Curled multi-ring perfusion catheter

Abstract

The utility model discloses a curled multi-ring perfusion catheter, and relates to the technical field of medical instruments. Comprising a catheter base, a catheter handle installed on the catheter base, a perfusion catheter body connected to the far end of the catheter handle and a hose connected to the far end of the perfusion catheter body. At least two developing rings are arranged on the perfusion catheter at intervals, and a perfusion hole is formed in the far end of the perfusion catheter body; the distal end of the hose curls at least 270 degrees toward the proximal end of the perfusion catheter body. The far end of the hose is curled towards the near end of the perfusion catheter body by at least 270 degrees, so that the hose can be curled into a hook shape at least, the catheter can flexibly turn in a target pipeline conveniently, and the catheter can reach a target area more easily; meanwhile, due to the fact that the flexible pipe is curled into the hook shape, the flexible pipe can be better attached to the pipe wall at the intersection position and the bending position of a target pipeline, the position of the catheter can be stabilized conveniently, and the catheter can conduct local blood flow pressure measurement and medicine perfusion more accurately.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a coiled multi-ring perfusion catheter. Background Technology

[0002] With the development of medical technology, endovascular interventional diagnostic and therapeutic techniques have become increasingly complex and sophisticated. Accurately locating the catheter within the blood vessel is crucial in endovascular procedures. Traditional single-marker catheters are insufficient for precise location determination in some complex surgical scenarios. To improve the accuracy of catheter positioning, multi-ring catheters have emerged.

[0003] For example, CN114948085B discloses an infusion catheter, which is a straight catheter. Straight catheters are a commonly used basic catheter type in vascular intervention. However, straight catheters have compliance issues: their straight structure makes them less flexible when passing through tortuous blood vessels. When encountering blood vessels with significant tortuosity, such as in cerebrovascular interventional surgery, where the vessel has multiple tortuous branches, the catheter may have difficulty passing through smoothly. Forcing its way through may cause damage to the vascular endothelium or even complications such as vasospasm. Utility Model Content

[0004] Therefore, this invention aims to solve the problem that straight catheters in the prior art lack flexibility when passing through tortuous blood vessels and are prone to causing damage to the vascular intima, thereby providing a coiled multi-ring perfusion catheter.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0006] A coiled multi-ring perfusion catheter includes a catheter seat, a catheter handle mounted on the catheter seat, an perfusion catheter body connected to the distal end of the catheter handle, and a flexible tube connected to the distal end of the perfusion catheter body; at least two radiopaque rings are spaced apart on the perfusion catheter, and an perfusion hole is formed on the distal end of the perfusion catheter body; the distal end of the flexible tube is coiled at least 270° toward the proximal end of the perfusion catheter body.

[0007] Furthermore, the distal end of the coiled hose is located on one side of the proximal end of the hose, and there is a gap between the distal end of the hose and the proximal end of the hose.

[0008] Furthermore, the distal end of the hose is first bent at 30°-60°, and then bent in the opposite direction of the first bend at 270°-350°.

[0009] Furthermore, the distal end of the tubing is curled 270°-300° toward the proximal end of the infusion catheter body, and the distal end of the tubing also has an extension section that extends horizontally toward the proximal end of the infusion catheter body, and the extension section is parallel to the infusion catheter body.

[0010] Furthermore, the proximal end of the tubing is straight and coaxially arranged with the infusion catheter body; the distal end of the tubing is curled 360° toward the proximal end of the infusion catheter body to form an open loop, and the distal end of the tubing is located within the loop.

[0011] Furthermore, the distal end of the tubing is curled 300°-330° toward the proximal end of the infusion catheter body to form a hook shape, and the distal end of the tubing is bent and extended toward the inside of the formed hook shape to form a straight section.

[0012] Furthermore, the tubing is inclined at 140-160° and connected to the distal end of the infusion catheter body to form an inclined section, with the hook-shaped portion of the tubing located at the distal end of the inclined section.

[0013] Furthermore, the body of the infusion catheter is made of pebax material (polyether amide elastomer material).

[0014] Furthermore, the length of the hose is 20-60mm.

[0015] Furthermore, the main body of the infusion conduit has a plurality of infusion holes, and the plurality of infusion holes are distributed in a spiral shape.

[0016] The technical solution of this utility model has the following advantages:

[0017] 1. The coiled multi-ring perfusion catheter provided by this utility model can be coiled into a hook shape by coiling the distal end of the tubing towards the proximal end of the perfusion catheter body by at least 270°, which facilitates the flexible turning of the catheter within the target channel and makes it easier to reach the target area; at the same time, this hook-shaped setting allows the tubing to better fit the tube wall at the intersection and bend of the target channel, which helps to stabilize the catheter position and enables the catheter to more accurately measure local blood flow pressure and perfuse drugs.

[0018] 2. The coiled multi-ring perfusion catheter provided by this utility model has its distal end of the coiled tubing located on one side of the proximal end of the tubing, with a gap between the distal and proximal ends. This design ensures that the two ends of the coiled tubing do not overlap or cross on a plane, allowing the tubing to rapidly push large amounts of fluid to the target vascular area within a short time. This is suitable for scenarios requiring rapid, large-volume infusion of drugs or contrast agents.

[0019] 3. The coiled multi-ring perfusion catheter provided by this utility model features an initial bend of 30°-60° at the distal end of the tubing, followed by a reverse bend of 270°-350° in the direction of the initial bend. This bidirectional bending allows the tubing to adapt to target channels that have branching and further bends, enabling flexible advancement within such complex channels. It also allows the tubing to better conform to the branching and bends of the target channel, reducing damage to the vessel wall, improving the maneuverability of the perfusion catheter in complex channels, and making it easier to reach the target location.

[0020] 4. The coiled multi-ring perfusion catheter provided by this utility model has its distal end coiled 270°-300° towards the proximal end of the perfusion catheter body. The distal end of the catheter also has an extension section extending horizontally towards the proximal end of the perfusion catheter body, and this extension section is parallel to the perfusion catheter body. This design allows the catheter to have both a hook-shaped portion and a straight portion. In areas where the target conduit has bends or numerous branches, the hook-shaped portion can better conform to the vessel wall; the straight portion of the catheter can adapt to diverse and complex conduits where the target conduit becomes straight after bending, and it is also easier to stabilize the catheter position after bending.

[0021] 5. The coiled multi-ring infusion catheter provided by this utility model has a straight proximal end of the tubing, which is coaxially arranged with the main body of the infusion catheter. The distal end of the tubing is coiled 360° towards the proximal end of the main body of the infusion catheter to form an open loop, and the distal end of the tubing is located within the loop. This design allows the infusion catheter to have the directness and accuracy of a straight catheter, as well as the flushing and injection capabilities of a curved catheter in a larger diameter tube. It is suitable for application scenarios that require both straight and curved catheters, such as applications with larger diameters that require rapid drug infusion and simultaneous monitoring.

[0022] 6. The coiled multi-ring infusion catheter provided by this utility model has its distal end coiled 300°-330° towards the proximal end of the infusion catheter body to form a hook shape, and the distal end of the hose is then bent and extended inward towards the formed hook shape to form a straight section. This design, where the distal end of the hose is coiled into a hook shape and then bent again, makes it more suitable for complex and winding target pipelines, ensuring that the tip of the infusion catheter is in a suitable position within the target pipeline and avoiding direct damage to the inner lining of the target pipeline by the tip of the infusion catheter.

[0023] 7. The coiled multi-ring perfusion catheter provided by this utility model has a flexible tube connected at an incline of 140-160° to the distal end of the perfusion catheter body to form an inclined section, with the hook-shaped portion of the flexible tube located at the distal end of the inclined section. This design avoids bending of the perfusion catheter in the target tubing, prevents direct intimal damage to the target tubing, and reduces recoil force during forceful injection of contrast agent. Attached Figure Description

[0024] 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.

[0025] Figure 1 This is a schematic diagram of the structure of the coiled multi-ring infusion catheter provided in Embodiment 1 of this utility model;

[0026] Figure 2 This is a schematic diagram of the structure of the coiled multi-ring infusion catheter provided in Embodiment 2 of this utility model;

[0027] Figure 3 This is a schematic diagram of the structure of the coiled multi-ring infusion catheter provided in Embodiment 3 of this utility model;

[0028] Figure 4 This is a schematic diagram of the structure of the coiled multi-ring infusion catheter provided in Embodiment 4 of this utility model;

[0029] Figure 5 This is a schematic diagram of the structure of the coiled multi-ring infusion catheter provided in Embodiment 5 of this utility model.

[0030] Explanation of reference numerals in the attached drawings: 1. Catheter seat; 2. Catheter handle; 3. Infusion catheter body; 4. Tube; 5. Imaging ring; 6. Infusion port; 7. Extension section; 8. Straight section; 9. Inclined section. 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 term "proximal end" refers to the end closer to the practitioner, and "distal end" refers to the end farther from the practitioner; the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship 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] Example 1

[0036] like Figure 1 The illustrated coiled multi-ring perfusion catheter includes a catheter seat, a catheter handle mounted on the catheter seat, a perfusion catheter body connected to the distal end of the catheter handle, and a flexible tube connected to the distal end of the perfusion catheter body; at least two imaging rings are spaced apart on the perfusion catheter, and an perfusion hole is opened on the distal end of the perfusion catheter body; the distal end of the flexible tube is coiled at least 270° toward the proximal end of the perfusion catheter body.

[0037] This coiled multi-ring perfusion catheter, by coiling the distal end of the tubing at least 270° towards the proximal end of the catheter body, can coil the tubing into a hook shape, facilitating flexible turning of the catheter within the target channel and making it easier to reach the target area. At the same time, this hook-shaped design allows the tubing to better conform to the tube wall at intersections and bends in the target channel, facilitating catheter positioning and enabling more accurate local blood flow pressure measurement and drug perfusion.

[0038] In this embodiment, the distal end of the coiled tubing is located to one side of the proximal end, and there is a gap between the distal and proximal ends. This configuration ensures that the two ends of the coiled tubing do not overlap or cross on a plane, allowing the tubing to rapidly deliver large amounts of fluid to the target blood vessel area within a short time. This is suitable for scenarios requiring rapid, large-volume infusion of drugs or contrast agents.

[0039] Specifically, the distal end of the tubing is first bent 345°, then bent 300° in the opposite direction of the first bend. This bidirectional bending allows the tubing to adapt to target channels that have bifurcations and further bends, enabling the tubing to move flexibly within such complex channels. It also allows the tubing to better conform to the bifurcated and bendable target channel, reducing damage to the vessel wall, improving the maneuverability of the infusion catheter in complex channels, and making it easier for the infusion catheter to reach the target location.

[0040] In this embodiment, the infusion catheter body is made of Pebax material (polyetheramide elastomer material). The length of the tubing is 45 mm, and the hardness of the tubing is 72D.

[0041] In this embodiment, the main body of the infusion catheter is provided with 5 infusion holes arranged in a spiral shape. The distance between two adjacent infusion holes is 2.5 mm, the diameter of the infusion hole is 0.65 mm, and the infusion hole located at the far end of the main body of the infusion catheter is 50 mm away from the far end of the main body of the infusion catheter.

[0042] In an alternative embodiment, the infusion catheter body is provided with 6 spirally distributed infusion holes, the distance between two adjacent infusion holes is 2.5 mm, the diameter of the infusion hole is 0.65 mm, and the infusion hole located at the far end of the infusion catheter body is 50 mm away from the far end of the infusion catheter body.

[0043] In an alternative embodiment, the diameter of the injection hole can be adjusted between 0.5 and 0.65 mm as needed.

[0044] In an alternative embodiment, the infusion catheter body is provided with 10 spirally distributed infusion holes, the distance between two adjacent infusion holes is 2.5 mm, the diameter of the infusion hole is 0.5 mm, and the infusion hole located at the distal end of the infusion catheter body is 50 mm away from the distal end of the infusion catheter body.

[0045] In this embodiment, two contrast rings are also provided at the distal end of the perfusion catheter body, with a distance of 20 mm between the two contrast rings.

[0046] In an alternative embodiment, 11 radiopaque rings may be provided on the body of the infusion catheter, with a spacing of 10 mm between two adjacent radiopaque rings.

[0047] In an alternative embodiment, 16 radiopaque rings may be provided on the body of the infusion catheter, with a spacing of 20 mm between two adjacent radiopaque rings.

[0048] In an alternative embodiment, 20 radiopaque rings may be provided on the body of the infusion catheter, with a spacing of 10 mm or 20 mm between adjacent radiopaque rings.

[0049] Example 2:

[0050] like Figure 2 As shown, the difference from Embodiment 1 is that the distal end of the tubing is coiled 280° towards the proximal end of the infusion catheter body. The distal end of the tubing also has an extension section extending horizontally towards the proximal end of the infusion catheter body, and this extension section is parallel to the infusion catheter body. Specifically, the length of the extension section is 2 mm. This design allows the tubing to have both a hook-shaped portion and a straight portion. In areas where the target conduit has bends or numerous branches, the hook-shaped portion can better conform to the vessel wall; the straight portion of the tubing can adapt to diverse and complex conduits where the target conduit becomes straight after bending, and it is also easier to stabilize the catheter position after bending.

[0051] In this embodiment, the infusion catheter body is provided with 5 infusion holes, the distance between two adjacent infusion holes is 2.5 mm, the diameter of the infusion hole is 0.5 mm, and the infusion hole located at the far end of the infusion catheter body is 20 mm away from the far end of the infusion catheter body.

[0052] In an alternative embodiment, the infusion catheter body is provided with 6 spirally distributed infusion holes, the distance between two adjacent infusion holes is 2.5 mm, the diameter of the infusion hole is 0.65 mm, and the infusion hole located at the far end of the infusion catheter body is 50 mm away from the far end of the infusion catheter body.

[0053] In an alternative embodiment, the diameter of the injection hole can be adjusted between 0.5 and 0.65 mm as needed.

[0054] In an alternative embodiment, the infusion catheter body is provided with 10 spirally distributed infusion holes, the distance between two adjacent infusion holes is 2.5 mm, the diameter of the infusion hole is 0.5 mm, and the infusion hole located at the distal end of the infusion catheter body is 50 mm away from the distal end of the infusion catheter body.

[0055] In this embodiment, two contrast rings are also provided at the distal end of the perfusion catheter body, with a distance of 20 mm between the two contrast rings.

[0056] Example 3:

[0057] like Figure 3As shown, the difference from Embodiment 1 is that the proximal end of the tubing is straight and coaxially arranged with the main body of the infusion catheter; the distal end of the tubing is coiled 360° towards the proximal end of the infusion catheter main body to form an open loop, and the distal end of the tubing is located within the loop. This configuration allows the infusion catheter to have the directness and accuracy of a straight catheter, as well as the flushing and injection capabilities of a curved catheter in larger diameter tubing. It is suitable for applications that require both straight and curved catheters, such as applications with larger diameters that require rapid drug infusion and simultaneous monitoring.

[0058] Example 4:

[0059] like Figure 4 As shown, the difference from Embodiment 1 is that the distal end of the tubing is curled 310° towards the proximal end of the infusion catheter body to form a hook shape, and then the distal end of the tubing is bent inward towards the formed hook shape to form a straight section. Specifically, the length of the straight section is 5.5 mm. This design, where the distal end of the tubing is curled into a hook shape and then bent again, is more suitable for complex and winding target pipelines. It ensures that the tip of the infusion catheter is positioned appropriately within the target pipeline, avoiding direct damage to the inner lining of the target pipeline from the tip of the infusion catheter.

[0060] Example 5:

[0061] like Figure 5 As shown, the difference from Embodiment 4 is that the tubing is connected at a 150° angle to the distal end of the infusion catheter body to form an inclined section, with the hook-shaped portion of the tubing located at the distal end of the inclined section. Specifically, the inclination angle between the inclined section and the proximal end of the infusion catheter body is 155°. This configuration avoids bending of the infusion catheter in the target tubing, prevents direct intimal damage to the target tubing, and reduces recoil during forceful injection of contrast agent.

[0062] In summary, this coiled multi-ring perfusion catheter, by coiling the distal end of the tubing at least 270° towards the proximal end of the catheter body, can coil the tubing into a hook shape, facilitating flexible turning of the catheter within the target channel and making it easier to reach the target area. At the same time, this hook-shaped design allows the tubing to better conform to the tube wall at intersections and bends in the target channel, facilitating catheter positioning and enabling more accurate local blood flow pressure measurement and drug perfusion.

[0063] 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 coiled multi-ring perfusion catheter, characterized in that, The perfusion catheter comprises a catheter seat, a catheter handle mounted on the catheter seat, a perfusion catheter body connected to the distal end of the catheter handle, and a hose connected to the distal end of the perfusion catheter body; at least two developing rings are arranged on the perfusion catheter at intervals, a perfusion hole is arranged on the distal end of the perfusion catheter body, and the distal end of the hose is curled towards the proximal end of the perfusion catheter body by at least 270°.

2. The coiled multi-ring perfusion catheter of claim 1, wherein, The distal end of the curled hose is located on one side of the proximal end of the hose, and there is a gap between the distal end and the proximal end of the hose.

3. The coiled multi-ring perfusion catheter of claim 2, wherein, The distal end of the hose is first bent by 30-60°, and then reversely bent by 270-350° towards the direction of the first bending.

4. The coiled multi-ring perfusion catheter of claim 1, wherein, The distal end of the hose is curled by 270-300° towards the proximal end of the perfusion catheter body, the distal end of the hose also has an extension segment extending horizontally towards the proximal end of the perfusion catheter body, and the extension segment is parallel to the perfusion catheter body.

5. The coiled multi-ring perfusion catheter of claim 1, wherein, The proximal end of the hose is straight and coaxially arranged with the perfusion catheter body; the distal end of the hose is curled by 360° towards the proximal end of the perfusion catheter body to form a ring with an opening, and the distal end of the hose is located inside the ring.

6. The coiled multi-ring perfusion catheter of claim 1, wherein, The distal end of the hose is curled by 300-330° towards the proximal end of the perfusion catheter body to form a hook shape, and the distal end of the hose is bent and extended towards the inside of the formed hook shape to form a straight segment.

7. The coiled multi-ring perfusion catheter of claim 6, wherein, The hose is inclined by 140-160° to the distal end of the perfusion catheter body to form an inclined segment, and the hose of the hook shape is located at the distal end of the inclined segment.

8. The coiled multi-ring perfusion catheter of claim 1, wherein, The perfusion catheter body is made of pebax material (polyether amide elastomer material).

9. The coiled multi-ring perfusion catheter of claim 1, wherein, The length of the hose is 20-60 mm.

10. The coiled multi-ring perfusion catheter of claim 1, wherein, Multiple perfusion holes are arranged on the perfusion catheter body, and the multiple perfusion holes are distributed in a spiral shape.

Images