Novel multi-cavity drainage catheter

Abstract

The utility model discloses a novel multi-cavity drainage catheter, which relates to the field of medical instruments, and comprises a cavity groove section, which is provided with a multi-branch support structure and is used for forming a stable drainage gap and preventing deformation and blockage; the circular tube section is communicated with the cavity groove section and is used for guiding out the drainage liquid; the central tube cavity penetrates through the inner end of the cavity groove section and is communicated with the round tube section to form a flushing and dosing channel independent of the drainage channel, a double-channel structure is formed, and physical isolation of the drainage channel and the flushing / dosing channel is achieved. A uniform pressure relief structure is arranged on the surface of the central tube cavity, balanced pressure release is achieved, it is guaranteed that blockage can be effectively dredged in the low-pressure state, tissue damage caused by high pressure is prevented, and therefore the comfort level of a patient is improved, and the overall drainage effect is enhanced; the round tube section is provided with the punctuations, visual drawing distance indication is provided for clinical operation, accurate adjustment of the position of the catheter in the operation process is facilitated, displacement or positioning deviation caused by excessive drawing is avoided, and it is guaranteed that the drainage effect is stable and reliable.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, specifically to a novel multi-lumen drainage catheter. Background Technology

[0002] In clinical surgery, patients often experience postoperative complications such as infection and tissue adhesions due to the accumulation of exudate, including tissue fluid and blood, at the surgical site. Drainage catheters are crucial instruments for postoperative management, and their performance directly affects drainage effectiveness and patient recovery. Currently, most drainage catheters widely used in clinical practice are single-lumen groove structures, which have the following limitations in design and function:

[0003] 1. Structural defects lead to low drainage efficiency: Existing drainage catheters (such as grooved or spiral drainage tubes) often experience drainage interruptions due to deformation of the cavity / groove section or blockage at the junction, resulting in fluid retention and increasing the risk of postoperative infection. For example, patent number CN219614702U discloses a drainage tube composed of a double-lumen circular tube section and a spiral groove, but its spiral groove and the flushing inner cavity are not well matched, and uneven flushing pressure distribution is easily caused by structural size issues, affecting the drainage efficiency.

[0004] 2. Insufficient precision in flushing and drug administration: Existing catheters are mostly single drainage channels, failing to physically isolate drainage and flushing drug administration functions. When doctors attempt to flush or administer drugs through the drainage tube, the flushing fluid often mixes within the channel, preventing it from accurately targeting the distal lesion area, resulting in poor treatment outcomes. Patent number CN215460644U discloses a spiral drainage catheter, which improves drainage efficiency through its spiral drainage section, but its fixed length cannot adapt to the needs of different surgical sites, and it lacks an independent flushing channel design.

[0005] 3. Unstable pressure control: Although some multi-lumen drainage tubes attempt to combine drainage and flushing functions, complete physical isolation between the two channels is not achieved. Significant pressure fluctuations occur during flushing; low pressure is insufficient to effectively clear blockages, while high pressure can easily cause tissue damage or fluid extravasation. This problem is particularly prominent in complex anatomical locations (such as deep tissues).

[0006] 4. Insufficient adaptability and operability: Existing catheters lack imaging positioning marks or pull-out marks, which can easily lead to excessive displacement or positioning deviation during operation, further affecting the therapeutic effect. Utility Model Content

[0007] This invention addresses the aforementioned problems by providing a novel multi-lumen drainage catheter that enables efficient drainage and precise flushing for drug administration, while also stabilizing pressure through physical isolation of the dual channels and adapting to different clinical scenarios. This overcomes the shortcomings of existing technologies and improves the safety and effectiveness of postoperative management.

[0008] To address the above problems, this utility model provides a novel multi-lumen drainage catheter, comprising:

[0009] The cavity section has a multi-branch support structure to form a stable drainage gap and prevent deformation and blockage;

[0010] A circular tube section, connected to the cavity section, is used for the outflow of drainage fluid;

[0011] The central lumen extends through the inner end of the cavity section and is connected to the circular tube section, forming a flushing and drug delivery channel independent of the drainage channel. This creates a dual-channel structure within the cavity section, achieving physical isolation between flushing and drug delivery and drainage. Furthermore, the surface of the central lumen is provided with a uniform pressure relief structure to release flushing or drug delivery pressure and enhance the drainage effect.

[0012] The circular tube section is marked with markers to indicate the pulling distance and avoid excessive displacement.

[0013] Preferably, the multi-branch support structure is any one of cross-shaped, spiral cross-shaped, Y-shaped or spiral Y-shaped, and its branch ends form groove-shaped drainage channels.

[0014] Preferably, a developing line is provided between the cavity section and the circular tube section for precise positioning under image guidance.

[0015] Preferably, the cavity section is a hollow cylindrical structure with a central cavity located inside the cavity section. One end of the cavity section is surrounded by a multi-branch support structure, which forms multiple groove-shaped drainage channels at one end of the cavity section.

[0016] Preferably, the dual-channel structure includes a drainage channel and a flushing and drug delivery channel, wherein:

[0017] The drainage channel consists of a branch groove of the cavity section and an inner cavity of the circular tube section;

[0018] The flushing and drug delivery channel consists of a central lumen and a uniform pressure relief structure, and is connected via an external injection device.

[0019] Preferably, the multi-branched support structure of the cavity segment forms a rigid or semi-rigid support frame after unfolding in the body. The multi-branched support structure and the grooved drainage channel formed at its ends ensure a stable rigid or semi-rigid support frame after the cavity segment unfolds in the body, effectively supporting the drainage gap and preventing collapse of the drainage gap caused by catheter deformation or folding. The grooved drainage channel formed at the branch ends further optimizes the drainage path and improves the efficiency of fluid drainage. This significantly reduces the risk of complications caused by blockage, and is particularly suitable for draining high-viscosity fluids (such as pus or blood clots).

[0020] Preferably, the uniform pressure relief structure is a plurality of pore-like structures provided on the surface of the central lumen.

[0021] Preferably, the porous structure of the central lumen is uniformly distributed along the axial or circumferential direction, with a pore diameter of 0.5-1 mm, for uniform pressure release and enhanced drainage effect. Multiple small holes on the surface of the central lumen are uniformly distributed along the axial or circumferential direction, which can uniformly release pressure during flushing or drug administration, avoiding damage to tissues caused by local high pressure. At the same time, the small holes enhance the exudation effect of the drainage fluid and shorten the postoperative recovery time.

[0022] Preferably, the drainage catheter is made of a flexible biocompatible material, including medical-grade polyvinyl chloride or silicone. The use of flexible biocompatible materials such as medical-grade polyvinyl chloride or silicone reduces irritation to surrounding tissues. The length of the cavity segment can be cut and adjusted according to intraoperative needs to adapt to the drainage needs of different anatomical sites, solving the problem of placement difficulties caused by the fixed length of existing catheters.

[0023] Preferably, the surface of the multi-branch support structure of the cavity section is provided with a spiral groove to enhance the flow efficiency of the drainage fluid by utilizing the characteristics of the spiral flow channel. This is especially suitable for the rapid discharge of high-viscosity fluids (such as pus or blood clots), further improving the drainage efficiency.

[0024] Compared with the prior art, the present invention achieves the following beneficial technical effects:

[0025] This invention features an independent central lumen within the cavity section, forming a dual-channel structure that physically isolates the drainage channel from the irrigation / drug administration channel. Utilizing imaging-guided technologies such as ultrasound or X-ray localization, the irrigation fluid or medication can be accurately applied to the lesion area, effectively avoiding mixing and interference. This improves the precision of irrigation and drug administration while reducing potential damage to healthy tissue.

[0026] The uniform pressure relief structure on the surface of the central lumen of this invention can achieve balanced pressure release during flushing or drug administration, which not only ensures effective unblocking under low pressure, but also prevents tissue damage caused by high pressure, thereby improving patient comfort and enhancing the overall drainage effect.

[0027] The markings on the circular tube section of this utility model provide intuitive indications of the pulling distance for clinical operations, making it easier for doctors to accurately adjust the position of the catheter during surgery, effectively avoiding displacement or positioning deviation caused by excessive pulling, thereby ensuring stable and reliable drainage effect. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of a spiral Y-shaped drainage tube, which is an embodiment of the novel multi-lumen drainage catheter of this utility model.

[0029] Figure 2 This is a schematic diagram of the planar structure of a novel multi-lumen drainage catheter according to Embodiment 1 of this utility model.

[0030] Figure 3 This is a schematic diagram of the structure of the Y-type drainage tube, which is an embodiment of the novel multi-lumen drainage catheter of this utility model.

[0031] Figure 4 This is a schematic diagram of the planar structure of Embodiment 2 of the novel multi-lumen drainage catheter of this utility model.

[0032] Figure 5 This is a schematic diagram of the spiral cross-shaped drainage tube, which is an embodiment of the novel multi-lumen drainage catheter of this utility model.

[0033] Figure 6 This is a schematic diagram of the planar structure of Embodiment 3 of the novel multi-lumen drainage catheter of this utility model.

[0034] Figure 7 This is a schematic diagram of the structure of the cross-shaped drainage tube, which is an embodiment of the novel multi-lumen drainage catheter of this utility model.

[0035] Figure 8 This is a schematic diagram of the planar structure of Embodiment 4 of the novel multi-lumen drainage catheter of this utility model.

[0036] Figure 9 This is a structural schematic diagram from another perspective of Embodiment 4 of the novel multi-lumen drainage catheter of this utility model.

[0037] In the diagram: 1. Cavity section; 2. Circular tube section; 3. Central lumen; 4. Imaging line; 5. Marking point; 6. Uniform pressure relief structure. Detailed Implementation

[0038] The specific embodiments of the multi-lumen drainage catheter of this utility model will be described in detail below with reference to the accompanying drawings and examples. It should be noted that, for ease of explanation, the embodiments of this utility model are only used to illustrate the principle of this utility model and are not intended to limit the scope of protection of this utility model.

[0039] Example 1: Refer to Figure 1 and Figure 2 As shown, this embodiment provides a spiral Y-shaped drainage catheter, the structure of which includes a groove section 1, a circular tube section 2, a central lumen 3, a radiopaque line 4, a marker 5, and a uniform pressure relief structure 6 disposed on the surface of the central lumen.

[0040] The cavity section 1 adopts a hollow cylindrical structure with a spiral Y-shaped multi-branch support structure on its outer wall. The end of the support structure forms a groove-shaped drainage channel. When placed in the body, this structure can fully unfold to form a rigid or semi-rigid support frame, ensuring that the drainage gap does not collapse due to catheter bending or local deformation, thereby ensuring the patency of the drainage channel.

[0041] The circular tube segment 2 is connected to the cavity segment 1, and its interior forms the drainage channel. Markings 5 ​​are placed on its outer wall to indicate the pulling distance, helping doctors to accurately control the depth of the catheter during the operation and avoid excessive displacement.

[0042] The central lumen 3 penetrates the inner end of the cavity section 1 and connects to the circular tube section 2, forming a flushing and drug delivery channel that is physically isolated from the drainage channel. The surface of the central lumen is uniformly arranged with pore-shaped pressure-relieving structures 6 with a pore size of 0.5 to 1 mm, which can uniformly release pressure during flushing or drug delivery, ensuring effective unblocking under low pressure and preventing local high pressure from damaging tissues.

[0043] In clinical use, the catheter is precisely placed in the lesion area under image guidance (with the help of the imaging line 4 set between the lumen segment and the round tube segment).

[0044] When fluid accumulation or high-viscosity fluid (such as pus or blood clots) occurs, the branch support structure inside the cavity segment unfolds to form a stable drainage gap. Through the groove-shaped drainage channel, it forms a continuous drainage channel with the inner cavity of the circular tube segment 2, and quickly drains the fluid out of the body.

[0045] Meanwhile, through the connection of the external injection device to the central lumen 3, the doctor can inject flushing fluid or drugs into the flushing drug delivery channel. Due to the physical isolation between the two channels, the flushing fluid or drugs can be precisely applied to the target area. Furthermore, due to the uniform pressure relief structure on the surface of the central lumen, the pressure during flushing can be effectively dispersed, ensuring safe and balanced drug distribution.

[0046] The dual-channel structure achieves complete physical isolation between the drainage channel and the flushing and drug delivery channel, avoiding the problem of inaccurate treatment caused by liquid mixing during flushing in single-lumen structures. The porous pressure-relieving structure on the surface of the central lumen ensures that the injected liquid or drug is evenly distributed throughout the entire drug delivery channel, effectively preventing damage to tissues from local high pressure and improving the problems of large pressure fluctuations and easy tissue extravasation during traditional catheter flushing.

[0047] The multi-branched support structure of the cavity segment forms a stable support framework after unfolding inside the body, ensuring that the drainage gap is not squeezed and collapsed by external forces, thereby reducing the risk of complications caused by blockage. The markings on the circular tube segment provide doctors with intuitive indications of the withdrawal distance, allowing the catheter to be precisely adjusted according to the needs of the surgery during use, ensuring that the catheter is always in the optimal drainage position.

[0048] Example 2: Refer to Figure 3 and Figure 4 As shown, this embodiment provides a Y-shaped drainage catheter, whose main structure is similar to that of Embodiment 1, but the multi-branch support structure adopts a Y-shaped arrangement.

[0049] Cavity section 1: It has a central cavity 3 inside and a Y-shaped multi-branch support structure arranged around it. The groove-shaped drainage channel formed at its end is connected to the outer circular pipe section 2 through the cavity section.

[0050] Round tube section 2: It is also equipped with markings 5 ​​to indicate the distance of withdrawal, so as to ensure that the doctor can accurately grasp the position of the catheter during operation.

[0051] Central lumen 3 and uniform pressure relief structure 6: Small holes evenly distributed along the axial or circumferential direction constitute a pressure equalization system, which effectively disperses pressure during flushing or drug administration.

[0052] The Y-shaped structure allows the catheter to better adapt to the anatomical structure of different surgical sites during placement, ensuring the stability of the drainage and irrigation channels.

[0053] During the drainage of high-viscosity fluids, the combined effect of multiple support structures can quickly form a stable drainage gap, achieving efficient drainage and shortening postoperative recovery time.

[0054] Example 3: Refer to Figure 5 and Figure 6 As shown, this embodiment provides a spiral cross-shaped drainage catheter, whose structure is similar to the aforementioned embodiments, but a spiral cross-shaped arrangement is adopted on the multi-branch support structure of the cavity section to further optimize the fluid drainage effect. The spiral cross-shaped structure allows the drainage fluid to flow along the spiral channel within the cavity, forming a continuous spiral flow field, which helps to accelerate the drainage of high-viscosity fluids (such as pus or blood clots), reduce local flow velocity unevenness, and thus further improve drainage efficiency. After the spiral cross-shaped structure unfolds in the body, it can form a stable support frame and evenly distribute external pressure. The remaining technical solutions are the same as in Embodiment 1.

[0055] Example 4: Refer to Figure 7 , Figure 8 and Figure 9 As shown, this embodiment provides a cross-shaped drainage catheter. Its design focuses on employing a simple cross-shaped multi-branch support structure to achieve a stable drainage channel and efficient fluid drainage. The cross-shaped structure consists of four evenly distributed branches, making the design relatively simple, facilitating mass production and quality control, and reducing manufacturing costs. After unfolding within the body, the cross-shaped support structure forms uniform lateral support, effectively maintaining the cylindrical shape of the cavity section and the drainage gap, ensuring that all drainage channels remain open, and maintaining overall stability even if some support structures are damaged. The remaining technical solutions are the same as in Embodiment 1.

[0056] As can be seen from the detailed description of the above embodiments, the multi-lumen drainage catheter of this utility model adopts a dual-channel design, achieving physical isolation between the drainage channel and the flushing / drug administration channel. Through a uniform pressure relief structure, marking points, and a multi-branch support structure, it significantly improves the accuracy and safety of drainage, flushing, and drug administration. Whether in the drainage of high-viscosity liquids or in the precise positioning of complex anatomical sites, this utility model provides a stable and reliable solution, thereby improving upon the shortcomings of existing technologies and possessing high clinical application value.

[0057] Although the above embodiments have described the present invention in detail, those skilled in the art can make various modifications and variations to the above embodiments without departing from the spirit and protection scope of the present invention. All such modifications and variations should be understood to fall within the protection scope of the present invention.

[0058] In the description of this utility model, it should be noted that the terms "upper," "lower," 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. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" 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; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0059] It should be noted that in this invention, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0060] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features of the present invention.

Claims

1. A new multi-lumen drainage catheter, comprising: a lumen groove section (1) with a multi-branch support structure for forming a stable drainage gap and preventing deformation blockage; a round tube section (2) in communication with the lumen groove section for leading out the drainage liquid; characterized in that a central tube lumen (3) passing through the inner end of the lumen groove section (1) and in communication with the round tube section (2) forms a flushing and drug delivery channel independent of the drainage channel, so that the double-channel structure formed in the lumen groove section (1) realizes physical isolation of flushing and drug delivery from drainage, and the surface of the central tube lumen (3) is provided with a uniform pressure release structure (6) for releasing flushing or drug delivery pressure and enhancing drainage effect; The round tube section (2) is provided with a marker (5) for indicating the pulling distance to avoid excessive displacement.

2. The novel multi-lumen drainage catheter according to claim 1, wherein, The multi-branch support structure is any one of cross-shaped, spiral cross-shaped, Y-shaped or spiral Y-shaped, and the branch ends form a groove-shaped drainage channel.

3. The novel multi-lumen drainage catheter according to claim 1 or 2, characterized in that A developing line (4) is provided between the lumen groove section (1) and the round tube section (2) for precise positioning under image guidance.

4. The novel multi-lumen drainage catheter according to claim 2, wherein, The lumen groove section (1) is a hollow cylindrical structure, the central tube lumen (3) is arranged inside the lumen groove section (1), and a multi-branch support structure is arranged around the outer side of one end of the lumen groove section (1), so that the one end of the lumen groove section (1) forms a plurality of groove-shaped drainage channels.

5. The novel multi-lumen drainage catheter according to claim 1, wherein, The double-channel structure includes a drainage channel and a flushing and drug delivery channel, wherein: The drainage channel includes the branch grooves of the lumen groove section (1) and the inner cavity of the round tube section (2); The flushing and drug delivery channel includes the central tube lumen (3) and the uniform pressure release structure (6), and is connected through an external injection device.

6. The novel multi-lumen drainage catheter according to claim 1, wherein, The multi-branch support structure of the lumen groove section forms a rigid or semi-rigid support frame after unfolding in the body to prevent the drainage gap from collapsing.

7. The novel multi-lumen drainage catheter according to claim 1, wherein, The uniform pressure release structure (6) is a plurality of hole structures provided on the surface of the central tube lumen (3).

8. The novel multi-lumen drainage catheter according to claim 1, wherein, The hole structures of the central tube lumen (3) are uniformly distributed in the axial or circumferential direction, and the hole diameter is 0.5-1 mm for uniform pressure release and enhanced drainage effect.

9. The novel multi-lumen drainage catheter according to claim 1, wherein, The material of the drainage catheter is a flexible biocompatible material, including medical grade polyvinyl chloride or silicone.

10. The novel multi-lumen drainage catheter according to claim 1, wherein, The surface of the multi-branch support structure of the lumen groove section (1) is provided with a spiral groove for enhancing the drainage efficiency.

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