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Split ends closure device

a technology of defects and closure devices, applied in wound clamps, medical science, surgery, etc., can solve problems such as potential adverse side effects, and achieve the effects of small diameter delivery sheaths, good conformity, and convenient manufacturing

Inactive Publication Date: 2005-12-01
NMT MEDICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0009] Benefits of certain embodiments can include atraumatic shape, good conformity to the anatomy (especially when used for a PFO), small diameter delivery sheath, no permanent foreign material, ease of manufacturing, cost effectiveness, and overall simplicity. Other features and advantages will become apparent from the following detailed description and drawings.

Problems solved by technology

These patients can be treated with oral anticoagulants, but such drugs have the potential for adverse side effects such as hemorrhaging, hematoma, and interactions with other drugs.

Method used

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Examples

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Embodiment Construction

[0019] The present invention includes embodiments of a closure device for a PFO, atrial septal defect (ASD), or other suitable defect, preferably formed from a single tube with cuts made to produce the final device shape. The device can have struts that extend radially outwardly from a central portion, or loops that extend from the central portion and back to the central portion, preferably in a plane that is parallel to the defect (such as the PFO tunnel).

[0020] Referring to FIG. 1, in one embodiment a closure device is made from a single polymer tube 10 by providing slits 12, 14 at both ends and setting a desired shape, such as by thermo-mechanical treatment, to produce a design as shown in FIG. 2. This treatment can include heating or other thermal steps, and mechanical steps, such as folding back the struts.

[0021] This device has a first set of struts 16a, 16b and a second set of struts 18a, 18b at the opposite end. A center portion 20 is between the ends and typically has no ...

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Abstract

A device closes a patent foramen ovale (PFO), thus reducing or eliminating blood flow through the defect. The device is formed from a tubular structure having split ends, such that, after insertion, struts defined by the split ends pivot in a radial direction away from the tube, thereby securing the device within the septal defect.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This application claims priority to U.S. Provisional Application 60 / 561,544, filed Apr. 9, 2004, the entire contents of which are incorporated herein by reference.BACKGROUND OF THE INVENTION [0002] The invention relates to devices and methods for closing defects such as a patent foramen ovale (PFO). [0003] A PFO is a persistent, one-way, usually flap-like opening in the wall between the right atrium and left atrium of the heart. Since left atrial (LA) pressure is normally higher than right atrial (RA) pressure, the flap typically stays closed. Under certain conditions, however, RA pressure can exceed LA pressure, creating the possibility for right to left shunting that can allow blood clots to enter the systemic circulation. [0004] In utero, the foramen ovale serves as a physiologic conduit for right-to-left shunting. After birth, with the establishment of pulmonary circulation, the increased left atrial blood flow and pressure results ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61B17/00A61B17/08
CPCA61B17/0057A61B2017/00243A61B2017/00867A61B2017/00592A61B2017/00606A61B2017/00575
Inventor CHANDUSZKO, ANDRZEJ J.
Owner NMT MEDICAL
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