MEDICAL DEVICE INCLUDING STRUCTURE FOR CROSSING AN OCCLUSION IN A VESSEL

• US 20080147170A1
• Filed: 12/15/2006
• Published: 06/19/2008
• Est. Priority Date: 12/15/2006
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Inventors: VRBA, ANTHONY C.
• Granted Patent: US 8,556,914 B2
• Time in Patent Office: Days
• US Class Current: 623/1.22
• CPC Class Codes: A61B 17/320758 with a rotating cutting instrument, e.g. motor driven A61B17/320725, A61B17/32075 and A61B17/320783 take precedence; for removing intra-ocular material A61F9/00763; endoscopic rotatable cutting instruments A61B17/32002
• CPC Class Codes: A61B 2017/22042 Details of the tip of the guide wire
• CPC Class Codes: A61B 2017/22044 with a pointed tip
• CPC Class Codes: A61B 2017/22094 for crossing total occlusions, i.e. piercing
• CPC Class Codes: A61M 2025/09133 having specific material compositions or coatings; Materials with specific mechanical behaviours, e.g. stiffness, strength to transmit torque
• CPC Class Codes: A61M 2025/0915 having features for changing the stiffness
• CPC Class Codes: A61M 2025/09175 having specific characteristics at the distal tip
• CPC Class Codes: A61M 25/00 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 Class Codes: A61M 25/0068 Static characteristics of the catheter tip, e.g. shape, atraumatic tip, curved tip or tip structure
• CPC Class Codes: A61M 25/008 Strength or flexibility characteristics of the catheter tip
• CPC Class Codes: A61M 25/09 Guide wires

Abstract

An medical device, such as a guidewire, catheter, or the like, that includes an elongated tubular member that includes a plurality of angled slots defined in at least a distal section thereof. The plurality of angled slots can form a generally spiral shaped pattern about the longitudinal axis of the tubular member, and can be useful, for example, in aiding a user of the device in crossing an occlusion in a vessel of a patient. In some embodiments, the distal section of the tubular member may have an outer diameter that is greater than the outer diameter of a proximal section of the tubular member. In some embodiments, a proximal section of the tubular member may include a plurality of slots defined therein, for example, that may be configured to increase the lateral flexibility of the tubular member.

Claims

1. A medical guidewire comprising:

an elongated tubular member extending along a longitudinal axis and defining an inner lumen and having an outer surface, the tubular member including a proximal section, a distal section, a proximal end, and a distal end;

the distal section including a plurality of angled slots defined therein that form a generally spiral shaped pattern about the longitudinal axis, the distal section having an outer diameter; and

the proximal section having an outer diameter that is less than the outer diameter of the distal section.

2. The guidewire of claim 1, wherein the tubular member includes two or more separate tubular components that are attached together to form the tubular member.

3. The guidewire of claim 1, wherein the proximal section is a first discrete tubular component and the distal section is a second discrete tubular component, and the first and second discrete tubular components are attached together to form the tubular member.

4. The guidewire of claim 1, wherein the proximal section and the distal section of the tubular member are of monolithic construction.

5. The guidewire of claim 1, wherein the proximal section includes a plurality of slots defined in at least a portion thereof.

6. The guidewire of claim 5, wherein the plurality of slots defined in the proximal section are disposed at an angle relative to the longitudinal axis that is different from the angle of the slots in the distal section.

7. The guidewire of claim 6, wherein the plurality of slots defined in the proximal section are disposed at an angle that is generally perpendicular to the longitudinal axis.

8. The guidewire of claim 1, wherein at least some of the angled slots are disposed adjacent the distal end of the tubular member.

9. The guidewire of claim 1, wherein each of the slots includes a center line that extends both laterally along and radially about the longitudinal axis such that the slots make less than one full revolution about the longitudinal axis.

10. The guidewire of claim 1, wherein the distal section comprises a first material, and the proximal section comprises a second material different from the first material.

11. The guidewire of claim 1, wherein the distal section and the proximal section are made of the same material.

12. The guidewire of claim 1, wherein the tubular member comprises a metallic material.

13. The guidewire of claim 1, wherein the tubular member comprises a super-elastic material.

14. The guidewire of claim 1, wherein the tubular member comprises a nickel-titanium alloy.

15. The guidewire of claim 1, wherein the tubular member comprises a linear elastic nickel-titanium alloy.

16. The guidewire of claim 1, wherein the tubular member comprises a super-elastic nickel-titanium alloy.

17. The guidewire of claim 1, further including a core wire attached to the tubular member, the core wire including a distal section and a proximal section, wherein at least a portion of the distal section of the core wire is disposed within the lumen of the tubular member.

18. A medical guidewire comprising:

an elongated tubular member extending along a longitudinal axis and defining an inner lumen and having an outer surface, the tubular member including a proximal section, a distal section, a proximal end, and a distal end;

a plurality of first slots defined in at least a portion of the distal section of the tubular member, the first slots being disposed at an angle relative to the longitudinal axis such that the slots form a generally spiral shaped pattern about the longitudinal axis; and

a plurality of second slots defined in at least a portion of the proximal section of the tubular member that are configured to increase the lateral flexibility of the tubular member, the second slots being disposed at an angle relative to the longitudinal axis that is different from the angle of the first slots.

19. The guidewire of claim 18, wherein the first slots are disposed at an angle in the range of about 35 to 85 degrees relative to the longitudinal axis.

20. The guidewire of claim 18, wherein the angle of the second slots is generally perpendicular to the longitudinal axis.

21. The guidewire of claim 18, wherein the tubular member includes two or more discrete tubular components that are attached together to form the tubular member.

22. The guidewire of claim 18, wherein the proximal section and the distal section of the tubular member are of monolithic construction.

23. The guidewire of claim 18, wherein the tubular member comprises a metallic material.

24. The guidewire of claim 18, wherein the tubular member comprises a nickel-titanium alloy.

25. The guidewire of claim 18, wherein the tubular member comprises a linear elastic nickel-titanium alloy.

26. The guidewire of claim 18, wherein the distal section has an outer diameter, and the proximal section has an outer diameter that is less than the outer diameter of the distal section.

27. The guidewire of claim 18, further including a core wire attached to the tubular member, the core wire including a distal section and a proximal section, wherein at least a portion of the distal section of the core wire is disposed within the lumen of the tubular member.

28. The guidewire of claim 18, wherein at least some of the first slots are aligned to form a non-continuous spiral groove that extends radially about the outer surface of the distal section of the tubular member.

29. The guidewire of claim 18, wherein each of the first slots includes a center line that extends both laterally along and radially about the longitudinal axis.

30. A guidewire for crossing an occlusion in a vessel lumen of a patient, the guidewire comprising:

an elongated tubular member extending along a longitudinal axis and defining an inner lumen and having an outer surface, the tubular member including a proximal section, a distal section, a proximal end, and a distal end, at least a portion of the tubular member including a plurality of slots defined therein that are configured to increase the lateral flexibility of the tubular member; and

means for engaging the occlusion and pulling at least a portion of the guide wire through the occlusion when a predetermined twisting motion is applied to the guidewire.

31. A method of making a guidewire, the method comprising:

providing an elongated tubular member that extends along a longitudinal axis, defines an inner lumen, has an outer surface, includes a proximal section, a distal section, a proximal end, and a distal end, wherein the distal section has an outer diameter, and the proximal section has an outer diameter that is less than the outer diameter of the distal section; and

creating a plurality of angled slots in the distal section such that the angled slots form a generally spiral shaped pattern about the longitudinal axis.

32. The method of claim 31, wherein providing the tubular member includes providing a first and a second discrete tubular component, and attaching the first and second discrete tubular components together to form the tubular member.

33. The method of claim 31, further including creating a plurality of slots in at least a portion of the proximal section.

34. A method of making a guidewire, the method comprising:

providing an elongated tubular member that extends along a longitudinal axis and defines an inner lumen and has an outer surface, the tubular member including a proximal section, a distal section, a proximal end, and a distal end;

creating a plurality of first slots in at least a portion of the distal section of the tubular member, the first slots being created such that they are disposed at an angle relative to the longitudinal axis and form a generally spiral shaped pattern about the longitudinal axis; and

creating a plurality of second slots in at least a portion of the proximal section of the tubular member that are configured to increase the lateral flexibility of the tubular member, the second slots being created such that they are disposed at an angle relative to the longitudinal axis that is different from the angle of the first slots.

35. The method of claim 34, wherein the second slots are created at an angle that is generally perpendicular to the longitudinal axis.

36. A method for crossing an occlusion in a vessel lumen of a patient, the method comprising:

providing a medical device including an elongated tubular member extending along a longitudinal axis and defining an inner lumen and having an outer surface, the tubular member including a proximal section, a distal section, a proximal end, and a distal end, the distal section including a plurality of angled slots defined therein that form a generally spiral shaped pattern about the longitudinal axis, the spiral shaped pattern defined by the slots generally defining one or more generally spiral shaped structure remaining as a part of the distal section of the tubular member, the distal section having an outer diameter that is greater than an outer diameter of the proximal section;

inserting the medical device into the vessel;

navigating the medical device to the occlusion such that the distal end of the tubular member engages the occlusion; and

applying a rotational force to the medical device such that the one or more spiral shaped structure or angled slots engages the occlusion and pulls at least a portion of the medical device through the occlusion.

37. A method for crossing an occlusion in a vessel lumen of a patient, the method comprising:

providing a medical device including an elongated tubular member extending along a longitudinal axis and defining an inner lumen and having an outer surface, the tubular member including a proximal section, a distal section, a proximal end, and a distal end, the distal section including a plurality of angled slots defined therein that form a generally spiral shaped pattern about the longitudinal axis, the spiral shaped pattern defined by the slots generally defining one or more generally spiral shaped structure remaining as a part of the distal section of the tubular member, the proximal section including a plurality of second slots defined therein that are configured to increase the lateral flexibility of the tubular member, the second slots being disposed at an angle relative to the longitudinal axis that is different from the angled slots;

inserting the medical device into the vessel;

navigating the medical device to the occlusion such that the distal end of the tubular member engages the occlusion; and

applying a rotational force to the medical device such that the one or more spiral shaped structure or angled slots engages the occlusion and pulls at least a portion of the medical device through the occlusion.