CN110652339B - Thrombus removing device - Google Patents

Abstract

The invention provides a thrombus clearing device, which belongs to the technical field of medical instruments and comprises: the recovery tube is provided with at least two thrombus recovery ports along the front-back direction on the side wall, at least one double-circulation forming hole is formed in the middle of each thrombus recovery port, each double-circulation forming hole is provided with a first outlet facing the inner wall direction of the blood vessel and deviating to the front direction, and each double-circulation forming hole is also provided with a second outlet facing the inner wall direction of the blood vessel and deviating to the back direction; the medicine feeding pipe is arranged in the recovery pipe and is provided with at least one jet hole, and the jet hole faces to an inlet of the double-circulation forming hole. According to the thrombus removing device provided by the invention, the liquid medicine is ejected from the jet hole and injected into the double-circulation forming hole and then is divided into two liquid medicine flows with different directions, the two liquid medicine flows can simultaneously remove thrombus on the vascular wall in the front and back directions, the impact area of the liquid medicine is increased, the advancing and retreating amplitude of the recovery tube in the blood vessel is reduced, and the thrombus removing efficiency is greatly accelerated.

Description

thrombectomy device

technical field

The invention relates to the technical field of medical devices, in particular to a thrombus removal device.

Background technique

Mechanical thrombectomy is a means of treating blood clots by delivering a thrombectomy device to the site of deep vein thrombosis and mechanically removing the blood clot. It has short curative effect and excellent therapeutic effect, and is currently the most advanced and effective peripheral arteriovenous thrombosis volume reduction technology.

Chinese patent document CN110049735A discloses a thrombus removal catheter, which includes a fluid pulse generator, an outflow hole, an inflow hole and a high-pressure pipe. The high-pressure pipe is provided with a jet hole. After the ejection hole is ejected, the thrombus removal catheter is ejected from the outflow hole, and after the thrombus is removed, it returns to the thrombus removal catheter from the inflow hole, and is discharged from the body.

However, the thrombus removal device in the above scheme uses a single circulation flow to clear the thrombus on the blood vessel wall. The single circulation flow removes the thrombus on the blood vessel wall with a small area and low cleaning efficiency, resulting in a long operation time, high operation risk and high risk. Surgery costs are high.

SUMMARY OF THE INVENTION

Therefore, the technical problem to be solved by the present invention is to overcome the defect of low thrombus removal efficiency of the prior art thrombus removal device, thereby providing a thrombus removal device.

In order to solve the above technical problems, the present invention provides a thrombus removal device, comprising:

The recovery tube has at least two thrombus recovery ports on the side wall along the front and rear directions, and at least one double-circulation formation hole is opened in the middle of the thrombus recovery port. the outlet, the double-circulation-forming hole also has a second outlet that faces the inner wall of the blood vessel and is biased to the rear;

The medicine delivery pipe is arranged inside the recovery pipe and has at least one jet hole, and the jet hole faces the inlet of the double-circle flow forming hole.

Preferably, a plurality of double-circle flow forming holes are provided along the circumferential direction of the pipe wall of the recovery pipe.

Preferably, a Y-shaped channel is provided in the double circulation forming hole.

Preferably, the jet holes are oriented towards the inlet sidewall of the Y-shaped channel of the double-circle flow forming hole.

Preferably, the jet hole is arranged on the jet tube, and the jet tube communicates with the drug delivery tube.

Preferably, the jet tube is an annular tube.

Preferably, the jet tube is perpendicular to the drug delivery tube.

Preferably, there are a plurality of jet holes, which correspond one-to-one with the double-circulation-forming holes.

Preferably, the head of the recovery pipe is tapered.

Preferably, the tail of the recovery pipe is adapted to be connected to a recovery device. The technical scheme of the present invention has the following advantages:

1. In the thrombus removal device provided by the present invention, the recovery tube is provided with a double-circle flow forming hole, and the thrombus recovery port is provided with an inlet and two outlets facing different directions, and the medicinal liquid is ejected from the jet hole and injected into the double-circle flow forming hole. It is divided into two streams of liquid medicine facing different directions. The two streams of liquid medicine can simultaneously remove the thrombus on the blood vessel wall in the front and rear directions, which increases the impact area of the liquid medicine and greatly speeds up the efficiency of thrombus removal. At the same time, the range of advancing and retreating of the recovery tube in the blood vessel is reduced, the operation time can be reduced, and the operation risk is greatly reduced.

2. In the thrombus removal device provided by the present invention, a plurality of double-circle formation holes are arranged in the circumferential direction of the tube wall of the recovery tube, which can simultaneously remove the thrombus in the circumferential direction on the blood vessel wall and reduce the rotation of the recovery tube in the blood vessel. It can further accelerate the removal efficiency of the thrombus removal device, and at the same time reduce the movement range of the recovery tube, which can reduce the possibility of the thrombus removal device falling off from the blood vessel and reduce the risk of surgery.

3. In the thrombus removal device provided by the present invention, a Y-shaped channel is arranged in the double-circle formation hole, which simplifies the structure of the double-circle flow forming hole and facilitates the fabrication of the recovery tube.

4. In the thrombus removal device provided by the present invention, the jet hole is directed to the inlet side wall of the Y-shaped channel of the double-circle flow forming hole, so that the medicinal liquid ejected from the jet hole is first sprayed to the side wall of the entrance of the double-circle flow forming hole, so that the After the liquid collides with the side wall, its kinetic energy is reduced, and then it is ejected from the double-circulation forming hole, which reduces the impact force of the liquid on the blood vessel wall and avoids the liquid breaking through the blood vessel wall and causing medical accidents.

5. In the thrombus removal device provided by the present invention, the jet tube is an annular tube, so that the position of the jet hole can be arbitrarily selected so as to be suitable for forming a hole with the double loop.

6. In the thrombus removal device provided by the present invention, the jet tube is perpendicular to the drug delivery tube, which is convenient to control the drug liquid ejected from the jet hole to be injected into the double-circle flow forming hole.

7. In the thrombus removal device provided by the present invention, there are a plurality of jet holes, which are in one-to-one correspondence with the double-circle flow forming holes, so that one jet hole is matched with one double-circle flow forming hole to further accelerate the thrombus clearing efficiency.

8. In the thrombus removal device provided by the present invention, the head of the recovery tube is tapered, and the forward end of the recovery tube is thinner, which facilitates the advancement of the recovery tube in the blood vessel.

9. In the thrombus removal device provided by the present invention, the tail of the recovery tube is suitable for connecting with the recovery device, and is used to extract the medicinal liquid with the thrombus residue after the thrombus has been removed from the blood vessel, so as to prevent the medicinal liquid from flowing with the blood and make the medicinal liquid flow. Dangerous accumulation of thrombus debris in the fluid elsewhere in the body.

Description of drawings

In order to illustrate the specific embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the specific embodiments or the prior art. Obviously, the accompanying drawings in the following description The drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

FIG. 1 is a schematic working diagram of the thrombus removal device provided in the embodiment of the present invention.

FIG. 2 is a schematic structural diagram of a thrombus removal device provided in an embodiment of the present invention.

FIG. 3 is a schematic structural diagram of a double-loop formation hole provided in an embodiment of the present invention.

Description of reference numerals: 1. Recovery tube; 2. Drug delivery tube; 3. Double-circulation forming hole; 4. Thrombus recovery port; 5. Jet tube; 6. Jet hole; 7, thrombus;

Detailed ways

The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation or a specific orientation. construction and operation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first", "second", and "third" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

As shown in FIGS. 1-3 , a specific implementation manner of the thrombus removal device provided in this embodiment includes: a recovery tube 1 and a drug delivery tube 2 .

The side wall of the recovery tube 1 is provided with a pair of thrombus recovery ports 4 along the front-rear direction, and the front-back direction is the direction in which the recovery tube 1 advances and retreats in the blood vessel. There is a double circulation forming hole 3, the double circulation forming hole 3 is provided with a Y-shaped channel, the first outlet of the Y-shaped channel faces the inner wall of the blood vessel and is biased forward, and the second outlet of the Y-shaped channel is directed towards the inner wall of the blood vessel and is biased. Second exit at the rear. Three double-circulation forming holes 3 are provided along the circumferential direction of the tube wall of the recovery tube 1, and three pairs of thrombus recovery ports 4 are provided along the circumferential direction of the tube wall of the recovery tube 1, which can reduce the rotation range of the recovery tube 1 in the blood vessel. The thrombus 7 on the entire blood vessel wall 8 is completely removed, which reduces the probability of the thrombus 7 removing device falling off from the blood vessel and reduces the risk of surgery. The thrombus recovery port 4 corresponds to the double circulation forming hole 3 in the front-rear direction.

The recovery pipe 1 is provided with a drug delivery pipe 2, and the drug delivery pipe 2 is connected with a jet pipe 5. The jet pipe 5 communicates with the drug delivery pipe 2 and is provided with three jet holes 6. The jet holes 6 and the double circulation forming holes 3 are one by one. Correspondingly, the jet hole 6 is used to spray the liquid medicine into the corresponding double-circle flow forming hole 3, the jet hole 6 is arranged on the jet tube 5, the jet tube 5 is an annular tube and the jet tube 5 is perpendicular to the drug delivery tube 2, and the jet flow The hole 6 faces the inlet side wall of the Y-shaped channel of the double circulation forming hole 3 . The head of the recovery tube 1 is tapered, which is convenient for the advancement of the recovery tube 1 in the blood vessel. The balance causes the medicinal liquid to be ejected from the jet hole 6 and cannot accurately reach the inlet of the double-circulation formation hole 3. The tail of the recovery pipe 1 is suitable for connecting with the recovery equipment, so that the medicinal liquid after the thrombus removal is completed is drawn out from the recovery pipe 1. in vitro.

During the thrombus removal operation, after the recovery tube 1 moves to the position where the thrombus is to be removed in the blood vessel, the medicinal liquid flows from the medicine delivery tube 2 to the jet tube 5 by using an external high-pressure medicinal liquid delivery device. The three jet holes 6 are ejected. The medicinal liquid is sprayed onto the side wall at the entrance of the double-circle flow forming hole 3, and randomly collides with the side wall of the double-circle flow forming hole 3 at the entrance, which reduces the kinetic energy of the medicinal liquid and prevents the medicinal liquid from breaking through the blood vessel wall due to excessive impact force 8 cause medical malpractice. As shown in Fig. 1, the arrow direction in the figure is the flow path after the liquid medicine is ejected from the jet hole 6, and the liquid medicine is ejected from the two outlets of the Y-shaped channel of the double-circle flow forming hole 3, forming two circular flows, impacting and accumulating The thrombus 7 on the vessel wall 8 is removed. After the medicinal solution removes the thrombus 7, it carries the thrombus residue into the thrombus recovery port 4, and is withdrawn from the recovery tube 1 to prevent the thrombus residue from flowing with the blood to form new thrombus 7 in other parts of the body. Since the recovery tube 1 is provided with a plurality of double-circle-flow forming holes 3 and the liquid medicine can form a circulating flow in the front and rear directions after being ejected from the double-circle-flow forming holes 3, the thrombus 7 on the blood vessel wall 8 can be removed at the same time. The removal area of the medicinal solution is reduced, and the movement range of the recovery tube 1 moving forward and backward in the blood vessel is reduced, which can greatly improve the thrombus removal efficiency, reduce the operation time and reduce the operation risk.

Obviously, the above-mentioned embodiments are only examples for clear description, and are not intended to limit the implementation manner. For those of ordinary skill in the art, changes or modifications in other different forms can also be made on the basis of the above description. There is no need and cannot be exhaustive of all implementations here. And the obvious changes or changes derived from this are still within the protection scope of the present invention.

Claims (10)

1. thrombectomy device, characterized in that, comprising: The recovery tube (1) is provided with at least two thrombus recovery ports (4) on the side wall along the front-rear direction, and at least one double-circulation formation hole (3) is provided in the middle of the thrombus recovery port (4). The double circulation forming hole (3) has a first outlet that faces the inner wall direction of the blood vessel wall (8) and is biased forward, and the double circulation forming hole (3) also has a second outlet that faces the inner wall direction of the blood vessel wall (8) and is biased backward. 2. Export; The medicine delivery pipe (2) is arranged inside the recovery pipe (1), and has at least one jet hole (6), and the jet hole (6) faces the inlet of the double circulation forming hole (3). 2 . The thrombus removal device according to claim 1 , characterized in that, there are a plurality of the double-circulation forming holes ( 3 ) along the circumferential direction of the tube wall of the recovery tube ( 1 ). 3 . 3. The thrombus removal device according to claim 1, characterized in that, a Y-shaped channel is provided in the double-circulation forming hole (3). 4. The thrombectomy device according to claim 3, characterized in that the jet hole (6) faces the inlet side wall of the Y-shaped channel of the double-circulation forming hole (3). 5. The thrombus removal device according to claim 1, wherein the jet hole (6) is arranged on a jet tube (5), and the jet tube (5) communicates with the drug delivery tube (2) . 6. The thrombus removal device according to claim 5, wherein the jet tube (5) is an annular tube. 7. The thrombus removal device according to claim 6, characterized in that, the jet tube (5) is perpendicular to the drug delivery tube (2). 8 . The thrombus removal device according to claim 6 , wherein the jet holes ( 6 ) have a plurality of them and are in one-to-one correspondence with the double-circulation-forming holes ( 3 ). 9 . 9. The thrombectomy device according to claim 1, wherein the head of the recovery tube (1) is tapered. 10. The thrombectomy device according to claim 9, characterized in that the tail of the recovery tube (1) is adapted to be connected with a recovery device.

Images