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Articulated center post

a center post and occlusion technology, applied in the field of occlusion devices, can solve the problems of reducing the ability of the device to occlude the defect, difficulty in ensuring that the occlusion device conforms to the contours of the defect, and requiring open heart surgery for certain cardiac defects in adults and children, so as to achieve the effect of effectively closing a physical anomaly, increasing the ability of the occlusion device, and more accurately conforming to the d

Inactive Publication Date: 2006-06-01
CARDIA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

"The present invention is an occlusion device that can better close physical defects. It has a unique design with two occluding bodies and an articulated center section. The center section allows the device to better conform to the defect. The center section includes a ball and socket joint with interlocking elements to prevent rotation of the first occluding body relative to the second occluding body. This allows for easier positioning of the occlusion device and ensures better closure of the defect."

Problems solved by technology

Normally, permanently repairing certain cardiac defects in adults and children requires open heart surgery, a risky, expensive, and painful procedure.
A potential draw back to these devices is the difficulty in ensuring that the occluder conforms to the contours of the defect.
Poor conformation to the defect results in poor seating of the device which decreases the ability of the device to occlude the defect.
Ensuring the proper seating of an occlusion device once it has been deployed poses a continuing challenge given the uneven topography of the vascular and septal walls of each patient's heart.
The challenge in designing an occluder which conforms to the uneven topography is compounded by the fact that the contours of each defect in each individual patient are unique.
Lack of conformation to the walls of the heart can place significant amounts of stress on the occlusion device and decrease fatigue life.
Broken parts increase the likelihood of damage to the surrounding tissue and lead to patient anxiety.
Another obstacle which maybe encountered is the difficulty in readily distinguishing the individual occluder elements in order to determine their position in relation to each other and allow for repositioning, while still maintaining the flexibility needed for better conformation.

Method used

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Examples

Experimental program
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Effect test

first embodiment

[0055]FIG. 5a is a side view of second center post 74 with rotation-inhibiting capabilities. Shown is knob 24, three holes 80, second center post 74, head 120, first neck 122, body 124, second neck 126, and pegs 138a-c. Peg 138d cannot be seen from this perspective. As described with reference to FIG. 1, three holes 80 are drilled through second center post 74 to allow for attachment of wire arms 16.

[0056] Head 120 located at a first end of second center post 74 is connected to body 124 of second center post 74 at first neck 122. Knob 24 is located on the second end of body 124 and is connected to body 124 by second neck 126. To assist in assembly, which is discussed in more detail below, the body 124 of second center post 74 is preferably smaller in diameter than head 120. Knob 24 has a smaller diameter than both body 124 and head 120. For example, head 120 may have a diameter A of about 1.35 millimeters, body 124 may have a diameter B of about 1.2 millimeters, and knob 24 may have...

second embodiment

[0076]FIG. 11 is a perspective side view of a center post with rotation-inhibiting capabilities. Shown is knob 24, center post 74, holes 80, head 120, first neck 122, body 124, second neck 126, and channels 139a-139b.

[0077] In this embodiment, head 120 includes channels 139a-139b located concentrically around the rounded surface of head 120. Channels 139a-139b may be evenly spaced to provide better articulation when coupled with a center connector, as described in FIG. 12. Center post 74 is preferably formed of a hard metal, such as titanium. Channels 139a-139b may be machined directly into the titanium, using a process such as electrical discharge machining.

[0078] Although in FIG. 11, head 120 is shown with two channels 139a-139b, the present invention is not so limited. Head 120 may include any number of channels 139a-139b, including as few as one channel 139a-139b. In addition, while this embodiment is shown with respect to center post 74, which includes second neck 126 and kno...

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Abstract

This invention relates to an occlusion device for the heart, having an articulated center post which prevents rotation of the individual occluder elements around the center post, while allowing the device to better conform to the contours of the heart to increase sealing abilities and reduce breakage resulting from conformation pressure.

Description

CROSS-REFERENCE TO RELATED APPLICATION(S) [0001] This application is a continuation-in-part of U.S. application Ser. No. 10 / 348,865, filed Jan. 22, 2003.BACKGROUND OF THE INVENTION [0002] This invention relates to an occlusion device for the closure of physical apertures, such as vascular or septal apertures. More specifically, this invention relates to an occlusion device for the heart, having an articulated center post which allows the device to better conform to the contours of the heart. [0003] Normally, permanently repairing certain cardiac defects in adults and children requires open heart surgery, a risky, expensive, and painful procedure. To avoid the risks and discomfort associated with open heart surgery, modern occlusion devices have been developed that are small, implantable devices capable of being delivered to the heart through a catheter. Rather than surgery, a catheter inserted into a major blood vessel allows an occlusion device to be deployed by moving the device t...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61B17/08A61B17/00A61B17/12
CPCA61B17/0057A61B2017/00243A61B2017/00575A61B2017/00592A61B2017/00606
Inventor MARINO, JOSEPH A.CORCORAN, MICHAEL P.
Owner CARDIA INC
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