A double-cavity anti-blocking pus cavity drainage tube and flushing drainage system

Abstract

A double-cavity anti-blocking pus cavity drainage tube and flushing drainage system, the drainage tube comprises a catheter body, a distal end head and a proximal end interface, an axial drainage cavity and a liquid injection cavity are formed in the catheter body and isolated from each other, the drainage cavity is used for connecting a negative pressure drainage device to drain pus, the liquid injection cavity is used for connecting a syringe to flush or inject medicine, the catheter proximal end is respectively provided with a drainage end connector and a liquid injection end connector, the catheter distal end is provided with a flower-shaped head, the flower-shaped head end has a plurality of expanded wing structures, the catheter distal end is provided with a drainage opening hole communicating with the drainage cavity, and the liquid injection cavity is provided with a liquid injection hole opening near the distal end. In this way, it can be suitable for joint cavity infection, liver / kidney abscess and soft tissue abscess and other infectious lesions requiring flushing and drainage.

Description

Technical Field

[0001] This invention relates to medical devices, particularly to a medical suction or pumping system, and more specifically to a dual-lumen anti-blocking abscess drainage tube and a flushing drainage system. Background Technology

[0002] Infectious abscesses or infected cavity lesions, such as joint infections, liver abscesses, kidney abscesses, and soft tissue abscesses, often require continuous drainage during treatment, supplemented by irrigation, infusion of antibiotics, or retention of medication solutions to reduce local bacterial load, promote the clearance of residual pus in the cavity, and reduce infection recurrence. Taking joint infection after total hip arthroplasty as an example, a combined approach of continuous drainage, irrigation, and retention of high-concentration antibiotics in the joint cavity is often used clinically before and after revision surgery. The current common treatment method is "two in, two out," which involves inserting multiple single-channel catheters, such as two injection or irrigation catheters and two drainage catheters, to respectively complete fluid injection, irrigation, aspiration sampling, and continuous drainage.

[0003] However, this approach presents several problems: Most commonly used disposable surgical drainage tubes are designed for abdominal or general surgical drainage, and are made of relatively soft materials, making them prone to collapse under pressure or bending within the body. These tubes are not specifically designed for long-term irrigation and drainage of highly viscous pus, fibrin deposits, and necrotic tissue fragments; highly viscous pus, protein deposits, and fibrous tissue fragments easily adhere to the tube wall or block side openings, leading to obstructed drainage and increasing the risk of tube blockage, replacement, and recurrence of infection; to separate drug administration from drainage, multiple catheters are often required postoperatively, increasing the number of skin channels, the open area, and the complexity of nursing procedures, while also increasing patient discomfort and potential infection risks; single-channel catheters have a long exposed section, making it easy for medication to remain in the lumen and mix with aspirated samples, affecting the accuracy of white blood cell counts, bacterial cultures, and other test results; simultaneously, some medication remains in the lumen, reducing the effective amount of medication actually entering the joint cavity or abscess cavity, resulting in decreased drug utilization efficiency and waste.

[0004] Therefore, there is an urgent need for an integrated flushing and drainage catheter that can achieve independent injection and drainage lumens within a single catheter, is suitable for highly viscous pus, and reduces the risk of blockage. Summary of the Invention

[0005] To address the aforementioned problems, the present invention aims to provide a dual-lumen anti-blockage drainage tube and flushing drainage system that enables independent injection and drainage lumens on a single catheter, and features anti-blockage, easy management, and easy sampling.

[0006] According to one aspect of the present invention, a dual-lumen anti-blocking abscess drainage tube is provided, comprising: a catheter body, a distal head, and a proximal interface, wherein the catheter body has a drainage cavity and an injection cavity that are isolated from each other extending axially, the proximal interface includes a drainage end connector and an injection end connector respectively provided corresponding to the drainage cavity and the injection cavity, the distal head includes a tip portion, a plurality of elastic tube wall strips and longitudinal incisions alternately formed circumferentially extending axially along the catheter body, and a section that passes through the drainage cavity and the section to be fixed from the proximal interface. A tension line is fixed at the tip, and the distal ends of multiple tube wall strips are integrally connected to the proximal end of the distal head. The proximal ends of multiple tube wall strips are integrally connected to the catheter body. The distal end of the drainage cavity opens towards the inner space of the opening and closing section surrounded by multiple tube wall strips through a drainage opening. The distal end of the injection cavity is connected to the injection cavity opening on the side wall of the catheter body. When the tension line is pulled proximally, the tension line drives the tip to move proximally, causing the opening and closing section to be axially compressed and radially outward and bent from the closed state to the open state.

[0007] According to another aspect of the present invention, a flushing and drainage system is provided, comprising the above-described dual-lumen anti-blockage abscess drainage tube.

[0008] According to the present invention, the following beneficial effects are achieved: It enables stronger anti-clogging capability: the flower-shaped end expands fluid passage capacity, can be used with the anti-clogging mesh to intercept debris, is suitable for highly viscous pus, and reduces the rate of tube blockage and replacement. It can be used for infectious lesions requiring irrigation and drainage, such as joint infections, liver / kidney abscesses, and soft tissue abscesses. Attached Figure Description

[0009] To more clearly illustrate the technical solution of the present invention, the accompanying drawings required for the embodiments are briefly described below. The drawings are illustrative and do not constitute a limitation on the scope of protection.

[0010] Figure 1 A schematic diagram of the overall structure of the flower-shaped double-lumen anti-blockage abscess drainage tube according to an embodiment of the present invention is shown.

[0011] Figure 2 A schematic cross-sectional view of the double lumen of the catheter body is shown.

[0012] Figure 3 A schematic diagram showing the layout of the proximal controller and the connection between the drainage chamber and the injection chamber is provided.

[0013] Figure 4 A schematic diagram of the flower-shaped head end structure is shown.

[0014] Figure 5 A schematic diagram of the deformed structure at the end of the flower-shaped head is shown.

[0015] Figure 6 A schematic diagram of the structure of a modified example 2 of the flower-shaped head end is shown.

[0016] Figure 7 A schematic diagram of the additional actuator block in Modified Example 3 is shown.

[0017] Figure 8 A schematic diagram of the top part of the modified example 3 is shown.

[0018] Figure 9 A schematic diagram of the distal side of the catheter body is shown.

[0019] Figure 10 Showing with Figure 9 Structural diagrams of variations of Example 1 or Example 7 for structural comparison.

[0020] Figure 11 A partial structural schematic diagram of the tube wall strips in Modified Example 5 is shown.

[0021] Figure 12 A schematic diagram of the double-line structure of variation example three is shown.

[0022] Figure 13 A schematic diagram of the more-lined structure of Variation Example 3 is shown. Detailed Implementation

[0023] Exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The exemplary embodiments described below and illustrated in the drawings are intended to teach the principles of the invention, enabling those skilled in the art to implement and use the invention in various environments and for various applications. Therefore, the scope of protection of the present invention is defined by the appended claims, and the exemplary embodiments are not intended, and should not be considered, a limiting description of the scope of protection of the present invention. Furthermore, for ease of description, the dimensions of the various parts shown in the drawings are not necessarily drawn to actual scale. Orientational descriptions, such as proximal and distal sides relative to the medical operator, longitudinal or axial length corresponding to the body's longitudinal length, and orientations or positional relationships indicated by up, down, left, right, top, bottom, etc., are based on the orientations or positional relationships shown in the drawings and are only for the purpose of facilitating the description of the present invention and simplifying the description, and are not intended to 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 the present invention. Unless otherwise specifically stated, the order and numerical values ​​of the components and assembly steps set forth in the embodiments do not limit the scope of the present invention.

[0024] <Overall Composition>

[0025] like Figures 1-9 As shown, the flower-shaped double-lumen anti-blocking abscess drainage tube according to an embodiment of the present invention is generally configured as a longitudinally elongated catheter, including: a catheter body 1, a flower-shaped distal head 4, and a proximal interface provided with a controller 2 and a proximal connector 3.

[0026] In this embodiment, the catheter body 1 is preferably a one-piece molded eccentric double-lumen tube structure. For example... Figure 2 As shown, the catheter body 1 has a drainage cavity 11 and an injection cavity 12 separated from each other along its longitudinal direction. The drainage cavity 11 is the main cavity, located in the center or near the center of the catheter body 1, and extends along the catheter body 1 to the distal tip 4. The injection cavity 12 is located on one side of the drainage cavity 11 and is disposed near the outer peripheral wall of the catheter body 1. It extends along the axial direction of the catheter body 1 and is separated from the drainage cavity 11 by a partition wall 10. The drainage cavity 11 is used to connect to a negative pressure drainage device (not shown) via a proximal connector 3 to drain pus, necrotic tissue fragments, irrigation fluid, or medication. The injection cavity 12 is used to connect to a syringe or infusion set (not shown) via another proximal connector 3 to irrigate, inject medication, or infuse antibiotics into joint cavities, abscess cavities, or other infectious lesion cavities.

[0027] The drainage cavity 11 and the injection cavity 12 are arranged side-by-side within the catheter body 1 in a relatively fixed position. The area outside the drainage cavity 11 and the injection cavity 12 is the solid tube wall or support wall of the catheter body 1, which is used to maintain the overall strength, flexibility, bending resistance, and collapse resistance of the catheter body 1. The catheter body 1 can be made of medical silicone rubber, medical TPU, medical polyurethane, or other biocompatible elastic materials. Preferably, the catheter body 1 can be integrally formed by co-extrusion molding with a dual-cavity mold, injection molding, dip molding, or thermoplastic shaping after extrusion, so as to form mutually isolated drainage cavity 11 and injection cavity 12 within the same catheter body 1. Thus, the catheter body 1 has two independent cavities, wherein the drainage cavity 11 is used for negative pressure drainage, natural drainage, and accommodating the tension wire 42, and the injection cavity 12 is used for flushing, drug injection, or antibiotic infusion.

[0028] As an example, the cross-sectional area of ​​the drainage cavity 11 is larger than that of the injection cavity 12. The drainage cavity 11 constitutes the main fluid discharge channel, while the injection cavity 12 is configured as a side cavity independent of the drainage cavity 11. The injection cavity 12 is not directly connected to the drainage cavity 11, but terminates distally at one or more injection cavity openings 14 located on the side wall of the catheter body 1, and communicates with the lesion cavity only through these injection cavity openings 14. Figure 4 , 9 As shown. Thus, after the irrigation fluid or antibiotic enters the lesion cavity through the injection chamber 12 and the injection chamber opening 14, it is discharged through the drainage opening 15 and the drainage cavity 11, avoiding the injected fluid from directly short-circuiting into the drainage cavity 11 due to direct connection inside the catheter.

[0029] As the near-end connector 3 and controller 2, such as Figure 3As shown, a drainage end connector 31 and an injection end connector 32 are respectively provided at the proximal end of the catheter. The drainage end connector 31 and the injection end connector 32 are preferably standard Luer interfaces, and are respectively equipped with a drainage chamber controller 21 and an injection chamber controller 22 to achieve independent opening and closing control of the drainage chamber 11 and the injection chamber 12. The drainage end connector 31 can be connected to a negative pressure drainage ball, negative pressure drainage bottle, or drainage bag catheter via a detachable adapter; the injection end connector 32 can be connected to a syringe, infusion set, or flushing device. The drainage end and the injection end can each be equipped with a stop clamp, an opening and closing clamp, or a valve body as an opening and closing controller to facilitate drug injection, flushing, sampling, continuous drainage, and replacement of the downstream tubing. This proximal external interface structure reduces interference from residual fluid in the tubing, facilitates cleaning and maintenance, and reduces the complexity of nursing operations.

[0030] The flower-shaped distal head 4 is located on the distal side of the catheter body 1 and is formed in the distal wall region corresponding to the drainage cavity 11. The drainage cavity 11 forms a drainage opening 15 at the distal end of the catheter, which communicates with the inner space of the opening / closing section 41. The drainage opening 15 allows pus, necrotic tissue fragments, and irrigation fluid to enter the distal inlet of the drainage cavity 11 from the inner space of the opening / closing section 41, which is surrounded by multiple wall strips 45. The injection cavity 12 has one or more injection cavity openings 14 near the distal end. These injection cavity openings 14 are preferably in the form of side holes, used to deliver irrigation fluid or antibiotics into the joint cavity, abscess cavity, or other infectious lesion cavities. The injection cavity openings 14 can be located proximal to the distal head 4, near the mounting base 47 of the distal head 4, or in the catheter sidewall region avoiding the longitudinal incision 44. The distal end of the injection chamber 12 can be closed or terminated near the injection chamber opening 14, thereby ensuring that the injection chamber 12 is not directly connected to the drainage chamber 11 or the drainage opening 15. For example, the injection chamber 12 can extend like the drainage chamber 11 to the location of the drainage opening 15 but be closed at this location, while being laterally connected to the injection chamber opening 14 at a nearby location; or the injection chamber 12 can be configured to extend along with the drainage chamber 11 but terminate directly at the injection chamber opening 14.

[0031] The distal head 4 includes a tension line 42, a tip 43, a base section 46, a mounting base 47, and a flower-shaped opening and closing section 41 with alternating wall strips 45 and longitudinal incisions 44 along the circumferential direction. The flower-shaped opening and closing section 41 is formed by cutting the wall at the distal end of the catheter body 1 corresponding to the drainage cavity 11 in a manner such as longitudinal cutting or grooving to create a deployable multi-wing structure. Specifically, multiple longitudinal incisions 44 are formed along the catheter axis in the wall region at the distal end of the catheter body 1 corresponding to the drainage cavity 11. The longitudinal incisions 44 are arranged to avoid the region where the injection cavity 12 is located, and axially continuous wall portions are retained between circumferentially adjacent longitudinal incisions 44 as elastic wall strips 45. The longitudinal incisions 44 preferably avoid the side wall region where the injection cavity 12 is located or corresponding to it, so that the injection cavity 12 remains independently sealed at the distal end or communicates with the lesion cavity only through the injection cavity opening 14. There can be four, five, six or more longitudinal incisions 44; preferably, as in Figure 4 As shown in the embodiment, there are six longitudinal cuts 44, forming six deployable tube wall strips 45. Since the injection chamber 12 is attached to the side wall of the catheter body 1, the width, spacing, or length of the longitudinal cuts 44 and tube wall strips 45 near the injection chamber 12 can be adaptively adjusted according to the position of the injection chamber 12 to ensure that the opening and closing section 41 can be smoothly deployed and to avoid damaging the independence of the injection chamber 12.

[0032] The tension line 42 is disposed within the drainage cavity 11, or along the inner wall of the drainage cavity 11. The distal end of the tension line 42 is connected to, for example, a distal anchoring portion or a distal closure portion on the distal end head 4 near the distal end side (see...). Figure 4 The base section 46 and the top end of the top end 43 are included. The proximal end of the tension line 42 extends to the proximal end of the catheter and is connected to a pull ring, slider, control handle, or other tension control (not shown). The distal end of the tension line 42 can be connected to the top end 43 by knotting, crimping, heat fusion, medical adhesive bonding, embedding molding, or fixing after passing through the anchoring hole. The proximal control of the tension line 42 and the drainage cavity controller 21 can be staggered or set independently to avoid the tensioning operation of the tension line 42 affecting the opening and closing control of the drainage cavity 11.

[0033] During use, when the tension line 42 is pulled proximally, the tension line 42 causes the tip 43 to move proximally, resulting in axial compression of the opening segment 41. Due to the presence of multiple longitudinal incisions 44, the tube wall strips 45 between adjacent longitudinal incisions 44 undergo radial outward turning and bending under axial compression, thus bulging outward around the catheter axis to form a petal-shaped, umbrella-shaped, or nearly spherical cage-like anti-blockage structure. The unfolded tube wall strips 45 can form a supporting space within the lesion cavity, maintaining a certain fluid passage gap around the drainage opening 15 and preventing large necrotic tissue fragments, fibrous tissue, or clots from directly entering the drainage cavity 11. Instead, they enter the drainage cavity 11 sequentially through the longitudinal incisions 44 and the drainage opening 15, thereby reducing the risk of tube blockage. When the tension line 42 is released or released distally, the tube wall strips 45 retract elastically due to their own material, and the distal head 4 returns to a closed state, facilitating catheter insertion or removal.

[0034] The base segment 46 and the mounting base 47 are continuous annular tube wall segments, respectively, at the proximal and distal ends of the opening and closing segment 41, which are not cut by the longitudinal incision 44. The two ends of the tube wall strip 45 are continuously connected to the base segment 46 and the mounting base 47, respectively, thus forming a stable fixed end. For example, the base segment 46 can be formed by retaining the uncut area of ​​the distal tube wall of the conduit body 1 when cutting the longitudinal incision 44, or it can be formed through local thermoplastic shaping, reinforcing sleeve covering, or local thickening.

[0035] The tip 43 can be formed as a blunt end, a conical end, or a closed end to reduce tissue irritation during insertion. The drainage cavity 11 terminates at the distal end of the catheter and forms a drainage opening 15, through which the inner space of the opening section 41 communicates with the drainage cavity 11. The above design is a structural transformation of "forming a longitudinal incision 44 on the distal tube wall corresponding to the drainage cavity 11—tensioning line 42 pulling to generate axial compression—tube wall strips 45 radially outward turning into a cage". This structure can achieve retractable insertion, unfoldable anti-clogging, and intracavitary positioning without relying on an independent metal support. In one embodiment, multiple tube wall strips 45 themselves constitute a fence-like anti-clogging structure. In another embodiment, a flexible anti-clogging mesh can also be provided on the inner side of the opening section 41. The flexible anti-clogging mesh can be woven from nickel-titanium alloy wire, stainless steel wire, medical polymer wire, or other biocompatible materials, covering the inner side of the opening section 41 and supported by multiple tube wall strips 45. The flexible anti-blocking mesh is used to further intercept larger tissue fragments, while allowing pus, irrigation fluid and small particles to pass through and enter the drainage cavity 11.

[0036] Imaging markers 51, such as imaging lines or imaging rings, can be provided on the catheter body 1, distal tip 4, base segment 46, or proximal connector 3 for positioning under X-ray, fluoroscopy, CT, ultrasound, or other imaging methods. The imaging structure can be formed from a medical polymer or metal ring containing barium sulfate, tungsten powder, platinum-iridium alloy, tantalum, or other imaging materials. The imaging lines can be arranged along the axial direction of the catheter body 1, and the imaging rings can be located near the proximal end of the opening segment 41, the distal end of the opening segment 41, near the injection cavity opening 14, or near the drainage opening 15 to facilitate the determination of the distal catheter position, the unfolded area of ​​the distal tip 4, and the position of the injection cavity opening 14.

[0037] <Example of usage>

[0038] During catheter placement, the distal tip 4 can be positioned in a naturally contracted state as the catheter wall strip 45 elastically recovers, reducing the distal outer diameter of the catheter and facilitating percutaneous insertion into the joint cavity, abscess cavity, or other infectious lesion cavity via a puncture path. After the distal end of the catheter reaches the target position, the traction line 42 can be pulled proximally, causing the flower-shaped opening and closing segment 41 to unfold and form a petal-shaped or cage-like anti-blocking structure, thereby creating a larger drainage entrance area and anti-blocking support space within the lesion cavity.

[0039] After catheter placement, the drainage chamber controller 21 at the drainage end can be opened first, and a sample can be drawn back through the drainage end connector 31 and the drainage chamber 11 for white blood cell counting, bacterial culture, or other tests. Subsequently, the drainage chamber controller 21 can be operated to clamp the drainage end, and irrigation fluid, antibiotics, or other medications can be injected into the injection chamber 12 through the injection end connector 32, allowing the medication to enter the lesion cavity through the injection chamber opening 14 and be retained within the cavity. When continuous drainage is required, a negative pressure drainage device can be connected and the drainage chamber controller 21 opened, allowing pus, necrotic tissue fragments, irrigation fluid, or medications to enter the drainage chamber 11 through the drainage opening 15 and then drain. Depending on the condition, intermittent irrigation, continuous irrigation, medication retention, natural drainage, or negative pressure drainage can be performed.

[0040] <Variation Example 1>

[0041] The above shows the distal head 4, which is directly machined from the distal wall of the catheter body 1. Optionally, the distal head 4 can also be made separately. It is integrally connected to the distal end 43 on the distal side and has a mounting base 47 with a hollow channel on the proximal side. The mounting base 47 is then fitted into the catheter body 1, which has only a drainage opening 15 on the distal side and the distal end of the injection chamber 12 is sealed, to form an integral structure. The hollow channel of the mounting base 47 is integrally connected with the drainage opening 15 and essentially forms the drainage chamber 11.

[0042] Figure 5The image shows a protruding structure where the mounting base 47 is fitted from the outside onto the distal wall of the catheter body 1. Alternatively, a mounting base structure can be inserted from the inside into the distal wall of the catheter body 1, for ease of use. Figure 9 Comparison, such as Figure 10 The mounting recess 55, shown by the dotted line on the left side, can be seen by comparison to be essentially from... Figure 9 A sleeve-type socket extends from the left end face for inserting and fixing the mounting base 47 on the proximal side of the distal head 4.

[0043] <Variation Example 2>

[0044] As above Figure 4 The diagram shows a tension line 42 fixedly disposed along the outer surface of the top portion 43; however, it is not limited to this, and other types may also be provided. Figure 6 As shown, the distal end of the tension line 42 passes through the hollow tube disposed at the top end 43 and is then fixed to the end cap 48. The end cap 48 can be formed as an independent movable component, for example, having a conical or hemispherical outer peripheral surface for easy insertion into the body cavity, and may have a plug portion protruding from the proximal end face, allowing the end cap 48 to be at least partially fitted into the corresponding end hole 53 of the top end 43 with a clearance fit, thus enhancing stability. This not only facilitates installation, but also, during use, when the tension line 42 is pulled proximally, the tension line 42 drives the end cap 48, further pushing the top end 43 proximally. The proximal end face of the end cap 48 exerts a direct and uniform force through the top end 43, causing the opening-type opening segment 41 to be axially compressed, thereby facilitating opening deformation and reducing bias resistance. Furthermore, in applications prone to blockage, such as those involving highly viscous pus, fibrin deposits, and necrotic tissue fragments, the cap 48, being essentially a free end, allows the operator to manipulate the tension wire 42 from the proximal end, rotating it to a certain extent in one or both directions. This creates a stirring and harmonizing effect in the desired direction within the opening and closing section 41 without being restricted or obstructed by the cap 48. Since the cap 48 can be hollow and has a stepped outer surface, it is also suitable for use when a guidewire is inserted through the drainage cavity 11.

[0045] <Variation Example 3>

[0046] The above example illustrates a single tension line 42 passing through a drainage opening 15 located between the drainage cavity 11 and the inner space of the opening section 41. However, it is not limited to this. Additional tension lines or additional actuating blocks 48 may also be arranged in parallel or in series at predetermined intervals or arcs at predetermined sections of the tension line 42 passing through the drainage opening 15.

[0047] Thus, the multi-line structure set locally can enhance the stirring effect of the tension line 42 when entering and exiting the drainage opening 15, which can help resolve blockages that may be caused by highly viscous pus.

[0048] For example Figure 12 As shown, the tension line 42 splits into two strands at the connection point 420 adjacent to the drainage opening 15. In other words, the first strand 421 (corresponding to the tension line 42) and the second strand 422 (corresponding to the additional tension line) connect at the connection point 420, forming a fork 30 at the connection point 420. In particular, when the fork 30 exits the drainage opening 15 as the tension line 42 relaxes and retracts from the distal head 4, it can push out any fibrous tissue or clots 39 that may have been drawn in at this point, or it can break up the clots 39 and reduce their adhesion. The connection point 420 can also be integrally coated and fixed with a polymer after being joined, for example, by welding.

[0049] Here, the distal ends of the first line 421 and the second line 422 can also be connected to each other as follows: Figure 4 The tension wire 42 shown is used for distal fixation, or it can be positioned independently, especially symmetrically, at the top end 43.

[0050] Figure 13 Further illustrating a multi-line structure with additional strands (first line 423 to sixth line 428) corresponding to the additional tension line, which not only serves to Figure 12 The displacement and crushing agitation action also serves as a secondary filtration function. The tension line segment between the two connecting points is omitted here or can be omitted as needed.

[0051] The additional actuating block 48 can be fixed in a predetermined position by passing a tension wire 42 through an axial through hole 50 along the inner side of its block body. At this time, heat setting, bonding (medical-grade adhesives such as polyurethane / acrylate), mechanical fitting (such as injection molding or laser welding), or braiding / co-extrusion molding processes can be appropriately selected relative to the tension wire 42 as needed. Through the relative movement of the additional actuating block 48, it can act as a piston push, scrape, and break up agglomerates relative to the drainage opening 15 to promote suction flow. Preferably, the distal end and proximal end of the additional actuating block 48 are located in the hollow channel of the top portion 43 and extend into the drainage cavity 11 through the drainage opening 15 with a clearance fit, respectively. Preferably, the outer peripheral wall of the proximal end is configured to alternately bulge radially compared to the distal end, and is not limited to, for example... Figure 7 The stirring block 49 shown can also be a structure such as bristles, ribs, or spikes fixedly mounted on the tension line 42. The stirring block 49, which protrudes radially from the block body near the proximal end of the additional actuator block 48, is configured such that its overall outer diameter is less than or equal to the inner diameter of the drainage cavity 11. Preferably, as shown... Figure 8 As shown, multiple through holes 52 are provided near the hollow pipe at the top end 43. By controlling the movement amplitude and speed of the additional actuator block 48, a vibration stirring effect can also be achieved at the through holes 52. Preferably, development marks are also provided on the block body to facilitate the control of the movement amplitude of the additional actuator block 48.

[0052] <Variation Example 4>

[0053] The above example illustrates a longitudinal incision 44 extending parallel to the axial direction of the catheter body 1. However, it is not limited to this. The longitudinal incision 44 may also extend along the axial direction while being relatively inclined around the outer circumference of the catheter body 1. It is not limited to a straight line. It may also be a bent line with a tortuous or curved connection between the middle section and the two end sections. In this way, when the tension line 42 is pulled towards the proximal end during use, each bent line-shaped tube wall strip 45 forms a petal-shaped anti-blockage structure under axial compression. At the same time, it facilitates the cutting effect on highly viscous pus and the like with a certain degree of twisting, thereby resolving the blockage that may be caused by highly viscous pus and the like.

[0054] <Variation Example 5>

[0055] The above example illustrates a pipe wall strip 45 with equal width cutting; however, it is not limited to this example, and other variations are also possible. Figure 11 As shown, it is formed into a trapezoidal plate, for example, narrow on the distal side and wide on the proximal side. This is especially suitable for the case where a flower-shaped opening and closing segment 41 is formed with a conical hollow duct. Moreover, the different rigidity on the distal and proximal sides can promote petal-like expansion and contraction on the distal side.

[0056] <Variation Example Six>

[0057] In an alternative embodiment, the catheter body 1 can also adopt a structure in which two inner catheters are set inside an outer catheter, that is, a drainage inner catheter and an injection inner catheter are respectively set inside the outer catheter. The inner lumen of the drainage inner catheter forms a drainage cavity 11, and the inner lumen of the injection inner catheter forms an injection cavity 12. The drainage inner catheter and the injection inner catheter can be arranged side by side along the axial direction of the outer catheter and fixed inside the outer catheter by medical adhesive, heat fusion connection, heat shrink tubing fusion, local welding, positioning support, or filling support material, so that the two maintain a relatively fixed position inside the outer catheter. The gap between the outer catheter and the two inner catheters can be filled with medical elastic material to form a solid support, or a non-circulating support space can be formed by a local fixing structure.

[0058] <Variation Example 7>

[0059] Figure 10 The diagram also shows a method of avoiding the side wall area where the injection cavity 12 is located or corresponding to it. By forming the injection cavity opening 14 with the normal to the distal wall of the catheter body 1 facing the side opposite to the drainage opening 15 (i.e., the proximal side), the physical distance of the injected liquid to the longitudinal incision 44 can be advantageously increased, and the injected liquid is prevented from directly entering the drainage cavity 11 through the drainage opening 15.

[0060] Accordingly, according to the present invention, a flushing and drainage system is provided, which includes the above-described dual-lumen anti-blockage abscess drainage tube.

[0061] <Technical Effects>

[0062] By adopting the above technical solutions, the present invention has the following technical advantages compared with the prior art:

[0063] 1) Reduced number of catheters: Achieving dual functions of infusion and drainage on a single catheter reduces the number of skin channels, lowers the risk of infection, and alleviates patient discomfort. The catheter body 1 is preferably a one-piece molded dual-lumen structure, reducing the number of parts and assembly complexity, and facilitating clinical operations that allow for retractable insertion and deployment.

[0064] 2) Independent and non-interfering cavities: The injection cavity 12 and the drainage cavity 11 are isolated from each other. The injection cavity 12 injects fluid into the lesion cavity through the injection cavity opening 14 on the side wall, and the drainage cavity 11 is aspirated or drained through the drainage opening 15. This avoids the injection fluid from directly short-circuiting into the drainage cavity 11 inside the catheter, and supports clinical procedures such as "first aspirate and sample - then inject and retain the drug - then continue drainage".

[0065] 3) Strong anti-blocking ability: The distal head 4 is controlled to expand by the tension line 42, and multiple tube wall strips 45 form a petal-shaped or cage-shaped support structure within the lesion cavity. This can expand the drainage inlet area, maintain fluid passage space around the drainage opening 15, and prevent larger tissue fragments, fibrous tissue, or clots from directly entering the drainage cavity 11. If necessary, a flexible anti-blocking mesh can also be set on the inner side of the flower-shaped opening and closing section 41 to further enhance the anti-blocking effect and adapt to highly viscous pus and infectious lesions containing tissue fragments.

[0066] 4) Facilitates irrigation and drug coverage: The injection chamber 12 is attached to the side wall of the catheter body 1 and releases irrigation fluid or antibiotics into the lesion cavity through one or more injection chamber openings 14, so that the drug can enter the lesion cavity first and then be discharged through the drainage chamber 11, which helps to expand the local irrigation range and improve the drug utilization efficiency.

[0067] 5) Less residual fluid in the in vitro segment: The proximal drainage port and the injection port are independent of each other and can be connected to detachable rear-end tubing, negative pressure drainage ball, drainage bottle or drainage bag catheter, which facilitates rear-end replacement, cleaning and maintenance, reduces the interference of residual fluid in the in vitro segment on the sample and drug dosage, and improves sampling accuracy and drug utilization efficiency.

[0068] 6) Wide range of applications: This invention can be used for infectious lesions that require irrigation, drug injection and drainage, such as joint cavity infection, liver abscess, kidney abscess and soft tissue abscess that are not suitable for incision and drainage.

[0069] In the description of this application, "a plurality of" means two or more, unless otherwise expressly specified. Unless otherwise expressly specified and limited, the terms "installed," "connected," "linked," "fixed," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two elements or the interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. Although the invention has been described with reference to various specific embodiments, it should be understood that modifications can be made within the spirit and scope of the described inventive concept. Therefore, the invention is not limited to the described embodiments but has the full scope defined by the language of the appended claims.

Claims

1. A double lumen anti-blocked abscess lumen drainage tube, characterized in that, include: The catheter body (1), distal head (4), and proximal interface are provided. The catheter body (1) contains a drainage cavity (11) and an injection cavity (12) extending axially and isolated from each other. The proximal interface includes a drainage end connector (31) and an injection end connector (32) corresponding to the drainage cavity (11) and the injection cavity (12), respectively. The distal head (4) includes a tip (43), a circumferentially alternating section (41) with multiple elastic tube wall strips (45) extending axially along the catheter body (1) and longitudinal incisions (44), and a tension wire (4) that passes through the drainage cavity (11) from the proximal interface, through the circumferentially alternating section (41), and is fixed to the tip (43). 2) The distal ends of multiple tube wall strips (45) are integrally connected to the proximal end of the distal head (4), and the proximal ends of multiple tube wall strips (45) are integrally connected to the catheter body (1). The distal end of the drainage cavity (11) opens towards the inner space of the opening and closing section (41) surrounded by multiple tube wall strips (45) with a drainage opening (15). The distal end of the injection cavity (12) is connected to the injection cavity opening (14) which opens on the side wall of the catheter body (1). When the tension line (42) is pulled towards the proximal end, the tension line (42) drives the tip (43) to move towards the proximal end, so that the opening and closing section (41) is axially compressed and turns radially outward and bends from the closed state to the open state.

2. The dual lumen anti-blocked abscess drainage tube according to claim 1, wherein, The area within the catheter body (1) outside the drainage cavity (11) and the injection cavity (12) is the solid tube wall or support wall of the catheter body (1). The injection cavity (12) and the drainage cavity (11) are not directly connected to each other. Each tube wall strip (45) is formed integrally by longitudinally cutting the tube wall at the distal end of the catheter body (1).

3. The double-lumen anti-blockage drainage tube for abscesses according to claim 1, characterized in that, Multiple tube wall strips (45) are provided with a base segment (46) and an installation base (47) at the distal and proximal ends of the tube wall strips (43) connected to the top end and the tube body (1), respectively. The base segment (46) and the top end of the top end (43) constitute the distal anchoring part and the distal sealing part of the tension line (42).

4. The double-lumen anti-blockage drainage tube for abscesses according to claim 1, characterized in that, The top part (43) is provided with a hollow pipe, an end hole (53) that communicates with the inner space of the tensioning section (41) through the hollow pipe, and an end cap (48) that can be fitted into the end hole (53) in a clearance fit manner. The far end of the tension line (42) passes through the hollow pipe and is fixed to the end cap (48). Multiple through holes (52) are provided near the hollow pipe of the top part (43).

5. The double-lumen anti-blockage drainage tube for abscesses according to claim 1, characterized in that, The catheter body (1) is made of medical silicone rubber, medical TPU or medical polyurethane material, and the inner side of the opening and closing section (41) is provided with a flexible anti-blocking mesh surface formed by biocompatible material; a radiopaque mark is provided at the catheter body (1) or the distal head (4).

6. The double-lumen anti-blockage drainage tube for abscesses according to claim 1, characterized in that, The longitudinal incision (44) is configured to: cut the tube wall strip (45) in a manner of equal width, or form the tube wall strip (45) into a trapezoidal piece that is narrow on the distal side and wide on the proximal side, or extend around the outer periphery of the tube body (1) in a zigzag line shape while extending axially relative to the axial direction.

7. The double-lumen anti-blockage drainage tube for abscesses according to claim 1, characterized in that, The distal head (4) has a mounting base (47) with a hollow channel on the proximal side, and is installed on the distal side of the catheter body (1) with a drainage opening (15) by means of external embedding or internal insertion through the mounting base (47).

8. The double-lumen anti-blockage drainage tube for abscesses according to claim 1 or 4, characterized in that, At a predetermined section position of the tension line (42) through the drainage opening (15), an additional actuating block (48) is fixedly installed or an additional tension line is provided in a manner of at least one in parallel or multiple in series. The additional actuating block (48) includes an axial through hole (50) for the inner side of the block portion through which the tension line (42) passes, a block portion distal end of a hollow pipe arranged at the top end (43), and a block portion proximal end that extends into the drainage cavity (11) through the drainage opening (15) in a clearance fit manner. The outer peripheral wall of the block portion proximal end is configured to have a structure that alternately protrudes radially compared to the block portion distal end.

9. The double-lumen anti-blockage drainage tube for abscesses according to claim 1, characterized in that, The injection cavity opening (14) is formed on the side wall of the catheter body (1) with the normal to the distal wall of the catheter body (1) facing the opposite side to the drainage opening (15).

10. A flushing and drainage system, characterized in that, The double-lumen anti-blocking abscess drainage tube includes any one of claims 1 to 9.

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