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Delayed memory device

a memory device and delay technology, applied in the field of medical devices, can solve the problems of unsatisfactory reduction of the circumference of the mitral annulus, risk of device dislocation,

Inactive Publication Date: 2006-08-17
EDWARDS LIFESCIENCES AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The device provides a secure and less invasive means to reshape body vessels, allowing for controlled and gradual changes that align with the body's healing process, reducing the risk of dislocation and improving treatment outcomes for conditions like mitral annulus dilatation.

Problems solved by technology

However, the position fixation of the elongate stent in the coronary sinus by means of the hooks might be insufficient, so that the sudden release of the contraction of the elongate stent dislocates it.
This dislocation of the device might result in unsatisfactory reduction of the circumference of the mitral annulus.
Also with this method there is a risk of dislocation of the device, since the surgeon might accidentally move insufficiently fixed stent sections out of their proper position while manipulating them from outside the vein system.

Method used

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Examples

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Embodiment Construction

[0107] FIGS. 1 to 4 show the principle of delayed shortening according to the invention.

[0108] In FIG. 1, a shape-changing member 1, here in the form of a thread 1, made of or at least in part including a shape memory material is shown having a curved shape. This shape is the original shape that the shape-changing member 1“remembers” and will assume when the temperature thereof passes a certain threshold, e.g. exceeds 30.degree. C.

[0109]FIG. 2 shows the shape-changing member 1 of FIG. 1 having been straightened by stretching to a substantially straight shape.

[0110]FIG. 3 illustrates an embodiment of a device according to the invention, where the device is in its non-activated state of shape A. More specifically, by covering the stretched and straight shape-changing member 1 in FIG. 2 with a delay means 2, here in the form of a tube 2 having a sufficiently small inner cross-section, the stretched shape of the shape-changing member 1 can be maintained even when the device is implan...

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Abstract

A delivery system for delivering a prosthetic heart valve to a native valve site within the human vasculature. The prosthetic valve is disposed on a balloon at the end of a balloon catheter. The balloon catheter passes through a delivery sleeve assembly and handle. A pull wire travels from the handle to a distal end of the delivery sleeve assembly. Actuation of the handle pulls on the pull wire, which causes openings in a slotted tube of the delivery sleeve assembly to close, thus causing the delivery sleeve assembly to bend. A stretchable cover is placed over the slotted tube for biasing the steerable catheter toward a straight position. Once advanced to the native valve site, the prosthetic valve is deployed by inflating the balloon.

Description

CROSS-REFERENCE TO RELATED APPLICATION [0001] The present application is a divisional of co-pending, commonly assigned U.S. patent application Ser. No. 10 / 141,348, filed on May 9, 2002, which is incorporated by reference herein in its entirety.TECHNICAL FIELD OF THE INVENTION [0002] The present invention relates to a medical device for providing a change of shape in a part of the body of an organism. The invention further relates to a device and a method for reshaping a body vessel, and a device and a method for restraining growth of a body organ of an organism. BACKGROUND OF THE INVENTION [0003] At present the treatment of mitral annulus dilatation and other mitral insufficiencies consists of either repair or mitral valve replacements. Both methods require open-heart surgery, by the use of total cardiopulmonary by-pass, aortic cross-clamping and cardioplegic arrest. To certain groups of patients, open-heart surgery is particularly hazardous and therefore a less invasive method for ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61F2/06A61F2/02A61F2/04A61F2/07A61F2/24A61F2/26A61F2/82A61F2/848
CPCA61F2/07A61F2/2451A61F2/2481A61F2/26A61F2002/043A61F2002/072A61F2002/826A61F2002/828A61F2002/8483A61F2210/0004
Inventor SOLEM, JAN OTTOKIMBLAD, PER OLA
Owner EDWARDS LIFESCIENCES AG
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