Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method of recapturing a stent

a technology of endoluminal devices and stents, applied in the field of endoluminal devices, can solve the problems of catastrophic failure of balloons containing radioactive or cryogenic fluids, balloon failure, etc., and achieve the effect of being ready to withdraw

Inactive Publication Date: 2005-08-25
BARD PERIPHERAL VASCULAR
View PDF61 Cites 49 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The stent provides durable support for vascular areas with malignant growths or restenosis, allowing for the delivery of radioactive, heated, or cryogenic fluids and drugs, maintaining patency and treating affected areas effectively while preventing leakage and ensuring long-term placement.

Problems solved by technology

Among the drawbacks of the prior art coiled balloons is that the balloon material is relatively weak so that expansion and contraction cause the balloon to fail.
Failure of a balloon containing radioactive or cryogenic fluids could be catastrophic.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method of recapturing a stent
  • Method of recapturing a stent
  • Method of recapturing a stent

Examples

Experimental program
Comparison scheme
Effect test

second embodiment

[0036]FIG. 5 depicts the invention. In this embodiment, the hollow stent 60 has only one fluid pathway 66, an inlet without an outlet, and is used to deliver drugs to affected areas. Once the stent 60 is inserted into place and is in its enlarged configuration, drugs are delivered through the catheter to the stent 60. Stent 60 can be constructed in various ways to facilitate the delivery of drugs. In one case, as shown in FIG. 6, the stent 60 is constructed with regions or segments that have pores 64 to allow drug seepage from the tubing 62. Alternatively, continuously porous metal, porous plastic, or a combination of metal and plastic can be used. The perforations 64 or slits in the stent to facilitate drug delivery must be of sufficiently small size to allow the passage of the drug through the entire length of the stent so that all areas can be treated. It will be apparent that pore size can control the rate at which the drug is dispensed. It is possible to cover the pores 64 with...

third embodiment

[0037] the invention, FIG. 7, has a hollow stent 70 containing a single fluid pathway. The tubing 72 can be made of any of the materials discussed above, but in this embodiment, the stent 70 has an inlet path 78 that carries the fluid to the distal end 74 of stent 70 where it then runs through the coils. In this embodiment, a valve 80 connects the stent 70 to catheter 30. FIG. 8 shows a cross-sectional view of valve 80. The pressure from the liquid sent through the catheter causes the gate 82 of valve 80 to open to allow the fluid into the inlet path 78. The pressure that forces the opening of gate 82 causes the simultaneous opening of gate 84, allowing the fluid that is circulated through the stent 70 to exit through pathway 36 of catheter 30. The fluid entering and exiting through catheter 30 must also go through a check ball valve assembly similar to the one shown in FIG. 2. Again, flaps or other “one way” valve mechanisms can be applied. After all incoming fluid has been deliver...

fourth embodiment

[0038] In a fourth embodiment, a hollow coiled stent 90 is formed from polytetrafluoroethylene (PTFE) 92. In FIG. 9, a perspective view of this embodiment can be seen. The stent 90 consists of a support wire 94 over which PTFE 92 is fitted. The pliable structure resulting is then formed into a coiled stent. The PTFE 92 is fitted around the wire 94 so that there is sufficient room to allow the passage of fluid. FIG. 10 shows a cross-sectional view of stent 90, illustrating the pathway 96 created around the support wire 94 to allow the passage of fluid. In this embodiment, stretched expanded PTFE can be used to create a porous stent to facilitate the delivery of drugs. The wire 94 can also be hollow (passageway 95) so that the stent 90 can simultaneously deliver drugs and radioactive fluid or temperature regulating fluid.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A method to retrieve a deployed stent in a blood vessel. In one embodiment, the method includes the introduction of a retrieval stent within the lumen of the deployed stent, enlarging the retrieval stent to contact a surface of the deployed stent and contracting the retrieval stent which in turn causes the deployed stent to contract for removal from the blood vessel. The retrieval stent may contain one or more fluid passageways through which heated or cooled fluid can circulate and may be connected to a catheter for circulation of the fluid. Fluid flow may be regulated by a valve or valve assembly incorporated in the stent and / or the catheter.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This application is a continuation of application Ser. No. 10 / 638,182, filed Aug. 7, 2003, now U.S. Pat. No. 6,881,220, which is a division of application Ser. No. 09 / 975,743, filed Oct. 11, 2001, now U.S. Pat. No. 6,623,519, which is a division of application Ser. No. 09 / 321,496, filed May 27, 1999, now U.S. Pat. No. 6,358,276, which claims the benefit of U.S. Provisional Application No. 60 / 105,768, filed Sep. 30, 1998. This application expressly incorporates by reference the entirety of each of the above-mentioned applications as if fully set forth herein.STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT [0002] Not applicable. REFERENCE TO A COMPACT DISK APPENDIX [0003] Not applicable. BACKGROUND OF THE INVENTION [0004] The present invention relates generally to endoluminal devices, and more particularly to stents. [0005] Stents and similar endoluminal devices have been used to expand a constricted vessel to maintain an ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(United States)
IPC IPC(8): A61M31/00A61F2/00A61F2/82A61F2/88A61M25/00
CPCA61F2/82A61F2250/0067A61F2210/0042A61F2/88
Inventor EDWIN, TARUN J.
Owner BARD PERIPHERAL VASCULAR
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com