Septal defect closure device
DC CAFCFirst Claim
1. A septal defect closure device comprising first and second occluding disks, each disk comprising a flexible, biologically compatible membrane capable of being collapsed for passage through a catheter and elastically returning to a predetermined shape for tautly holding a portion of the membrane against a septum;
- a central portion of the membrane of the first disk being affixed to a central portion of the membrane of the second disk to define a conjoint disk having a diameter, a maximum dimension of at least one of the first and second disks being between about 1.6 and about 2.5 times the diameter of the conjoint disk.
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Abstract
The present invention provides a system and a method for closing septal defects and the like. The system includes a closure device having a pair of occluding disks, each disk being formed of a membrane and an elastically deformable frame carried about the periphery of the membrane. The frame, which may be formed of a superelastic material, is capable of being collapsed for passage through a catheter and elastically returning to a predetermined shape for tautly holding the membrane. A central portion of the membrane of each disk is attached to a central portion of the other membrane to define a conjoint disk. The method of the invention involves collapsing the frames of the disks, inserting the closure device into a catheter, and positioning the distal end of the catheter adjacent a septal defect. The first disk is then urged out of the distal end of the catheter to permit its frame to elastically return to a predetermined shape, pulling the membrane taut on one side of the defect. The second disk is then similarly deployed on another side of the defect, automatically positioning the conjoint disk within the defect to occlude it.
592 Citations
32 Claims
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1. A septal defect closure device comprising first and second occluding disks, each disk comprising a flexible, biologically compatible membrane capable of being collapsed for passage through a catheter and elastically returning to a predetermined shape for tautly holding a portion of the membrane against a septum;
- a central portion of the membrane of the first disk being affixed to a central portion of the membrane of the second disk to define a conjoint disk having a diameter, a maximum dimension of at least one of the first and second disks being between about 1.6 and about 2.5 times the diameter of the conjoint disk.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method of closing a septal defect in a septum comprising the steps of:
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(a) determining the size of the defect; (b) selecting a closure device comprising first and second disks, each disk comprising a flexible structure having a periphery, a portion of the structure of the first disk being joined to a portion of the structure of the second disk by a joining segment having a size approximating the size of the defect; (c) collapsing the first and second disks and inserting the closure device in a catheter having a distal end; (d) positioning the distal end of the catheter adjacent a septal defect; (e) urging the first disk of the closure device out of the distal end of the catheter and permitting the first disk to elastically return to a predetermined shape on a first side of the defect; and (f) urging the second disk of the closure device out of the distal end of the catheter and permitting the second disk to elastically return to a predetermined shape on a second side of the defect, opening of the second disk automatically urging at least the peripheries of the first and second disks against opposite sides of the septum and positioning the joining segment within the defect to substantially fill the defect. - View Dependent Claims (18, 19, 20, 21, 22, 23)
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- 24. A septal defect closure device comprising first and second occluding disks, each disk comprising a membrane formed of a porous, biologically compatible fabric, each of the membranes being capable of being collapsed for passage through a catheter and elastically returning to a predetermined shape for tautly holding a portion of the membrane against a septum, a central portion of the membrane of the first disk being joined to a central portion of the membrane of the second disk with a piece of another material being disposed between the affixed central portions of the first and second disks.
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28. A method of closing a septal defect in a septum comprising the steps of:
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(a) providing a closure device comprising first and second disks, a portion of the first disk being connected to a portion of the second disk by a tubular segment sized to approximate the size of the defect; (b) collapsing the first and second disks and inserting the closure device in a catheter having a distal end; (c) positioning the distal end of the catheter adjacent a septal defect; (d) urging the first disk of the closure device out of the distal end of the catheter and permitting the first disk to elastically return to a predetermined shape on a first side of the defect; and (e) urging the second disk of the closure device out of the distal end of the catheter and permitting the second disk to elastically return to a predetermined shape on a second side of the defect, opening of the second disk automatically urging the first and second disks against opposite sides of the septum and positioning the tubular member in close proximity to a periphery of the defect. - View Dependent Claims (29)
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- 30. A septal defect closure device comprising first and second occluding disks, each disk comprising a flexible, biologically compatible membrane capable of being collapsed for passage through a catheter and elastically returning to a predetermined shape for tautly holding a portion of the membrane against a septum, a central portion of the membrane of the first disk being affixed to a central portion of the membrane of the second disk by a tubular segment of the fabric of the membrane of the second disk.
Specification