Surgery – Instruments – Sutureless closure
Patent
1991-12-03
1992-12-15
Pellegrino, Stephen C.
Surgery
Instruments
Sutureless closure
606232, A61B 1700
Patent
active
051712598
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE ART
This invention relates to a device for occluding a defect in in the heart such as septal defects nonoperatively, that is, without performing an open chest or other major surgical operation.
PRIOR ART
In some heart diseases such as septal defects a hole exits in the wall of the heart and blood is shunted through the hole. To treat the desease it has been customary to occlude the hole by a patch by performing an open chest operation.
A nonoperative method called the umbrella method has been developed in the United States.
The open chest method of treatment has a disadvantage that it involves a great lesion and leaves a scar in the surface of the patient's body.
According to the umbrella method, since a pair of patches are connected only at the central portions thereof, the defect to be occluded is not always positioned at the central portions of the patches, so that the patches may be displaced to cause leakage to occur or get out of the defect.
The invention has been accomplished in view of the above problems in the prior art. The object of the invention is to provide a device which can nonoperatively occlude a defect simply and certainly without leaving a scar in the surface of the body.
DISCLOSURE OF THE INVENTION
The device for nonoperatively occluding a defect according to the invention (which will be referred to as the occlusive device) is characterized by that a pair of patches, each of which comprises a resilient, foldable annular frame and a piece of cloth stretched over and fixed to the frame, are disposed opposite to each other with a gap therebetween and connected by a thread, which is led out of one of the patches in such a manner that by pulling the thread led out of the patch the two patches are caused to approach each other.
It is preferable to have the two patches sewed by a thread along a coaxial circle on each of the patches slightly inwardly of the circumferential edge thereof.
The thread is led out of one of the patches preferably at the center thereof.
Shrink-preventing members may be provided on that surface of one of the patches which faces the other so as to extend from a position slightly inward of the circumferential edge of the patch to a position near the center thereof.
The occlusive device of the above construction can be implanted in a defect in the following manner. The two patches, each of which comprises a resilient, foldable annular frame and a piece of cloth stretched over and fixed to the frame, are folded and inserted into a catheter and brought to the defect which is the objective position. Then, only the front patch beyond the defect is restored to its annular shape by the resiliency of the annular frame. Then, the rear patch in front of the defect is restored to its annular shape by the resiliency of the annular frame. Then, the thread extending from the rear patch is pulled so as to cause the two patches at the opposite sides of the defect to approach each other and hold the periphery of the defect therebetween. As a result, the defect can be nonoperatively occluded by the two patches simply and certainly without scarring the surface of the body.
If the two patches are sewed by a thread along a circle a little inward of the circumferential edge of each of the patches, the two patches are put together a little inward of the circumferential edge of the defect, so that the peripheral portions of the patches can hold the peripheral portion of the defect the more securely. With the thread led out of the patch at its central part, by pulling the thread it is possible to cause the two patches to approach each other efficiently in well-balanced condition.
With the shrink-preventing members provided on one of the patches in such a manner that they extend from a position a little inward of the periphery of the patch to a position near the center thereof, it is possible to prevent the patch from being shrunk in the radial direction when the thread is pulled, and occlude the defect by the two patches without fail.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG
REFERENCES:
patent: 3874388 (1975-04-01), King et al.
patent: 4007743 (1977-02-01), Blake
patent: 4917089 (1990-04-01), Sideris
Jackson Gary
Pellegrino Stephen C.
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