10. The aspiration catheter system of claim 1 , further comprising:
the fluid circulation system coupled to a proximal portion of the outer catheter and a proximal portion of the inner catheter,
wherein the fluid circulation system is configured to deliver fluid through the outer catheter lumen and receive fluid through the inner catheter lumen.

11. The aspiration catheter system of claim 1 , wherein the sidewall openings of the plurality of sidewall openings are circumferentially distributed around an outer perimeter of the inner catheter.

12. The aspiration catheter system of claim 1 , wherein the sidewall openings of the plurality of sidewall openings are distributed axially along the inner catheter.

13. The aspiration catheter system of claim 1 ,
wherein the outer catheter defines an outer catheter proximal opening,
wherein the inner catheter defines an inner catheter proximal opening, and
wherein, when the inner catheter is at the predetermined position:
the outer catheter proximal opening is configured to receive aspiration fluid into the outer catheter lumen between the outer catheter and the inner catheter, and
the inner catheter proximal opening is configured to discharge aspiration fluid from the inner catheter lumen.

14. The aspiration catheter system of claim 1 , wherein the outer catheter is configured to be navigated within cranial vasculature of the patient.

15. A method, comprising:
introducing at least a portion of an outer catheter and an inner catheter of an aspiration catheter system into vasculature of a patient, the aspiration catheter system comprising:
the outer catheter defining an outer catheter lumen and an outer catheter distal opening;
the inner catheter defining an inner catheter lumen, an inner catheter distal opening, and a plurality of sidewall openings proximal to the inner catheter distal opening; and
an alignment element configured to indicate a predetermined position of the inner catheter relative to the outer catheter when the inner catheter is received within the outer catheter distal opening;

positioning the inner catheter within the outer catheter lumen at the predetermined position such that at least one sidewall opening of the plurality of sidewall openings remains positioned within the outer catheter lumen and at least one other sidewall opening of the plurality of sidewall openings is positioned distal to the outer catheter distal opening; and
delivering a fluid through the outer catheter lumen and through at least one of:
the outer catheter distal opening into the vasculature of the patient, or
at least one sidewall opening of the plurality of sidewall openings into the inner catheter lumen.

16. The method of claim 15 , wherein the fluid is delivered through the outer catheter lumen through the at least one sidewall opening into the inner catheter lumen in response to a differential pressure between the outer catheter lumen and the inner catheter lumen being greater than or equal to a predetermined threshold value.

17. The method of claim 15 , further comprising:
positioning the inner catheter distal opening proximate to a soft tissue in the vasculature; and
generating a suction in the inner catheter lumen.

18. The method of claim 17 ,
wherein the inner catheter distal opening is positioned in the vasculature so that the soft tissue substantially covers the inner catheter distal opening, and
wherein the fluid is delivered through the at least one sidewall opening in response to the soft tissue substantially covering the inner catheter distal opening.

19. The method of claim 15 , wherein the alignment element comprises an alignment structure extending from the inner catheter and configured to engage with a proximal end of the outer catheter.

20. The method of claim 15 , wherein the alignment element comprises a plurality of markings, each marking corresponding to a predetermined position of at least one sidewall opening of the plurality of sidewall openings of the inner catheter relative to the outer catheter distal opening.

21. An aspiration catheter system comprising:
an outer catheter configured to be navigated within vasculature of a patient from an entry site to a target site, the outer catheter defining an outer catheter lumen and an outer catheter distal opening;
an inner catheter configured to be positioned within the outer catheter lumen, the inner catheter defining an inner catheter lumen, an inner catheter distal opening, and a plurality of sidewall openings proximal to the inner catheter distal opening; and
an alignment element configured to indicate a

Assignees

• Covidien Lp

Inventors

• Jalgaonkar Ujwal
• Bon Edwin
• Skujins Peter
• Mintz Eric

Classifications

• A61M1/84

  Drainage tubes; Aspiration tips (for negative pressure wound therapy A61M1/90; for surgical cutting instruments A61B17/32) · CPC title

• A61B2217/005

  with suction drainage system · CPC title

• A61M2025/0004

  having two or more concentrically arranged tubes for forming a concentric catheter system · CPC title

• A61B17/22

  Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for · CPC title

• A61M25/00

  Catheters; Hollow probes (dilators A61M29/00; {peritoneal catheters A61M1/285; tracheal tubes A61M16/04; for drainage A61M27/00; for uterus, vagina or rectum A61M31/00} ; for measuring or testing A61B; {materials for catheters A61L29/00}) · CPC title