CN114469257B

CN114469257B - Thrombus removing device

Info

Publication number: CN114469257B
Application number: CN202210340205.9A
Authority: CN
Inventors: 郑殿会; 常新洋; 朱权威; 尤子超; 李广师; 董永贺; 李飞; 杜庆庆; 刘颖
Original assignee: Beijing Huamai Taike Medical Instrument Co ltd
Current assignee: Beijing Huamai Taike Medical Instrument Co ltd
Priority date: 2022-04-02
Filing date: 2022-04-02
Publication date: 2022-07-01
Anticipated expiration: 2042-04-02
Also published as: CN114469257A

Abstract

The invention provides a thrombus removing device, relating to the technical field of medical equipment, and comprising: the injection device comprises a suction catheter, an injection section inner tube and an injection tube; the suction catheter is provided with a suction cavity and a plurality of suction holes arranged at intervals along the circumferential direction, and the plurality of suction holes are respectively communicated with the suction cavity; the injection section inner pipe is inserted into the suction duct, an annular cavity is formed between the suction duct and the injection section inner pipe, and the liquid injection pipe is in fluid communication with the annular cavity; a plurality of injection holes are arranged at intervals along the circumferential direction of the suction conduit and are respectively communicated with the annular cavity. According to the thrombus removing device provided by the invention, the liquid injection pipe can spray out liquid through the annular cavity and the plurality of injection holes, thrombus can be sucked into the suction cavity through the plurality of suction holes, the suction cavity and the annular cavity are mutually independent, so that the strength loss of suction and injection is avoided, and the thrombus suction force is maximally ensured.

Description

Thrombus removing device

Technical Field

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

Background

Mechanical thrombectomy can rapidly remove thrombus, improve clinical symptoms, reduce urokinase usage, and increase treatment safety. Usually, in the process of removing thrombus, the principle of fluid dynamics is adopted to break and suck the thrombus, thereby achieving the effects of rapidly removing the thrombus and relieving vein occlusion. However, during the thrombus aspiration process, the red blood cells are easily broken by the high-speed liquid, so that hemoglobinuria, renal function damage and even renal failure can occur. In addition, when the existing suction catheter device works, the liquid which is ejected from the liquid ejection hole and used for washing thrombus is the liquid refracted by the suction function, and the flow rate and the outflow volume of the liquid cause partial attenuation and loss in the refraction process, so that the flow rate and the outflow volume of the liquid are uncontrollable, and the aim of accurately and powerfully washing thrombus cannot be achieved.

Disclosure of Invention

The invention aims to provide a thrombus removal device to solve the technical problem that strength loss exists in suction and ejection of thrombus by a suction catheter in the prior art.

In a first aspect, the present invention provides a thrombus removal device comprising: the injection device comprises a suction catheter, an injection section inner tube and an injection tube;

the suction catheter is provided with a suction cavity and a plurality of suction holes arranged at intervals along the circumferential direction, and the plurality of suction holes are respectively communicated with the suction cavity;

the injection section inner tube is inserted into the suction duct, an annular cavity is formed between the suction duct and the injection section inner tube, and the liquid injection tube is communicated with the annular cavity by fluid;

and a plurality of injection holes are arranged at intervals along the circumferential direction of the suction conduit and are respectively communicated with the annular cavity.

With reference to the first aspect, the present invention provides a first possible implementation manner of the first aspect, wherein the injection section inner tube is provided with an annular groove, and the suction duct wraps around the annular groove to form the annular cavity.

With reference to the first possible implementation manner of the first aspect, the present invention provides a second possible implementation manner of the first aspect, wherein the injection segment inner tube comprises: a first tube part, a second tube part, and a narrow neck part connected between the first tube part and the second tube part;

the annular groove surrounds the thin neck part, and the first pipe part and the second pipe part are respectively attached to the inner side wall of the suction conduit so as to separate the suction cavity from the annular cavity.

With reference to the first possible implementation manner of the first aspect, the present disclosure provides a third possible implementation manner of the first aspect, wherein a first development marker band is disposed in the annular groove.

With reference to the first possible implementation manner of the first aspect, the present invention provides a fourth possible implementation manner of the first aspect, wherein the injection section inner tube is provided with a conduit groove, the conduit groove extends along an axial direction of the injection section inner tube, the conduit groove is communicated with the annular groove, and the injection tube is inserted into the conduit groove.

With reference to the fourth possible implementation manner of the first aspect, the present invention provides a fifth possible implementation manner of the first aspect, wherein the end portion of the liquid filling pipe is provided with a notch portion;

the conduit groove extends to the circumferential surface of the annular groove, and the notch portion is arranged opposite to the annular cavity.

With reference to the first aspect, the present disclosure provides a sixth possible implementation manner of the first aspect, wherein a second development marker band is disposed in the suction chamber.

In combination with the first aspect, the present invention provides a seventh possible embodiment of the first aspect, wherein the suction catheter comprises: a catheter body and a catheter tip mounted to an end of the catheter body.

With reference to the seventh possible implementation manner of the first aspect, the present invention provides an eighth possible implementation manner of the first aspect, wherein the catheter tip includes: the connector comprises a joint part, a conical part and a head part;

the joint part is connected with the catheter body, and the cone part is connected between the joint part and the end head part;

the outer diameter of the end head portion is smaller than the outer diameter of the joint portion;

the outer diameter of the conical portion decreases progressively from the end connected to the joint portion to the end connected to the end head portion.

With reference to the first aspect, the present invention provides a ninth possible implementation manner of the first aspect, wherein the thrombus removal device further comprises a guide wire, the guide wire passes through the suction catheter and the injection section inner tube, and the suction catheter, the injection section inner tube and the guide wire are coaxially arranged.

The embodiment of the invention has the following beneficial effects: adopt the suction catheter to be equipped with the suction chamber and along a plurality of suction holes that circumference interval set up, a plurality of suction holes communicate with the suction chamber respectively, it locates in the suction catheter to spout the section inner tube, form the ring chamber between suction catheter and the section inner tube of spouting, annotate liquid pipe and ring chamber fluid intercommunication, circumference interval along the suction catheter sets up a plurality of jet orifices, a plurality of jet orifices communicate with the ring chamber respectively, it can be with liquid through ring chamber and a plurality of jet orifices blowout to annotate the liquid pipe, and the thrombus can be sucked the suction intracavity through a plurality of suction holes, suction chamber and ring chamber mutual independence, and then avoid the dynamics loss of suction and injection, the maximize has guaranteed the thrombus suction force.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a cross-sectional view of a thrombus removal device provided in accordance with an embodiment of the present invention;

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

FIG. 3 is a schematic view of an inner tube of an injection section of a thrombectomy device provided in an embodiment of the present invention;

FIG. 4 is a front view of an inner tube of an injection section of a thrombectomy device according to an embodiment of the present invention;

FIG. 5 is a schematic view of an infusion tube of the thrombus removal device according to the embodiment of the present invention;

figure 6 is a schematic view of a catheter tip of a thrombectomy device provided in an embodiment of the present invention.

Icon: 100-a suction catheter; 101-a suction lumen; 102-a suction hole; 103-a ring cavity; 104-an injection hole; 110-a catheter body; 120-a catheter tip; 121-a joint part; 122-a cone portion; 123-end head; 200-an injection section inner tube; 201-annular groove; 202-a conduit groove; 210-a first tube portion; 220-a second tube portion; 230-thin neck; 300-liquid injection pipe; 301-a notch portion; 400-first development marker band; 500-second development label tape; 600-guide wire.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, 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., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "physical quantity" in the formula, unless otherwise noted, is understood to mean a basic quantity of a basic unit of international system of units, or a derived quantity derived from a basic quantity by a mathematical operation such as multiplication, division, differentiation, or integration.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 and 2, a thrombus removal device according to an embodiment of the present invention includes: a suction catheter 100, an injection section inner tube 200 and an injection tube 300; the suction catheter 100 is provided with a suction lumen 101 and a plurality of suction holes 102 arranged at intervals in the circumferential direction, the plurality of suction holes 102 communicating with the suction lumen 101, respectively; the injection section inner pipe 200 is inserted into the suction catheter 100, an annular cavity 103 is formed between the suction catheter 100 and the injection section inner pipe 200, and the liquid injection pipe 300 is communicated with the annular cavity 103 in a fluid mode; a plurality of injection holes 104 are provided at intervals along the circumferential direction of the suction duct 100, and the plurality of injection holes 104 communicate with the annular chamber 103, respectively.

In the process of removing thrombus, the liquid injection pipe 300 is communicated with the liquid pump, the liquid pump drives the physiological saline to flow into the annular cavity 103 through the liquid injection pipe 300, and the physiological saline entering the annular cavity 103 is uniformly sprayed and discharged along the circumferential direction of the suction catheter 100 through the plurality of injection holes 104; meanwhile, the suction power element employs a suction pump, the suction catheter 100 is used to communicate with the suction catheter 100, and thrombus is sucked into the suction lumen 101 through the plurality of suction holes 102. In the process, the suction cavity 101 and the annular cavity 103 are independent, so that the mutual interference between the liquid for washing the thrombus and the sucked thrombus is reduced, and the thrombus suction force is ensured to the maximum extent. In addition, the thrombolytic medicament can be firstly injected quantitatively and in a pulsating mode to soften or partially dissolve the thrombus, so that the thrombus can be sucked more conveniently.

In an embodiment of the invention, as shown in figures 1, 3 and 4, the injection segment inner tube 200 is provided with an annular groove 201, and the suction catheter 100 is wrapped around the annular groove 201 to form the annular cavity 103.

Specifically, the aspiration catheter 100 is sleeved on the injection section inner tube 200, so that the annular groove 201 is closed to form the annular cavity 103. The plurality of injection holes 104 are arranged at intervals in the circumferential direction of the annular chamber 103, thereby ensuring that the saline is uniformly injected through the plurality of injection holes 104.

In this embodiment, the injection section inner tube 200 comprises: a first tube part 210, a second tube part 220, and a narrow neck part 230 connected between the first tube part 210 and the second tube part 220; the annular recess 201 surrounds the narrow neck 230 and the first and

second tube portions

210 and 220 respectively engage the inner side walls of the suction duct 100 to separate the suction chamber 101 from the annular chamber 103.

The first development mark belt 400 is disposed in the annular groove 201, and the first development mark belt 400 may be coated on the circumferential surface of the thin neck portion 230 by a coating process.

As shown in fig. 1, 2, 3, 4 and 5, the injection section inner tube 200 is provided with a guide tube groove 202, the guide tube groove 202 extends in the axial direction of the injection section inner tube 200, the guide tube groove 202 communicates with the annular groove 201, and the injection tube 300 is inserted into the guide tube groove 202.

Specifically, the circumferential surfaces of the second tube part 220 and the narrow neck part 230 are recessed to form a guide tube groove 202, and the pouring tube 300 is inserted into the guide tube groove 202, thereby ensuring that the saline can be poured from the pouring tube 300 into the annular groove 201.

Further, the end of the liquid injection tube 300 is provided with a notch 301; the conduit groove 202 extends to the circumferential surface of the annular groove 201, and the notch portion 301 is disposed opposite to the annular cavity 103.

Specifically, the notch 301 has a semicircular cross section, and when the notch 301 is inserted into the guide pipe groove 202, the notch 301 faces the annular groove 201, the liquid pouring tube 300 is welded into the guide pipe groove 202, and the notch 301 is fitted into the guide pipe groove 202, so that the joint between the annular groove 201 and the notch 301 is smooth. The saline is injected from the pouring spout 300 into the annular groove 201 through the notch 301, and the saline can be dispersed in the annular groove 201 in the circumferential direction.

As shown in fig. 1, the suction chamber 101 is provided with a second development marker band 500 therein, and the suction hole 102 is located between the first development marker band 400 and the second development marker band 500.

As shown in fig. 1 and 6, the suction catheter 100 includes: a catheter body 110 and a catheter tip 120, the catheter tip 120 being mounted to an end of the catheter body 110. Wherein, the radial size of the end of the catheter tip 120 facing away from the catheter body 110 is reduced, thereby ensuring that the suction catheter 100 can smoothly enter the thrombus affected part.

Specifically, the catheter tip 120 includes: a joint part 121, a tapered part 122 and a tip part 123; the joint part 121 is connected with the catheter body 110, and the conical part 122 is connected between the joint part 121 and the tip part 123; the outer diameter of the end head 123 is smaller than the outer diameter of the joint part 121; the outer diameter of the tapered portion 122 decreases from the end of the connection joint portion 121 to the end of the connection end portion 123. In addition, the tip portion 123 is provided with a tip orifice through which the guide wire 600 can pass, thereby ensuring that the guide wire 600 is coaxial with the catheter tip 120.

Further, the thrombus clearing device also comprises a guide wire 600, wherein the guide wire 600 passes through the suction catheter 100 and the injection section inner tube 200, and the suction catheter 100, the injection section inner tube 200 and the guide wire 600 are coaxially arranged. The tip of the guide wire 600 is provided with a hemispherical end, so that the guide wire 600 can be smoothly moved and bent along the blood vessel, and the suction catheter 100 can be guided to the affected part of the thrombus by the guide wire 600.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A thrombus removal device, comprising: a suction catheter (100), an injection section inner tube (200) and a liquid injection tube (300);

the suction catheter (100) is provided with a suction cavity (101) and a plurality of suction holes (102) arranged at intervals along the circumferential direction, and the plurality of suction holes (102) are respectively communicated with the suction cavity (101);

the injection section inner pipe (200) is inserted into the suction catheter (100), an annular cavity (103) is formed between the suction catheter (100) and the injection section inner pipe (200), and the liquid injection pipe (300) is in fluid communication with the annular cavity (103);

a plurality of injection holes (104) are arranged at intervals along the circumferential direction of the suction duct (100), and the plurality of injection holes (104) are respectively communicated with the annular cavity (103);

the injection section inner tube (200) is provided with an annular groove (201), the annular groove (201) is wrapped by the suction catheter (100) to form the annular cavity (103), and the suction hole (102) is located between the injection section inner tube (200) and the head end of the suction catheter (100).

2. The thrombectomy device of claim 1, wherein said injection segment inner tube (200) comprises: a first tube part (210), a second tube part (220), and a thin neck part (230) connected between the first tube part (210) and the second tube part (220);

the annular groove (201) surrounds the thin neck part (230), and the first pipe part (210) and the second pipe part (220) are respectively attached to the inner side wall of the suction catheter (100) so as to separate the suction cavity (101) from the annular cavity (103).

3. The thrombectomy device according to claim 1, wherein said annular groove (201) is configured with a first visualization marker band (400).

4. The thrombus removal device according to claim 1, wherein the injection section inner tube (200) is provided with a catheter groove (202), the catheter groove (202) extends in an axial direction of the injection section inner tube (200), the catheter groove (202) communicates with the annular groove (201), and the injection tube (300) is inserted into the catheter groove (202).

5. The thrombus clearing device according to claim 4, wherein a notch portion (301) is provided at an end portion of the liquid injection tube (300);

the conduit groove (202) extends to the circumferential surface of the annular groove (201), and the notch portion (301) is disposed opposite to the annular cavity (103).

6. The thrombectomy device of claim 1, wherein a second visualization marker band (500) is disposed within said aspiration lumen (101).

7. The thrombectomy device of claim 1, wherein said aspiration catheter (100) comprises: a catheter body (110) and a catheter tip (120), the catheter tip (120) being mounted to an end of the catheter body (110).

8. The thrombectomy device of claim 7, wherein said catheter tip (120) comprises: a joint part (121), a taper part (122) and a head part (123);

the joint part (121) is connected with the catheter body (110), and the conical part (122) is connected between the joint part (121) and the end head part (123);

the outer diameter of the end head (123) is smaller than the outer diameter of the joint part (121);

the outer diameter of the tapered portion (122) decreases from the end connected to the joint portion (121) to the end connected to the end head portion (123).

9. The thrombectomy device according to claim 1, further comprising a guide wire (600), wherein said guide wire (600) passes through said aspiration catheter (100) and said injection section inner tube (200), and wherein said aspiration catheter (100), said injection section inner tube (200) and said guide wire (600) are coaxially disposed.