Anti-blocking vascular perfusion catheter

Abstract

The anti-blocking vascular perfusion catheter comprises an outer catheter body and an inner catheter body, the outer catheter body is provided with a plurality of circles of side hole units, each circle of side hole unit is provided with a plurality of side holes, and each side hole comprises a hole part and a groove part; a plurality of limiting units are arranged at the inner catheter, and each limiting unit comprises a first limiting ring and a second limiting ring; a reaming unit is further installed between the first limiting ring and the second limiting ring of each limiting unit, each reaming unit comprises an abutting circular ring located between the corresponding first limiting ring and the corresponding second limiting ring and a plurality of movable blocks, and one movable block is arranged in the groove part of each side hole; each movable block is connected with the corresponding abutting circular ring through an arc-shaped rod; the outer catheter is further connected with a limiting catheter located in the outer catheter, and the far end of the inner catheter is inserted into the limiting catheter. By means of the perfusion catheter, the problem that the side holes are blocked can be better solved, and better liquid medicine perfusion is achieved.

Description

Technical Field

[0001] The present application relates to the field of medical devices, and in particular to an anti-blockage vascular perfusion catheter. Background Art

[0002] Thrombi are small pieces of blood formed on the surface of the peeling or repaired part of the inner surface of the blood vessel. Thrombi are very harmful to human health. Among the treatment methods of thrombi, interventional therapy can effectively treat thrombi, and there are many different treatment methods for thrombi in interventional therapy. Among them, perfusing thrombi with liquid medicine to eliminate thrombi is an effective treatment method for thrombi. By pushing the vascular perfusion catheter to the designated location of the thrombus, effective thrombus elimination can be achieved by perfusing liquid medicine through the side holes on both sides of the perfusion catheter. However, due to the small side holes of the perfusion catheter, it is easy to get clogged during the perfusion process, thus affecting the perfusion effect. In addition, during the pushing process of the perfusion catheter, some blood vessels are difficult to push, and the perfusion catheter itself has insufficient pushing strength, resulting in poor pushing effect. Summary of the invention

[0003] Purpose of the invention: This application aims to overcome the defects of the prior art and provide an anti-blockage vascular perfusion catheter.

[0004] Technical solution: A vascular perfusion catheter comprises an outer catheter and an inner catheter, wherein the outer catheter is provided with a plurality of side hole units, each of which has a plurality of side holes, wherein the side holes comprise a hole portion and a groove portion connected to the hole portion and located on the inner side wall of the outer catheter, wherein the groove portion comprises a first groove with a rectangular cross section, a second groove with a trapezoidal cross section, and a third groove with a rectangular cross section, wherein the second groove connects the first groove and the third groove; wherein the inner catheter is provided with a plurality of limiting units, wherein the number of the limiting units is equal to the number of circles of the side hole units and the two correspond one to one, wherein the limiting units comprise a first limiting ring and a second limiting ring, wherein the first limiting ring and the second limiting ring The limiting rings are fixedly connected to the outer wall of the inner catheter; a hole expansion unit is also installed between the first limiting ring and the second limiting ring of each limiting unit, and the hole expansion unit includes a tightening ring located between the first limiting ring and the second limiting ring and a plurality of movable blocks, the number of the movable blocks is equal to the number of side holes in each circle of side hole units, and each side hole has a movable block in the groove portion, and each movable block and the abutting ring are connected by an arc rod; the outer catheter is also connected to a limiting catheter located in the outer catheter, and the distal end of the inner catheter is inserted into the limiting catheter; a circular ring connecting portion is connected between the distal end of the limiting catheter and the distal end of the outer catheter.

[0005] Furthermore, the outer side wall of the inner catheter is also fixedly connected to a first ring, the first ring is connected to a second ring through a plurality of connecting rods, the limiting catheter passes through the second ring, the proximal end of the limiting catheter is connected to an end ring, and the end ring is located between the first ring and the second ring.

[0006] Furthermore, the number of circles of the side hole units is 8-10, and they are evenly spaced along the length direction of the outer catheter.

[0007] Furthermore, the number of side holes in each circle of side hole units is 6-8.

[0008] Furthermore, the end of the movable block close to the third groove is in an arc shape.

[0009] Therefore, the end of the movable block can achieve better extrusion of the second groove, thereby achieving expansion of the hole portion.

[0010] Further, the sum of the lengths of the second groove and the third groove is equal to the length of the hole portion.

[0011] Furthermore, the width of the third groove is equal to the width of the hole portion; and the width of the first groove is greater than or equal to twice the width of the third groove.

[0012] Furthermore, the multiple side holes of each circle of side hole units are distributed in a circular shape with equal intervals.

[0013] Furthermore, the outer conduit is provided with two developing rings, and all the side holes are located between the two developing rings.

[0014] Furthermore, the distal end of the outer catheter has an arc-shaped chamfer.

[0015] Beneficial effect: When the perfusion catheter of the present application is perfusing a medicinal solution, if the side hole is blocked, the inner catheter can be used to expand the side hole to a certain extent, thereby achieving a better perfusion effect.

[0016] During the pushing process of the outer catheter of the perfusion catheter of the present application, the movable block abuts against the end of the first groove, so that the operator can apply a pushing force to the outer catheter and at the same time use the inner catheter to apply a pushing force, so that the perfusion catheter as a whole has better pushing characteristics.

[0017] The design of the outer catheter and the inner catheter of the present application makes it unnecessary to use an occlusion guide wire for the perfusion catheter, thereby making the perfusion and thrombus elimination operation simpler. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the perfusion catheter;

[0019] Figure 2 This is an enlarged view of area A;

[0020] Figure 3 is a schematic diagram of the cross section of the perfusion catheter;

[0021] Figure 4 This is an enlarged view of area B;

[0022] Figure 5 This is an enlarged view of area C. DETAILED DESCRIPTION

[0023] Reference numerals: 1 outer conduit; 1.1 hole portion; 1.2.1 first groove; 1.2.2 second groove; 1.2.3 third groove; 1.3 annular connecting portion;

[0024] 2.1 abutting ring; 2.2 arc rod; 2.3 movable block;

[0025] 3 inner conduit; 3.1 first limiting ring; 3.2 second limiting ring; 3.3 first circular ring; 3.4 connecting rod; 3.5 second circular ring;

[0026] 4. Limiting catheter; 4.1 End ring;

[0027] 5 Development ring.

[0028] As shown in the figure, an anti-blockage blood vessel perfusion catheter comprises an outer catheter 1 and an inner catheter 3, wherein the outer catheter 1 has a plurality of side hole units, each of which has a plurality of side holes, wherein the side holes comprise a hole portion 1.1 and a groove portion located on the inner side wall of the outer catheter 1 and connected to the hole portion 1.1, wherein the groove portion comprises a first groove 1.2.1 having a rectangular cross section, a second groove 1.2.2 having a trapezoidal cross section, and a third groove 1.2.3 having a rectangular cross section, wherein the second groove 1.2.2 connects the first groove 1.2.1 and the third groove 1.2.3; wherein the inner catheter 3 has a plurality of limiting units, wherein the number of the limiting units is equal to the number of circles of the side hole units and the two correspond one to one, wherein the limiting units comprise a first limiting ring 3.1 and a second limiting ring 3.2, wherein the first limiting ring 3. 1 and the second limiting ring 3.2 are fixedly connected to the outer wall of the inner catheter 3; a hole expansion unit is also installed between the first limiting ring 3.1 and the second limiting ring 3.2 of each limiting unit, and the hole expansion unit surrounds the tightening ring 2.1 and a plurality of movable blocks 2.3 located between the first limiting ring 3.1 and the second limiting ring 3.2. The number of the movable blocks 2.3 is equal to the number of side holes of each circle of side hole units, and each side hole has a movable block 2.3 in the groove portion, and each movable block 2.3 is connected to the abutting ring 2.1 through an arc rod 2.2; the outer catheter 1 is also connected to a limiting catheter 4 located in the outer catheter 1, and the distal end of the inner catheter 3 is inserted into the limiting catheter 4; a circular ring connecting portion 1.3 is connected between the distal end of the limiting catheter and the distal end of the outer catheter.

[0029] The outer side wall of the inner catheter 3 is also fixedly connected with a first circular ring 3.3, and the first circular ring 3.3 is connected with a second circular ring 3.5 through a plurality of connecting rods 3.4. The limiting catheter 4 passes through the second circular ring 3.5, and the proximal end of the limiting catheter 4 is connected with an end circular ring 4.1, and the end circular ring 4.1 is located between the first circular ring 3.3 and the second circular ring 3.5. The number of circles of the side hole unit is 8-10 circles, and they are evenly spaced along the length direction of the outer catheter 1; the number of side holes of each circle of the side hole unit is 6-8. The end of the movable block 2.3 close to the third groove 1.2.3 is in an arc shape. The sum of the lengths of the second groove 1.2.2 and the third groove 1.2.3 is equal to the length of the hole portion 1.1; the width of the third groove 1.2.3 is equal to the width of the hole portion 1.1; the width of the first groove 1.2.1 is greater than or equal to twice the width of the third groove 1.2.3. The multiple side holes of each circle of the side hole unit are evenly spaced and distributed in a circular shape. The outer conduit 1 is provided with two developing rings 5, and all the side holes are located between the two developing rings 5. The distal end of the outer conduit is provided with an arc chamfer.

[0030] In the perfusion catheter of the present application, the guide wire can be inserted through the inner catheter, and the front end of the inner catheter cooperates with the limiting catheter, so as to facilitate the guide wire to pass through the distal end of the outer catheter. In addition, the end ring at the limiting catheter and the first and second rings of the inner catheter can cooperate, so that the movement range of the inner catheter relative to the outer catheter is limited, thereby preventing the movable block from being moved too much. In addition, the design of the arc rod at the expansion unit increases the flexibility of the inner catheter and the outer catheter as a whole because the arc rod can be bent to a certain extent.

[0031] Furthermore, by perfusing the space between the outer catheter and the inner catheter with liquid medicine, the present application does not require the use of an occlusion guide wire, and the operation is simpler.

[0032] When the perfusion catheter is pushed, the movable block abuts against the first groove, so that a pushing force can be applied to the outer catheter during pushing, and at the same time, a pushing force can be applied by the inner catheter, so that the perfusion catheter as a whole has better pushing characteristics.

[0033] During the perfusion process, when the side hole of the perfusion catheter is blocked, the inner catheter can be pulled backward relative to the outer catheter to cause the movable block to squeeze the second groove, thereby causing the side hole to expand slightly, which can make the perfusion of the drug solution more convenient and reduce the impact of the side hole blockage.

[0034] Although the present invention has been illustrated and described with respect to the preferred embodiments, it will be appreciated by those skilled in the art that various changes and modifications may be made to the present invention without departing from the scope of the present invention as defined by the claims.

Claims

1. An anti-blockage vascular perfusion catheter, characterized in that: The invention comprises an outer conduit and an inner conduit, wherein the outer conduit is provided with a plurality of side hole units, each side hole unit having a plurality of side holes, the side hole comprising a hole portion and a groove portion located on the inner side wall of the outer conduit and connected with the hole portion, the groove portion comprising a first groove with a rectangular cross section, a second groove with a trapezoidal cross section and a third groove with a rectangular cross section, the second groove connecting the first groove and the third groove; the inner conduit is provided with a plurality of limiting units, the number of the limiting units is equal to the number of circles of the side hole units and the two correspond one to one, the limiting units comprising a first limiting ring and a second limiting ring, the first limiting ring and the second limiting ring are both connected to the inner conduit The outer wall of the tube is fixedly connected; a hole expanding unit is also installed between the first limiting ring and the second limiting ring of each limiting unit, and the hole expanding unit includes a tightening ring located between the first limiting ring and the second limiting ring and a plurality of movable blocks, the number of the movable blocks is equal to the number of side holes in each circle of side hole units, and each side hole has a movable block in the groove portion, and each movable block and the abutting ring are connected by an arc rod; the outer catheter is also connected to a limiting catheter located in the outer catheter, and the distal end of the inner catheter is inserted into the limiting catheter; a circular ring connecting portion is connected between the distal end of the limiting catheter and the distal end of the outer catheter.

2. The anti-blockage vascular perfusion catheter according to claim 1, characterized in that: The outer side wall of the inner catheter is also fixedly connected with a first ring, the first ring is connected with a second ring through a plurality of connecting rods, the limiting catheter passes through the second ring, the proximal end of the limiting catheter is connected with an end ring, and the end ring is located between the first ring and the second ring.

3. The anti-clogging vascular perfusion catheter according to claim 1, characterized in that: The number of circles of the side hole units is 8-10, and they are evenly spaced along the length direction of the outer catheter; the number of side holes in each circle of the side hole units is 6-8.

4. The anti-blockage vascular perfusion catheter according to claim 1, characterized in that: The end of the movable block close to the third groove is in an arc shape.

5. The anti-clogging vascular perfusion catheter according to claim 1, characterized in that: The sum of the lengths of the second groove and the third groove is equal to the length of the hole portion; the width of the third groove is equal to the width of the hole portion; and the width of the first groove is greater than or equal to twice the width of the third groove.

6. The anti-clogging vascular perfusion catheter according to claim 1, characterized in that: The multiple side holes of each circle of side hole units are distributed in a circular shape with equal intervals.

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