RU225238U1 - Device for ultrasonic obliteration of saphenous veins of the lower extremities - Google Patents

Abstract

The utility model relates to medical equipment and can be used in phlebology for the treatment of varicose veins of the lower extremities. The device contains an ultrasonic vibration generator and a device in the form of a syringe for supplying a sclerosant solution through the tip of the catheter to the vein wall. The device operates as follows: a catheter with an ellipsoid-shaped tip is inserted into the lumen of the vein. Due to ultrasonic vibrations of the tip onto the vein wall and the supply of sclerosant solution through the channel in the tip to the vein wall, structural changes in the venous wall occur, which leads to the closure of the vein lumen with the formation of necrotic tissue and the exclusion of the vein from the bloodstream.

Description

Technical field

The utility model relates to medical equipment and can be used in phlebology for the treatment of varicose veins of the lower extremities.

State of the art

From the prior art, devices are known that act on the saphenous veins of the lower extremities through thermal, chemical, mechanical and combined effects.

A known analogue is a device for laser obliteration of the saphenous veins of the lower extremities [1]. The disadvantage of this device is the uneven thermal damage to the venous wall by laser radiation, which can lead to recanalization and recurrence of the disease.

A known analogue is a device for radiofrequency obliteration of the saphenous veins of the lower extremities [2]. The disadvantage of this device is the possibility of perforation of the vascular wall due to high temperatures of radiofrequency exposure.

A known analogue is a device for chemical obliteration of the saphenous veins of the lower extremities [3]. The disadvantage of this device is the difficulty in determining the required dose of sclerosant, and therefore the effect may be ineffective if the dose is too small, or lead to chemical damage to surrounding tissues if the dose is too large.

A known analogue is a device for mechano-chemical obliteration of the saphenous veins of the lower extremities [4]. The disadvantage of this device is the presence of a pointed rotating element that causes direct mechanical injury to the vascular wall.

The prototype of this utility model is a patent for an invention [5].

Disclosure of the essence of the utility model

The essence of the utility model is the creation of a device that carries out the combined effect of ultrasound and a solution of a medicinal substance on the venous wall.

Brief description of drawings

In FIG. 1 shows an embodiment of the device.

In the tubular housing 1, connected to the handle 2, there is an emitter of the ultrasonic vibration generator 3, in the form of a piezoelectric transducer 4, mounted in the housing 1 on elastic spacers 5. Elastic spacers 5 reduce the transmission of ultrasonic vibrations from the transducer 4 to the housing 1 and handle 2. Transducer 4 transmits ultrasonic vibrations to the catheter 6 connected to it. The catheter 6 has a tip 7 in the shape of an ellipsoid for contact with the walls of the vein. The supply voltage to the converter 4 is supplied from the voltage converter 8. The supply voltage to the converter 4 is supplied from the voltage converter 8, through wires 9, 10. In this embodiment, an external power source is used, for example, an electrical network and the current is supplied through the network wire 11, from external electrical network. Wire 9 is connected to voltage converter 8, and wire 10 is connected to voltage converter 8, through contacts 12, 13. Contact plate 14 is pressed against the inner surface of the handle shell 2 by spring 15. Spring 15 exerts a compressive force, and contact plate 14 is not pressed against contacts 12, 13 and the electrical circuit is open. When you press plate 16, the force exerted on plate 16 is transmitted through rod 17 to plate 14. Plate 14 closes contacts 12, 13 and the electrical circuit supplying power to voltage converter 8 will be closed. Converter 8 converts voltage from a current source, in this embodiment, an external electrical network, into electrical impulses to generate mechanical ultrasonic vibrations in transducer 4. Ultrasonic vibrations are transmitted to catheter 6 connected to transducer 4. Catheter 6 is removable and connected to transducer 4 using a threaded connection 18. The catheter 6 exits the body 1 through the hole 19. The tip of the catheter 6, made in the form of an ellipsoid in direct contact with the walls of the vein, has a channel 20, with an entrance through a conical nozzle 21. An elastic tube 22 is attached to the nozzle 21 , connected to the sub-needle cone 23 of the syringe 24, mounted on a bar 25 connecting the handle 2 to the body 1, by means of holders 26. When you press the stop of the rod 27, the rod 28 transmits forces to the piston 29 and the sclerosant solution 30 located inside the syringe. The sclerosant is supplied along tube 22 into the channel 20 of the catheter 6 and exits through the tip 7, in contact with the walls of the vein, simultaneously with the effect of ultrasound on the walls of the vein from the transducer 4. By sclerosant we mean any known drug for phlebosclerosis of veins, for example, [6, 7].

In FIG. 2 shows a variant of connecting the catheter 6 with the transducer 4 using a threaded connection 18.

Any ultrasonic installation is a complex consisting of one or more ultrasonic generators designed to convert industrial-frequency current energy into high-frequency current energy, ultrasonic transducers that convert high-frequency current energy into mechanical vibration energy, and a technological device in which the mechanical vibration energy actively influences the processed object [8].

In this embodiment, the complex in the form of a generator of ultrasonic mechanical vibrations is understood as a converter 8, designed to convert the energy of industrial frequency current, in this embodiment, the network current, into high-frequency current energy; an ultrasonic transducer 4 that converts high-frequency current energy into the energy of mechanical vibrations and a technological device in the form of a catheter 6, through which the energy of mechanical vibrations actively affects the object being processed, in this embodiment, the vein wall.

As an ultrasonic transducer 4 that converts high-frequency current energy into the energy of mechanical vibrations, it is possible to use any known transducer, for example, a Langevin emitter.

Carrying out the invention

The device operates as follows: a catheter with an ellipsoidal tip is inserted into the lumen of the vein. Due to the combined effect of ultrasonic vibrations and the supply of a sclerosant solution to the vein wall, structural changes in the venous wall occur, which leads to the closure of the vein lumen with the formation of necrotic tissue and the exclusion of the vein from the bloodstream.

Information sources:

1. Endoluminal laser ablation device and method for treating veins, EP 2974687 A1.

2. Method of improved vein closure US 8214052 B2.

3. Therapeutic foam US 8703827 B2.

4. Vascular treatment device US 7967834 B2.

5. RU 2214193.

6. Ivanov E.B., Zolotukhin I.A. Preparations for phlebosclerosis: effectiveness, adverse reactions, complications. Phlebology. 2010; 4(2):36-41.

7. Baeshko A.A., Shestak N.G., Tikhon S.N., Miklevich A.V., Markautsan P.V., Vartanyan V.F., Dechko E.M., Kovalevich K.M., Yushkevich A.V. Belarusian State Medical University, Minsk, Belarus Drugs used in modern sclerotherapy of veins and their side effects. 2012

8. Donskoy A.V., Ultrasonic electrotechnological installations. Energoizdat 1982.

Claims (1)

A device for ultrasonic obliteration of the saphenous veins of the lower extremities, including an ultrasonic vibration generator emitter located in a tubular housing connected to a handle, a catheter and a device for introducing sclerosant into a vein, which is a syringe with an elastic tube, while the ultrasound transducer is connected to the catheter using a thread , and in the tip of the catheter, which is in direct contact with the walls of the vein, there is a channel with an entrance through a conical nozzle, to which is attached an elastic tube connected to a sub-needle cone of the syringe, which is fixed to a bar connecting the handle to the body.