RU218103U1 - VASCULAR OCCLUSION DEVICE - Google Patents

Abstract

The utility model relates to medicine, in particular to vascular surgery, and can be used to close the lumen of a vessel. The vessel occlusion device is made in the form of two, located on the same axis and interconnected at the vertices, cones made of wire elements forming cells. The device is provided with a membrane of elastic blood-tight material installed between the cones, having a diameter greater than the maximum diameter of the cones and made with the ability to cover the surface of one of the cones under the action of blood flow. The device contains a cannula, made with the possibility of passing through it a conductor with a diameter of not more than 0.35 mm, installed at the junction of the cones and passing from the cavity of one cone to the cavity of another. The technical result consists in providing high-quality, effective occlusion due to the precise placement of the device for occlusion in vessels and anatomical areas with complex geometry. 4 w.p. f-ly, 1 ill.

Description

Technical field

The utility model relates to medicine, in particular to vascular surgery, and can be used to close the lumen of a vessel.

State of the art

Various devices for artificial occlusion of the vascular bed for therapeutic purposes are known from the prior art. In particular, intravascular occlusive devices are known for selectively closing a vessel anywhere in the body's circulatory system where it is desired to shut off blood flow. Typically, these devices are suitable for delivery through a catheter to a remote location in a patient's vasculature.

Known occluder to block the lumen of the vessel, made in the form of a tubular structure with proximal and distal ends, which is configured for compression in the folded state for delivery to the target area of the vessel and return to the open configuration inside the target area, while the tubular structure is made in the form of a balloon-expandable a stent with a narrowed section at the distal end in an open configuration, while inside the stent there is a tube of sealing material fixed on the beams of the stent frame along the perimeter of the proximal edge and immediately in front of the narrowed section at the distal end, and the free section of the tube of sealing material is tucked inside said tube in the direction of the proximal end of the stent frame relative to the place of fixation at the distal end of the stent frame (RU 206863 U1, 09/30/2021).

The closest technical solution is a device for occlusion of blood vessels, made of wire elements forming cells, in the form of a body of rotation of a conical or cylindrical shape, or in the form of two conical bodies of rotation, while the device is equipped with a membrane of elastic blood-tight material installed coaxially with the body of rotation and having a diameter equal to or greater than the maximum diameter of the body of rotation, while in the case of a device in the form of a single body of rotation, the membrane is located at one of the ends of the bodies of rotation, and when the device is made in the form of two bodies of rotation - between them (RU 2071792 C1, 20.01. 1997).

The disadvantages of these devices is the possibility of low-quality, inefficient occlusion, especially in vessels and anatomical areas with complex geometry.

Thus, the main technical problem, the solution of which is provided by the implementation and use of the claimed utility model, and which could not be solved by the implementation or use of analogues of the utility model, is the possibility of poor-quality, inefficient occlusion in vessels and anatomical zones with complex geometry.

Utility Model Disclosure

The technical result provided by the claimed utility model in solving the above technical problem is to ensure high-quality, effective occlusion due to the precise placement of the occlusion device in vessels and anatomical areas with complex geometry.

The above problem is solved, and the technical result is provided by the proposed device for vascular occlusion, made in the form of two, located on the same axis and interconnected at the vertices, cones of wire elements forming cells, equipped with a membrane of elastic blood-tight material installed between the cones, having a diameter greater than the maximum diameter of the cones and made with the ability to cover the surface of one of the cones under the action of blood flow, and containing a cannula made with the possibility of passing through it a conductor with a diameter of not more than 0.35 mm, installed at the junction of the cones and passing from the cavity of one cone into the cavity another. In this case, the cannula is soldered to the wire elements at the junction of the cones and has a length of not more than 10 mm, an outer diameter of not more than 1 mm, an inner diameter of not less than 0.35 mm. The elastic blood-tight material is ePTFE or non-woven polyurethane. Wire elements are made of Nitinol or Elgiloy®.

This design makes it possible to ensure reliable and complete obturation of the vessel lumen, to use the device for occlusion of vessels of any geometry, anatomical zones and any diameters, as well as to carry out a complete and reliable self-fixation of the device.

Brief description of the drawings

The structure of the device is shown in Fig. 1 (a, b, c).

Implementation of the utility model

The device for occlusion of blood vessels is made in the form of two cones 1 located on the same axis and interconnected at the tops, i.e. essentially in the form of a double cone, consisting of two parts symmetrical with respect to the top (https://ru.wikipedia.org/wiki/Cone). The cones 1 are made of wire elements 2 forming cells 3. The wire elements 2 can be made of either Nitinol or Elgiloy®, which allows the device to expand when pushed out of the delivery system and lock into place in the desired segment of the vessel. To improve the fixation of the base of the cones 1 can be equipped with special pins or hooks 6.

To block the flow of blood, the device is provided with a membrane 4 made of an elastic blood-tight material such as ePTFE (expanded polytetrafluoroethylene) or non-woven polyurethane. Membrane 4 is installed between the cones 1 and has a diameter greater than the maximum diameter of the cones 4 and is configured to cover the surface of one of the cones 1 under the action of blood flow.

In addition, the device for vascular occlusion contains a cannula 5, made with the possibility of passing through it a conductor with a diameter of not more than 0.35 mm (not shown in the drawing). Cannula 5 is installed at the junction of the cones 1 and passes from the cavity of one cone 1 into the cavity of another. The cannula 5 is fixed to the wire elements 2 of the device by soldering or welding. In this case, the cannula 5 has a length of no more than 10 mm, an outer diameter of no more than 1 mm, and an inner diameter of no less than 0.35 mm, which allow the device to be carried in the delivery system along the conductor to its destination, and do not affect the rigidity of the device, on the ability of its reliable installation at the destination, and do not allow the cannula 5 to pass blood from the cavity of one cone 1 into the cavity of another cone 1.

The operation of the device is as follows

After puncture of the femoral or radial artery or vein, the target (intended for closure-occlusion) artery or vein is catheterized and a conductor with a diameter of not more than 0.35 mm is passed distally, and then the proximal end of the conductor is placed inside the cannula 5 of the device. In this case, the device for occlusion of blood vessels in the form of two cones 1 located on the same axis and interconnected by their vertices, due to the presence of wire elements 2 forming cells 3, is pulled into a straight line and placed in a special flexible delivery system (not shown in the figure). shown), with a diameter of not more than 2.5 mm. The delivery catheter is then passed along the guidewire into the target vessel and the device is pushed out of the catheter.

The device completely obturates the lumen of the vessel due to the presence of a blood-tight elastic membrane 4, which is securely fixed between the cones 1.

The membrane 4, located between the cones 1, with the help of blood flow (pressure gradient) covers the conical surface of the distally located cone 1 and blocks the blood flow, instantly occluding the lumen of the vessel. With the use of such a membrane 4, the versatility of the device is achieved for its use in vessels (arteries, veins) of various anatomical zones, geometries and sizes (for example, an open Botal duct). In this case, the device is reliably self-fixed in the vessel due to the presence of self-expanding cones 1 (the diameter of which exceeds the diameter of the vessel), and additionally due to special pins 6.

Due to the presence of a flexible delivery system, its small diameter (no more than 2.5 mm), low trauma is achieved both at the site of the puncture hole and at the implantation site and the possibility of implanting the device in vessels of various diameters, geometry and anatomical zones.

Such a device can be used for occlusion of the main arteries and veins of any localization.

Claims (5)

1. A device for occlusion of blood vessels, made in the form of two cones located on the same axis and interconnected at the vertices, made of wire elements forming cells, and equipped with a membrane of elastic blood-tight material installed between the cones, having a diameter greater than the maximum diameter of the cones and made with the ability to cover the surface of one of the cones under the action of blood flow, characterized in that it contains a cannula made with the possibility of passing through it a conductor with a diameter of not more than 0.35 mm, installed at the junction of the cones and passing from the cavity of one cone to the cavity of another. 2. The device according to claim. 1, in which the cannula is soldered to the wire elements at the junction of the cones. 3. The device according to any one of paragraphs. 1, 2, in which the cannula has a length of not more than 10 mm, an outer diameter of not more than 1 mm and an inner diameter of not less than 0.35 mm. 4. The device according to any one of paragraphs. 1-3, in which the elastic blood-tight material is ePTFE or non-woven polyurethane. 5. The device according to any one of paragraphs. 1-4, in which the wire elements are made of Nitinol or Elgiloy®.

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