Absorbent structure for a sinus stent

Abstract

The application provides a sinus intubation extracorporeal water absorption structure, and relates to the technical field of sinus intubation extracorporeal water absorption, which comprises a drainage tube, a sticking accessory, a negative pressure bag, a first one-way valve, a liquid storage bag and a second one-way valve. One end of the drainage tube is used for insertion into a sinus and for absorbing sinus exudate. The sticking accessory is connected with the drainage tube and is used for sticking to the skin of a patient, so as to detachably stick the drainage tube to the skin and block the sinus opening. The inlet end of the first one-way valve is connected with the end of the drainage tube away from the sinus, the outlet end of the first one-way valve is in communication with the inlet of the negative pressure bag, and the negative pressure bag is configured to automatically elastically recover and generate negative pressure on the drainage tube when it is released after being manually squeezed. The inlet end of the second one-way valve is in communication with the outlet of the negative pressure bag, and the outlet of the second one-way valve is detachably communicated with the liquid storage bag. The sinus intubation extracorporeal water absorption structure has the advantages of simple structure, low cost, self-management of the patient and no limitation on the activity of the patient.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sinus cannula in-vitro water absorption, in particular to a sinus cannula in-vitro water absorption structure. BACKGROUND

[0002] The sinus refers to a pathological blind tube with only one external opening leading to the body surface from deep tissue, which is often caused by postoperative infection, foreign body retention, and incomplete debridement after trauma. The key to sinus treatment lies in maintaining unobstructed drainage, eliminating dead space, and controlling infection. Currently, the conventional sinus treatment methods include gauze strip drainage and negative pressure sealing drainage.

[0003] Among them, for gauze strip drainage, the gauze strip is inserted into the sinus, and the exudate is absorbed by capillary action. However, this method has low water absorption efficiency, needs frequent replacement, causes great pain to the patient during replacement, and is prone to false healing. For negative pressure sealing drainage, although the drainage effect is good, it also has many problems, such as complex system, high cost, need for large negative pressure source, severe limitation of patient activity, and is not suitable for superficial and moderate exudation sinuses, and is not convenient to carry.

[0004] Therefore, there is an urgent need for a sinus drainage device with simple structure, low cost, self-management by the patient, no limitation on activity, and the ability to provide continuous and stable negative pressure. SUMMARY

[0005] In order to solve the problems in the related art, the present application provides a sinus cannula in-vitro water absorption structure.

[0006] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows:

[0007] The sinus cannula in-vitro water absorption structure comprises a drainage tube, an attachment, a negative pressure bag, a first one-way valve, a liquid storage bag, and a second one-way valve.

[0008] One end of the drainage tube is used for insertion into the sinus and for absorbing sinus exudate. The attachment is connected to the drainage tube and is used for attaching to the patient's skin to detachably attach the drainage tube to the skin and block the sinus opening.

[0009] The inlet end of the first one-way valve is connected to the end of the drainage tube away from the sinus, the outlet end of the first one-way valve is in communication with the inlet of the negative pressure bag, and the negative pressure bag is configured to automatically recover elastically and generate negative pressure on the drainage tube when it is released after being manually squeezed.

[0010] The inlet end of the second one-way valve is in communication with the outlet of the negative pressure bag, and the outlet of the second one-way valve is in detachable communication with the liquid storage bag.

[0011] Optionally, the drainage tube comprises a spherical part and a tubular part connected with each other, the spherical part is used for insertion into the sinus, a plurality of liquid inlet holes are respectively formed on the side of the spherical part close to the tubular part and the tubular wall of the tubular part close to the spherical part.

[0012] Optionally, the attachment comprises a base plate dressing and an adhesive strip, the base plate dressing is used for a stoma and is provided with the drainage tube, and the adhesive strip is used for attaching the base plate dressing to the skin of the patient; or,

[0013] The attachment is provided as a flexible suction cup, the flexible suction cup comprises a suction cup body, a through hole provided on the suction cup body and a blocking gauze provided in the suction cup body, the suction cup body is used for adsorption on the skin of the patient, the through hole is used for the drainage tube to pass through, and the blocking gauze is used for blocking the sinus opening.

[0014] Optionally, the negative pressure bag comprises a mounting cylinder, a bag body, two first elastic bodies, a first mounting block, a second mounting block, a third mounting block, a first locking rod, a blocking block and a second locking rod, one end of the mounting cylinder is sleeved outside the drainage tube, the other end is inwardly recessed to form a containing cavity for containing the bag body, the bag body comprises a top wall and a bottom wall arranged oppositely and an annular pleated edge wall connected between the top wall and the bottom wall, the top wall is provided with a first communication hole in communication with the drainage tube, the bottom wall is provided with a second communication hole in communication with the second one-way valve, the top wall, the pleated edge wall and the bottom wall are connected with the first mounting block, the second mounting block and the third mounting block respectively, and the two first elastic bodies are arranged between the first mounting block, the second mounting block and the third mounting block respectively.

[0015] One end of the first locking rod is rotatably mounted on the first mounting block, the second mounting block is formed with a first sliding groove for sliding mounting of the other end of the first locking rod, one end of the second locking rod is rotatably mounted on the third mounting block, the second mounting block is formed with a second sliding groove for sliding mounting of the other end of the second locking rod, and the blocking block is rotatably mounted in the second mounting block, and one end of the blocking block extends into the first sliding groove and the other end extends into the second sliding groove.

[0016] The negative pressure bag comprises a locking state and an unlocking state. In the locking state, the first elastic body is in a compressed state, the extension directions of the first locking rod and the second locking rod are crossed with a first direction respectively, the first locking rod is locked in the accommodating cavity, and the second locking rod abuts against the blocking block. In the unlocking state, the first locking rod is unlocked from the accommodating cavity, so that the first locking rod can slide along the first sliding groove and rotate to be in the same direction as the first direction, and the first locking rod is in contact with the blocking block and rotates the blocking block, so that the blocking block can release the abutting action on the second locking rod. The first direction is an axial direction of the bag body.

[0017] Optionally, the accommodating cavity comprises a first cavity and a second cavity in communication with each other, the first cavity is used for accommodating the bag body, and the second cavity is used for accommodating the first mounting block, the second mounting block and the third mounting block.

[0018] The outer wall of the mounting cylinder is inwardly recessed to form a locking cavity linked with the second cavity. In the locking state, the sliding end of the first locking rod is partially inserted into the locking cavity, so that the negative pressure bag is maintained in the locking state.

[0019] Optionally, the second cavity is provided in a plurality of forms, and the plurality of second cavities are arranged at intervals along the circumference of the accommodating cavity.

[0020] Optionally, the negative pressure bag further comprises an unlocking member mounted in the locking cavity. The unlocking member comprises an unlocking block and a second elastic body. One end of the second elastic body is connected with the mounting cylinder, and the other end of the second elastic body is connected with the unlocking block. At least part of the unlocking block protrudes out of the locking cavity.

[0021] The unlocking block is configured to be movable inwardly along the locking cavity to extrude the first locking rod out of the locking cavity, so that the negative pressure bag is switched from the locking state to the unlocking state.

[0022] Optionally, the second cavity is provided in a plurality of forms, and the plurality of second cavities are arranged at intervals along the circumference of the accommodating cavity.

[0023] The unlocking member is provided in a plurality of forms, and the plurality of unlocking members correspond to the plurality of second cavities one by one. The unlocking member further comprises an unlocking ring movably sleeved outside the mounting cylinder. The unlocking ring is configured to be movable along the outer wall of the mounting cylinder to simultaneously extrude all the unlocking blocks into the locking cavity, so that the negative pressure bag is switched from the locking state to the unlocking state.

[0024] Optionally, a hydrophobic bacteria filter for discharging air is arranged on the liquid storage bag.

[0025] Optionally, the liquid storage bag is also provided with a liquid level marking line.

[0026] Beneficial effects:

[0027] 1. Through the above technical solution, firstly, the external aspiration structure for sinus tract cannulation of the present invention includes only a few structures (e.g., drainage tube, adhesive attachments, negative pressure bag, etc.). Compared with existing negative pressure closed drainage systems (which require large negative pressure sources and complex pipelines), the solution of the present invention uses a mechanical negative pressure bag and a simple valve, requiring no electricity or external equipment, which can effectively reduce manufacturing costs and maintenance difficulty, making it very suitable for application scenarios such as primary healthcare, portable use, and home use.

[0028] Secondly, the negative pressure bag of this invention is designed to generate negative pressure by manual squeezing, which patients can master after a simple learning process and can operate independently without the assistance of professional medical personnel. At the same time, the entire device is lightweight and compact, without bulky external equipment, allowing patients to move freely while wearing it, without being restricted by bed rest or a fixed negative pressure source, effectively ensuring the patient's quality of life.

[0029] Third, the negative pressure bladder of this invention has automatic elastic recovery characteristics. After manual squeezing and release, it can generate negative pressure in the drainage tube. Combined with the flow direction control of the first and second one-way valves, it can effectively ensure unidirectional flow of exudate, avoid backflow, and maintain the continuity and stability of negative pressure. In this way, the problems of low drainage efficiency and easy formation of false healing by gauze strips can be effectively solved.

[0030] Fourth, the present invention utilizes negative pressure active suction, allowing sinus tract effusion to be efficiently drawn into the drainage tube and ultimately transferred to the reservoir bag, which is more efficient than passive drainage relying on capillary action using gauze strips. Simultaneously, the reservoir bag is detachable, facilitating emptying or replacement, effectively reducing the frequency of changes and lowering patient discomfort and infection risks.

[0031] Fifth, the adhesive attachment of the present invention can stably and reliably fix the drainage tube to the skin and block the sinus tract opening. It can not only effectively achieve a stable and reliable external water absorption structure for the entire sinus tract cannula, but also effectively avoid leakage and external contamination.

[0032] 2. Other beneficial effects or advantages of the present invention will be described in detail in the specific embodiments. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] in:

[0035] Figure 1 This is a three-dimensional structural diagram of an external water absorption structure for sinus tract cannulation provided in an exemplary embodiment of the present invention;

[0036] Figure 2 This is a partial cross-sectional view of the mounting cylinder provided in an exemplary embodiment of the present invention;

[0037] Figure 3 This is a three-dimensional structural diagram of the capsule body provided in an exemplary embodiment of the present invention;

[0038] Figure 4 This is a three-dimensional structural schematic diagram of the capsule body provided in an exemplary embodiment of the present invention from another perspective;

[0039] Figure 5 This is a schematic diagram of the structure of a negative pressure bladder provided in an exemplary embodiment of the present invention, wherein the negative pressure bladder is in a locked state;

[0040] Figure 6 yes Figure 5 Enlarged schematic diagram of the local structure at point A;

[0041] Figure 7 This is a schematic diagram of the structure of a negative pressure bladder provided in an exemplary embodiment of the present invention, wherein the negative pressure bladder is in the unlocking state;

[0042] Figure 8 yes Figure 7 Enlarged schematic diagram of the local structure at point B;

[0043] Figure 9 This is a schematic diagram of the assembly structure of a first elastomer, a first mounting block, a second mounting block, and a third mounting block provided in an exemplary embodiment of the present invention.

[0044] Explanation of the labels in the attached drawings:

[0045] 100 - External aspiration structure for sinus tract cannulation; 1 - Drainage tube; 11 - Ball-shaped part; 12 - Tubular part; 13 - Inlet port; 2 - Attachment; 21 - Suction cup body; 22 - Through hole; 3 - Negative pressure bag; 31 - Mounting cylinder; 311 - Receiving cavity; 3111 - First cavity; 3112 - Second cavity; 312 - Locking cavity; 32 - Bag body; 321 - Top wall; 3211 - First connecting hole; 322 - Bottom wall; 3221 - Second connecting hole; 323 - Ruffled edge 33-First elastomer; 341-First mounting block; 342-Second mounting block; 3421-First sliding groove; 3422-Second sliding groove; 343-Third mounting block; 351-First locking rod; 352-Second locking rod; 36-Blocking block; 37-Unlocking component; 371-Unlocking block; 372-Second elastomer; 373-Unlocking ring; 4-First one-way valve; 5-Liquid storage bag; 51-Hydrophobic bacterial filter; 52-Liquid level mark line; 6-Second one-way valve. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments.

[0047] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0048] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings.

[0049] like Figures 1 to 9 As shown, the present invention provides an external aspiration structure 100 for sinus tract cannulation, including a drainage tube 1, an adhesive attachment 2, a negative pressure bag 3, a first one-way valve 4, a reservoir bag 5, and a second one-way valve 6. One end of the drainage tube 1 is inserted into the sinus tract and used to absorb sinus tract exudate. The adhesive attachment 2 is connected to the drainage tube 1 and is used to attach to the patient's skin to detachably attach the drainage tube 1 to the skin and seal the sinus tract opening. The inlet end of the first one-way valve 4 is connected to the end of the drainage tube 1 away from the sinus tract, and the outlet end of the first one-way valve 4 is connected to the inlet of the negative pressure bag 3. The negative pressure bag 3 is configured to automatically elastically recover and generate negative pressure on the drainage tube 1 when released after being manually squeezed. The inlet end of the second one-way valve 6 is connected to the outlet of the negative pressure bag 3, and the outlet of the second one-way valve 6 is detachably connected to the reservoir bag 5.

[0050] Through the above technical solution, firstly, the sinus tract cannulation external water absorption structure 100 of the present invention includes only a few structures (e.g., drainage tube 1, attachment 2, negative pressure bag 3, etc.). Compared with existing negative pressure closed drainage systems (which require large negative pressure sources and complex pipelines), the solution of the present invention uses a mechanical negative pressure bag 3 and a simple valve, requiring no electricity or external equipment, which can effectively reduce manufacturing costs and maintenance difficulty, making it very suitable for application scenarios such as primary healthcare, portable use, and home use.

[0051] Secondly, the negative pressure bag 3 of this invention is designed to generate negative pressure by manual squeezing, which patients can master after a simple learning process and can operate independently without the assistance of professional medical personnel. At the same time, the entire device is lightweight and compact, without bulky external equipment, allowing patients to move more freely while wearing it, without being restricted by bed rest or a fixed negative pressure source, thus effectively ensuring the patient's quality of life.

[0052] Third, the negative pressure bladder 3 of this invention has automatic elastic recovery characteristics. After being manually squeezed and released, it can generate negative pressure in the drainage tube 1. Combined with the flow direction control of the first one-way valve 4 and the second one-way valve 6, it can effectively ensure unidirectional flow of exudate, avoid backflow, and maintain the continuity and stability of negative pressure. In this way, the problems of low drainage efficiency of gauze strips and the tendency to form false healing can be effectively solved.

[0053] Fourth, the present invention utilizes negative pressure active suction, allowing sinus tract effusion to be efficiently drawn into the drainage tube 1 and ultimately transferred to the reservoir bag 5, which is more efficient than passive drainage relying on capillary action using gauze strips. Simultaneously, the reservoir bag 5 is detachable, facilitating emptying or replacement, effectively reducing the frequency of replacement and lowering patient discomfort and infection risk.

[0054] Fifth, the attachment 2 of the present invention can stably and reliably fix the drainage tube 1 to the skin and block the sinus tract opening. It can not only effectively realize the stability and reliability of the entire sinus tract cannulation external water absorption structure 100, but also effectively avoid leakage and external contamination.

[0055] To facilitate understanding by those skilled in the art, the working process / principle of the present invention will be described below in conjunction with the accompanying drawings.

[0056] First, one end of the drainage tube 1 can be inserted into the target sinus tract. Then, the attachment 2 is applied to the patient's skin to fix the drainage tube 1 and seal the sinus tract opening, preventing air leakage or leakage of exudate. Then, the patient or operator can manually squeeze the negative pressure bag 3. During squeezing, the air inside the negative pressure bag 3 will be expelled (the reservoir bag 5 can be installed after the air is expelled, or it can be installed before the air is expelled; in this case, a corresponding venting and hydrophobic device, such as the hydrophobic bacterial filter 51 described below, needs to be installed on the reservoir bag 5). After release, the negative pressure bag 3 automatically returns to its original shape due to its elasticity, increasing its internal volume and generating negative pressure on the drainage tube 1. Under this negative pressure, the exudate in the sinus tract is drawn into the drainage tube 1. The first one-way valve 4 ensures that the exudate can only flow from the drainage tube 1 to the negative pressure bag 3, preventing backflow. During this process, the exudate will accumulate in the negative pressure bag 3. Once the negative pressure bladder 3 has fully returned to its original state, it can be manually squeezed again. The exudate inside will then flow through the second one-way valve 6 into the reservoir bag 5. By repeatedly squeezing and releasing the negative pressure bladder 3, negative pressure can be generated for an extended period, allowing exudate to continuously flow from the sinus tract through the drainage tube 1, the first one-way valve 4, the negative pressure bladder 3, and the second one-way valve 6 into the reservoir bag 5. The reservoir bag 5 is removable and can be directly replaced or emptied when full without affecting the drainage process.

[0057] In one embodiment of the present invention, such as Figure 1 As shown, the drainage tube 1 of the present invention may include a spherical portion 11 and a tubular portion 12 connected to each other. The spherical portion 11 is used to be inserted into the sinus tract. A plurality of inlet holes 13 are formed on the side of the spherical portion 11 near the tubular portion 12 and on the wall of the tubular portion 12 near the spherical portion 11.

[0058] In this embodiment, firstly, by arranging the spherical portion 11 in this way and inserting it deep into the sinus tract, the contact area with the sinus tract wall and exudate can be significantly increased. Compared to a single straight tube, the spherical structure and the tubular portion 12 connected to it are less likely to be completely enclosed or absorbed by the sinus tract wall, creating more space for exudate inflow. Simultaneously, distributing the inlet holes 13 in two areas—the root of the spherical portion 11 (the side closer to the tubular portion 12) and the wall of the adjacent tubular portion 12—creates a multi-regional and three-dimensional water inlet layout. This ensures that even if some holes on the spherical portion 11 deep within the sinus tract are temporarily blocked due to contact with tissue or a small amount of foreign matter, the holes on the tubular portion 12 closer to the sinus tract opening can still function normally and continuously absorb fluid. This effectively reduces the risk of a single hole blockage causing the entire drainage system to fail, ensuring the continuity and reliability of drainage.

[0059] Secondly, the smooth shape of the spherical portion 11 avoids sharp edges, effectively reducing scratches or pressure damage to fragile granulation tissue or newly formed epithelial tissue when inserted into the sinus tract. Simultaneously, multiple inlet holes 13 are distributed across the spherical portion 11 and the tubular portion 12, allowing negative pressure to be applied more evenly to different depths within the sinus tract, rather than being concentrated at a single point. This helps prevent pain, bleeding, or tissue damage (i.e., suction) that may occur with traditional single-hole drainage tubes 1 due to excessive local tissue adsorption or embedding within the hole, making negative pressure drainage gentler and safer.

[0060] Third, the spherical portion 11 acts as an anchor point, providing better anchoring than a straight tube of uniform thickness when placed within the sinus tract. This effectively prevents excessive displacement or slippage of the drainage tube 1 during use due to patient movement or accidental pulling, thus ensuring continuous and correct positioning of the drainage end and maintaining a stable drainage effect.

[0061] In one embodiment of the present invention, the attachment 2 of the present invention may include a base dressing and an adhesive strip. The base dressing is used for stoma and for the drainage tube 1 to pass through, and the adhesive strip is used to attach the base dressing to the patient's skin.

[0062] In this way, the base dressing (e.g., stoma base plate, hydrocolloid dressing, microporous dressing, etc.) and adhesive strip are designed to ensure a strong and sealed connection between the accessory 2 and the skin. This effectively prevents negative pressure leakage, ensuring that the negative pressure generated by the negative pressure bag 3 can act efficiently inside the sinus tract, while preventing sinus tract exudate from spilling out and contaminating the surrounding skin or clothing.

[0063] Meanwhile, the base dressing can be made of hypoallergenic, breathable medical materials, which can reduce skin irritation caused by long-term adhesion and prevent contact dermatitis. This provides a more comfortable experience for patients requiring long-term drainage.

[0064] In one embodiment of the present invention, such as Figure 1 As shown, the attachment 2 of the present invention can be configured as a flexible suction cup. The flexible suction cup includes a suction cup body 21, a through hole 22 opened on the suction cup body 21, and a sealing gauze (not shown) disposed in the suction cup body 21. The suction cup body 21 is used to adhere to the patient's skin, the through hole 22 is used for the drainage tube 1 to pass through, and the sealing gauze is used to seal the sinus tract opening.

[0065] In this way, fixation is achieved by the suction cup body 21 adhering to the patient's skin, completely avoiding the use of adhesives. This is effectively suitable for patients allergic to medical tapes or dressing adhesives, patients with poor skin conditions (such as maceration or damage), or areas with abundant hair that are difficult to adhere to. Simultaneously, the suction effect of the suction cup body 21 itself creates a localized negative pressure zone between the suction cup and the skin. This negative pressure not only serves to fix the device but also provides a slight, beneficial compression and stabilizing effect on the tissue surrounding the sinus tract opening. Furthermore, the built-in sealing gauze further ensures effective sealing of the sinus tract opening and works in conjunction with the suction force of the suction cup to maintain the integrity of the seal.

[0066] In one embodiment of the present invention, such as Figures 1 to 9 As shown, the negative pressure bag 3 of the present invention may include an installation cylinder 31, a bag body 32, two first elastic bodies 33, a first mounting block 341, a second mounting block 342, a third mounting block 343, a first locking rod 351, a blocking block 36, and a second locking rod 352. One end of the installation cylinder 31 is sleeved outside the drainage tube 1, and the other end is recessed inward to form a receiving cavity 311 for accommodating the bag body 32. The bag body 32 includes a top wall 321 and a bottom wall 322 disposed opposite to each other, and an annular pleated side wall 323 surrounding and connecting the top wall 321 and the bottom wall 322. The top wall 321 has a first communicating hole 3211 communicating with the drainage tube 1, and the bottom wall 322 has a second communicating hole 3221 communicating with the second one-way valve 6. The top wall 321, the pleated side wall 323, and the bottom wall 322 are respectively connected to the first mounting cylinder 311, the drainage tube 1, the second elastic body 321, the second elastic body 322, and the third one-way valve 6. Mounting block 341, second mounting block 342, and third mounting block 343 are connected. Two first elastic bodies 33 are respectively disposed between the first mounting block 341, second mounting block 342, and third mounting block 343. One end of the first locking rod 351 is rotatably mounted on the first mounting block 341. A first sliding groove 3421 is formed on the second mounting block 342 for the other end of the first locking rod 351 to be slidably mounted. One end of the second locking rod 352 is rotatably mounted on the third mounting block 343. A second sliding groove 3422 is formed on the second mounting block 342 for the other end of the second locking rod 352 to be slidably mounted. A blocking block 36 is rotatably mounted in the second mounting block 342, with one end of the blocking block 36 extending into the first sliding groove 3421 and the other end extending into the second sliding groove 3422.

[0067] The negative pressure bag 3 includes a locked state and an unlocked state. In the locked state, the first elastic body 33 is in a compressed state, the extension directions of the first locking rod 351 and the second locking rod 352 are respectively intersecting the first direction, and the first locking rod 351 is locked in the receiving cavity 311, while the second locking rod 352 abuts against the blocking block 36. In the unlocked state, the first locking rod 351 is unlocked in the receiving cavity 311, allowing the first locking rod 351 to slide along the first sliding groove 3421 and rotate to the same direction as the first direction, and to contact the blocking block 36, causing the blocking block 36 to rotate, so that the blocking block 36 can release its abutting action against the second locking rod 352. The first direction is the axial direction of the bag body 32.

[0068] Through the above technical solution, firstly, this technical solution can achieve negative pressure release control. Specifically, in the locked state, the first elastic body 33 is compressed, but through the mutual abutment of the first locking rod 351 and the second locking rod 352 with the blocking block 36, the entire bladder body 32 is forcibly kept in the compressed state. This means that the user can apply a large squeezing force to the negative pressure bladder 3 and lock it, thereby releasing the negative pressure at any time when drainage is needed. When drainage is needed, through the unlocking operation, the bladder body 32 will begin to expand under the action of the first elastic body 33 and continuously generate negative pressure.

[0069] Secondly, the negative pressure generation process is designed as a two-stage, linked process. In the first stage of negative pressure generation, simply operating the first locking lever 351 to unlock it will cause it to move along the first sliding groove 3421 and rotate as a whole under the action of the first elastic body 33. When it rotates to its maximum position (i.e., the first locking lever 351 is flush with the first direction), it will automatically trigger the blocking block 36 to rotate, thereby releasing the restriction on the second locking lever 352, and thus causing the second stage of negative pressure generation to occur. In this way, the negative pressure generation process of the entire capsule body 32 can be divided into two continuous stages. This not only avoids generating excessive negative pressure (avoiding excessive suction, stimulation, or pain) and improves the safety and comfort of the drainage process, but also effectively prolongs the duration of the negative pressure effect (stretching out the overall volume recovery process of the capsule body 32, thereby allowing the negative pressure generated to be sustained stably and reliably for a longer period of time, providing more sufficient time for the aspiration of the sinus tract exudate. This significantly improves the effective drainage efficiency of a single operation and overcomes the problem of excessively rapid negative pressure decay in the simple negative pressure capsule 3).

[0070] Third, by setting up a first mounting block 341, a second mounting block 342, and a third mounting block 343, and placing the first elastic body 33 between them, the top wall 321, the pleated sidewalls 323, and the bottom wall 322 of the bladder body 32 are connected to these mounting blocks respectively. The force transmission path is very clear and efficient. The compressive force is directly transmitted to the first elastic body 33 for storage through the corresponding mounting blocks; during rebound, the force of the first elastic body 33 is directly applied to various parts of the bladder body through the mounting blocks, ensuring its uniform and smooth expansion. This design integrates complex moving parts into a compact mounting cylinder 31, effectively achieving a compact mechanical structure.

[0071] In this embodiment, it should be noted that when the compression bladder body 32 is needed, the negative pressure bladder 3 can be inverted so that the blocking block 36 can avoid the movement path of the second locking rod 352 (e.g., Figure 7 and Figure 8 As shown), by compressing the bladder body 32, the first mounting block 341, the second mounting block 342, and the third mounting block 343 can approach each other, and the corresponding first locking lever 351 and second locking lever 352 can smoothly rotate to the locked state (as shown). Figure 5 and Figure 6 (As shown), and then after reaching the locked state, the negative pressure bag 3 can be placed upright.

[0072] Furthermore, it is understood that additional fixing structures (e.g., adhesive strips) can be used to temporarily fix the negative pressure bag 3 and the reservoir bag 5 to the patient's skin, so that the sinus tract cannulation external water absorption structure 100 of the present invention can reliably perform its drainage function and improve the drainage effect.

[0073] In one embodiment of the present invention, such as Figure 2 , Figure 5 and Figure 6 As shown, the receiving cavity 311 of the present invention may include a first cavity 3111 and a second cavity 3112 that are interconnected. The first cavity 3111 is used to receive the bladder body 32, and the second cavity 3112 is used to receive the first mounting block 341, the second mounting block 342 and the third mounting block 343. The outer wall of the mounting cylinder 31 is recessed inward to form a locking cavity 312 that is linked with the second cavity 3112. In the locked state, the sliding end of the first locking rod 351 extends into the locking cavity 312 so that the negative pressure bladder 3 is maintained in the locked state.

[0074] Thus, firstly, the first cavity 3111 serves to house and protect the bladder body 32, providing it with a dedicated, undisturbed space for expansion and contraction, ensuring the reliability of the core function of generating negative pressure. Simultaneously, the second cavity 3112 serves as a mechanical movement space, housing the core moving components of the locking / unlocking mechanism, such as the first mounting block 341, the second mounting block 342, and the third mounting block 343, and providing them with certain limiting and guiding effects. This isolation design effectively ensures that the bladder body 32 can deform smoothly and that the locking / unlocking mechanism can lock and unlock smoothly.

[0075] Secondly, a recessed locking cavity 312 is specially provided on the outer wall of the mounting cylinder 31, and it is linked with the second cavity 3112. This provides a clear and stable "slot" or "anchor point" for the sliding end of the first locking rod 351 in the locked state. In this way, the stability and anti-interference ability of the locked state can be effectively enhanced, preventing accidental unlocking due to equipment vibration or accidental contact, and ensuring that the pre-stored negative pressure can be maintained safely and reliably.

[0076] Third, the structural design of the locking cavity 312 allows the user to feel a clear "click" or change in resistance when operating the first locking lever 351 to enter the locked position, i.e., the tactile feedback of the sliding end of the first locking lever 351 sliding into the locking cavity 312. This clearly indicates to the operator that the device has successfully entered the locked state, improving the intuitiveness and accuracy of operation.

[0077] In one embodiment of the present invention, such as Figure 2 As shown, the second cavity 3112 of the present invention can be configured as a plurality of second cavities 3112, which are spaced apart along the circumferential direction of the receiving cavity 311.

[0078] Thus, firstly, by arranging several second cavities 3112 at circumferential intervals, the locking mechanism linked to them (including the first mounting block 341, the second mounting block 342, the third mounting block 343, the first locking rod 351, the second locking rod 352, etc.) also forms multiple symmetrical locking points around the bladder body 32. When the negative pressure bladder 3 is compressed and locked, the stored elastic force is evenly distributed to these circumferentially distributed locking points. In this way, stress concentration that may occur in a single-point locking structure can be effectively avoided, preventing component fatigue, deformation, or accidental unlocking caused by long-term unilateral force, and ensuring high stability of the locked state.

[0079] Second, single-point locking may cause the bladder body 32 to undergo non-axial, eccentric movement during rebound, thus affecting the uniformity and efficiency of the negative pressure effect. The circumferential multi-point locking design acts as a guide track for the movement of the bladder body 32, forcing it to expand and contract smoothly along a predetermined axis (i.e., the first direction). This ensures that the negative pressure can be concentrated and efficiently applied to the drainage tube 1, improving the reliability and consistency of the drainage effect.

[0080] In one embodiment of the present invention, such as Figure 6 and Figure 8 As shown, the negative pressure bladder 3 of the present invention may further include an unlocking member 37 installed in the locking cavity 312. The unlocking member 37 includes an unlocking block 371 and a second elastic body 372. One end of the second elastic body 372 is connected to the mounting cylinder 31, and the other end of the second elastic body 372 is connected to the unlocking block 371. At least a portion of the unlocking block 371 protrudes from the locking cavity 312. The unlocking block 371 is configured to move inward along the locking cavity 312 to squeeze the first locking rod 351 out of the locking cavity 312, so that the negative pressure bladder 3 switches from the locked state to the unlocked state.

[0081] First, the unlocking block 371 protrudes from the locking cavity 312, providing the user with a clear and definite physical operating point. The user does not need to search for or directly manipulate the potentially small or hard-to-reach first locking lever 351 itself; they can simply press the protruding unlocking block 371. This effectively simplifies the unlocking operation, making it intuitive and convenient, especially suitable for scenarios where patients may operate the device themselves, thus improving the device's usability and user experience.

[0082] Second, by pressing the unlocking block 371, its inward movement forces the first locking lever 351 out of the locking cavity 312. This design is an indirect, transmission-based unlocking method. It avoids direct, potentially improperly angled manipulation of the locking lever, preventing component deformation or damage due to improper operation. The unlocking process is guided by a dedicated component, making it smoother and more reliable, and protecting the integrity of the internal precision locking mechanism.

[0083] Third, the presence of the second elastic body 372 ensures that once the user releases the pressed unlocking block 371, the unlocking member 37 automatically returns to its initial position (i.e., the partially protruding unlocking block 371) under the action of elasticity. This means that after each unlocking operation, the unlocking device immediately resets, preparing for the next lock-unlock cycle. This ensures the continuity and rapid reusability of the device's functions, eliminating the need for manual reset of the unlocking mechanism.

[0084] Fourth, the unlock block 371 requires active inward pressing to trigger unlocking, which is significantly different from accidental scratches or touches that may occur in daily life (usually horizontal). Therefore, this design not only provides convenient active unlocking but also reduces the risk of the device accidentally being released from its locked state due to accidental contact, enhancing safety during use.

[0085] In one embodiment of the present invention, such as Figure 2 , Figure 6 and Figure 8 As shown, the second cavity 3112 of the present invention can be configured as a plurality of second cavities 3112, which are arranged at circumferential intervals along the receiving cavity 311; the unlocking member 37 is configured as a plurality of unlocking members 37, which are arranged one-to-one with the plurality of second cavities 3112. The unlocking member 37 also includes an unlocking ring 373, which is movably sleeved on the outside of the mounting cylinder 31. The unlocking ring 373 is configured to slide along the outer wall of the mounting cylinder 31 to simultaneously press all unlocking blocks 371 into the locking cavity 312, so as to switch the negative pressure bladder 3 from the locked state to the unlocked state.

[0086] In this way, firstly, through a sliding unlocking ring 373, the user only needs to perform a single, simple linear sliding action (such as pushing or sliding the unlocking ring 373) to simultaneously apply pressure to all circumferentially distributed unlocking blocks 371. This ensures that several locking points are unlocked instantaneously and synchronously. It completely eliminates the tedious and inconvenient operation of the user having to press each unlocking block 371 one by one, possibly in a sequential manner. Especially for patients with limited hand mobility, this design greatly improves operability and convenience. At the same time, synchronous unlocking ensures that the capsule body 32 can instantly and uniformly rebound along the axial direction, avoiding the possibility of partial mechanism jamming or capsule body tilting caused by asynchronous unlocking.

[0087] Secondly, a single unlocking block 371 may require a precise pressing point and a certain amount of force. The unlocking ring 373, through its ring-shaped structure, distributes the operating force and transmits it simultaneously to all unlocking blocks 371, making the unlocking action less strenuous and more forgiving. Even if the user's pushing force is slightly tilted, the unlocking ring 373 ensures that all unlocking blocks 371 receive sufficient and generally consistent driving force, thus reliably completing the unlocking function and reducing the probability of unlocking failure due to improper operation.

[0088] In this embodiment, it should be noted that, to prevent the unlocking ring 373 from falling off, a corresponding limiting structure can be provided on the outer peripheral wall of the mounting cylinder 31, for example, such as... Figure 1 and Figure 2 The structure shown.

[0089] In one embodiment of the present invention, such asFigure 1 As shown, the liquid storage bag 5 of the present invention may be provided with a hydrophobic bacterial filter 51 for air discharge.

[0090] Thus, firstly, during the drainage process, as exudate continuously enters the reservoir bag 5, the air inside the bag needs to be expelled to make room for the liquid. The hydrophobic bacterial filter 51 provides a one-way, controlled outlet for the air inside the bag. It allows air to escape freely, thereby ensuring that the reservoir bag 5 does not affect the continuity of drainage due to positive pressure accumulation, maintaining the long-term effectiveness of the entire drainage system.

[0091] Secondly, the hydrophobic bacterial filter 51, as a medical-grade filter membrane, has extremely small pores that effectively block microorganisms from passing through. Simultaneously, its hydrophobic properties ensure that liquids (including exudate and moisture from the air) will not clog the membrane pores. Therefore, this design establishes a reliable biosafety barrier while ensuring smooth airflow, preventing collected exudate from becoming a breeding ground for bacteria and causing contaminants to back-contaminate the drainage system or even sinus tract wounds, significantly reducing the risk of secondary infection.

[0092] In one embodiment of the present invention, such as Figure 1 As shown, the liquid storage bag 5 of the present invention may also be provided with a liquid level marking line 52.

[0093] In this way, firstly, the liquid level marker 52 provides a visual ruler for patients or medical staff, allowing them to easily and accurately read the amount of exudate collected in the reservoir bag 5. Simultaneously, it enables them to assess drainage and wound healing based on liquid level changes, and to promptly replace or empty the reservoir bag 5 when it is nearly full. This avoids the risk of overfilling due to inaccurate liquid level assessment, which could lead to leakage or backflow contamination.

[0094] Secondly, patients or medical staff can roughly quantify the drainage volume by observing and recording the position of the marker line reached by the exudate within a unit of time. This serves as a positive auxiliary tool for monitoring the progression of the condition (such as whether the exudate is gradually decreasing) and for providing feedback to the doctor.

[0095] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A sinus tract cannulation external water absorption structure, characterized in that, Includes a drainage tube (1), an accessory (2), a negative pressure bladder (3), a first check valve (4), a reservoir bag (5), and a second check valve (6); One end of the drainage tube (1) is used to be inserted into the sinus tract and to absorb the sinus tract exudate. The patch (2) is connected to the drainage tube (1) and is used to be attached to the patient's skin to detachably attach the drainage tube (1) to the skin and block the sinus tract opening. The inlet end of the first one-way valve (4) is connected to the end of the drainage tube (1) away from the sinus tract, and the outlet end of the first one-way valve (4) is connected to the inlet of the negative pressure bladder (3). The negative pressure bladder (3) is configured to automatically and elastically recover and generate negative pressure on the drainage tube (1) when it is released after being manually squeezed. The inlet of the second one-way valve (6) is connected to the outlet of the negative pressure bladder (3), and the outlet of the second one-way valve (6) is detachably connected to the liquid storage bag (5). The drainage tube (1) includes a spherical part (11) and a tubular part (12) connected to each other. The spherical part (11) is used to be inserted into the sinus tract. A plurality of inlet holes (13) are formed on the side of the spherical part (11) near the tubular part (12) and on the wall of the tubular part (12) near the spherical part (11). The negative pressure bag (3) includes an installation cylinder (31), a bag body (32), a first elastic body (33), a first installation block (341), a second installation block (342), a third installation block (343), a first locking rod (351), a blocking block (36), and a second locking rod (352). One end of the installation cylinder (31) is sleeved outside the drainage tube (1), and the other end is recessed inward to form a receiving cavity (311) for accommodating the bag body (32). The bag body (32) includes a top wall (321) and a bottom wall (322) arranged opposite to each other, and an annular pleated sidewall that surrounds and connects the top wall (321) and the bottom wall (322). (323), the top wall (321) is provided with a first connecting hole (3211) communicating with the drainage pipe (1), and the bottom wall (322) is provided with a second connecting hole (3221) communicating with the second one-way valve (6). The top wall (321), the pleated side wall (323) and the bottom wall (322) are respectively connected to the first mounting block (341), the second mounting block (342) and the third mounting block (343). A first elastic body (33) is provided between the first mounting block (341) and the second mounting block (342). A first elastic body (33) is provided between the second mounting block (342) and the third mounting block (343). One end of the first locking rod (351) is rotatably mounted on the first mounting block (341). The second mounting block (342) has a first sliding groove (3421) for the other end of the first locking rod (351) to be slidably mounted. One end of the second locking rod (352) is rotatably mounted on the third mounting block (343). The second mounting block (342) has a second sliding groove (3422) for the other end of the second locking rod (352) to be slidably mounted. The blocking block (36) is rotatably mounted in the second mounting block (342), with one end of the blocking block (36) extending into the first sliding groove (3421) and the other end extending into the second sliding groove (3422). The negative pressure bladder (3) includes a locked state and an unlocked state. In the locked state, the first elastic body (33) is in a compressed state, the extension directions of the first locking rod (351) and the second locking rod (352) intersect with the first direction, and the first locking rod (351) is locked in the receiving cavity (311), and the second locking rod (352) abuts against the blocking block (36). In the unlocked state, the first locking rod (351) is unlocked in the receiving cavity (311), so that the first locking rod (351) can slide along the first sliding groove (3421) and rotate to the same direction as the first direction, and contact the blocking block (36) and make the blocking block (36) rotate, so that the blocking block (36) can release the abutting action against the second locking rod (352). The first direction is the axial direction of the bladder body (32).

2. The external water absorption structure for sinus tract cannulation according to claim 1, characterized in that, The attachment (2) includes a base dressing and an adhesive strip. The base dressing is used for ostomy and for the drainage tube (1) to be inserted. The adhesive strip is used to attach the base dressing to the patient's skin; or, The attachment (2) is configured as a flexible suction cup, which includes a suction cup body (21), a through hole (22) opened on the suction cup body (21), and a sealing gauze set inside the suction cup body (21). The suction cup body (21) is used to adhere to the patient's skin, the through hole (22) is used for the drainage tube (1) to pass through, and the sealing gauze is used to seal the sinus tract opening.

3. The external water absorption structure for sinus tract cannulation according to claim 2, characterized in that, The receiving cavity (311) includes a first cavity (3111) and a second cavity (3112) that are interconnected. The first cavity (3111) is used to receive the bladder body (32), and the second cavity (3112) is used to receive the first mounting block (341), the second mounting block (342) and the third mounting block (343). The outer wall of the mounting cylinder (31) is recessed inward to form a locking cavity (312) that is linked with the second cavity (3112). In the locked state, the sliding end of the first locking rod (351) extends into the locking cavity (312) so that the negative pressure bladder (3) is kept in the locked state.

4. The external water absorption structure for sinus tract cannulation according to claim 3, characterized in that, The second cavity (3112) is configured as a plurality of such cavities, which are spaced apart circumferentially along the receiving cavity (311).

5. The external water absorption structure for sinus tract cannulation according to claim 3, characterized in that, The negative pressure bladder (3) also includes an unlocking component (37) installed in the locking cavity (312). The unlocking component (37) includes an unlocking block (371) and a second elastic body (372). One end of the second elastic body (372) is connected to the mounting cylinder (31), and the other end of the second elastic body (372) is connected to the unlocking block (371). At least a portion of the unlocking block (371) protrudes from the locking cavity (312). The unlocking block (371) is configured to move inward along the locking cavity (312) to expel the first locking rod (351) from the locking cavity (312) so that the negative pressure bladder (3) switches from the locked state to the unlocked state.

6. The external water absorption structure for sinus tract cannulation according to claim 5, characterized in that, The second cavity (3112) is configured as a plurality of such cavities, which are spaced apart circumferentially along the receiving cavity (311); The unlocking element (37) is configured in multiple ways, and each of the multiple unlocking elements (37) corresponds to one of the multiple second cavities (3112). The unlocking element (37) also includes an unlocking ring (373), which is movably sleeved on the outside of the mounting cylinder (31). The unlocking ring (373) is configured to slide along the outer wall of the mounting cylinder (31) to simultaneously squeeze all the unlocking blocks (371) into the locking cavity (312) to switch the negative pressure bladder (3) from the locked state to the unlocked state.

7. The external water absorption structure for sinus tract cannulation according to claim 1, characterized in that, The liquid storage bag (5) is equipped with a hydrophobic bacterial filter (51) for air discharge.

8. The external water absorption structure for sinus tract cannulation according to claim 1, characterized in that, The liquid storage bag (5) is also provided with a liquid level marking line (52).

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