A thrombolytic catheter kit

Abstract

The utility model relates to medical instrument technical field provides a kind of thrombolytic catheter set, comprising: thrombolytic catheter, the thrombolytic catheter includes catheter main body, the distal end of the catheter main body is the curved section of pigtail type, the curved section is made of flexible hose, and a plurality of liquid outlet holes are arranged on the pipe wall of the curved section.The utility model provides a kind of thrombolytic catheter set, including thrombolytic catheter, thrombolytic catheter includes catheter main body, the distal end of the catheter main body is the curved section of pigtail type, the curved section is made of flexible hose, and a plurality of liquid outlet holes are arranged on the pipe wall of the curved section;Such setting can increase the accessible range of thrombolytic drug, so that thrombolytic drug acting area and intensity are enhanced, and the drug ejected has certain cutting effect on thrombus, further increases the drug acting area, is favorable to improve thrombolysis efficiency and effect.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a thrombolytic catheter kit. Background Technology

[0002] The incidence of vascular occlusive diseases, such as coronary heart disease, stroke, and peripheral artery disease, continues to rise, becoming one of the leading causes of death and disability worldwide. Currently, treatment methods include drug therapy, interventional procedures, and surgical procedures. Among these, the interventional thrombolytic catheter, which reaches the lesion site and releases thrombolytic drugs to dissolve the thrombus, is minimally invasive, precise, allows for rapid recovery, and has a wide range of applications, improving treatment efficiency and safety. Existing thrombolytic catheter kits include a thrombolytic catheter, an occlusion guidewire, and an injection gun. The occlusion guidewire works in conjunction with the thrombolytic catheter to seal its tip; the injection gun provides power and precise control for the injection of thrombolytic drugs, accurately delivering a specific dose to the thrombolytic catheter to ensure timely and quantitative delivery of the drug to the thrombus site. Existing thrombolytic catheters have a straight tip. In actual treatment, when encountering large thrombi, it is necessary to increase the thrombolytic drug's effective area to improve thrombolytic efficiency. However, this type of thrombolytic catheter has a limited thrombolytic area, making it difficult to achieve the desired effect and thus failing to achieve efficient and complete thrombus dissolution. Utility Model Content

[0003] Therefore, this invention aims to solve the problem that the thrombolytic catheter in the prior art has a limited thrombolytic area, making it difficult to achieve the expected results and dissolve thrombi efficiently and completely, and thus provides a thrombolytic catheter kit.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0005] This utility model provides a thrombolytic catheter kit, including: a thrombolytic catheter, the thrombolytic catheter including a catheter body, the distal end of the catheter body being a pigtail-shaped curved section, the curved section being made of a flexible tube, and the tube wall of the curved section being provided with several fluid outlet holes.

[0006] Furthermore, the thrombolytic catheter kit also includes an occlusion guidewire, which comprises a core wire body and an occlusion portion; the distal end of the core wire body has a straight section, the outer diameter of which is smaller than the outer diameter of the core wire body; the occlusion portion is disposed on the straight section along the outer circumferential direction of the straight section, and the outer diameter of the occlusion portion is adapted to the inner diameter of the curved section to occlude the distal end of the curved section.

[0007] Furthermore, the core wire body also has a tapered section, which is located between the core wire body and the straight section, and the outer diameter of the tapered section near the straight section is smaller than the outer diameter near the core wire body.

[0008] Furthermore, the sealing guide wire also includes a first spring; the first spring is sleeved on the straight section, the distal end of the first spring is connected to the sealing part, and the proximal end of the first spring is connected to the straight section.

[0009] Furthermore, the proximal end of the first spring is connected to the distal end of the tapered segment.

[0010] Furthermore, the sealing guide wire also includes a second spring; the second spring is sleeved on the straight section, the proximal end of the second spring is connected to the sealing part, and the distal end of the second spring is connected to the distal end of the straight section.

[0011] Furthermore, the outer diameter of the second spring is larger than that of the first spring, and the outer diameter of the second spring is adapted to the inner diameter of the distal end of the curved section.

[0012] Furthermore, the thrombolytic catheter kit also includes an injection gun, which comprises a push rod housing, a main housing, and a wrench; the push rod housing is slidably mounted on the main housing; the main housing has a drug extraction chamber inside; the push rod housing also contains a push rod, a rubber stopper, and a third spring; one end of the push rod is connected to the inner wall of the push rod housing, and the other end faces the drug extraction chamber; the rubber stopper is located at the end of the push rod near the drug extraction chamber; the third spring is sleeved on the push rod, with one end abutting against the push rod housing and the other end abutting against the main housing; The main shell is provided with an injection connector for connecting to the thrombolytic catheter. The interior of the main shell is provided with a drug delivery channel connecting the injection connector and the drug dispensing chamber. The wrench is provided with a first connecting part and a second connecting part. The wrench is hinged to the main shell through the first connecting part and to the push rod shell through the second connecting part. Pressing the wrench pushes the push rod shell to move in a direction close to the injection connector and drives the push rod into the drug dispensing chamber to push the drug out from the injection connector.

[0013] Furthermore, the main housing is provided with a U-shaped groove, the first connecting part is a first rotating shaft provided on the wrench, and the wrench is hinged in the U-shaped groove through the first rotating shaft; the push rod housing is provided with a second rotating shaft, the second connecting part is a rotating shaft mounting hole provided on the wrench, and the wrench is hinged on the second rotating shaft through the rotating shaft mounting hole.

[0014] Furthermore, the injection gun also includes a first limiting part and a second limiting part; the first limiting part is disposed on the side of the main shell away from the wrench; the second limiting part is disposed on the side of the wrench away from the main shell, and the first limiting part and the second limiting part are used to limit the hand in the gripping state.

[0015] The technical solution of this utility model has the following advantages:

[0016] The thrombolytic catheter kit provided by this utility model includes a thrombolytic catheter, which includes a catheter body. The distal end of the catheter body is a pigtail-shaped curved section made of flexible tubing. Several fluid outlet holes are provided on the wall of the curved section. This design can increase the reach of thrombolytic drugs, thereby enhancing the area and intensity of action of the thrombolytic drugs. Moreover, the sprayed drugs have a certain cutting effect on the thrombus, further increasing the area of ​​action of the drugs and improving the efficiency and effect of thrombolysis. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the thrombolytic catheter in the thrombolytic catheter kit according to an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the occlusion guidewire in the thrombolytic catheter kit according to an embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the injection gun in the initial state of the thrombolytic catheter kit in an embodiment of this utility model;

[0021] Figure 4 for Figure 3 A sectional view;

[0022] Figure 5 This is a schematic diagram of the injection gun in the thrombolytic catheter kit in the embodiment of this utility model.

[0023] Figure 6 for Figure 5 A sectional view;

[0024] Figure 7 This is a cross-sectional view of the main shell of the thrombolytic catheter kit in an embodiment of the present invention;

[0025] Figure 8This is a cross-sectional view of the pusher shell in the thrombolytic catheter kit according to an embodiment of the present invention;

[0026] Figure 9 This is a cross-sectional view of the wrench in the thrombolytic catheter kit of this utility model embodiment.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Thrombolytic catheter; 101. Catheter body; 102. Bend section; 103. Discharge port; 104. Catheter seat;

[0029] 2. Blocking guide wire; 201. Core wire; 202. Straight section; 203. Blocking part; 204. Tapered section; 205. First spring; 206. Second spring;

[0030] 3. Injection gun; 301. Push rod housing; 302. Main housing; 303. Push rod; 304. Third spring; 305. Wrench; 306. Injection connector; 307. First limiting part; 308. Second limiting part; 309. First connecting part; 310. Second connecting part; 311. U-shaped groove; 312. Second rotating shaft; 313. Knob; 314. Dispensing chamber; 315. Rubber stopper. Detailed Implementation

[0031] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0032] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0035] like Figure 1 As shown, this embodiment provides a thrombolytic catheter kit, including: a thrombolytic catheter 1, the thrombolytic catheter 1 including a catheter body 101, the distal end of the catheter body 101 being a pigtail-shaped curved section 102, the curved section 102 being made of a flexible tube, and the tube wall of the curved section 102 being provided with a plurality of fluid outlet holes 103.

[0036] The thrombolytic catheter kit provided in this embodiment includes a thrombolytic catheter 1, which includes a catheter body 101. The distal end of the catheter body 101 is a pigtail-shaped curved section 102, which is made of a flexible tube. Several fluid outlet holes 103 are provided on the wall of the curved section 102. This design can increase the reach of thrombolytic drugs, thereby enhancing the area and force of action of thrombolytic drugs. Moreover, the sprayed drugs have a certain cutting effect on thrombi, further increasing the area of ​​action of drugs and improving the efficiency and effect of thrombolysis.

[0037] like Figure 2As shown, the thrombolytic catheter kit also includes an occlusion guidewire 2, which comprises a core wire 201 body and an occlusion portion 203. The distal end of the core wire 201 body has a straight section 202, the outer diameter of which is smaller than the outer diameter of the core wire 201 body. The occlusion portion 203 is disposed on the straight section 202 along its outer periphery, and its outer diameter is adapted to the inner diameter of the curved section 102 to occlude the distal end of the curved section 102. For example, the occlusion portion 203 can occlude a bulb. The occlusion guidewire 2 is used in conjunction with the thrombolytic catheter 1, using the occlusion portion 203 to occlude the tip of the curved section 102, allowing the thrombolytic drug to be ejected from the outlet 103. Since conventional occlusion guidewires 2 are mainly used with thrombolysis catheters 1 that have straight tips, the tips of the occlusion guidewires 2 are relatively rigid, making it difficult to pass through thrombolysis catheters 1 with irregular tips, and easily damaging the original shape of the thrombolysis catheter 1. Therefore, the occlusion guidewire 2 in this application is provided with a straight section 202. Because the straight section is thinner, the distal end of the occlusion guidewire 2 can be more flexible, making it easier to pass through thrombolysis catheters 1 with irregular tips.

[0038] The core wire 201 body also has a tapered section 204, which is located between the core wire 201 body and the straight section 202. The outer diameter of the tapered section 204 near the straight section 202 is smaller than the outer diameter near the core wire 201 body. For example, the tapered section 204 can be frustum-shaped. This arrangement allows the tapered section 204 to achieve a gradual transition from thick to thin in the core wire 201 along the direction from the proximal to the distal end of the occlusion guidewire 2, which helps to enhance the guidewire's resistance to bending.

[0039] The sealing guide wire 2 further includes a first spring 205; the first spring 205 is sleeved on the straight section 202, with its distal end connected to the sealing portion 203 and its proximal end connected to the straight section 202. Preferably, the proximal end of the first spring 205 can be connected to the distal end of the tapered section 204. This arrangement provides a certain supporting force to the straight section 202, further enhancing the bending resistance of the core wire 201.

[0040] The sealing guide wire 2 further includes a second spring 206; the second spring 206 is sleeved on the straight section 202, with its proximal end connected to the sealing part 203 and its distal end connected to the distal end of the straight section 202. This arrangement provides a certain supporting force to the straight section 202, further enhancing the bending resistance of the core wire 201.

[0041] The outer diameter of the second spring 206 is larger than that of the first spring 205, and the outer diameter of the second spring 206 is matched with the inner diameter of the distal end of the bent section 102. This configuration, while enhancing the bending resistance of the core wire 201, also reduces the gap between the distal end of the bent section 102 and the core wire 201 by matching the outer diameter of the second spring 206 with the inner diameter of the distal end of the bent section 102, thus lowering the risk of thrombosis.

[0042] like Figure 3 , Figure 4 , Figure 5 as well as Figure 6 As shown, the thrombolytic catheter kit also includes an injection gun 3, which includes a push rod housing 301, a main housing 302, and a wrench 305. The push rod housing 301 is slidably mounted on the main housing 302. The main housing 302 has a drug extraction chamber 314 inside. The push rod housing 301 also contains a push rod 303, a rubber stopper 315, and a third spring 304. One end of the push rod 303 is connected to the inner wall of the push rod housing 301, and the other end faces the drug extraction chamber 314. The rubber stopper 315 is located at the end of the push rod 303 near the drug extraction chamber 314. The third spring 304 is sleeved on the push rod 303, with one end abutting against the push rod housing 301 and the other end abutting against the main housing 302. The main shell 302 is provided with an injection connector 306, which is used to connect to the thrombolytic catheter 1. The main shell 302 is provided with a drug delivery channel connecting the injection connector 306 and the drug dispensing chamber 314. The wrench 305 is provided with a first connecting part 309 and a second connecting part 310. The wrench 305 is hinged to the main shell 302 through the first connecting part 309 and hinged to the push rod shell 301 through the second connecting part 310. Pressing the wrench 305 pushes the push rod shell 301 to move in a direction close to the injection connector 306, and drives the push rod 303 into the drug dispensing chamber 314 to push the drug out from the injection connector 306.

[0043] The injection gun also includes a knob 313, which has threads on the outer wall of the drug dispensing chamber 314. The knob 313 matches the threads and is fitted onto the outer wall of the drug dispensing chamber 314. One end of the third spring 304 abuts against the push rod housing 301, and the other end abuts against the knob 313. By rotating the knob 313, the user can adjust the initial position of the push rod 303 relative to the drug dispensing chamber 314, thereby controlling the amount of drug pushed by the push rod 303 into the drug dispensing chamber 314 at one time.

[0044] Because conventional injection guns 3 exhibit a sticking sensation and produce abnormal noise when pressing the push rod housing 301, and require considerable force to press, medical personnel experience poor feel and difficulty in applying force when injecting medication. In emergency situations or when medical personnel need to perform multiple operations simultaneously, the need for single-handed operation of the injection gun 3 is common. However, the conventional injection gun 3's lack of force makes it difficult to use with one hand, limiting the operational flexibility of medical personnel and reducing work efficiency. In contrast, the injection gun 3 of this application improves the force application structure by adding a wrench 305, which is simultaneously hinged to both the push rod housing 301 and the main housing 302. This results in a better pressing feel during use. Moreover, as the pressing stroke of the wrench 305 increases, the speed of drug delivery gradually increases, providing a greater spray force that is beneficial for the initial cutting of thrombi and accelerating thrombus dissolution.

[0045] like Figure 7 , Figure 8 as well as Figure 9 As shown, for example, the main housing 302 may be provided with a U-shaped groove 311, the first connecting part 309 is a first rotating shaft provided on the wrench 305, and the wrench 305 is hinged in the U-shaped groove 311 through the first rotating shaft; the push rod housing 301 is provided with a second rotating shaft 312, the second connecting part 310 is a rotating shaft mounting hole provided on the wrench 305, and the wrench 305 is hinged in the second rotating shaft 312 through the rotating shaft mounting hole.

[0046] like Figure 3 As shown, the injection gun 3 further includes a first limiting part 307 and a second limiting part 308. The first limiting part 307 is disposed on the side of the main housing 302 away from the wrench 305; the second limiting part 308 is disposed on the side of the wrench 305 away from the main housing 302. The first limiting part 307 and the second limiting part 308 are used to limit the hand in the gripping state. For example, both the first limiting part 307 and the second limiting part 308 can be convex structures, and the contact points between the first limiting part 307 and the second limiting part 308 and the hand can be designed as curved surfaces. In use, the user's thumb abuts against the bottom curved surface of the first limiting part 307, and the index finger abuts against the bottom curved surface of the second limiting part 308, limiting the hand in the gripping state, preventing the injection gun 3 from slipping out of the hand during pressing, and making it easier for the user to apply force.

[0047] As for the thrombolytic catheter 1, it is the same as the conventional thrombolytic catheter 1, and its proximal end is also provided with a catheter seat 104. The catheter seat 104 is connected to the injection connector 306 of the injection gun 3 so that the drug is delivered into the thrombolytic catheter 1 through the injection connector 306.

[0048] As for the injection gun 3, it is the same as the conventional injection gun 3. A drug reservoir connector is provided in the main shell 302 for connecting to the drug reservoir syringe. The drug reservoir connector is connected to the drug dispensing chamber in the push rod shell 301 so that the drug in the drug reservoir syringe can be delivered to the drug dispensing chamber.

[0049] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A thrombolytic catheter kit, characterized in that, include: The thrombolytic catheter (1) includes a catheter body (101), the distal end of which is a pigtail-shaped curved section (102), the curved section (102) is made of a flexible tube, and the tube wall of the curved section (102) is provided with several outlet holes (103).

2. The thrombolytic catheter kit according to claim 1, characterized in that, It also includes a blocking guide wire (2), which includes a core wire (201) body and a blocking part (203); The distal end of the core wire (201) body has a straight section (202), the outer diameter of which is smaller than the outer diameter of the core wire (201) body; The sealing part (203) is disposed on the straight section (202) along the outer periphery of the straight section (202), and the outer diameter of the sealing part (203) is adapted to the inner diameter of the curved section (102) to seal the distal end of the curved section (102).

3. The thrombolytic catheter kit according to claim 2, characterized in that, The core wire (201) body also has a tapered section (204) located between the core wire (201) body and the straight section (202), and the outer diameter of the tapered section (204) near the straight section (202) is smaller than the outer diameter near the core wire (201) body.

4. The thrombolytic catheter kit according to claim 3, characterized in that, The sealing guide wire (2) also includes a first spring (205); The first spring (205) is sleeved on the straight section (202), the distal end of the first spring (205) is connected to the sealing part (203), and the proximal end of the first spring (205) is connected to the straight section (202).

5. The thrombolytic catheter kit according to claim 4, characterized in that, The proximal end of the first spring (205) is connected to the distal end of the tapered segment (204).

6. The thrombolytic catheter kit according to claim 4, characterized in that, The sealing guide wire (2) also includes a second spring (206); The second spring (206) is sleeved on the straight section (202), with the proximal end of the second spring (206) connected to the sealing part (203) and the distal end of the second spring (206) connected to the distal end of the straight section (202).

7. The thrombolytic catheter kit according to claim 6, characterized in that, The outer diameter of the second spring (206) is larger than the outer diameter of the first spring (205), and the outer diameter of the second spring (206) is adapted to the inner diameter of the distal end of the curved section (102).

8. The thrombolytic catheter kit according to claim 1, characterized in that, It also includes an injection gun (3), which includes a push rod housing (301), a main housing (302), and a wrench (305); The push rod housing (301) is slidably disposed on the main housing (302); The main shell (302) is provided with a medicine extraction cavity (314) inside; The push rod housing (301) is also provided with a push rod (303), a rubber stopper (315), and a third spring (304); one end of the push rod (303) is connected to the inner wall of the push rod housing (301), and the other end is directly opposite the medicine dispensing cavity (314); the rubber stopper (315) is disposed at the end of the push rod (303) near the medicine dispensing cavity (314); the third spring (304) is sleeved on the push rod (303), with one end abutting against the push rod housing (301) and the other end abutting against the main housing (302); The main shell (302) is provided with an injection connector (306), which is used to connect to the thrombolytic catheter (1). The main shell (302) is provided with a drug delivery channel that connects the injection connector (306) and the drug extraction chamber (314). The wrench (305) is provided with a first connecting part (309) and a second connecting part (310). The wrench (305) is hinged to the main shell (302) through the first connecting part (309), and the wrench (305) is hinged to the push rod shell (301) through the second connecting part (310). Pressing the wrench (305) pushes the push rod shell (301) to move in the direction close to the injection connector (306), and drives the push rod (303) into the drug dispensing chamber to push the drug out from the injection connector (306).

9. The thrombolytic catheter kit according to claim 8, characterized in that, The main housing (302) is provided with a U-shaped groove (311), and the first connecting part (309) is a first rotating shaft provided on the wrench (305). The wrench (305) is hinged in the U-shaped groove (311) through the first rotating shaft. The push rod housing (301) is provided with a second rotating shaft (312), and the second connecting part (310) is a rotating shaft mounting hole provided on the wrench (305). The wrench (305) is hinged to the second rotating shaft (312) through the rotating shaft mounting hole.

10. The thrombolytic catheter kit according to claim 8, characterized in that, The injection gun (3) also includes a first limiting part (307) and a second limiting part (308); The first limiting part (307) is disposed on the side of the main housing (302) away from the wrench (305); The second limiting part (308) is disposed on the side of the wrench (305) away from the main shell (302), and the first limiting part (307) and the second limiting part (308) are used to limit the hand in the gripping state.

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