Mechanochemical ablation device for inner vein wall during varicose vein surgery

Abstract

The present invention comprises: a catheter comprising an outer catheter which is inserted into a blood vessel, has a predetermined length, and is made of flexible material, and an inner catheter which is inserted into and slides within the outer catheter; a stimulation body which is inserted into the inner catheter and forms, on the surface of a friction tool formed by spirally twisting and bundling several strands of wire front ends of an elastic material, a stimulation layer that stimulates and damages the inner wall of a vein; an expansion tool which extends in the length direction of the inner catheter so as to protrude from and retract into a distal end of the outer catheter; and a backbone body including a hook which controls movement in the deep-vein direction and is provided on the surface of a cylindrical tube connected to the expansion tool, and including on the inside a therapeutic agent that is absorbed into the human body.

Description

Mechanical and chemical ablation device for the inner wall of veins during lower extremity vein surgery

[0001] The present invention relates to a mechanical chemical ablation device for the inner wall of a vein during lower extremity vein surgery, which shortens the time of vein occlusion and increases the treatment effect by closing the deep venous confluence of the saphenous vein to reduce the risk of recurrence after treatment of varicose veins in the lower extremities due to saphenous vein reflux.

[0002] The veins of healthy legs are equipped with valves that function to ensure that blood supplied from the heart to the lower extremities flows in only one direction, back toward the heart.

[0003] These valves open when blood flows through the veins toward the heart, and close when they try to prevent blood from flowing backward, or venous reflux.

[0004] When veins become weakened and dilated, their valves cannot seal properly, resulting in impaired drainage within the veins, which results in backflow and reduced venous blood flow from the legs.

[0005] Venous reflux is most common within the superficial veins, the largest of which is the great saphenous vein, which runs from the upper part of the foot to the groin, originating from deep veins.

[0006] Depending on the severity, venous reflux may or may not cause visible symptoms.

[0007] Symptomatic cases of venous reflux are at an advanced stage of the disease and may include leg pain and swelling, painful varicose veins, skin changes such as spots or inflammation, and open skin ulcers.

[0008] These symptoms and signs can have a profound impact on the patient's quality of life, so it is recommended that they seek treatment from a specialized medical institution.

[0009] Therefore, treatment of symptomatic venous reflux involves eliminating the reflux at its source, such as the great saphenous vein. Once the affected vein is sealed or removed, the blood is automatically redirected into other veins without any known negative consequences for the patient.

[0010] Current non-invasive methods for treating reflux within the great saphenous vein include sclerotherapy, including radiofrequency (RF) ablation, laser endothermal ablation, and foam sclerotherapy.

[0011] Although foam angioplasty is relatively non-invasive, it has a high rate of recurrence and potential sequelae.

[0012] The purpose of the present invention is to reduce the risk of recurrence after treatment of varicose veins due to reflux of the saphenous vein in an area not treated during treatment of varicose veins.

[0013] The purpose of the present invention is to provide high-quality medical services to patients by shortening the time of vein occlusion during lower extremity vein surgery and increasing the treatment effect.

[0014] The present invention sufficiently achieves its purpose by providing a configuration including a catheter comprising an outer catheter made of a flexible material and having a predetermined length for insertion into a blood vessel, an inner catheter inserted and slid inside the outer catheter, a stimulator having a stimulatory layer formed on a friction surface formed by spirally twisting several ends of an elastic material wire inserted into the inner catheter to stimulate and damage the inner wall of a vein, an extension port extending in the longitudinal direction of the inner catheter that emerges from the tip of the outer catheter, and a back body having a hook provided on the surface of a cylindrical tube connected to the extension port for controlling movement in the direction of a deep vein, and a therapeutic agent to be absorbed into the human body.

[0015] In a configuration in which the purpose of the present invention is achieved, the stimulator is preferably configured such that a stimulating layer that damages the inner wall of a blood vessel is formed on the surface of the wire forming the friction member, and the stimulating layer is formed of a plurality of protrusions.

[0016] In a configuration in which the purpose of the present invention is achieved, it is preferable that the expansion member and the back body are configured such that a spiral groove is formed at the front end of the expansion member and a screw rod is formed protruding at the rear end of the back body.

[0017] In a configuration in which the purpose of the present invention is achieved, it is preferable that the main body is formed by twisting a cylindrical tube with multiple strands of bicryl material, and the therapeutic agent inside the tube is formed of oxidized regenerated cellulose.

[0018] In a configuration in which the purpose of the present invention is achieved, the cylindrical tube is preferably configured such that the tube formed by twisting the bicryl material has elasticity and the surface of the bicryl material located inside is coated or impregnated with oxidized regenerated cellulose.

[0019] The present invention can drastically reduce recurrence after varicose vein treatment by minimizing the area of ​​veins that cannot be treated during varicose vein surgery.

[0020] The present invention has the advantage of dramatically improving the treatment of varicose veins because it provides treatment while minimizing pain to the patient under local anesthesia.

[0021] In addition, the present invention has the advantage of being able to provide the same effect in the treatment of pelvic congestion syndrome due to ovarian venous reflux and in the treatment of varicocele in addition to lower extremity vein surgery.

[0022] Figure 1 is an excerpt of a catheter for venous surgery to which the present invention is applied.

[0023] Figure 2 is an exploded view of a physical stimulator of the inner wall of a vein to which the present invention is applied.

[0024] Figure 3 is a structural diagram of a backbone that induces vascular occlusion to which the present invention is applied.

[0025] Figure 4 is an excerpt of a biker of the white body of the present invention.

[0026] Figure 5 is an assembly cross-sectional view of the main body and inner catheter to which the present invention is applied.

[0027] Figure 1 shows an extract of a catheter for venous surgery to which the present invention is applied.

[0028]

[0029] In order to perform vascular surgery, a catheter (100) with a diameter and a predetermined length that can be inserted into a blood vessel is required.

[0030] In particular, a catheter (100) for performing venous surgery is provided with an outer catheter (110) made of a flexible material that is suitable for insertion into a blood vessel and has a predetermined length that sufficiently reaches the surgical site, and is bent along the shape of the blood vessel when inserted along the blood vessel.

[0031] An inner catheter (120) is provided that is inserted into the inner side of the outer catheter (110) and slides along the inner diameter thereof to approach the distal portion and inject a small amount of venous occlusive material containing any substance into the vein.

[0032] On one side of the catheter (100), a luer lock is formed to which a glue gun is connected, which selectively performs an operation for injecting a small amount of venous occlusive material containing any material into the vein.

[0033]

[0034] Figure 2 shows the disassembly state of a physical stimulator of the inner wall of a vein to which the present invention is applied.

[0035] The ends of several strands of an elastic wire (210) inserted into the inner catheter (120) are twisted into a spiral shape and then bundled together to form a stimulator (200) that forms a friction zone (220).

[0036] And, a stimulation layer (221) is formed on the surface of the clumped friction ball (220) to stimulate and damage the inner wall of the vein, and a plurality of thorns (223) are formed on the surface of the spirally twisted wire (210) forming the stimulation layer (221).

[0037] These friction balls (220) are made of a spirally twisted wire (210) and are elastic.

[0038] At this time, the elasticity is such that it makes close contact with the distal portion while inserted inside the blood vessel, and when the friction member (220) moves in a state of close contact, the thorn (223) causes a large frictional resistance, causing a wound to be created on the inner wall of the blood vessel.

[0039]

[0040] Figure 3 shows the structural state of the backbone that induces vascular occlusion of the inner wall of the vein to which the present invention is applied, and Figure 4 shows an excerpt of the backbone's bicryl state in the present invention.

[0041] The above-mentioned back body (400) is used to treat and close the wound on the inner wall of the blood vessel created by the friction device (220), and a tube (410) is formed by twisting several strands of Vicryl material that is absorbed and disappears in the human body after about 60 days.

[0042] The tube (410) formed by multiple strands is cylindrical and thus has elasticity that allows it to contract and return due to the bicryl material.

[0043] The surface of the bicryl material forming the above-mentioned backbone (400) is impregnated or coated with a therapeutic agent (420) that is absorbed into the human body after 30 days.

[0044] When selecting the above treatment agent (420), oxidized regenerated cellulose is suitable.

[0045] In addition, a screw rod (415) is formed on one side of the tube (410) to transmit manipulation force from the operator, and a hook (412) is formed on the surface of the bicryl material to prevent the main body (400) from moving in the direction of the deep vein during vascular surgery.

[0046]

[0047] Figure 5 shows an assembled cross-sectional state of the main body and inner catheter to which the present invention is applied.

[0048] The back body (400) formed of several strands of bicryl containing a therapeutic agent (420) is configured to be connected to the tip of an inner catheter (120) inserted into the outer catheter (110) while the outer catheter (110) is inserted into the blood vessel to access the distal member during the treatment process.

[0049] In order to insert the above-mentioned back body (400) into the inside of the inner catheter (120), an expansion port (300) is applied, so the expansion port (300) is formed with the same diameter as the diameter of the inner catheter (120) and a predetermined length, so that a spiral groove (310) is formed to connect the back body (400) to the tip.

[0050] Accordingly, the body (400) containing the therapeutic agent (420) has a structure connected to the inner catheter (120), so that it slides in the inner diameter of the outer catheter (110) according to the manipulation of the inner catheter (120) and reaches the treatment location.

[0051] When the selected treatment location is reached, the hook (412) protruding from the surface of the biker material is caught on the inner wall of the blood vessel, preventing it from moving in the direction of the deep vein.

[0052] When the vascular treatment location where the main body (400) cannot move in the direction of heart failure is reached, the expander (300) and the main body (400) are separated by the operator's manipulation, and then the outer catheter (110) and the inner catheter (110) are pulled out of the blood vessel.

[0053] The present invention is used to close the deep venous confluence of the saphenous vein to reduce the risk of recurrence after treatment of lower extremity veins during vascular surgery.

[0054] First, the inner catheter (120) is inserted into the outer catheter (110) of the catheter (100) and treatment is started by inserting it into the lower extremity vein, leaving 2 cm from the confluence of the deep vein of the saphenous vein.

[0055] Leaving 2 cm from the confluence of the deep veins provides the effect of minimizing the remaining area as much as possible compared to the existing method that required leaving 5 cm from the confluence due to the risk of deep vein thrombosis.

[0056] That is, the catheter (110) is positioned 1 cm below the confluence of the cardiac vein and the dilatation port (300) is removed.

[0057] Afterwards, the body (400) containing the therapeutic agent is inserted into the inner catheter (120) and reaches the tip of the outer catheter (110).

[0058] Afterwards, the outer catheter (110) is pulled out about 10 cm so that the tip of the inner catheter (120) is exposed at the location where the tip of the outer catheter (110) was.

[0059] While holding the extension port (300), pull the inner catheter (120) so that it is pulled out about 3 cm.

[0060] The back body (400) is exposed by the pulling motion of the inner catheter (120).

[0061] The operator uses an ultrasound detector to check whether the tube (410) of the back body (400) is in the correct position, and if it is in the correct position, the inner catheter (120) is completely removed from the blood vessel.

[0062] In the above exaggeration, it is natural that the external catheter (110) must also be completely removed from the blood vessel.

[0063] Through the above-described procedure, the oxidized regenerated cellulose component impregnated or applied to the biker material of the back body (400) is absorbed into the human body and closed to minimize the gap in the remaining area of ​​the junction where there is a risk of deep vein thrombosis.

Claims

1. An external catheter made of a flexible material and having a predetermined length that is inserted into a blood vessel; A catheter comprising an inner catheter that is inserted and slid into the outer catheter; A stimulator that forms a stimulating layer on the friction surface by twisting several ends of an elastic wire inserted into the inner catheter in a spiral shape to stimulate and damage the inner wall of the vein; An extension port extending in the longitudinal direction of the inner catheter that emerges from the tip of the outer catheter; and A mechanical chemical ablation device for the inner wall of a vein during lower extremity vein surgery, comprising a back body having a hook for controlling movement in the direction of a deep vein on the surface of a cylindrical tube connected to the above-mentioned expansion port and a therapeutic agent absorbed into the human body inside.

2. In paragraph 1, The above stimuli are, A mechanical chemical resection device for the inner wall of a vein during lower extremity vein surgery, characterized in that a stimulation layer that damages the inner wall of a blood vessel is formed on the surface of a wire forming the friction zone, and the stimulation layer is formed with a plurality of protrusions.

3. In paragraph 1, The above extension and the above back body, A mechanical chemical resection device for the inner wall of a vein during lower extremity vein surgery, characterized in that a spiral groove is formed at the tip of the above-mentioned expansion port and a screw rod is formed protruding at the rear end of the above-mentioned main body.

4. In paragraph 1, The above white body is, The cylindrical tube is made by twisting several strands of bicryl material, A mechanical chemical resection device for the inner wall of a vein during varicose vein surgery, characterized in that the therapeutic agent inside the tube is oxidized regenerative cellulose.

5. In paragraph 4, The above cylindrical tube, A mechanical and chemical resection device for the inner wall of a vein during varicose vein surgery, characterized in that the tube formed by twisting the above-mentioned bicrylic material is provided with elasticity and the surface of the bicrylic material located inside is coated or impregnated with oxidized regenerative cellulose.

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