Balloon catheter having hydraulic actuator

Patent metadata

Field	Value
Publication number	US-10531971-B2
Application number	US-201314767968-A
Country	US
Kind code	B2
Filing date	Nov 11, 2013
Priority date	Mar 12, 2013
Publication date	Jan 14, 2020
Grant date	Jan 14, 2020

Abstract

Catheter including an inner tubular member, an outer tubular member movable relative to the inner tubular member, and an expandable member coupled to the distal end portion of the inner tubular member. The expandable member having an inner chamber and transitionable between a deflated configuration and an inflated configuration. A pressure chamber is defined by the proximal seal, the distal seal, the exterior surface of the inner tubular member and interior surface of the outer tubular member, with the pressure chamber in fluid communication with a fluid flow port, wherein fluid introduced through the fluid flow port and into the pressure chamber applies a force on the proximal seal to urge the outer tubular member in a proximal direction.

First claim

What is claimed is:

1. A catheter comprising:
an inner tubular member having a proximal end portion, a distal end portion and an exterior surface, the inner tubular member further having a fluid lumen defined therein, the fluid lumen having a fluid flow port defined by the exterior surface along the distal end portion of the inner tubular member, the fluid lumen further including a directional control valve fluidly coupled with the fluid flow port, the directional control valve having a first position and a second position;
an outer tubular member movable relative to the inner tubular member, the outer tubular member having a proximal end, a distal end and an interior surface directed toward the exterior surface of the inner tubular member;
an expandable member coupled to the distal end portion of the inner tubular member and having an inner chamber in fluid communication with the fluid lumen, the expandable member transitionable between a deflated configuration and an inflated configuration;
a proximal seal extending from the interior surface of the outer tubular member toward the exterior surface of the inner tubular member, the proximal seal located proximal to the fluid flow port;
a distal seal extending from the exterior surface of the inner tubular member toward the interior surface of the outer tubular member, the distal seal located distal to the fluid flow port; and
a pressure chamber defined by the proximal seal, the distal seal, the exterior surface of the inner tubular member and interior surface of the outer tubular member, with the pressure chamber in fluid communication with the fluid flow port, wherein the directional control valve in the first position directs fluid through the fluid flow port into the pressure chamber to apply a force on the proximal seal to urge the outer tubular member in a proximal direction and wherein the directional control valve in the second position subsequent to the outer tubular member being urged in the proximal direction directs fluid through the fluid lumen into the inner chamber of the expandable member to inflate the expandable member to the inflated configuration.

2. The catheter according to claim 1 , wherein the inner tubular member further includes a guidewire lumen defined therein.

3. The catheter according to claim 2 , wherein the guidewire lumen is defined by a guidewire tube disposed within the fluid lumen.

4. The catheter according to claim 1 , wherein the inner tubular member further comprises a strengthening member disposed along a length corresponding to the pressure chamber.

5. The catheter according to claim 1 , further comprising a marker secured to the inner tubular member to seal a distal end of the fluid lumen distal of the fluid flow port.

6. The catheter according to claim 1 , wherein the fluid lumen is configured to receive a guidewire, the fluid lumen further comprising proximal and distal guidewire seals to seal around a guidewire disposed therethrough.

7. The catheter according to claim 1 , wherein the distal end of the outer tubular member further comprises a marker.

8. The catheter according to claim 1 , further comprising a proximal stopper disposed proximal to the pressure chamber, wherein the outer tubular member is movable in a proximal direction up to engagement of the proximal stopper.

9. The catheter according to claim 8 , wherein the proximal stopper inhibits movement of the outer tubular member in the proximal direction.

10. The catheter according to claim 8 , further comprising a proximal adapter, wherein the proximal stopper is disposed distal to the proximal adapter.

11. The catheter according to claim 1 , wherein the expandable member further defines a working length thereof and includes a proximal portion proximal to the working length, the proximal portion remaining with the outer tubular member when positioned in a retracted position.

12. The catheter according to claim 11 , wherein the expandable member has a folded arrangement in the deflated configuration, the proximal portion remaining at least partially folded within the outer tubular member with an unfolded portion outside the outer tubular member in the inflated configuration, and wherein the proximal portion remaining at least partially folded is configured to facilitate refolding of the unfolded portion when the expandable member is deflated and the outer tubular member is moved distally.

13. The catheter according to claim 12 , wherein a medical device is crimped about the expandable member in the folded arrangement.

14. The catheter according to claim 1 , wherein the expandable member includes a semicompliant material.

15. The catheter according to claim 1 , wherein the expandable member includes compliant material.

16. The catheter according to claim 1 , wherein the expandable member includes a multilayer construction.

17. The catheter according to claim 1 , further comprising a stent disposed on the expandable member having an initial delivery condition and a deployed condition, wherein the stent is transitionable to the deployed condition when the directional control valve in the second position directs fluid into the inner chamber of the expandable member to inflate the expandable member to the inflated configuration.

18. The catheter according to claim 1 , wherein the expandable member further includes a therapeutic agent disposed thereon.

19. The catheter according to claim 1 , further comprising a second expandable member coupled to the distal end portion of the inner tubular member and having a second inner chamber, the second expandable member transitionable between a deflated configuration and an inflated configuration.

20. The catheter according to claim 19 , further comprising a medical device disposed on the second expandable member having an initial delivery condition and a deployed condition, wherein the medical device is transitionable to the deployed condition when fluid introduced into the second inner chamber of the second expandable member inflates the second expandable member to the inflated configuration.

21. The catheter according to claim 19 , further comprising a stent disposed on the expandable member having an initial delivery condition and a deployed condition, wherein the stent is transitionable to the deployed condition when fluid introduced into the inner chamber of the expandable member inflates the expandable member to the inflated configuration, wherein at least one of the medical device and the stent further includes a therapeutic agent disposed thereon.

22. The catheter according to claim 1 , wherein the directional control valve is disposed proximate the fluid flow port.

Assignees

• Abbott Cardiovascular Systems Inc
• Abbott Cardiovascular System Inc

Inventors

• Haarmann-Thiemann Anna Marie

Classifications

• A61F2/9517

  handle assemblies therefor · CPC title

• A61F2/011

  Instruments for their placement or removal · CPC title

• A61F2250/0021

  differing in coefficient of friction · CPC title

• A61F2250/0019

  differing in hardness, e.g. Vickers, Shore, Brinell · CPC title

• A61M2025/1081

  having sheaths or the like for covering the balloon but not forming a permanent part of the balloon, e.g. retractable, dissolvable or tearable sheaths · CPC title