Multi-lumen medical catheter with elastic anti-extrusion structure and medical device

Abstract

This invention relates to the field of medical device technology and discloses a multi-lumen medical catheter and medical device with an elastic compression-resistant structure. The catheter body includes an elastic compression-resistant partition, which is disposed within the inner cavity of the catheter body. The partition separates the inner cavity of the catheter body into a first lumen and a second lumen. The cross-section of the partition is asymmetrically S-shaped, and the partition includes a first arch and a second arch connected sequentially along its width. The first and second arches have opposite bending directions. The connection point between the first and second arches is the inflection point: the wall thickness of the first arch gradually decreases from its apex to the inflection point; similarly, the wall thickness of the second arch gradually decreases from its apex to the inflection point. By using an elastic compression-resistant partition with uneven thickness, elastic support is formed, preventing sudden collapse and ensuring the lumen remains unobstructed under extreme compression, thus preventing disruption to normal use.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a multi-lumen medical catheter and medical device with an elastic, compression-resistant structure. Background Technology

[0002] Currently, multi-lumen medical catheters are mainly used in clinical scenarios where infusion, aspiration, or pressure monitoring needs to be performed simultaneously. Commercially available multi-lumen medical catheters generally use a straight plate or a symmetrical, equally thick corrugated septum structure inside to separate multiple independent lumens.

[0003] However, in actual clinical use, existing multi-lumen medical catheters are highly susceptible to strong external pressure, leading to luminal occlusion. For example, during central venous catheterization, the catheter needs to pass through the bony suture between the clavicle and the first rib. This anatomical gap is extremely narrow. When the patient's position changes or the bones close naturally, the catheter is subjected to high-intensity directional lateral clamping force (clinically known as "angle syndrome"). This force is not uniform surrounding water pressure, but rather a localized, high-intensity "pinch" generated by bone closure. Existing straight septa, when subjected to this type of directional pressure, will undergo "Euler buckling" like a slender straight rod—that is, sudden irreversible brittle bending or deadlock collapse, resulting in instantaneous and complete closure of the lumen. While symmetrical, uniformly thick corrugated septa offer some improvement, they can still fold and occlude at uncontrollable weak points under extreme pressure, and their compression resistance is far from meeting clinical needs.

[0004] Similar problems arise in other application scenarios: during extracorporeal membrane oxygenation (VV-ECMO) and hemodialysis, high negative pressure and high flow rates can cause the catheter to be strongly squeezed by external tissues; thoracic and abdominal drainage tubes may be compressed by surrounding organs or muscles; and neurointerventional guiding catheters often experience folding forces due to large-angle bending when navigating through tortuous cerebral blood vessels. All these compressions can lead to lumen failure, causing interruptions in emergency drug infusions or triggering the machine's high negative pressure alarm and shutdown.

[0005] While there are existing technologies that allow for simply increasing the pipe wall thickness to enhance pressure resistance, increasing the pipe wall thickness inevitably sacrifices valuable effective flow cross-sectional area and reduces flow rate.

[0006] Therefore, existing technologies still need to be improved and developed. Summary of the Invention

[0007] In view of the shortcomings of the prior art, the purpose of this invention is to provide a multi-lumen medical catheter and medical device with an elastic compression-resistant structure, in order to solve the problem that existing multi-lumen medical catheters are prone to brittle bending, resulting in lumen occlusion and unusability.

[0008] The technical solution of the present invention is as follows: A multi-lumen medical catheter with an elastic, compression-resistant structure, comprising: Catheter body; An elastic compression-resistant septum is disposed within the inner cavity of the catheter body; the elastic compression-resistant septum is used to separate the inner cavity of the catheter body into a first cavity and a second cavity, wherein the cross-sectional area of ​​the first cavity is larger than the cross-sectional area of ​​the second cavity; the cross-section of the elastic compression-resistant septum is asymmetrically S-shaped, and the elastic compression-resistant septum includes a first arch and a second arch connected sequentially along the width direction, wherein the bending directions of the first arch and the second arch are opposite; Wherein, the position where the first arch and the second arch are connected is the inflection point, and the elastic anti-compression partition is configured such that: along the arch top of the first arch to the inflection point, the wall thickness of the first arch gradually decreases; along the arch top of the second arch to the inflection point, the wall thickness of the second arch gradually decreases.

[0009] The multi-lumen medical catheter with an elastic compression-resistant structure has the same thickness at the top of the first arch and the top of the second arch, and the thickness at the inflection point is 50%-80% of the thickness at the top of the first arch.

[0010] The multi-lumen medical catheter with an elastic, compression-resistant structure has a first arch with a crown thickness of 0.2 mm and a concave point thickness of 0.12 mm.

[0011] The multi-lumen medical catheter with an elastic, compression-resistant structure, wherein the first arch protrudes toward the first lumen; the second arch protrudes toward the second lumen; and the radius of curvature of the first arch is greater than the radius of curvature of the second arch.

[0012] The multi-lumen medical catheter with an elastic, compression-resistant structure has a first arch with a radius of 1-1.5 mm and a second arch with a radius of 0.5-0.8 mm.

[0013] The multi-lumen medical catheter with an elastic compression-resistant structure has a first thickened anchor point formed at the end of the first arch facing away from the concave point, and the first thickened anchor point is connected to the inner wall of the catheter body; wherein the cross-sectional shape of the first thickened anchor point is teardrop-shaped, and the thickness of the first thickened anchor point is greater than the thickness of the first arch.

[0014] The multi-lumen medical catheter with an elastic compression-resistant structure has a second thickened anchor point formed at the end of the second arch facing away from the concave point, and the second thickened anchor point is connected to the inner wall of the catheter body; wherein the cross-sectional shape of the second thickened anchor point is teardrop-shaped, and the thickness of the second thickened anchor point is greater than the thickness of the second arch.

[0015] The multi-lumen medical catheter with an elastic compression-resistant structure is wherein the elastic compression-resistant septum and the catheter body are integrally formed by an extrusion molding process.

[0016] The multi-lumen medical catheter with an elastic, compression-resistant structure is wherein the catheter body is any one of a temperature-sensitive polyurethane elastomer, a temperature-sensitive polylactic acid tube, or a temperature-sensitive polycaprolactone tube.

[0017] This application also discloses a medical device, which includes a multi-lumen medical catheter with an elastic compression-resistant structure as described in any of the above.

[0018] Compared with the prior art, the embodiments of the present invention have the following advantages: The multi-lumen medical catheter with an elastic, compression-resistant structure disclosed in this invention can be applied to central venous catheters, peripherally inserted central venous catheters, extracorporeal membrane oxygenation (ECMO) double-lumen catheters, hemodialysis catheters, peripheral thrombus aspiration catheters, chest / abdominal drainage tubes, and neurointerventional guiding catheters, etc. In clinical practice, the multi-lumen medical catheter is inserted into a blood vessel, and infusion, aspiration, or pressure monitoring can be performed simultaneously through different lumens, reducing the damage caused by repeated skin punctures.

[0019] When a multi-lumen medical catheter passes through a narrow gap and is squeezed by the surrounding environment, the inflection point on the elastic compression-resistant septum deforms first. The first arch and the second arch pull on each other, thus bending simultaneously until the first arch changes from a C-shape to a U-shape. At this point, both sides of the first arch contact the inner wall of the catheter body, forming support, thereby increasing the overall structural strength and preventing the catheter body from collapsing further. At this time, the first and second lumens within the catheter body remain unobstructed, and the multi-lumen medical catheter can continue to be used.

[0020] It is evident that, compared to existing catheters which are prone to brittle fracture or deadlock collapse under extreme conditions, this invention, by setting an S-shaped elastic anti-compression septum, makes the catheter structurally stronger after deformation and keeps the internal lumen unobstructed, thus facilitating use, avoiding interruption of drug delivery, and also allowing for normal negative pressure aspiration operations to maintain normal use. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of the multi-lumen medical catheter with an elastic anti-compression structure in this invention; Figure 2 for Figure 1 Cross-sectional view along the AA' direction; Figure 3 This is a cross-sectional view of the multi-lumen medical catheter with an elastic compression-resistant structure in this invention under pressure.

[0023] Among them, 10 is the catheter body; 11 is the first lumen; 12 is the second lumen; 20 is the elastic anti-compression septum; 21 is the first arch; 211 is the first thickened anchor point; 22 is the second arch; 221 is the second thickened anchor point; and 23 is the concave point. Detailed Implementation

[0024] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Variations in the shapes shown in the accompanying drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the accompanying drawings, but include variations in shape that may occur during manufacturing. As used herein, the term “and / or” includes any one of the relevant items listed and any combination of any two or more of them.

[0026] Although terms such as “first,” “second,” and “third” may be used herein to describe individual components, assemblies, regions, layers, or parts, these components, assemblies, regions, layers, or parts are not limited by these terms. Rather, these terms are used only to distinguish one component, assembly, region, layer, or part from another. Therefore, without departing from the teachings of the examples described herein, the first component, assembly, region, layer, or part referred to as the second component, assembly, region, layer, or part may also be referred to as the second component, assembly, region, layer, or part.

[0027] For ease of description, spatial relational terms such as “above,” “upper,” “below,” and “lower” are used herein to describe the relationship between one element and another, as shown in the accompanying drawings. Such spatial relational terms are intended to encompass not only the orientation depicted in the drawings but also different orientations of the device during use or operation. For example, if the device in the drawings is flipped, an element described as being “above” or “upper” relative to another element will subsequently be “below” or “lower” relative to that other element. Therefore, the term “above” includes both “above” and “below” orientations depending on the spatial orientation of the device. The device may also be positioned in other ways, and the spatial relational terms used herein will be interpreted accordingly.

[0028] The terminology used herein is for the purpose of describing various examples only and is not intended to limit this disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms “comprising,” “including,” and “having” enumerate the stated features, quantities, operations, components, elements, and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0029] See Figure 1 , Figure 2 and Figure 3 In one embodiment of this invention application, a multi-lumen medical catheter with an elastic compression-resistant structure is disclosed, comprising a catheter body 10 and an elastic compression-resistant partition 20, wherein the elastic compression-resistant partition 20 is disposed in the inner cavity of the catheter body 10; the elastic compression-resistant partition 20 is used to separate the inner cavity of the catheter body 10 into a first lumen 11 and a second lumen 12, wherein the cross-sectional area of ​​the first lumen 11 is larger than the cross-sectional area of ​​the second lumen 12.

[0030] The multi-lumen medical catheter with an elastic, compression-resistant structure disclosed in this embodiment can be applied to central venous catheters (CVCs), peripherally inserted central venous catheters (PICCs), extracorporeal membrane oxygenation (ECMO) double-lumen catheters, hemodialysis catheters, peripheral thrombus aspiration catheters, chest / abdominal drainage tubes, and neurointerventional guiding catheters. In clinical practice, the multi-lumen medical catheter is inserted into a blood vessel and divided into different lumens by the elastic, compression-resistant septum 20, allowing for simultaneous infusion, aspiration, or pressure monitoring, reducing the damage caused by repeated skin punctures.

[0031] In this embodiment, the number of elastic anti-compression baffles 20 can be set to one to separate and form a first lumen 11 and a second lumen 12; in other embodiments of this embodiment, the number of elastic anti-compression baffles 20 can be set to multiple, arranged in parallel within the catheter body 10, or spaced apart circumferentially along the inner lumen of the catheter, to separate multiple first lumens 11 and multiple second lumens 12, thereby enabling more infusion, aspiration or monitoring operations, increasing the diversity of functions and facilitating use.

[0032] like Figure 2 As shown, the cross-section of the elastic compression-resistant partition 20 disclosed in this embodiment is asymmetrical S-shaped. The elastic compression-resistant partition 20 includes a first arch 21 and a second arch 22 connected sequentially along the width direction. The first arch 21 and the second arch 22 have opposite bending directions. The position where the first arch 21 and the second arch 22 are connected is the inflection point 23. The elastic compression-resistant partition 20 is configured such that: along the arch top of the first arch 21 to the inflection point 23, the wall thickness of the first arch 21 gradually decreases; along the arch top of the second arch 22 to the inflection point 23, the wall thickness of the second arch 22 gradually decreases.

[0033] When a multi-lumen medical catheter passes through a narrow gap and is compressed by the surrounding environment, the inflection point 23 on the elastic compression-resistant septum 20 has the smallest thickness, and therefore deforms first, causing the first arch 21 and the second arch 22 to intersect, while simultaneously generating a tendency to move towards the center of the catheter. However, the inflection point 23 is the connection point between the first arch 21 and the second arch 22, so the first arch 21 and the second arch 22 pull against each other, causing the first arch 21 and the second arch 22 to bend simultaneously until the first arch 21 changes from a C-shape to a U-shape.

[0034] like Figure 3 As shown, both sides of the first arch 21 contact the inner wall of the catheter body 10, forming a support, thereby increasing the overall structural strength and preventing the catheter body 10 from collapsing further. Based on this, the first lumen 11 and the second lumen 12 within the catheter body 10 remain patent, and the multi-lumen medical catheter can continue to be used.

[0035] As can be seen, compared to existing catheters that are prone to brittle fracture or deadlock collapse under extreme conditions, this embodiment, by setting an S-shaped elastic anti-compression septum 20, makes the catheter structurally stronger after deformation and maintains the patency of the internal lumen, thus facilitating use, avoiding interruption of drug delivery, and allowing for normal negative pressure aspiration operations to maintain normal use. In addition, since the first arch 21 and the second arch 22 are both U-shaped and compressed inside the catheter, they support each other and absorb the compressive force, further increasing the pressure resistance. This asymmetrical double-arch S-shaped structure is like a "corrugated spring" inside the catheter. Even if the direction of external pressure is deflected, its mechanical redundancy against crushing and torsion in all directions is exponentially higher than that of traditional flat septums, reducing the risk of death from pressure fracture in all directions due to uncertain patient positioning.

[0036] Specifically, after passing through a narrow space, the rebound force of the first arch 21 and the second arch 22 will support the guide tube body 10, allowing the guide tube body 10 to return to its original shape. The first arch 21 and the second arch 22 will return to their original curvature and maintain support for the guide rail body.

[0037] In other words, the multi-lumen medical catheter disclosed in this embodiment can be inserted into blood vessels for a long time. Under repeated external force, it can be continuously compressed and expanded, and the lumen can be kept unobstructed. This resolves the structural fatigue caused by repeated compression and extends the service life of the catheter.

[0038] In summary, the multi-lumen medical catheter with an elastic anti-compression structure disclosed in this embodiment uses an S-shaped elastic anti-compression support for the catheter body 10 and a thin inflection point 23 to form a soft hinge similar to a "crease." This allows the catheter to fold regularly from the inflection point 23 when under stress. Compared to the random folding of traditional equal-wall-thickness septa, the first arch 21 and the second arch 22 disclosed in this embodiment can bend safely along a designed path. Whether dealing with the rigid compression of skeletal muscles (such as PICC, CVC, and drainage tubes) or the collapse and folding of the lumen caused by high negative pressure and large-angle bending (such as ECMO catheters, thrombus aspiration catheters, and neurointerventional catheters), this internal adaptive deformation mechanism provides channel maintenance capability, breaking through the physical throughput bottleneck of existing catheters.

[0039] Specifically, as another embodiment of this application, it is disclosed that the thickness of the arch crown of the first arch 21 and the arch crown of the second arch 22 are equal. In this embodiment, the thickness of the first arch 21 and the second arch 22 at the arch crown are equal, and their structural strengths are similar. When the first arch 21 and the second arch 22 bend, they can bend simultaneously with similar degrees of bending to achieve the effect of mutual support.

[0040] In this embodiment, the thickness of the inflection point 23 is 50%-80% of the thickness at the top of the first arch 21. The thickness of the inflection point 23 does not exceed 80% of the thickness of the first arch 21 and the second arch 22, so that when subjected to external pressure, directional bending occurs first at the location of the inflection point 23, allowing the conduit to produce regular bending movements under extreme pressure, maintaining the patency of the lumen. The thickness of the inflection point 23 disclosed in this embodiment cannot be too small either. If the thickness is less than 50% of that at the top of the first arch 21, the risk of breakage increases, potentially causing communication problems between the first lumen 11 and the second lumen 12.

[0041] Specifically, as another embodiment of this application, the thickness of the dome of the first arch 21 is disclosed to be 0.2 mm; the thickness of the inflection point 23 is 0.12 mm. The multi-lumen medical catheter disclosed in this embodiment is suitable for different clinical work scenarios, but since they are all inserted into blood vessels, the diameter and wall thickness of the catheter body 10 are limited. Therefore, the thickness of the elastic anti-compression septum 20 is also limited. The thickness of the dome of the first arch 21 is 0.2 mm, which can be applied to most catheters to achieve stable support for the catheter. Based on this, the thickness of the inflection point 23 can be set to 0.12 mm to maintain the connection between the first arch 21 and the second arch 22.

[0042] It should be noted that this embodiment only illustrates the thickness values ​​of the first arch 21, the second arch 22, and the inflection point 23, but the scope of protection of the present invention is not limited thereto. Other thickness values ​​can also be set for the first arch 21, the second arch 22, and the inflection point 23. As long as the technical effect disclosed in this application can be achieved, as an equivalent substitution of the concept of the present invention, it should also be within the scope of protection of this application.

[0043] Specifically, as another embodiment of this application, the first arch 21 protrudes toward the first lumen 11; the second arch 22 protrudes toward the second lumen 12; and the radius of curvature of the first arch 21 is greater than the radius of curvature of the second arch 22.

[0044] In this embodiment, the first lumen 11 has a larger cross-sectional area, meaning more space. Therefore, a first arch 21 with a larger radius of curvature is provided to bulge towards the first lumen 11, and a second arch 22 with a smaller radius of curvature bulges towards the second lumen 12. When the first arch 21 is bent under pressure, it folds within the first lumen 11, providing more space and making folding smoother, thus avoiding contact with the inner wall of the catheter body 10. Similarly, the second arch 22 folds within the second lumen 12, also providing sufficient space.

[0045] Specifically, in this embodiment, the cross-sectional areas of the first lumen 11 and the second lumen 12 are different, which can adapt to different fluid flow requirements. For example, when a large amount of fluid needs to be infused, the fluid can be injected through the first lumen 11, and when a small amount needs to be aspirated, it can be aspirated through the second lumen 12. Therefore, it can meet a variety of clinical needs and improve work efficiency.

[0046] In this embodiment, the radius of curvature of the first arch 21 is different from that of the second arch 22. Under pressure, it produces asymmetrical elastic deformation, allowing them to fold together and create a nesting effect, similar to a "Russian doll." Specifically, the second arch 22 folds into the recess of the first arch 21, thus the first arch 21 and the second arch 22 are superimposed and nested together, forming a stable, multi-layered, coiled support cylinder structure with a triangular cross-section. Under extreme pressure, this provides good support for the catheter body 10, reducing the possibility of complete collapse or breakage and maintaining the patency of the first lumen 11 and the second lumen 12.

[0047] Specifically, as another embodiment of this application, the radius of the first arch 21 is disclosed to be 1-1.5 mm; the radius of the second arch 22 is 0.5-0.8 mm. The first arch 21 and the second arch 22 together form an S-shaped elastic anti-compression baffle 20, and the different radii of the two can match the inner diameter of the conduit in actual working scenarios.

[0048] like Figure 3 As shown, in another embodiment of this application, a first thickened anchor point 211 is formed on the end of the first arch 21 away from the concave point 23, and the first thickened anchor point 211 is connected to the inner wall of the conduit body 10; wherein, the cross-sectional shape of the first thickened anchor point 211 is teardrop-shaped, and the thickness of the first thickened anchor point 211 is greater than the thickness of the first arch 21.

[0049] In this embodiment, the end of the first arch 21 facing away from the inflection point 23 is connected to the inner wall of the conduit body 10. The first thickened anchor point 211 is thicker and teardrop-shaped, so the contact area with the conduit body 10 is larger, which is beneficial to increase the stability of the connection and the compressive strength of the connection. The structural strength at the first thickened anchor point 211 is greater than the structural strength at the inflection point 23. When the conduit body 10 is subjected to pressure, the first thickened anchor point 211 will not bend, and the pressure can be better transmitted to the inflection point 23, so that the elastic anti-compression partition 20 can be folded regularly.

[0050] Specifically, as another embodiment of this application, a second thickened anchor point 221 is formed at the end of the second arch 22 opposite to the concave point 23. The second thickened anchor point 221 is connected to the inner wall of the catheter body 10. The cross-sectional shape of the second thickened anchor point 221 is teardrop-shaped, and the thickness of the second thickened anchor point 221 is greater than the thickness of the second arch 22. The second thickened anchor point 221 disclosed in this embodiment can increase the connection strength between the second arch 22 and the catheter body 10 and transmit pressure.

[0051] Specifically, as another embodiment of this application, the elastic anti-compression partition 20 and the catheter body 10 are integrally formed by an extrusion molding process. The multi-lumen medical catheter disclosed in this embodiment has a small diameter and high hygiene and safety requirements; therefore, integral forming via an automated extrusion process helps save costs and improve product quality.

[0052] In other embodiments of this example, the elastic anti-compression partition 20 can also be connected to the conduit body 10 by bonding or welding, and can be flexibly selected according to the cost and difficulty of the actual manufacturing process.

[0053] Specifically, as another embodiment of this application, the catheter body 10 is disclosed to be any one of temperature-sensitive polyurethane elastomer, temperature-sensitive polylactic acid tube, and temperature-sensitive polycaprolactone tube. The temperature-sensitive material disclosed in this embodiment has the characteristic that its physical properties (mainly volume or shape) can undergo reversible changes with temperature, so as to realize intelligent and gentle operation that is difficult to achieve with traditional catheters.

[0054] For example, the Shore hardness of temperature-sensitive polyurethane elastomer is higher at 25°C than at 37°C. In other words, the catheter body 10 is a solid material that is easy to implant at room temperature, but it can soften or deform after entering the body (about 37°C), thereby reducing trauma and adapting to the complex vascular environment.

[0055] It should be noted that this embodiment only lists the types of catheter bodies 10, but the scope of protection of the present invention is not limited to this. Other types of catheter bodies 10, as long as they can achieve the technical effects disclosed in this application, can be used as equivalent replacements for the concept of the present invention and should also be within the scope of protection of this application.

[0056] As another embodiment of this application, a medical device is also disclosed, which includes a multi-lumen medical catheter with an elastic compression-resistant structure as described above.

[0057] In summary, this application discloses a multi-lumen medical catheter with an elastic anti-compression structure, comprising a catheter body 10 and an elastic anti-compression partition 20, wherein the elastic anti-compression partition 20 is disposed within the inner cavity of the catheter body 10; the elastic anti-compression partition 20 is used to separate the inner cavity of the catheter body 10 into a first lumen 11 and a second lumen 12, wherein the cross-sectional area of ​​the first lumen 11 is larger than the cross-sectional area of ​​the second lumen 12; the cross-section of the elastic anti-compression partition 20 is asymmetrically S-shaped, and the elastic... The elastic compression-resistant septum 20 includes a first arch 21 and a second arch 22 connected sequentially along its width. The first arch 21 and the second arch 22 have opposite bending directions. The connection point between the first arch 21 and the second arch 22 is the inflection point 23. The elastic compression-resistant septum 20 is configured such that the wall thickness of the first arch 21 gradually decreases from the arch apex to the inflection point 23; and the wall thickness of the second arch 22 gradually decreases from the arch apex to the inflection point 23. Compared to existing catheters that are prone to brittle fracture or deadlock collapse under extreme conditions, this embodiment, by setting an S-shaped elastic compression-resistant septum 20, makes the catheter structurally stronger after deformation and maintains the patency of the internal lumen, thus facilitating use, avoiding interruption of drug delivery, and allowing for normal negative pressure aspiration operations to maintain normal use.

[0058] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0059] It should be noted that this invention uses a multi-lumen medical catheter and medical device with an elastic compression-resistant structure as an example to introduce the specific structure and working principle of the invention. However, the application of this invention is not limited to multi-lumen medical catheters and medical devices with an elastic compression-resistant structure, and can also be applied to the production and use of other similar workpieces.

[0060] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

[0061] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A multi-lumen medical catheter with an elastic, compression-resistant structure, characterized in that, include: Catheter body (10); An elastic anti-compression partition (20) is disposed in the inner cavity of the catheter body (10); the elastic anti-compression partition (20) is used to separate the inner cavity of the catheter body (10) into a first lumen (11) and a second lumen (12), the cross-sectional area of ​​the first lumen (11) is larger than the cross-sectional area of ​​the second lumen (12); the cross-section of the elastic anti-compression partition (20) is asymmetrical S-shaped, and the elastic anti-compression partition (20) includes a first arch (21) and a second arch (22) connected in sequence along the width direction, the bending directions of the first arch (21) and the second arch (22) are opposite; Wherein, the position where the first arch (21) and the second arch (22) are connected is the inflection point (23), and the elastic anti-compression partition (20) is configured such that: along the arch top of the first arch (21) to the inflection point (23), the wall thickness of the first arch (21) gradually decreases; along the arch top of the second arch (22) to the inflection point (23), the wall thickness of the second arch (22) gradually decreases.

2. The multi-lumen medical catheter with an elastic, compression-resistant structure according to claim 1, characterized in that, The thickness of the crown of the first arch (21) and the crown of the second arch (22) are equal, and the thickness of the inflection point (23) is 50%-80% of the thickness at the crown of the first arch (21).

3. The multi-lumen medical catheter with an elastic, compression-resistant structure according to claim 2, characterized in that, The thickness of the arch top of the first arch (21) is 0.2 mm; the thickness of the inflection point (23) is 0.12 mm.

4. The multi-lumen medical catheter with an elastic, compression-resistant structure according to claim 1, characterized in that, The first arch (21) protrudes toward the first lumen (11); the second arch (22) protrudes toward the second lumen (12); the radius of curvature of the first arch (21) is greater than the radius of curvature of the second arch (22).

5. The multi-lumen medical catheter with an elastic, compression-resistant structure according to claim 4, characterized in that, The radius of the first arch (21) is 1-1.5 mm; the radius of the second arch (22) is 0.5-0.8 mm.

6. The multi-lumen medical catheter with an elastic, compression-resistant structure according to claim 1, characterized in that, A first thickened anchor point (211) is formed on the end of the first arch (21) away from the concave point (23), and the first thickened anchor point (211) is connected to the inner wall of the conduit body (10); wherein, the cross-sectional shape of the first thickened anchor point (211) is teardrop-shaped, and the thickness of the first thickened anchor point (211) is greater than the thickness of the first arch (21).

7. The multi-lumen medical catheter with an elastic, compression-resistant structure according to claim 1, characterized in that, A second thickened anchor point (221) is formed on the end of the second arch (22) away from the concave point (23), and the second thickened anchor point (221) is connected to the inner wall of the conduit body (10); wherein, the cross-sectional shape of the second thickened anchor point (221) is teardrop-shaped, and the thickness of the second thickened anchor point (221) is greater than the thickness of the second arch (22).

8. The multi-lumen medical catheter with an elastic, compression-resistant structure according to claim 1, characterized in that, The elastic anti-compression partition (20) and the conduit body (10) are integrally formed by extrusion molding.

9. The multi-lumen medical catheter with an elastic, compression-resistant structure according to any one of claims 1 to 8, characterized in that, The catheter body (10) is any one of temperature-sensitive polyurethane elastomer, temperature-sensitive polylactic acid tube, and temperature-sensitive polycaprolactone tube.

10. A medical device, characterized in that, Including the multi-lumen medical catheter with an elastic compression-resistant structure as described in any one of claims 1 to 9.

Images