Main and auxiliary catheter type contact thrombolysis catheter

Abstract

A contact thrombolysis catheter with a main catheter and an auxiliary catheter comprises a main catheter, the main catheter is provided with a spiral auxiliary catheter groove used for winding the auxiliary catheter, the main catheter and the auxiliary catheter are each provided with a plurality of medicine spraying holes, and the auxiliary catheter is made of water swelling rubber materials. And a medicine spraying hole is also formed in the groove of the auxiliary catheter. And a main catheter guide wire is arranged in the main catheter. And an auxiliary catheter guide wire is arranged in the auxiliary catheter. The thrombus aspirator has the following advantages that the structural design is reasonable, and compared with high trauma and multiple complications caused by direct incision thrombus extraction and limited aspiration capacity of thrombus aspiration in an interventional mode, the thrombus is prone to falling off, the inner wall of a lumen is damaged and the like, the thrombus aspiration efficiency is improved, and the thrombus aspiration efficiency is improved. The contact thrombolysis catheter provided by the invention has the advantages of small trauma, good thrombolysis effect, small dosage, small damage to other parts and the like, provides a safer and more efficient choice for treating acute thrombus, and has important clinical application value and wide application prospect.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a main-and-auxiliary catheter type contact thrombolysis catheter. Background Art

[0002] Thrombosis refers to a type of disease in which abnormal blood coagulation in blood vessels leads to arterial ischemia or venous reflux obstruction. The purpose of clinical treatment is to clear the blood vessel lumen as much as possible. At present, the commonly used methods for opening the lumen of acute thrombosis in clinical practice are: 1. Direct incision and thrombectomy: large trauma and many complications; 2. Interventional aspiration of thrombus: the ability and degree of aspiration are limited, and the process can easily cause thrombus tissue to fall off, migrate, and even damage the inner wall of the lumen; 3. Contact catheter thrombolysis: less trauma; contact catheter thrombolysis delivers the drug directly to the thrombus site, directly contacts the thrombus to take effect, the overall dosage is less, and the damage to other parts is relatively small; the ablation process of thrombus is gentler rather than more violent.

[0003] When performing contact catheter thrombolysis, the most commonly used instrument is the contact thrombolytic catheter, which is usually composed of an infusion catheter, a connector, a two-way anti-reflux valve, an occlusion guidewire (or occlusion ball guidewire), a syringe, etc. It can be delivered to the site of thrombus, continuously pump thrombolytic drugs into the thrombus tissue for a period of time, and then be removed in real time according to the thrombolytic effect and other conditions.

[0004] At present, the working principles of contact thrombolytic catheters in clinical practice are basically similar, but in actual operation, they have common shortcomings. Common shortcomings are:

[0005] As the name suggests, the effect of contact thrombolytic catheter is positively correlated with the contact, and currently the main type of thrombolytic catheter on the market is a tubular one, which has a relatively small contact area. Summary of the invention

[0006] The purpose of the present invention is to solve the problems existing in the background technology and provide a primary-secondary catheter type contact thrombolytic catheter.

[0007] In order to solve the above technical problems, the technical solution provided by the present invention is: a main-sub-catheter type contact thrombolytic catheter, comprising a main catheter, on which a spiral-shaped sub-catheter groove for winding the sub-catheter is provided, and a plurality of spray holes are provided on the main catheter and the sub-catheter, and the sub-catheter is made of water-swellable rubber material.

[0008] Preferably, a spraying hole is also provided in the groove of the secondary conduit.

[0009] Preferably, a main catheter guide wire is arranged in the main catheter.

[0010] Preferably, a secondary catheter guide wire is arranged in the secondary catheter.

[0011] Preferably, the main conduit is made of medical silicone.

[0012] The present invention has the following advantages: reasonable structural design. Compared with the high trauma and multiple complications of direct incision and thrombectomy, and the limited suction capacity of interventional thrombus aspiration and the easy thrombus detachment and damage to the inner wall of the lumen, the contact thrombolytic catheter of the present invention has the advantages of less trauma, good thrombolytic effect, less medication, and less damage to other parts. It provides a safer and more efficient option for the treatment of acute thrombosis, and has important clinical application value and broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of a main-auxiliary catheter type contact thrombolytic catheter of the present invention in a state where the auxiliary catheter is wound around.

[0014] Figure 2 It is a structural schematic diagram of a main-auxiliary catheter type contact thrombolytic catheter of the present invention when the auxiliary catheter is not entangled. DETAILED DESCRIPTION

[0015] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0016] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0017] In the description of the embodiments of the present invention, if a feature is referred to as being "set", "fixed", "connected", or "installed" on another feature, it may be directly set, fixed, or connected to the other feature, or it may be indirectly set, fixed, connected, or installed on the other feature. In the description of the embodiments of the present invention, if "several" is involved, it means more than one, if "multiple" is involved, it means more than two, if "greater than", "less than", or "exceeds" is involved, it should be understood as not including the number itself, and if "above", "below", or "within" is involved, it should be understood as including the number itself. If "first" or "second" is involved, it should be understood as being used to distinguish technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0018] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings.

[0019] The preferred embodiments of the present invention are shown in the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0020] Example

[0021] Combined with Figure 1-2 A main-sub-catheter type contact thrombolytic catheter includes a main catheter 100, on which a spiral-shaped sub-catheter groove 200 for winding the sub-catheter is provided, and a plurality of spray holes 300 are provided on the main catheter and the sub-catheter, and the sub-catheter is made of water-swellable rubber material.

[0022] As a preferred implementation scheme of this embodiment, a spraying hole is also provided in the groove of the secondary conduit.

[0023] As a preferred implementation scheme of this embodiment, a main catheter guide wire 101 is arranged in the main catheter.

[0024] As a preferred implementation scheme of this embodiment, a secondary catheter guide wire 201 is provided in the secondary catheter.

[0025] As a preferred implementation scheme of this embodiment, the main catheter is made of medical silicone.

[0026] The working principle of the present invention is: the main catheter has a spiral-shaped secondary catheter groove reserved on the outside for winding the secondary catheter, and a spraying hole is reserved in the secondary catheter groove for subsequent needs. A thin secondary catheter is placed in the secondary catheter groove; after reaching the thrombus site, the medicine is pumped from the two tubes. The key point is: the secondary catheter made of water-swelling rubber material will slowly expand and thicken from the center of the blood vessel to the periphery when it encounters blood or liquid. After the treatment course is over, in order to prevent the main and secondary catheters from being entangled, the secondary catheter guide wire is placed in the secondary catheter, first withdrawn from the body, and then the main catheter is withdrawn with the main catheter guide wire.

[0027] The advantages of the present invention are described in detail as follows: Multi-site contact thrombolysis advantage, increased contact area.

[0028] Traditional contact thrombolytic catheters are mostly single-tube structures with limited contact areas. The main-sub-catheter contact thrombolytic catheter of the present invention greatly increases the contact area with the thrombus by providing a spiral-shaped sub-catheter groove on the main catheter and winding the sub-catheter. The sub-catheter can be placed at the thrombus site together with the main catheter, so that the thrombolytic drug can be sprayed simultaneously from multiple spray holes on the main catheter and the sub-catheter, achieving multi-directional and large-area contact with the thrombus, significantly improving the thrombolytic efficiency.

[0029] For example, in the case of a long segment of thrombus, a traditional catheter may only be able to perform thrombolysis locally, while the catheter of the present invention can release drugs more comprehensively along the length of the thrombus and the surrounding area, thereby accelerating the thrombolysis process.

[0030] Deep thrombolytic effect. Since the secondary catheter is made of water-swelling rubber, it will expand when it comes into contact with water in blood or thrombolytic drugs. This expansion characteristic can not only further increase the contact area with the thrombus, but also squeeze the loose thrombus, allowing the thrombolytic drugs to better contact the inside of the thrombus, which is conducive to the deep action of the drugs, thereby improving the ablation effect of the thrombus and reducing the thrombolysis time. At the same time, this slow and mild expansion can play the role of slow balloon expansion, expand the inner diameter of the lumen, and improve the patency of the lumen.

[0031] The setting of the auxiliary catheter groove is also a unique design of the present invention: the auxiliary catheter is located in the auxiliary catheter groove, and the groove is "track-type" to prevent the auxiliary catheter from derailing and scattering on the main catheter; the top end of the auxiliary catheter is fixed on the main catheter, which is convenient for delivery into the body; after the thrombolytic therapy course is over, the auxiliary catheter guide wire is sent into the auxiliary catheter to trigger the fixed point, so that the auxiliary catheter can be unloaded from the main catheter, which is convenient for separate early removal: (the diameter of the auxiliary catheter after expansion does not exceed the diameter of the main catheter; the auxiliary catheter is pulled out through the intersection of the main and auxiliary catheters).

[0032] Material advantages, safety of medical silicone material for main catheters The main catheter is made of medical silicone material, which has good biocompatibility and little irritation to the blood vessel wall, reducing the risk of complications such as vascular endothelial damage and inflammatory response. During long-term contact with the blood vessel wall, the medical silicone material can maintain stable performance and will not release harmful substances, ensuring the safety of patients.

[0033] The functionality of the water-swelling rubber material of the auxiliary catheter not only increases the contact area and promotes drug penetration during the thrombolysis process, but also its softness and elasticity can adapt to the dynamic environment in the blood vessel. Under conditions such as vascular pulsation and blood flow, the auxiliary catheter can deform appropriately with the deformation of the blood vessel, without causing excessive pressure or damage to the blood vessel wall, while maintaining close contact with the thrombus to ensure the continuity of the thrombolytic effect. The overall advantage improves the effect of thrombolytic treatment, and the comprehensive advantage accelerates the thrombolytic process.

[0034] In summary, the primary and secondary catheter type contact thrombolytic catheter of the present invention can dissolve blood clots more effectively through multiple advantages such as multi-site contact thrombolysis, precise drug release, and high-quality materials. In clinical applications, it can restore the patency of the blood vessel lumen more quickly, improve symptoms such as arterial ischemia or venous reflux obstruction, and reduce tissue and organ damage caused by blood clots.

[0035] The contact thrombolytic catheter of the present invention is a significant improvement over traditional methods. Compared with the high trauma and multiple complications of direct incision and thrombectomy, as well as the limited aspiration capacity of interventional thrombus aspiration and the easy thrombus detachment and damage to the inner wall of the lumen, the contact thrombolytic catheter of the present invention has the advantages of less trauma, better thrombolytic effect, less medication, and less damage to other parts. It provides a safer and more efficient option for the treatment of acute thrombosis, and has important clinical application value and broad application prospects.

[0036] The technical features of the above-described embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the technical features in the above-described embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification. The above-described embodiments only express several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the present invention, several variations and improvements can be made, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims.

Claims

1. A primary and secondary catheter type contact thrombolytic catheter, characterized in that: It comprises a main conduit, on which a spiral-shaped secondary conduit groove for winding the secondary conduit is arranged, and a plurality of spray holes are arranged on both the main conduit and the secondary conduit, and the secondary conduit is made of water-expandable rubber material.

2. A primary-secondary-catheter contact thrombolytic catheter according to claim 1, characterized in that: A medicine spraying hole is also arranged in the groove of the secondary conduit.

3. A primary-secondary-catheter contact thrombolytic catheter according to claim 1, characterized in that: A main catheter guide wire is arranged in the main catheter.

4. A primary-secondary-catheter contact thrombolytic catheter according to claim 1, characterized in that: An auxiliary catheter guide wire is arranged in the auxiliary catheter.

5. A primary-secondary-catheter contact thrombolytic catheter according to claim 1, characterized in that: The main conduit is made of medical silicone.

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