In-vitro water absorption structure of sinus tract cannula

Abstract

The invention provides a sinus tract cannula in-vitro water absorption structure, which relates to the technical field of sinus tract cannula in-vitro water absorption, and comprises a drainage tube, an attachment part, 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 being inserted into the sinus tract and used for absorbing seepage of the sinus tract, and the attachment piece is connected with the drainage tube and used for being attached to the skin of a patient so that the drainage tube can be detachably attached to the skin and block the sinus tract; the inlet end of the first one-way valve is connected with the end, away from the sinus tract, of the drainage tube, the outlet end of the first one-way valve communicates with an inlet of the negative pressure bag, and the negative pressure bag is constructed to be capable of automatically recovering elasticity and generating negative pressure on the drainage tube when being released after being manually extruded; the inlet end of the second one-way valve is communicated 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 in-vitro water absorption structure of the sinus tract cannula has the advantages of being simple in structure, low in cost, capable of being managed by a patient autonomously, not limited in activity and the like.

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, 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, for example, the system is complex, the cost is high, a large negative pressure source is needed, the patient's activity is severely limited, it is not suitable for superficial and moderate exudation sinus, and it 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: 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. One end of the drainage tube is used for insertion into the sinus and for absorbing sinus exudate, the attachment is connected with 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; 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 in detachable communication with the liquid storage bag.

[0007] Optionally, the drainage tube comprises a ball-shaped portion and a tubular portion connected with each other, the ball-shaped portion is used for being inserted into the sinus, a plurality of liquid inlet holes are respectively formed on one side of the ball-shaped portion close to the tubular portion and the tubular wall of the tubular portion close to the ball-shaped portion.

[0008] 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, 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 being adsorbed 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.

[0009] 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. One end of the first locking rod is rotatably mounted on the first mounting block, the second mounting block is provided with a first sliding groove for slidably mounting 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 provided with a second sliding groove for slidably mounting the other end of the second locking rod, and the blocking block is rotatably mounted in the second mounting block, one end of the blocking block extends into the first sliding groove, and the other end of the blocking block extends into the second sliding groove. 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 respectively crossed with a first direction, the first locking rod is locked in the accommodating cavity, and the second locking rod is in abutment with 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 abutment on the second locking rod. The first direction is an axial direction of the bag body.

[0010] 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. The outer wall of the mounting cylinder is inwardly recessed to form a locking cavity in linkage 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.

[0011] Optionally, the second cavity is provided in a plurality of forms, and the plurality of second cavities are arranged in a circumferential direction of the accommodating cavity.

[0012] 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. 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.

[0013] Optionally, the second cavity is provided in a plurality of forms, and the plurality of second cavities are arranged in a circumferential direction of the accommodating cavity. The unlocking member is provided in a plurality of forms, and the plurality of unlocking members are arranged in one-to-one correspondence with the plurality of second cavities. 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.

[0014] Optionally, a hydrophobic bacteria filter for discharging air is arranged on the liquid storage bag.

[0015] Optionally, a liquid level marking line is further arranged on the liquid storage bag.

[0016] Advantages: 1、Through the above technical scheme, first, the sinus cannula external water absorption structure of the application only includes a small amount of structure (for example, a drainage tube, a paste accessory, a negative pressure bag, etc.). Compared with the existing negative pressure closed drainage system (which requires a large negative pressure source and a complex pipeline), the scheme of the application adopts a mechanical negative pressure bag and a simple valve, without the need for electricity or external equipment, which can effectively reduce the manufacturing cost and maintenance difficulty, and is very suitable for application scenarios such as primary medical care, carrying, home use, etc.

[0017] Second, the negative pressure bag of the application is configured to generate negative pressure by manual extrusion, and the patient can master it after simple learning, and can operate it by himself without the assistance of professional medical personnel in actual use. At the same time, the whole device is light and small, without bulky external equipment, and the patient can move relatively freely after wearing it, without being limited by bed rest or fixed negative pressure source, which can effectively ensure the life quality of the patient.

[0018] Third, the negative pressure bag of the application has the automatic elastic recovery characteristic, and can generate negative pressure in the drainage tube after manual extrusion and release, and in combination with the flow direction control of the first one-way valve and the second one-way valve, the unidirectional flow of the exudate can be effectively ensured, the backflow can be avoided, and the continuity and stability of the negative pressure can be maintained. In this way, the problems of low absorption efficiency of gauze strip drainage and easy formation of false healing can be effectively solved.

[0019] Fourth, the scheme of the application actively attracts the sinus exudate by negative pressure, which can be efficiently sucked into the drainage tube and finally transferred to the storage bag, which is more efficient than the passive drainage of gauze strip relying on capillary action. At the same time, the storage bag is detachable, which is convenient for emptying or replacing, can effectively reduce the replacement frequency, and reduce the pain and infection risk of the patient.

[0020] Fifth, the paste accessory of the application can stably and reliably fix the drainage tube on the skin and form a blockage at the sinus opening, which not only can effectively realize the stable and reliable fixation of the whole sinus cannula external water absorption structure, but also can effectively avoid the exudate leakage and external pollution.

[0021] 2、The other advantages or advantages of the application will be described in detail in the specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the drawings needed in the embodiment description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0023] Among them: Figure 1 is a perspective view of a sinus cannula water absorption structure provided by an exemplary embodiment of the present application; Figure 2 is a partial cutaway view of a mounting cylinder provided by an exemplary embodiment of the present application; Figure 3 is a perspective view of a capsule body from one angle provided by an exemplary embodiment of the present application; Figure 4 is a perspective view of a capsule body from another angle provided by an exemplary embodiment of the present application; Figure 5 is a structural view of a negative pressure capsule provided by an exemplary embodiment of the present application, wherein the negative pressure capsule is in a locked state; Figure 6 is a partial structural enlarged view of A in Figure 5 Figure 7 is a structural view of a negative pressure capsule provided by an exemplary embodiment of the present application, wherein the negative pressure capsule is in a starting unlocked state; Figure 8 is a partial structural enlarged view of B in Figure 7 Figure 9 is an assembled structural view of a first elastic body, a first mounting block, a second mounting block and a third mounting block provided by an exemplary embodiment of the present application.

[0024] Explanation of reference numerals in the drawings: 100 - sinus cannula water absorption structure; 1 - drainage tube; 11 - spherical portion; 12 - tubular portion; 13 - liquid inlet hole; 2 - adhesive accessory; 21 - suction cup body; 22 - through hole; 3 - negative pressure capsule; 31 - mounting cylinder; 311 - accommodating cavity; 3111 - first cavity; 3112 - second cavity; 312 - locking cavity; 32 - capsule body; 321 - top wall; 3211 - first communication hole; 322 - bottom wall; 3221 - second communication hole; 323 - pleated edge wall; 33 - first elastic body; 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 piece; 371 - unlocking block; 372 - second elastic body; 373 - unlocking ring; 4 - first one-way valve; 5 - liquid storage bag; 51 - hydrophobic bacterial filter; 52 - liquid level marker line; 6 - second one-way valve. DETAILED DESCRIPTION

[0025] ​​In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application.

[0026] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by a person of ordinary skill in the art without creative labor based on the embodiments in the present application belong to the scope of protection of the present application.

[0027] The technical solutions of the present application will be described in detail below with reference to the drawings.

[0028] As shown in Figures 1 to 9 The present application provides a sinus cannula external water absorption structure 100, which comprises a drainage tube 1, a sticking accessory 2, a negative pressure bag 3, a first one-way valve 4, a liquid storage bag 5 and a second one-way valve 6. One end of the drainage tube 1 is used for insertion into the sinus and for absorbing sinus exudate. The sticking accessory 2 is connected with the drainage tube 1 and is used for being attached to the skin of a patient, so as to detachably attach the drainage tube 1 to the skin and block the sinus opening. The inlet end of the first one-way valve 4 is connected with the end of the drainage tube 1 away from the sinus. The outlet end of the first one-way valve 4 is in communication with the inlet of the negative pressure bag 3. The negative pressure bag 3 is configured to automatically elastically recover and generate negative pressure to the drainage tube 1 when it is released after being manually squeezed. The inlet end of the second one-way valve 6 is in communication with the outlet of the negative pressure bag 3. The outlet of the second one-way valve 6 is detachably communicated with the liquid storage bag 5.

[0029] Through the above technical solution, first, the sinus cannula external water absorption structure 100 of the present application only comprises a small number of structures (for example, the drainage tube 1, the sticking accessory 2, the negative pressure bag 3, etc.). Compared with the existing negative pressure closed drainage system (which needs a large negative pressure source and a complex pipeline), the scheme of the present application adopts a mechanical negative pressure bag 3 and a simple valve, without the need for electricity or external equipment, which can effectively reduce the manufacturing cost and the maintenance difficulty, and is very suitable for application scenarios such as primary medical care, carrying on the body, home use, etc.

[0030] Second, the negative pressure bag 3 of the present application is configured to generate negative pressure by manual squeezing. After simple learning, the patient can master it, and can operate it by himself without the assistance of professional medical personnel in actual use. At the same time, the whole device is light and small, without bulky external equipment. After the patient wears it, he can also move relatively freely, without being limited by bed rest or fixed negative pressure source, which can effectively ensure the life quality of the patient.

[0031] Thirdly, the negative pressure bag 3 of the present application has the automatic elastic recovery feature, which can generate negative pressure in the drainage tube 1 after being manually squeezed and released, and in combination with the flow direction control of the first one-way valve 4 and the second one-way valve 6, can effectively ensure the one-way flow of the exudate, avoid backflow, and maintain the continuity and stability of the negative pressure. In this way, the problems of low absorption efficiency of gauze strips and easy formation of false healing can be effectively solved.

[0032] Fourthly, the scheme of the present application can efficiently absorb the sinus exudate into the drainage tube 1 and finally transfer it into the storage bag 5 through active suction of negative pressure, which is more efficient than the passive drainage of gauze strips relying on capillary action. At the same time, the storage bag 5 is detachable, which is convenient for emptying or replacing, can effectively reduce the replacement frequency, and reduce the pain and infection risk of patients.

[0033] Fifthly, the adhesive accessory 2 of the present application can stably and reliably fix the drainage tube 1 on the skin and form a blockage at the sinus opening, which not only can effectively realize the stable and reliable fixation of the entire sinus intubation tube external water absorption structure 100, but also can effectively avoid exudate leakage and external pollution.

[0034] In order to facilitate the understanding of relevant technical personnel, the working process / principle of the present application is described below in combination with the drawings.

[0035] Firstly, one end of the drainage tube 1 can be inserted into the target sinus, and then the adhesive accessory 2 is attached to the skin of the patient, so as to fix and seal the sinus opening of the drainage tube 1, preventing air leakage or exudate overflow. Then, the patient or the operator can manually squeeze the negative pressure bag 3. When squeezed, the air in the negative pressure bag 3 will be discharged (the storage bag 5 can be installed after the air is discharged, or the storage bag 5 can be installed before the air is discharged, and accordingly, a corresponding air drainage and drainage device needs to be provided on the storage bag 5, for example, the hydrophobic bacterial filter 51 described below); after release, the negative pressure bag 3 automatically recovers to its original state by relying on its own elasticity, and the internal volume increases, generating negative pressure on the drainage tube 1. Under the action of negative pressure, the exudate in the sinus is sucked 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. In this process, the exudate will accumulate in the negative pressure bag 3. When the negative pressure bag 3 completely recovers to the original state, it can be squeezed again, and the exudate in the internal will enter the storage bag 5 through the second one-way valve 6. In this way, by repeatedly squeezing and releasing the negative pressure bag 3, negative pressure can be generated for a long time, and the exudate can continuously flow from the sinus to the drainage tube 1, the first one-way valve 4, the negative pressure bag 3, and the second one-way valve 6, and finally enter the storage bag 5. The storage bag 5 is detachable, and when it is full, it can be directly replaced or emptied without affecting the drainage process.

[0036] In one embodiment of the present application, as shown in Figure 1As shown, the drainage tube 1 of the present application can include a bulbous portion 11 and a tubular portion 12 connected to each other, the bulbous portion 11 is used to be inserted into the sinus tract, and a plurality of liquid inlet holes 13 are formed on the side of the bulbous portion 11 close to the tubular portion 12 and the tube wall of the tubular portion 12 close to the bulbous portion 11, respectively.

[0037] In this embodiment, first, by arranging the bulbous portion 11 in this way and inserting it into the deep part of the sinus tract, the contact area with the inner wall of the sinus tract and the exudate can be significantly increased, compared with a single straight tube, the bulbous structure and the tubular portion 12 connected thereto are less likely to be completely wrapped or adsorbed by the inner wall of the sinus tract, and more space can be created for the exudate to flow in. At the same time, distributing the liquid inlet holes 13 in two areas, i.e. the root of the bulbous portion 11 (the side close to the tubular portion 12) and the tube wall of the adjacent tubular portion 12, can form a multi-area and three-dimensional water inlet layout. In this way, it can be ensured that even if some of the holes on the bulbous portion 11 in the deep part of the sinus tract are temporarily blocked by contacting the tissue or a small amount of foreign matter, the holes on the tubular portion 12 closer to the sinus tract opening can still work normally and continuously absorb the liquid. In this way, the risk of a single hole being blocked causing the entire drainage system to fail can be effectively reduced, ensuring the continuity and reliability of the drainage.

[0038] Second, the smooth shape of the bulbous portion 11 avoids sharp corners, which can effectively reduce the risk of scratching or compressive injury to the fragile granulation tissue or newly formed epithelial tissue when inserted into the sinus tract. At the same time, the dispersion of multiple liquid inlet holes 13 on the bulbous portion 11 and the tubular portion 12 allows the negative pressure to act more evenly on different depth areas in the sinus tract, rather than being concentrated on a single point. In this way, it helps to prevent the pain, bleeding or tissue damage (i.e. the phenomenon of sucking meat) that may be caused by the traditional single-hole drainage tube 1 when the local tissue is excessively adsorbed and embedded in the hole, making the negative pressure drainage more gentle and safe.

[0039] Third, the bulbous portion 11 acts as an anchor point, which can provide a better anchoring effect than a straight tube with uniform thickness when it is placed in the sinus tract. In this way, it can effectively prevent the drainage tube 1 from being excessively displaced or pulled out during use due to patient activity or accidental pulling, thereby ensuring the correct positioning of the drainage end and maintaining stable drainage effect.

[0040] In one embodiment of the present application, the adhesive accessory 2 of the present application can include a base plate dressing and an adhesive strip, the base plate dressing is used for the stoma and the drainage tube 1 is arranged through the base plate dressing, and the adhesive strip is used to attach the base plate dressing to the skin of the patient.

[0041] In this way, the thus arranged base plate dressing (e.g. ostomy base plate, hydrocolloid dressing, microporous dressing, etc.) and the adhesive strip can ensure that a firm and sealed connection is formed between the adhesive 2 and the skin. In this way, leakage of the negative pressure can be effectively prevented, ensuring that the negative pressure generated by the negative pressure bag 3 can effectively act on the inside of the sinus, while avoiding contamination of the surrounding skin or clothing by leakage of the sinus.

[0042] At the same time, the base plate dressing can be made of a low-sensitizing, breathable medical material, which can reduce the irritation to the skin caused by long-term adhesion and prevent the occurrence of contact dermatitis. In this way, a more comfortable experience can be provided for patients who need long-term drainage.

[0043] In an embodiment of the present application, as shown in Figure 1 The adhesive 2 of the present application can be arranged as a flexible suction cup, which includes a suction cup body 21, a through hole 22 arranged on the suction cup body 21, and a blocking gauze (not shown) arranged in the suction cup body 21. The suction cup body 21 is used to be adsorbed on the skin of the patient, the through hole 22 is used for the drainage tube 1 to pass through, and the blocking gauze is used to block the sinus opening.

[0044] In this way, the suction cup body 21 is adsorbed on the skin of the patient to achieve fixation, which can completely avoid the use of adhesive, and can effectively adapt to patients who are allergic to medical adhesive tape or dressing glue, patients with poor skin condition (such as maceration, damage), or parts with abundant hair that are not easy to paste. At the same time, the adsorption of the suction cup body 21 itself forms a local negative pressure area between the suction cup and the skin, which not only fixes the device, but also produces a slight and beneficial compression and stability effect on the tissue around the sinus opening. In addition, the built-in blocking gauze can further ensure that the sinus opening is effectively blocked and works together with the adsorption force of the suction cup to maintain the integrity of the seal.

[0045] In an embodiment of the present application, as shown in Figures 1 to 9As shown, the negative pressure bag 3 of the present application can include a mounting 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 mounting cylinder 31 is sleeved outside the drainage tube 1 and the other end is inwardly recessed to form a containing cavity 311 for containing the bag body 32, the bag body 32 includes oppositely arranged top and bottom walls 321 and 322 and an annular pleated edge wall 323 connected between the top and bottom walls 321 and 322, the top wall 321 is provided with a first communication hole 3211 in communication with the drainage tube 1, the bottom wall 322 is provided with a second communication hole 3221 in communication with the second one-way valve 6, the top wall 321, the pleated edge wall 323 and the bottom wall 322 are connected with the first mounting block 341, the second mounting block 342 and the third mounting block 343 respectively, and the two first elastic bodies 33 are arranged between the first mounting block 341, the second mounting block 342 and the third mounting block 343 respectively; one end of the first locking rod 351 is rotatably mounted on the first mounting block 341, the second mounting block 342 is formed with a first sliding groove 3421 for slidingly mounting the other end of the first locking rod 351, one end of the second locking rod 352 is rotatably mounted on the third mounting block 343, the second mounting block 342 is formed with a second sliding groove 3422 for slidingly mounting the other end of the second locking rod 352, and the blocking block 36 is rotatably mounted in the second mounting block 342, and one end of the blocking block 36 extends into the first sliding groove 3421 and the other end extends into the second sliding groove 3422.

[0046] 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 crossed with the first direction respectively, and the first locking rod 351 is locked in the containing 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 containing 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 remove the abutting effect on the second locking rod 352; wherein the first direction is the axial direction of the bag body 32.

[0047] Firstly, the technical solution can realize the release control of negative pressure. Specifically, in the locked state, the first elastic body 33 is compressed, but the whole capsule body 32 is forced to be kept in the compressed state through the mutual abutting action of the first locking rod 351 and the second locking rod 352 and the blocking block 36. This means that the user can exert a larger extrusion force on the negative pressure capsule 3 and lock it, so as to release the negative pressure at any time when drainage is needed. When drainage is needed, through the unlocking operation, the capsule body 32 will start to expand under the action of the first elastic body 33 and continuously generate negative pressure.

[0048] Secondly, the negative pressure generation process is designed as a two-stage linkage trigger. In the first stage of the negative pressure generation process, only the first locking rod 351 needs to be operated to be unlocked, which will 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 the maximum position (i.e., the first locking rod 351 is flush with the first direction), it will automatically trigger the rotation of the blocking block 36, thereby releasing the restriction on the second locking rod 352, and further causing the second stage of the negative pressure generation process to occur. In this way, the whole negative pressure generation process of the capsule body 32 can be divided into two continuous processes, which not only can avoid generating excessive negative pressure (avoiding excessive suction, stimulation or pain), improving the safety and comfort of the drainage process, but also can effectively prolong the duration of the negative pressure effect (lengthening the overall volume recovery process of the capsule body 32, thereby enabling the negative pressure generated thereby to be stable and reliable for a longer period of time, providing more sufficient suction time for the seepage of the sinus, which can significantly improve the effective drainage efficiency of a single operation and overcome the problem of rapid negative pressure decay of the simple negative pressure capsule 3).

[0049] Thirdly, by setting the first mounting block 341, the second mounting block 342 and the third mounting block 343, and placing the first elastic body 33 between them, the top wall 321, the pleated side wall 323 and the bottom wall 322 of the capsule body 32 are connected with these mounting blocks respectively, the force transmission path is very clear and efficient, and the compression force is directly transmitted to the first elastic body 33 for storage through the corresponding mounting blocks; when rebounding, the force of the first elastic body 33 also acts on each part of the capsule body through the mounting blocks, ensuring that it expands uniformly and smoothly. This design integrates complex moving parts in a compact mounting cylinder 31, which can effectively realize the compactness of the mechanical structure.

[0050] In this embodiment, it needs to be particularly pointed out that when the capsule body 32 needs to be compressed, the negative pressure capsule 3 can be inverted, so that the blocking block 36 can avoid the movement path of the second locking rod 352 (such as Figure 7 and Figure 8As shown in FIG. 6, the first mounting block 341, the second mounting block 342 and the third mounting block 343 are close to each other, and the first locking rod 351 and the second locking rod 352 are in the locked state (as shown in FIG. 7), so that the capsule body 32 is compressed again, the first mounting block 341, the second mounting block 342 and the third mounting block 343 can be close to each other, and the corresponding first locking rod 351 and the second locking rod 352 can be smoothly rotated to the locked state (as shown in FIG. 7) Figure 5 and Figure 6 As shown in FIG. 6, the first mounting block 341, the second mounting block 342 and the third mounting block 343 are close to each other, and the first locking rod 351 and the second locking rod 352 are in the locked state (as shown in FIG. 7), so that the capsule body 32 is compressed again, the first mounting block 341, the second mounting block 342 and the third mounting block 343 can be close to each other, and the corresponding first locking rod 351 and the second locking rod 352 can be smoothly rotated to the locked state (as shown in FIG. 7)

[0051] In addition, it can be understood that the negative pressure capsule 3 and the liquid storage bag 5 can also be temporarily fixed to the skin of the patient by using other fixing structures (for example, adhesive strips), so that the sinus canal intubation water absorption structure 100 of the present application can reliably play its drainage role and improve the drainage effect.

[0052] In an embodiment of the present application, as shown in Figure 2 , Figure 5 and Figure 6 The accommodating cavity 311 of the present application can include a first cavity 3111 and a second cavity 3112 in communication with each other, the first cavity 3111 is used to accommodate the capsule body 32, and the second cavity 3112 is used to accommodate the first mounting block 341, the second mounting block 342 and the third mounting block 343; wherein the outer wall of the mounting cylinder 31 is inwardly recessed to form a locking cavity 312 linked with the second cavity 3112, and the sliding end of the first locking rod 351 is partially inserted into the locking cavity 312 in the locked state, so that the negative pressure capsule 3 is maintained in the locked state.

[0053] In this way, first, the first cavity 3111 is used to accommodate and protect the capsule body 32, providing a dedicated and undisturbed space for its expansion and contraction, ensuring the reliability of the negative pressure generation core function. At the same time, the second cavity 3112 serves as a mechanical action space for accommodating the core moving parts of the locking / unlocking mechanism such as the first mounting block 341, the second mounting block 342 and the third mounting block 343, and forms a certain limiting and guiding effect. In this way, this isolation design can effectively ensure that the capsule body 32 deforms smoothly, and the locking / unlocking mechanism can smoothly lock and unlock.

[0054] Second, a locking cavity 312 is specially provided on the outer wall of the mounting cylinder 31 and is linked with the second cavity 3112, which provides a clear and stable "clamping groove" 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 touching, and ensuring that the pre-stored negative pressure can be safely and reliably maintained.

[0055] Thirdly, the structure of the locking cavity 312 is designed so that the user can feel a clear "click" or resistance change when operating the first locking rod 351 into the locking position, that is, the tactile feedback of the sliding end of the first locking rod 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 the operation.

[0056] In an embodiment of the present application, as shown in Figure 2 The second cavity 3112 of the present application can be provided in several, and the several second cavities 3112 are arranged along the circumference of the containing cavity 311.

[0057] In this way, first, by arranging several second cavities 3112 along the circumference, it means that the locking mechanism associated with it (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 capsule body 32. When the negative pressure capsule 3 is compressed and locked, the stored elastic force will be evenly distributed to these circumferentially distributed locking points. In this way, it can effectively avoid the stress concentration phenomenon that may occur in single-point locking structure, prevent component fatigue, deformation or accidental unlocking due to long-term unilateral stress, and ensure the high stability of the locked state.

[0058] Secondly, single-point locking may cause the capsule body 32 to move non-axially and eccentrically when rebounding, thereby affecting the uniformity and efficiency of the negative pressure effect. The circumferential multi-point locking design provides a guide rail for the movement of the capsule body 32, forcing it to expand and contract smoothly along the predetermined axial direction (i.e. the first direction). In this way, it can ensure that the negative pressure can be concentrated and efficiently applied to the drainage tube 1, improving the reliability and consistency of the drainage effect.

[0059] In an embodiment of the present application, as shown in Figure 6 and Figure 8 As shown in the drawings, the negative pressure capsule 3 of the present application can also include an unlocking piece 37 installed in the locking cavity 312, the unlocking piece 37 including an unlocking block 371 and a second elastic body 372, one end of the second elastic body 372 being connected with the mounting cylinder 31, the other end of the second elastic body 372 being connected with the unlocking block 371, at least part of the unlocking block 371 protruding from the locking cavity 312; the unlocking block 371 is configured to be able to move inward along the locking cavity 312 to extrude the first locking rod 351 out of the locking cavity 312, so as to switch the negative pressure capsule 3 from the locked state to the unlocked state.

[0060] First, the unlocking block 371 partially protrudes from the locking cavity 312, providing a clear and explicit physical operation point for the user. The user does not need to search for or directly manipulate the first locking rod 351 itself, which may be small or difficult to access, but only needs to press the protruding unlocking block 371 directly. In this way, the unlocking operation can be effectively simplified, making it intuitive and convenient, especially suitable for situations where patients may operate themselves, improving the ease of use and user experience of the device.

[0061] Second, by pressing the unlocking block 371, its inward movement can extrude the first locking rod 351 out of the locking cavity 312. This design is an indirect and transmitted unlocking method. It can avoid direct and possibly improper pulling of the locking rod, preventing deformation or damage of the components due to improper operation. The unlocking process is guided by a dedicated part, making it more stable and reliable, and protecting the integrity of the internal precision locking mechanism.

[0062] Third, the presence of the second elastic body 372 allows the unlocking piece 37 to automatically return to its initial position (i.e., the state where the unlocking block 371 partially protrudes) under the action of the elastic force once the user releases the pressed unlocking block 371. This means that after each unlocking operation, the unlocking device will immediately reset, preparing for the next lock-unlock cycle. In this way, the continuity and rapid reusability of the device function can be ensured, without the need for manual resetting of the unlocking mechanism.

[0063] Fourth, the unlocking block 371 needs to be actively pressed inward to trigger unlocking, which is significantly different from accidental scratches or touches (usually horizontal) that may occur in daily life. Therefore, this design can provide convenient and active unlocking while reducing the risk of accidental unlocking due to accidental contact, enhancing safety during use.

[0064] In one embodiment of the present application, as shown in Figure 2 , Figure 6 and Figure 8 , the second cavity 3112 of the present application can be provided in several, and the several second cavities 3112 are arranged along the circumference of the accommodation cavity 311; the unlocking piece 37 is provided in several, and the several unlocking pieces 37 are arranged one-to-one with the several second cavities 3112, and the unlocking piece 37 further includes an unlocking ring 373 movably sleeved outside the mounting cylinder 31, and the unlocking ring 373 is configured to slide along the outer wall of the mounting cylinder 31 to simultaneously extrude all the unlocking blocks 371 into the locking cavities 312, so as to switch the negative pressure bag 3 from the locked state to the unlocked state.

[0065] Thus, first, by a slidable unlocking ring 373, the user only needs to perform a single, simple straight sliding action (such as pushing or sliding the unlocking ring 373) to simultaneously apply pressure to all circumferentially distributed unlocking blocks 371 through the ring. This ensures that several locking points are instantaneously and synchronously unlocked. The cumbersome operation and inconvenience of the user needing to press each unlocking block 371 one by one, possibly in a certain order, can be completely eliminated, especially for patients with difficulty in hand movement, which greatly improves the operability and convenience. At the same time, synchronous unlocking ensures that the capsule body 32 can instantaneously and uniformly rebound in the axial direction, avoiding the possibility of partial mechanism jamming or capsule body deflection due to asynchronous unlocking.

[0066] Second, a single unlocking block 371 may require a precise pressing point and a certain force. The unlocking ring 373 disperses and simultaneously transmits the operating force to all unlocking blocks 371 through its annular structure, making the unlocking action more labor-saving and fault-tolerant. Even if the user's pushing force is slightly tilted, the unlocking ring 373 can ensure that all unlocking blocks 371 receive sufficient and generally consistent driving force, thereby reliably completing the unlocking function and reducing the probability of unlocking failure due to improper operation.

[0067] In this embodiment, it needs to be particularly pointed out that, in order to avoid 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, as shown in the structures shown in Figure 1 and Figure 2 .

[0068] In an embodiment of the present application, as shown in Figure 1 , a hydrophobic bacterial filter 51 can be provided on the liquid storage bag 5 of the present application for air exhaust.

[0069] Thus, first, during the drainage process, as the exudate continuously enters the liquid storage bag 5, the air in the bag needs to be exhausted to make room for the liquid. The hydrophobic bacterial filter 51 provides a one-way, controlled exhaust channel for the air in the bag. It allows air to be freely exhausted, thereby ensuring that the liquid storage bag 5 will not affect the continuous drainage due to the accumulation of positive pressure, maintaining the long-term effectiveness of the entire drainage system function.

[0070] Second, the hydrophobic bacterial filter 51, as a medical-grade filter membrane, has a very small pore size that can effectively block microorganisms, while its hydrophobic property ensures that liquids (including exudate and moisture in the air) will not clog the filter membrane pores. Therefore, under the premise of ensuring smooth air exhaust, this design establishes a reliable biological safety barrier to prevent the collected exudate from becoming a breeding ground for bacteria, which contaminates the drainage system or even the sinus wound, significantly reducing the risk of secondary infection.

[0071] In one embodiment of the present application, as shown in Figure 1 The liquid level marking line 52 can also be provided on the liquid storage bag 5.

[0072] In this way, first, the liquid level marking line 52 provides an intuitive scale for the patient or medical staff to easily and accurately read the amount of exudate collected in the liquid storage bag 5. At the same time, it also enables them to judge the drainage condition and wound recovery status according to the change of the liquid level, and to replace or empty the liquid storage bag 5 in time when it is about to be full. Thus, the risk of overfilling of exudate, which may cause leakage or reverse contamination, due to inaccurate judgment of the liquid volume can be avoided.

[0073] Second, the patient or medical staff can roughly quantify the amount of exudate by observing the position of the marking line reached by the exudate in a unit of time, which has a positive auxiliary role in monitoring the progress of the disease (such as whether the exudate is gradually decreasing) and feeding back information to the doctor.

[0074] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any change or replacement within the technical scope disclosed by the present application should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An in-vitro water absorbing structure for a sinus cannula, characterised in that, The device comprises a drainage tube (1), a sticking accessory (2), a negative pressure bag (3), a first one-way valve (4), a liquid storage bag (5) and a second one-way valve (6). One end of the drainage tube (1) is used for insertion into a sinus and for absorbing sinus exudate, the sticking accessory (2) is connected with the drainage tube (1) and is used for sticking on the skin of a patient, so as to detachably stick the drainage tube (1) on the skin and block the sinus opening; The inlet end of the first one-way valve (4) is connected with the end of the drainage tube (1) away from the sinus, the outlet end of the first one-way valve (4) is in communication with the inlet of the negative pressure bag (3), and the negative pressure bag (3) is configured to automatically elastically recover and generate negative pressure on the drainage tube (1) when it is released after being manually squeezed; The inlet end of the second one-way valve (6) is in communication with the outlet of the negative pressure bag (3), and the outlet of the second one-way valve (6) is detachably communicated with the liquid storage bag (5); The drainage tube (1) comprises a spherical part (11) and a tubular part (12) connected with each other, the spherical part (11) is used for insertion into a sinus, and a plurality of liquid inlet holes (13) are formed on the side of the spherical part (11) close to the tubular part (12) and the tubular wall of the tubular part (12) close to the spherical part (11), respectively.

2. The sinus cannula in-vitro wicking structure of claim 1, wherein, The sticking accessory (2) comprises a base disc dressing and a sticking strip, the base disc dressing is used for a stoma and is provided with the drainage tube (1), and the sticking strip is used for sticking the base disc dressing on the skin of a patient; or, The sticking accessory (2) is provided as a flexible suction cup, the flexible suction cup comprises a suction cup body (21), a through hole (22) formed on the suction cup body (21), and a blocking gauze arranged in the suction cup body (21), the suction cup body (21) is used for adsorption on the skin of a patient, the through hole (22) is used for the drainage tube (1) to pass through, and the blocking gauze is used for blocking the sinus opening.

3. The sinus cannula in-vitro wicking structure of claim 1, wherein, The negative pressure bag (3) comprises a mounting 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 mounting cylinder (31) is sleeved outside the drainage tube (1), the other end is inwardly recessed to form a containing cavity (311) for containing the bag body (32), the bag body (32) comprises oppositely arranged top and bottom walls (321) and (322) and an annular pleated edge wall (323) connected and enclosed between the top and bottom walls (321) and (322), the top wall (321) is provided with a first communication hole (3211) in communication with the drainage tube (1), the bottom wall (322) is provided with a second communication hole (3221) in communication with the second one-way valve (6), the top wall (321), the pleated edge wall (323) and the bottom wall (322) are connected with the first mounting block (341), the second mounting block (342) and the third mounting block (343) respectively, and the two first elastic bodies (33) are arranged between the first mounting block (341), the second mounting block (342) and the third mounting block (343) respectively; One end of the first locking rod (351) is rotatably mounted on the first mounting block (341), the second mounting block (342) is formed with a first sliding groove (3421) for slidingly mounting the other end of the first locking rod (351), one end of the second locking rod (352) is rotatably mounted on the third mounting block (343), the second mounting block (342) is formed with a second sliding groove (3422) for slidingly mounting the other end of the second locking rod (352), and the blocking block (36) is rotatably mounted in the second mounting block (342), and one end of the blocking block (36) extends into the first sliding groove (3421) and the other end extends into the second sliding groove (3422); The negative pressure bag (3) comprises a locking state and an unlocking state, in the locking 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 crossed with the first direction, the first locking rod (351) is locked in the containing cavity (311), and the second locking rod (352) abuts against the blocking block (36); in the unlocking state, the first locking rod (351) is unlocked in the containing 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 effect on the second locking rod (352); wherein the first direction is the axial direction of the bag body (32).

4. The sinus cannula in-vitro wicking structure of claim 3, wherein, The accommodating cavity (311) comprises a first cavity (3111) and a second cavity (3112) in communication with each other, the first cavity (3111) is used for accommodating the capsule body (32), and the second cavity (3112) is used for accommodating 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 inwardly recessed to form a locking cavity (312) linked with the second cavity (3112), and the sliding end of the first locking rod (351) is partially inserted into the locking cavity (312) in the locked state, so that the negative pressure capsule (3) is maintained in the locked state.

5. The sinus cannula in-vitro wicking structure of claim 4, wherein, The second cavity (3112) is provided in a plurality of forms and is arranged in a circumferential interval of the accommodating cavity (311).

6. The in-dwelling sinus cannula water absorbing structure according to claim 4, wherein, The negative pressure capsule (3) further comprises an unlocking member (37) mounted in the locking cavity (312), the unlocking member (37) comprises an unlocking block (371) and a second elastic body (372), one end of the second elastic body (372) is connected with the mounting cylinder (31), the other end of the second elastic body (372) is connected with the unlocking block (371), and at least part of the unlocking block (371) protrudes out of the locking cavity (312). The unlocking block (371) is configured to be movable inwardly along the locking cavity (312) to extrude the first locking rod (351) out of the locking cavity (312), so as to switch the negative pressure capsule (3) from the locked state to an unlocked state.

7. The sinus cannula in-vitro wicking structure of claim 6, wherein, The second cavity (3112) is provided in a plurality of forms and is arranged in a circumferential interval of the accommodating cavity (311). The unlocking member (37) is provided in a plurality of forms and is arranged in one-to-one correspondence with the plurality of second cavities (3112), and the unlocking member (37) further comprises an unlocking ring (373) movably sleeved outside the mounting cylinder (31), the unlocking ring (373) is configured to be slidable along the outer wall of the mounting cylinder (31) to simultaneously extrude all the unlocking blocks (371) into the locking cavity (312), so as to switch the negative pressure capsule (3) from the locked state to the unlocked state.

8. The sinus cannula in-vitro wicking structure of claim 1, wherein, A hydrophobic bacteria filter (51) for discharging air is arranged on the liquid storage bag (5).

9. The sinus cannula in-vitro wicking structure of claim 1, wherein, A liquid level marking line (52) is further arranged on the liquid storage bag (5).

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