KR19990014569A - Expansion mechanism insertion device to expand the narrowing part of the body - Google Patents

Abstract

The present invention relates to an insertion device for inserting a high elastic expansion mechanism using a shape memory alloy to expand the stenosis of the body into the stenosis of the body.

The present invention is intended to be used semi-permanently as a single procedure because the high elastic expansion mechanism using the shape memory alloy is simply, effectively inserted and installed to expand the lesion site.

In order to achieve this object, in the present invention, the insertion tube and the pressing iron core are connected to each other and integrated in both ends of the flexible moving tube which is installed to be movable in an outer tube made of a flexible hollow body having a constant diameter. The other end of the handle is formed on the outside of the operating body, and the insertion tube is formed at one end of the insertion end formed with a stepped, the insertion tube at a distance smaller than the length of the expansion mechanism from the end of the insertion end Providing the expansion mechanism inserting apparatus of the present invention having a structure in which a pressing piece having a diameter larger than the diameter of the moving tube is installed on the plate to return the expansion mechanism to its original size and to push out the lesion to expand. It is characterized by providing an expansion mechanism insertion device.

Description

Expansion mechanism insertion device to expand the narrowing part of the body

The present invention relates to an insertion device for inserting a high-elastic expansion mechanism using a shape memory alloy to expand the constriction of the body into the constriction of the body, and more specifically, to the blood mass as well as narrowing of the blood vessel by blood clots in the blood vessels. The stenosis of the body for insertion of a series of body adsorption processes or expansion mechanisms for widening the passage of the adsorption site such as stricture of the esophagus, biliary stenosis, urethral stenosis, and intra-vein intrahepatic portal installation. An expansion mechanism insertion device for expanding.

In general, blood vessels cause various diseases by blocking or adsorbing blood vessels by blood clots and atherosclerosis.

When the adsorption progression or adsorption of such blood vessels occurs, artificial blood vessel replacement or bypass composition is used in the above-described areas mainly through surgical operations.

However, such a surgical operation is required to remove the body of the lesion, so that the area is very large, leaving a large scar, and also requires a lot of nursing period, there is a disadvantage that the surgical effect is not very high.

In particular, in the case of such vascular diseases, hypertension, heart disease, etc. appear in most cases, the operation itself is impossible in this case patients.

In order to overcome this problem, a small hole is made in the femoral artery recently without performing an incision, and the balloon is inflated by adsorbing or narrowing the balloon catheter tube from the outside of the human body to the inside of the blood vessel. The state is using angioplasty.

However, such angioplasty usually occurs after 3-4 months of restenosis, which requires repeated treatments, so that the patient suffers from regular pain as well as an economic burden.

In addition, if the vascular disease as well as the esophagus caused by cancerous tissues or the progression of the food is not possible intake of food into the mouth is not possible because you need to put food through the tube through the hole from the stomach to the stomach to the patient as well as the family It is causing great mental pain.

In addition to the biliary stricture, narrowing of the urethra, and the artificial passage between the intravenous hepatic portals, of course, if any other organ obstruction or narrowing occurs, the procedure is performed as described above.

Even in these cases, mental and economic burdens are becoming more of a problem for the patients and their families than for the effects of treatment.

In order to solve this problem, the applicant has selected an extension mechanism that can be used semi-permanently as a procedure when selecting the material of the superelastic shape memory alloy and installing it on the lesion site, which is shown in FIGS. 1 and 2. As described above, a hollow cylindrical body 3 having a certain length is formed to have a plurality of rhombic space portions 2 by weaving one superelastic shape memory alloy material having a diameter of 0.1 to 0.5 mm at different positions. Both ends are formed with an insertion end 4 and a discharge end 4 'having a plurality of curved shapes at regular intervals, and the superelastic shape memory alloy material after forming the hollow cylindrical body 3 having the predetermined length Both ends of the bar has been provided to the expansion mechanism (5) made by positioning the inside of the hollow cylindrical body (3).

When the expansion mechanism (5) is inserted into the lesion site of the body by pushing the lesion outwards by the high elastic force constituting it to expand the passages inside the blood vessels.

The present invention is semi-permanently as a single procedure because the high elasticity expansion mechanism using the semi-permanent use of the shape memory alloy previously filed by the present applicant can be easily and effectively inserted and installed in the lesion site of the body to expand the lesion site. Its purpose is to make it available.

An object of the present invention is to expand the passage by pushing the lesion to effectively position the expansion mechanism in the lesion site of the body.

In the present invention, when the expansion mechanism is incorrectly positioned in the desired lesion site, it is pushed back into the outer tube while reducing the volume and then again finding the location of the lesion site so that it can be accurately installed.

Therefore, the present invention is intended to be able to install the expansion mechanism in the correct lesion.

In order to achieve the above object, in the present invention, the insertion tube and the pressing iron core are connected to each other and integrated in both ends of the flexible moving tube which is installed to be movable in the outer tube made of the flexible hollow body having a constant diameter. The other end of the handle is formed on the outside of the operating body, and the insertion tube is formed at one end of the insertion end formed with a stepped, the insertion tube at a distance smaller than the length of the expansion mechanism from the end of the insertion end It is to provide an expansion device insertion apparatus of the present invention consisting of a structure in which a pressing piece having a diameter larger than the diameter of the moving tube is installed on.

The expansion device insertion apparatus according to the present invention was able to achieve the present invention by enabling the expansion mechanism to be installed on the lesion site accurately by using the expansion mechanism.

1 and 2 show the expansion mechanism pre- filed by the applicant,

1 is a perspective view,

2 is a front configuration diagram.

3 is a cross-sectional configuration of the present invention;

4 and 5 is an operational state diagram of the present invention.

6 to 8 is a cross-sectional view showing a state in which the expansion mechanism is installed in the stenosis according to the present invention,

<Description of the code | symbol about the principal part of drawing>

5: expansion mechanism 15: moving tube

20: Insertion tube 21: Pressure piece

22: step 23: insertion end

Hereinafter, with reference to the accompanying drawings for a preferred embodiment of the present invention will be described in detail.

3 to 5 show the device of the present invention in detail.

The flexible outer tube 13, which is a hollow body, is fixed to the working body 14 in which the handle 11 is mounted so that the pressurized iron core 12 fixed at one end can move forward and backward, and closed in the closed state. In one end of the pressing core 12 is made of a structure in which a flexible moving tube 15 fixed to be moved in accordance with the movement of the pressing iron core 12 in the outer tube 13, the fixed, An end of the flexible moving tube 15 is fixed to the insertion tube 20, the end of the insertion tube 20 is formed softly formed with the stepped end 22 is built into the outer tube 13 integrally The insertion end 23 of the ash is connected and fixed, and the insertion tube 20 has a predetermined distance from the step 22 of the insertion end 23 to be in close contact with the inner diameter of the outer tube 13, the moving tube 15 It consists of a structure in which the pressing piece 21 having a diameter larger than the diameter of It provides an expansion tool insertion unit to extend the blocking parts of the body.

At this time, when the position of the pressing piece 21 installed in the insertion tube 20 is reduced at least by minimizing the diameter of the expansion mechanism 5 to be used from the stepped end 22 of the insertion end 23. Install at a distance less than the maximum length (L).

In addition, by setting the maximum length (L) generated when the expansion mechanism (5) to reduce the volume by minimizing the diameter as described above, the display portion 24 having the same length (L) of the expansion tube (13) It can be configured by marking it at the top.

Reference numeral 30 is a hermetic ring for sealing.

The operation and the effects of the apparatus of the present invention will be described with reference to FIGS. 6 to 8.

First, in using the apparatus of the present invention, the outer tube (not shown) is inserted into the insertion tube 20 in a state in which the expansion mechanism 5 previously applied by the inventors of the present invention has minimized the diameter to minimize the volume. 13) built in.

At this time, one end of the expansion mechanism 5 is positioned on the pressing piece 21 formed on the insertion tube 20, respectively, and the other end is located on the step 22 of the insertion end 23. As described above it is embedded in the outer tube (13).

In this state, one end of the expansion mechanism 5 is maintained in close contact with the inner surface of the outer tube 13 in a state in which the end portion is pressed by the pressing piece 21, and the other end has a diameter of the shovel pressing end 23. Since the other end of the expansion mechanism (5) is built in the inside of the outer tube (13) in a state located in the step (22) smaller than the diameter of the) is installed so as not to protrude out of the insertion end (23).

As such, when the preparation for insertion of the expansion mechanism 5 is completed, a series of surgical operations are performed to install the expansion mechanism 5 on the lesion site based on angioplasty.

In this case, the insertion end 23 is freely movable in the blood vessel 50 because the end is composed of a sharp tip, the outer tube 13 and the moving tube 15 inserted into the blood vessel 50 and the insertion Because the tube 20 is flexible, it can be easily moved along the curved blood vessel.

Thus, while inserting the above-described insertion end 23 to reach the lesion site 52 while moving the device of the present invention.

At this time, the end of the expansion mechanism 5 is installed inside the outer tube 13 in the state of being positioned on the step 22 of the insertion end 23, without any influence on the inner wall of the blood vessel 50. Will be inserted.

When the insertion end 23 reaches the lesion site 52 in the blood vessel 50 by this method, the handle 11 is gradually pushed to hold it.

When the handle 11 is pushed and pushed in this way, the pressurized iron core 12 connected to the handle 11 moves in the working body 14, and accordingly the moving tube 15 fixed to the pressurized iron core 12. ) Also moves within the outer tube 13.

The movement of the moving tube 15 is to push the insertion tube 20 to the outside of the outer tube 13, so the stepped end 22 of the insertion end 23 is fixed to the end of the insertion tube 20 It will come out from the inside of the outer tube (13).

By this action, the expansion mechanism 5 also expands in diameter as it immediately swells out of the outer tube 13 due to the phenomenon of returning to the original shape while exiting from the inside of the outer tube 13. do.

During this action, since the pressing piece 21 formed in the insertion tube 20 is located at the end of the expansion mechanism 5 and is in close contact therewith, the pressing piece 21 when the insertion tube 20 moves as described above. It moves with this expansion mechanism 5 mentioned above.

On the other hand, as described above, when the expansion mechanism 5 is pushed out of the outer tube 13, the installation position of the expansion mechanism 5 may be changed by an operator or by incorrectly selecting an installation position.

In this case, if a part of the expansion mechanism 5 is discharged, and it is moved as it is in this state, the end of the expansion mechanism 5 touches the inner wall of the blood vessel 50, causing pain to the patient or in the worst case. Since there is a risk of damaging the blood vessel 50 (although the ends of the expansion mechanism 5 previously filed by the present inventors are curved in order to prevent such cases from occurring), the expansion mechanism 5 is replaced by an outer tube ( It needs to be built into the inside of 13).

When this happens, holding the above-mentioned handle (11) and pulled upside down when the fixed pressing core 12, the moving tube (15) and the insertion tube (20) connected to the previously moved handle (11) again outside The inside of the tube 13 is moved.

At this time, since the end of the expansion mechanism 5 is in close contact with the pressing piece 21 formed in the insertion tube 20 as described above, the insertion tube 20 is moved into the outer tube 13 as described above. When moving, it is to move while pulling the expansion mechanism (5).

By this operation, the expansion mechanism 5 can be completely moved into the inside of the outer tube 13 in its original position.

In this way, after changing the installation position, the insertion end 23 is placed again on the lesion site 52 as described above, and then the handle 11 is pushed to the handle 11 again when the pressure is fixed and connected to the handle 11 The iron core 12 moves in the working body 14, and thus the moving tube 15 fixed to the pressurized iron core 12 also moves in the outer tube 13.

The movement of the moving tube 15 is to push the insertion tube 20 to the outside of the outer tube 13, so the stepped end 22 of the insertion end 23 is fixed to the end of the insertion tube 20 It will come out from the inside of the outer tube (13).

By this action, the expansion mechanism 5 also expands in diameter as it immediately swells out of the outer tube 13 due to the phenomenon of returning to the original shape while exiting from the inside of the outer tube 13. Will be.

In this way, the expansion mechanism 5 completely escaped from the outer tube 13 pushes out the lesion part 52 located in the blood vessel 50 outward while completely returning to the original size. do.

At this time, since the expansion mechanism 5 has a diameter of about 10 to 30% larger than the inner diameter of the blood vessel 50, the lesion 52 is pushed outward without moving the position by the elastic force. Maintain the expansion of the blood vessel (50).

After the expansion mechanism 5 is installed on the lesion site 52 as described above, the insertion of the expansion mechanism 5 is taken out to the outside, so that the procedure can be easily completed.

On the other hand, the display unit 24 displayed on the outer tube 13 can be confirmed because it is located outside the body, which is the maximum length that occurs when the volume is reduced by minimizing the diameter of the expansion mechanism (5) Since the display portion 24 is formed at the same distance as L, the portion displayed on the pressurized iron core 12 is moved away from the initial scale of the display portion 24 and moved by a predetermined length L '. As a result, the expansion mechanism 5 also exits the outer tube 13 by the moved length L 'and is located in the blood vessel 50 (see FIGS. 4 and 5).

Therefore, when the operator performs the procedure using the apparatus of the present invention, it is possible to check the part and the complete installation state as much as the expansion mechanism 5 is pulled out of the outer tube 13 from the outside.

As described above, the present invention can be easily and effectively inserted and installed in the lesion site of the body in the state of reducing the volume of the highly elastic expansion mechanism using semi-permanently used shape memory alloy, and also incorrectly installed or the location of the lesion site. In case of incorrect selection, the expansion mechanism can be returned to its original position, thereby providing the effect of achieving ease and perfection of the procedure.

Claims (3)

The flexible outer tube 13, which is a hollow body, is fixed to the working body 14 in which the handle 11 is mounted so that the pressurized iron core 12 fixed at one end can move forward and backward, and closed in the closed state. At one end of the pressurized iron core 12, an expansion mechanism made of a structure in which a flexible moving tube 15 fixed to be moved in accordance with the movement of the pressurized iron core 12 in the outer tube 13 is fixed. 5) In the device for installing, the insertion tube 20 is fixed to the end of the flexible moving tube 15, the end of the insertion tube 20 is embedded into the outer tube (13) The stepped end 22 is fixedly connected to the insertion end 23 of the soft material formed integrally, and the insertion tube 20 of the outer tube 13 at a certain distance from the stepped end 22 of the insertion end 23 Pressing piece 21 having a diameter larger than the diameter of the moving tube 15 to be in close contact with the inner diameter Expansion mechanism insertion device for expanding the constriction of the body, characterized in that the structure is installed. According to claim 1, wherein the position of the pressing piece (21) installed in the insertion tube 20 to minimize the diameter of the expansion mechanism (5) to be used from at least the step (22) of the insertion end (23) Expanding device insertion device for expanding the narrowing part of the body, characterized in that installed at a distance less than the maximum length (L) generated when the volume is reduced. According to claim 1 or 2, the same length (L) by setting the maximum length (L) generated when the volume is reduced by minimizing the diameter of the expansion mechanism (5) to the outer tube (13) Expansion mechanism insertion device for expanding the constriction of the body, characterized in that the display portion 24 having a.