Recovery catheter apparatus and method

• US 20060190024A1
• Filed: 02/24/2005
• Published: 08/24/2006
• Est. Priority Date: 02/24/2005
• Status: Abandoned Application

• Current Assignee: EndoVascular Technologies Incorporated (Boston Scientific Corporation), OY Elmomed Limited
• Original Assignee: OY Elmomed Limited
• Inventors: Boyle, William J., Nikanorov, Alexander, Lubas, Joanna, Fung, Gregory W., Bei, Nianjiong
• Application Number:
  US11/066,028
• Publication Number:
  US 20060190024A1
• Time in Patent Office: Days
• US Class Current: 606/200
• CPC Class Codes: A61F 2/011 Instruments for their placement or removal
• CPC Class Codes: A61F 2230/0006 circular
• CPC Class Codes: A61F 2250/0019 differing in hardness, e.g. Vickers, Shore, Brinell
• CPC Class Codes: A61M 2025/0046 Coatings for improving slidability
• CPC Class Codes: A61M 2025/0063 having means, e.g. stylets, mandrils, rods or wires to reinforce or adjust temporarily the stiffness, column strength or pushability of catheters which are already inserted into the human body
• CPC Class Codes: A61M 2025/0183 Rapid exchange or monorail catheters
• CPC Class Codes: A61M 2025/09008 having a balloon
• CPC Class Codes: A61M 2025/1015 having two or more independently movable balloons where the distance between the balloons can be adjusted, e.g. two balloon catheters concentric to each other forming an adjustable multiple balloon catheter system
• CPC Class Codes: A61M 25/0045 multi-layered, e.g. coated coating materials A61L29/08
• CPC Class Codes: A61M 25/0054 with regions for increasing flexibility
• 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 25/007 Side holes, e.g. their profiles or arrangements; Provisions to keep side holes unblocked
• CPC Class Codes: A61M 25/008 Strength or flexibility characteristics of the catheter tip
• CPC Class Codes: A61M 25/0108 using radio-opaque or ultrasound markers
• CPC Class Codes: A61M 25/09 Guide wires
• CPC Class Codes: A61M 25/104 used for angioplasty

Abstract

A catheter assembly configured for retrieval of medical devices from vasculature. The catheter includes an outer catheter and an inner catheter. The inner and/or outer catheter can include a tapered terminal end portion. A mandrel can be provided to facilitate advancement of the assembly within vasculature.

Claims

1. A system for use in vasculature, comprising:

a filter device connected to an elongate member; and

a recovery catheter, the recovery catheter including an outer catheter and an inner catheter slideably received in the outer catheter, the outer catheter including a superior end portion sized to receive the filter, and the inner catheter including a lumen that receives the elongate member and a terminal end portion forming a tapered tip.

2. The system of claim 1, wherein the inner catheter is longitudinally adjustable with respect to the outer catheter.

3. The system of claim 1, wherein the inner catheter is longitudinally adjustable with respect to the elongate member.

4. The system of claim 1, wherein the inner catheter lumen is configured to center the elongate member within the outer catheter.

5. The system of claim 1, further comprising an opening formed in a sidewall of the outer catheter through which the elongate member is routed.

6. The system of claim 1, further comprising a lateral access formed in the inner catheter and in communication with the inner catheter lumen.

7. The system of claim 1, wherein the superior end portion of the inner catheter further includes a tubular member extending inferiorly from the tapered tip, the tubular member and tapered tip being sized to be received entirely within an outer catheter superior portion.

8. The system of claim 7, further comprising a positioning wire attached to the inner catheter tubular member, the positioning wire extending inferiorly from the outer catheter.

9. The system of claim 1, further comprising a support mandrel extending along the recovery catheter.

10. The system of claim 9, wherein the support mandrel has a tapered profile.

11. The system of claim 10, wherein the tapered mandrel is covered with a necked extrusion material.

12. The system of claim 1, wherein the outer catheter is tapered to provide an outer catheter superior portion within an increased diameter.

13. The system of claim 1, wherein the outer catheter includes a terminal end portion defining a tapered tip.

14. The system of claim 13, wherein the tapered tip is elastic so that it is expandable upon receiving a filter device.

15. The system of claim 14, wherein a wall thickness of the outer catheter tapered tip is greater than a wall thickness of a section of the outer catheter adjacent and inferior to the tapered tip.

16. The system of claim 14, wherein a wall thickness of the outer catheter tapered tip is less than or equal to a wall thickness of a section of the outer catheter adjacent and inferior to the tapered tip.

17. The system of claim 1, wherein one or more of the inner and outer catheters are supported by a braided structure.

18. The system of claim 1, wherein the opening formed in a sidewall of the outer catheter is provided with a diaphragm seal.

19. The system of claim 1, further comprising a plurality of radiopaque markers attached to the outer catheter.

20. The system of claim 1, further comprising a lubricious coating on the elongate member.

21. The system of claim 1, further comprising a fitting attached to an inferior terminal end of the recovery catheter, the fitting being configured to facilitate aspiration of material collected by the filter.

22. A system for use in vasculature, comprising:

a filter device connected to an elongate member; and

a recovery catheter, the recovery catheter including an elongate tubular member configured to receive the filter device and a mandrel extending along the tubular member, the mandrel having a variable durometer along its length.

23. A system for use in vasculature, comprising:

a filter device connected to an elongate member; and

a recovery catheter, the recovery catheter including a first section having four layers of material and a second section with two layers of material.