KR20180033979A - Inferior venal cava filter and surgical procedure kit for percutaneous insertion of inferior vena cava filter having the same - Google Patents

Abstract

The present invention relates to an inferior vena cava filter and a surgical procedure kit for installing an inferior vena cava filter comprising the same wherein, more specifically, the inferior vena cava filter can filter blood clots while the same is placed on a predetermined location of inferior vena cava to temporarily prevent the formation of pulmonary emboli. According to the present invention, the surgical procedure kit for installing an inferior vena cava filter comprises: an inferior vena cava filter which filters blood clots, flowing in a relevant blood vessel, while the same is inserted and placed in the blood vessel; and a catheter which is inserted in the blood vessel, while the same accommodates the inferior vena cava filter therein, and is used as a relevant tool to place the inferior vena cava filter in a predetermined location in the blood vessel or to remove the inferior vena cava filter afterwards. The inferior vena cava filter comprises: a blood clot capturing unit which is formed in the shape of a spiral cone by making one strand of iron wire into a three-dimensional shape and thus captures blood clots, flowing in a relevant blood vessel; and a tool joining head unit which is integrally formed on an upper end tip of the blood clot capturing unit and enables a relevant tool, used for installing the inferior vena cava, to be joined and operated.

Description

TECHNICAL FIELD [0001] The present invention relates to an inferior vena cava filter and an inferior vein filter having the same. [0001] The present invention relates to an inferior vena cava filter,

The present invention relates to an inferior vein filter and an operation kit for an inferior vein filter installation using the same. More particularly, the present invention relates to an inferior vena cava (IVF) filter having an inferior vena cava (IVF) The present invention relates to an inferior vena cava (IVF) filter for filtering blood clots in a state in which a blood vessel is filtered and an inferior vein filter equipped with the same.

Venous thromboembolism is a disease that involves deep vein thrombosis and pulmonary thromboembolism. It occurs in 422 people in 100,000 people in 2006 in the United States. Is a serious disease with high morbidity and mortality.

In particular, hospitalized patients are at increased risk due to limited movement and unstable hemodynamic status compared to healthy individuals. In patients with venous thromboembolic complaints, it usually complains of edema (edema) and pain or chest pain (chest pain) in the lower extremities but may be found incidentally without symptoms.

Anticoagulant (anticoagulant) is the most preferred method to prevent venous thromboembolism. Bleeding is a low complication (less than 5%) due to the use of anticoagulants.

However, the prevalence of pulmonary embolism is still high after appropriate anticoagulant treatment, and the use of inferior vena cava filter (IVC filter) for prevention or treatment with anticoagulant therapy is continuously increasing.

On the other hand, the indications for the establishment of the inferior vena cava filter to prevent pulmonary embolism are largely divided into absolute, relative, and preventive purposes. The absolute indications are anticoagulants such as cerebral hemorrhage or active intestinal bleeding In cases of absolute contraindication of use, failure of anticoagulant therapy, severe complications due to anticoagulant therapy, and relative indications of increased or increased thrombosis, the possibility of pulmonary embolism alone with anticoagulant therapy alone If it is judged to be high, the patient with decreased cardiopulmonary function, or when pulmonary embolism frequently recurs.

In addition, if the patient does not have deep vein thrombosis or pulmonary embolism, the above-mentioned inferior vein filter should be installed for the purpose of preventing trauma, major surgery, or limited long-term movement.

However, since most of the inferior vein filters generally used up to now are formed into a conical shape of an umbrella body structure by using a plurality of iron wires, the respective iron wires can be folded or unfolded before or during the procedure, The sharp edges may damage the blood vessels, causing complications such as hemorrhage, and adhering to the blood vessels with the blood vessels being embedded in the inner wall of the blood vessels, making the removal of the subsequent filters inevitable.

In order to prevent such a problem, Korean Patent Laid-Open Publication No. 10-2014-0023294 discloses an absorbable blood vessel filter disposed in a blood vessel for temporary filtration of body fluid. However, as shown in FIG. 1, 900 is also in the form of a conical line, and when the circumferential support 920 extending to the lower side of the acquisition basket 910 continues to contact the inner wall of the blood vessel, (Fibrosis) tend to occur, and as a result, the filter 900 is difficult to remove even after a certain period of time due to adhesion with blood vessels.

In addition, since the circumferential support 920 is inflatable, the degree of shape deformation that reduces the volume is insignificant due to the structural characteristic that is completed by braiding, braiding, or weaving, Therefore, it is difficult to insert the filter 900 into the blood vessel. Therefore, when the position of the filter 900 is re-adjusted during the procedure or if the operator is mistakenly in contact with the blood vessel, serious complications such as vascular puncture .

Korean Patent Publication No. 10-2014-0023294 (Published date: 2014. 02. 26.)

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems, and it is an object of the present invention to provide a thrombus capturing part having a spiral conical shape by the implementation of a three-dimensional shape using one strand of wire, In addition, it is an object of the present invention to provide an inferior vena cava filter capable of minimizing vascular adhesion during intravascular insertion.

It is another object of the present invention to provide a shape memory alloy material capable of deforming the shape of the thrombus capture part and restoring the shape of the thrombus to a circular shape and increasing the flexibility of the intravascular insertion by reducing the volume of the thrombus capture part through shape deformation, And to provide an inferior vena cava filter which can minimize the damage of the blood vessel in the following process and can easily remove the filter in the future.

It is still another object of the present invention to provide a catheter that is a device that is indispensable in inserting and introducing the inferior vein filter into a vein (inferior vein), wherein a marker is attached to the tip of the catheter, An inferior vena cava filter for facilitating the determination of the position of the catheter for position determination, and an operation kit for an operation for installing an inferior vein filter including the same.

According to an aspect of the present invention, there is provided an under-vein filter for filtering blood clots flowing along a blood vessel while being inserted into a blood vessel. And a catheter which is an associated device for use in introducing the inferior vena cava filter into a predetermined position in a blood vessel after being inserted into a blood vessel in a state in which the inferior vena cava filter is internally accommodated or for removing the inferior vein filter in the future The lower vein filter includes a thrombus capture part for collecting a thrombus flowing along the blood vessel when the blood vessel is introduced into the blood vessel by forming a spiral conical shape through the implementation of a three-dimensional shape using one strand of wire, And a mechanism binding head unit formed integrally with the lower vein filter to enable connection operation of an associated instrument used in the installation of the lower vein filter.

In addition, the catheter is a tubular body having a predetermined length, and a marker for determining the position when the inferior vein filter is inserted into the blood vessel and adhered to the defined position is further provided Respectively.

In addition, the inferior vein filter extends from the mechanism binding head and has a ring shape having a predetermined diameter through the implementation of a three-dimensional shape using a single strand of wire. Thus, , And a filter balance holding portion for restricting the instrument binding head to be positioned at the center of the blood vessel without being biased in any one direction by abutting against the inner wall surface of the blood vessel.

The lower end of the thrombus capture part is bent inward to prevent the distal end from digging the inner wall of the blood vessel when it comes into contact with the inner wall of the blood vessel.

In addition, a first adhesion inhibiting tube for minimizing blood vessel adhesion in the case of abutting against the inner wall of the blood vessel is coated on the lower side of the thrombus capture part, respectively.

The wire is made of Nitinol, which is a shape memory alloy.

In addition, at the end of the filter balance maintaining portion, a second inward end is bent inward to prevent the distal end from digging into the blood vessel when it comes into contact with the inner wall of the blood vessel.

In addition, a second adhesion inhibiting tube for minimizing blood vessel adhesion in the case of abutting against the inner wall of the blood vessel is coated on the entire region of the filter balance maintaining portion.

As can be clearly understood from the above description, the operation of the inferior vein filter according to the present invention and the inferior vein filter installation operation kit including the same according to the present invention are characterized in that the thrombus capturing part for filtering out the thrombus takes the form of a helical cone, In addition to preventing the same vascular injury, it is possible to suppress the vascular adhesion as much as possible. Therefore, the treatment effect of the inferior vein filter can be enhanced and the inhibitory effect of the complication can be lowered.

In addition, since the shape deformation and the shape restoration of the thrombus capturing part made of Nitinol (Ni-Ti), which is a shape memory alloy, are possible, the filter accommodation into the catheter through volume reduction, It is possible to achieve both convenience of operation and stability of the operation such as repositioning of the filter position and removal of the filter in the future.

At the same time, it is possible to greatly improve the probability of success in the installation of the lower limb vein filter for the temporary prevention of venous thromboembolism by attaining various effects as described above. Thus, along with the development of related medical technology, It is a very useful invention that can greatly contribute to the establishment and development of technical development based on this.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of an absorbable blood vessel filter according to the prior art; FIG.
FIG. 2 is a perspective view showing a configuration of an inferior vein filter according to the present invention. FIG.
3 is a cross-sectional view showing a configuration of a catheter according to the present invention;
FIGS. 4A to 4F are views showing steps of a procedure of installing an inferior vein filter according to the present invention.
5 is a perspective view showing another embodiment of an inferior vein filter according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. First, in adding reference numerals to the constituents of the drawings, it is to be noted that the same constituents are denoted by the same reference numerals as much as possible even if they are displayed on different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

3 is a cross-sectional view showing a configuration of a catheter according to the present invention, and Figs. 4A to 4F are cross-sectional views illustrating an inferior vein filter according to the present invention. Fig. FIG. 8 is an exemplary view showing a stepwise process of installation.

As shown in FIGS. 2 and 3, the inferior vein filter according to the present invention and an operation kit for an inferior vein filter installation operation including the same include an inferior vein filter inserted and retracted into the inferior vein, which is the main vein of the venous system, (1), which is inserted into the blood vessel in a state in which the inferior vein filter (1) is internally accommodated, and then placed in a predetermined position in the blood vessel, And a catheter 2 which is an additional surgical tool used to introduce the inferior vein filter 1 or to remove the inferior vein filter 1 in the future.

The IVC filter 1 is a means for filtering blood clots flowing along the inferior vein (hereinafter, referred to as "blood vessel"). The IVC filter 1 forms a spiral conical shape through the implementation of a three- A thrombus capture part 11 for collecting a thrombus that flows along the blood vessel when the blood vessel is caught in the blood vessel capture part 11 and an upper corner of the thrombus capture part 11, And a mechanism binding head 12 for making a connection operation of an associated mechanism (additional operation tool) used in the apparatus.

Here, the material of the wire for realizing the shape of the thrombus capture part 11 can be easily deformed by an external force when a geometric shape is formed, but can be restored to its original shape when an external force is lost Nitinol, which is a shape memory alloy, is used as its material.

A first inwardly bent first end 111 is formed at the lower end of the thrombus capture unit 11 so that the tip of the lowermost spiral having the maximum diameter does not penetrate the inner wall of the blood vessel. .

In addition, a hooking groove 121 is formed in the instrument coupling head 12 so that a separate snare, which is one of the related mechanisms used in the installation of the inferior vein filter, is attached to remove the filter adhered to the inside of the blood vessel. The other one of the related devices used for the installation of the inferior vein filter necessary for inserting the filter into the blood vessel or resetting the retracted position or removing the filter already taken in the blood vessel, And a female screw hole 122 is formed inwardly at the upper end so as to enable the corresponding fastening of the male screw thread formed at the tip end.

In addition, a first adhesion suppressing tube 112 for preventing vascular adhesion to the utmost is provided at a lower end of the blood thrombus capture unit 11, which is in contact with the inner wall surface of the blood vessel when the filter is inserted into the blood vessel, , Coated).

Here, the first adhesion suppressing tube 112 has flexibility capable of responding to the deformation of the thrombus capture portion 11, and is made of a material harmless to the human body such as silicone widely known as a material of an alternative implant. . In addition, it may be provided in various forms such as a tube or a film, and its configuration may be omitted according to a procedure condition.

The catheter 2 is an additional treatment tool necessary for installing the inferior vein filter using the inferior vein filter 1. The inferior vein filter 1 is pulled in both directions and deformed into a shape similar to a linear shape It is a pipe (pipe) with a length enough to accommodate the intrinsic value even if it hangs long.

In addition, a marker 21 for position identification is provided at the distal end in the direction in which the lower vein filter 1 advances. This is for the purpose of position determination and position selection when the inferior vein filter 1 is inserted into a blood vessel and the blood vessel is adhered to a defined position.

FIG. 5 is a perspective view illustrating another embodiment of an inferior vein filter according to the present invention. FIG. 5 is a perspective view illustrating an inferior vein filter according to another embodiment of the present invention. It is possible to keep it in a state of being in a state of being.

To this end, as shown in FIG. 5, a ring (not shown) extending from the mechanism binding head 12 and having a predetermined diameter through the implementation of a three-dimensional shape using a single strand of wire similar to the thrombus capture portion 11 ring shape, and further includes a filter balance holding portion (13) that is held in contact with the inner wall surface of the blood vessel when the filter is held in the blood vessel so that the mechanism binding head portion (12) do.

The material of the wire for realizing the shape of the filter balance holding part 13 can be easily deformed by an external force when the geometric shape is formed like the thrombus capture part 11 described above But it is preferable to use nitinol which is a shape memory alloy exhibiting a property of being restored to its original shape when an external force is lost.

Similarly to the first inwardly directed tip 111, an end of the inwardly bent second inwardly bent tip end portion of the filter balance maintaining portion 13 is bent inwardly in order to prevent the tip end of the inwardly bent blood vessel wall from colliding with the inner wall of the blood vessel. (131) is formed.

In addition, the second adhesion inhibiting tube 132 may be coated on the entire region of the filter balance maintaining portion 13 that is in contact with the inner wall surface of the blood vessel when the filter is inserted into the blood vessel.

(T) is the thrombus that flows along the inferior vein, and (810) and (820) are the additional vessels used in the preparation of the inferior vein filter And the lasso.

The operation of the inferior vein filter according to the present invention constructed as described above and the operation kit for the inferior vein filter installation operation including the same will be described in detail as follows.

First, in order to temporarily prevent pulmonary embolism, an inferior vein filter 1 of the present invention is inserted into a blood vessel (b, an inferior vein) to filter blood clots. There are many related organizations that are needed.

That is, in order to insert the inferior vein filter 1 into the blood vessel, a connecting wire 810 is used as an associated mechanism together with the catheter 2, and then the inferior vein filter 1 is removed from the blood vessel In addition to the connection wire 810, the snare 820 is further used as an associated mechanism.

4A, the inferior vein filter 1 according to the present invention is inserted into the blood vessel using the above-described related mechanism. First, as shown in FIG. 4A, The thrombus capturing portion 11 of the filter 1 is pulled out to deform the shape so as to have a shape similar to a linear shape so that the inferior vena cava filter 1 can be accommodated in the catheter 2 Screw thread formed on the distal end of the connecting wire 810 is fastened to the female screw hole 122 of the mechanism connecting head 12 so that the connecting wire 12 and the connecting wire 810 are integrated The inferior vein filter 1 can be easily inserted into and introduced into the blood vessel using the connecting wire 810.

4B, the catheter 2 in which the inferior vein filter 1 is housed is inserted into the blood vessel b and is held at a predetermined position. As shown in Fig. 4C, It is possible to retreat the catheter 2 in a state of being firmly fixed to the connecting wire 810.

At this time, whether or not the inferior vein filter 1 has reached the predetermined position can be easily grasped together with confirmation of the insertion position of the catheter 2 by determining the position of the marker 21 provided at the distal end of the catheter 2.

Subsequently, when the catheter 2 is withdrawn and the inferior vein filter 1 is withdrawn from the catheter 2, as shown in Fig. 4 (d), the thrombus capture portion 11 is formed into an original helical conical shape So that the thrombus t flowing along the blood vessel b can be filtered out.

Finally, as shown in FIG. 4E, when the insertion of the inferior vein filter 1 is completed at a predetermined position in the blood vessel b as described above, the connecting wire 810 is inserted into the mechanism binding head 1, (12), it is possible to finish the installation of the inferior vena cava filter.

On the other hand, at the end of the temporary prevention of pulmonary embolism through the installation of the inferior vein filter, the inferior vein filter 1 held inside the blood vessel b is removed. As shown in FIG. 4F, And the connecting wire 810 is formed integrally with the tool binding head 12 and the connecting wire 810 in a state where the connecting wire 810 is firmly fixed to the female screw hole 122 of the apparatus binding head 12, The catheter 2 is inserted again into the blood vessel b so that the inferior vein filter 1 is internally accommodated.

Thereafter, the snare 820 is hooked on the hooking groove 121 formed on a part of the circumferential surface of the instrument binding head portion 12, and then the lower vein vein filter 1 (1) separated from the blood vessel b by the catheter 2 Can be easily taken out and removed by using the snare 820.

To summarize, an inferior vein filter according to the present invention and an inferior vein filter insertion operation kit for inserting the inferior vein filter 1 for filtering a blood clot flowing along a vein, The effect of facilitating the operation of the filter installation technique can be obtained, and the process of removing and removing from the inside of the blood vessel can be facilitated.

In addition, it is possible to minimize the vascular injury and vascular adhesion during the operation of installing the inferior vein filter as described above, thereby maximizing the success probability and the therapeutic effect of the inferior vein filter installation, It is possible to prevent the occurrence of complications such as hemorrhage due to vascular injury to the utmost.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as defined by the appended claims. will be. Therefore, the embodiments disclosed in the present invention and the accompanying drawings are intended to illustrate and not to limit the technical spirit of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments and the accompanying drawings . The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of the claims should be construed as being included in the scope of the present invention.

1: inferior vein filter, 2: catheter, 11: thrombus capture part
12: Mechanism binding head part, 13: Filter balance maintaining part, 21: Marker
111: first inward end, 112, first adhesion inhibiting tube, 121:
122: female screw hole, 131: second inward end, 132: second adhesion inhibiting tube

Claims (8)

An inferior vein filter for filtering thrombus flowing along the blood vessel while being inserted into the blood vessel; And
And a catheter, which is an associated device used for introducing the inferior vein filter into a predetermined position in the blood vessel after insertion into the blood vessel, or for removing the inferior vein filter in the state where the inferior vein filter is internally accommodated,
The lower vein filter includes a thrombus capture part for collecting a thrombus flowing along the blood vessel when the blood vessel is introduced into a spiral conical shape through the implementation of a three-dimensional shape using one strand of wire, And a mechanism binding head which is integrally formed to allow a connection operation of a related apparatus used for installing an inferior vena cava filter.
The method according to claim 1,
The catheter is a tubular body having a predetermined length,
Further comprising a marker for determining a position when the inferior vein filter is inserted into the blood vessel and the blood vessel is adhered to a defined position, at a distal end in the direction in which the inferior vein filter is advanced.
The method according to claim 1,
The lower vein filter has a ring shape having a predetermined diameter through the implementation of a three-dimensional shape extending from the mechanism binding head portion and using a single strand of wire,
Further comprising a filter balance retaining portion that rests on the inner wall surface of the blood vessel so as to be positioned at the center of the blood vessel without being biased in any one direction by being abutted against the inner wall surface of the blood vessel when the insertion of the inferior vein filter is performed. Intravenous filter installation.
The method according to claim 1,
Wherein a first inward tip is bent inward to prevent the distal end from digging the inner wall of the blood vessel when the inner wall of the blood vessel catching portion comes into contact with the inner wall of the blood vessel.
The method according to claim 1,
And a first adhesion inhibiting tube for minimizing blood vessel adhesion when the blood vessel is in contact with an inner wall of the blood vessel is coated on a lower side of the thrombus capture unit.
4. The method according to any one of claims 1 to 3,
Wherein the wire is made of Nitinol, which is a shape memory alloy.
The method of claim 3,
Wherein a second inward end of the filter balance maintaining portion is bent inward to prevent the tip of the filter balance holder from digging into the blood vessel when it comes into contact with the inner wall of the blood vessel.
The method of claim 3,
And a second adhesion inhibiting tube for minimizing blood vessel adhesion when the blood vessel is in contact with the inner wall of the blood vessel is coated on the entire region of the filter balance maintaining portion.

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