JPH0570549U - Closure plug for patent ductus arteriosus and atrial septal defect - Google Patents

Abstract

(57) [Summary] [Purpose] To facilitate percutaneous closure for patent ductus arteriosus, atrial septal defect and other shunt diseases. [Structure] In order to close an arterial canal or an atrial septal defect or the like, two spirally wound wires 2 are joined to face each other, and the spirally wound wire 2 is extended and extended. It can be restored to its original spiral shape. Further, the closure plug 1 using a shape memory alloy as the wire 2. Further, the closure 1 is provided with a connecting portion 3 that can be connected to and separated from the operating catheter.

Description

[Detailed description of the device] [Industrial applications]

[0001] The present invention relates to a therapeutic device for use in the treatment of patent ductus arteriosus, atrial septal defect and other shunt diseases and embolization therapy.

[Prior Art]

In recent years, percutaneous closure using a catheter has been performed in addition to surgery as a treatment for patent ductus arteriosus and congenital atrial septal defect. As the percutaneous closure, the PORSTMANN method using a closure plug made of compressed sponge and the RASHKIND method using a closure plug that can be opened and closed like an umbrella have been implemented.

[Problems to be solved by the device]

In the case of the PORSTMANN method, since the obturator plug is made of a compressed sponge, the obturator plug is stiff and lacks elasticity, and the femoral artery may be damaged when the obturator plug is inserted from the femoral artery, which results in closure. The diameter of the arterial tube that can be formed was limited by the thickness of the femoral artery. Moreover, the procedure for placing the obturator plug in the arterial duct was also complicated.

In the RASHKIND method, the obturator can be opened and closed like an umbrella, and when the obturator is inserted from a peripheral blood vessel, the obturator is folded and moved in the catheter to reach the arterial canal or the atrial septal defect. Although it was possible to reach the obturator easily, it is necessary to have skill in the procedure at the time of closure, and it may be difficult to place the obturator due to the morphology of the arterial tube, or if short-circuit blood flow remains after placement. there were.

[Means for Solving the Problems]

In order to solve the above problems, a spirally wound wire 2 is extended and restored to its original spiral shape by a closure 1 in which two spirally wound wires 2 are connected so as to face each other. What is possible. The closure 1 using a shape memory alloy as the wire 2. The closure 1 is provided with a connecting portion 3 which is connected to an operating catheter for operating the closure 1 from outside the body and which is separable from the operation catheter when the closure 1 is left in place.

[Action]

Next, the operation of this invention will be described.

If a guiding catheter is inserted from a peripheral blood vessel and the tip of the guiding catheter is advanced to an indwelling site such as an arterial canal or an atrial septal defect, the two spirally wound wires 2 are extended to guide the guiding catheter. By moving the inside, the obturator plug 1 can be advanced from the peripheral blood vessel to the indwelling site such as the arterial canal or the atrial septal defect.

When the stretched wire 2 is taken out into the blood vessel through the tip of the guiding catheter, the wire 2 is restored to its original spiral shape. The arterial tube or the atrial septal defect can be closed by placing the closure plug 1 so that the two helices sandwich the arterial tube or the atrial septal defect.

The above operation can be performed by operating the operating catheter, which is connected to the closing plug 1 at the connecting portion 3, outside the body. If the closure plug 1 can be placed, the operating catheter can be separated from the closure plug 1 at the connecting portion 3.

The wire 2 wound in a spiral shape can be restored to the original spiral shape even when stretched. However, if a shape memory alloy is used as the wire 2, it is easier and more reliable to stretch and restore the wire 2. Becomes

【Example】

Embodiments of the present invention will be described with reference to the accompanying drawings.

First embodiment

1, 3, 4, and 5 are front views showing a first embodiment of the present invention, and FIG. 2 is a side view showing a first embodiment of the present invention.

FIGS. 1 and 2 show a closing plug 1 in which both ends of a single wire 2 are spirally wound, and two spirally wound wires 2 at both ends face each other. The wire 2 wound around the wire can be extended and restored to its original spiral shape.

FIG. 3 shows the case where the two spirally wound wires 2 are fully extended. Since the closure 1 is a straight line, it must be moved in the guiding cattle. You can

FIG. 4 is a view when the closure plug 1 is left in the arterial tube, and FIG. 5 is a view when the closure plug 1 is left at the atrial septal defect. When the obturator plug 1 is placed in the arterial canal or atrial septal defect, the spirally wound wire 2 is stretched as shown in Fig. 3 and the original spiral as shown in Fig. 1 is obtained. Since it tries to regain its shape, it can be placed so as to sandwich the arterial canal or the atrial septal defect from both sides.

Second embodiment

With the closure 1 described in the first embodiment using the shape memory alloy as the spirally wound wire 2, the extension and restoration of the wire 2 are easier and more reliable.

Third embodiment

FIG. 6 is a side view showing a third embodiment of the present invention.

As shown in FIG. 6, the first embodiment is provided with a connecting portion 3 which is connected to an operating catheter for operating the closure 1 from outside the body and is separable from the operation catheter when the closure 1 is left in place. The closure 1 described.

[Effect of the device]

Since the closure plug 1 composed of the spirally wound wire 2 is extended and moved inside the guiding catheter, the closure plug 1 can be easily removed from the peripheral blood vessel to the arterial duct or the atrial septal defect without damaging the peripheral blood vessel. It can reach the indwelling site such as the mouth.

Further, since the closing plug 1 is placed so as to sandwich the arterial tube or the atrial septal defect or the like from both sides by the restoring force of the wire 2, the closing plug 1 can be easily placed and the risk of falling off is small.

If a shape memory alloy is used for the wire 2, the wire 2 can be easily and surely stretched and restored.

By changing the morphology of the helix, it can be used for treatment and embolization therapy of various sizes and morphologies of patency of arteriovascular system, atrial septal defect and other shunt diseases.

[Brief description of drawings]

FIG. 1 is a front view showing a first embodiment of the present invention,

FIG. 2 is a side view showing a first embodiment of the present invention,

FIG. 3 is a front view showing a first embodiment of the present invention,

FIG. 4 is a front view showing a first embodiment of the present invention,

FIG. 5 is a front view showing a first embodiment of the present invention,

FIG. 6 is a side view showing a third embodiment of the present invention.

[Explanation of symbols]

 1 is a closure plug, 2 is a wire, and 3 is a connecting part.

Claims (3)

[Scope of utility model registration request] 1. A closure plug (1) comprising two spirally wound wires (2), which can be extended and restored to their original form, connected to face each other. 2. The closure (1) according to claim 1, wherein a shape memory alloy is used as the spirally wound wire (2). 3. The closure (1) according to claim 1, further comprising a connecting portion (3) capable of being connected to and separated from the operating catheter.