A self-expanding medicine thread and dressing system thereof

Abstract

The utility model provides a self-expanding medicine thread and a dressing system thereof, which are used to solve the problem that the medicine thread cannot be well fixed in the sinus tract and the dressing is easy to remain in the sinus tract when used with a dressing; a self-expanding medicine thread and a dressing system thereof, wherein the medicine thread body is a solid or hollow cylindrical structure, the surface of the medicine thread has a medicine storage component formed by an inward depression, the medicine thread has a drainage channel, the medicine thread is placed in the sinus tract, the medicine thread is connected to the inside of the dressing, the dressing is placed on the skin around the sinus tract for use, and the surface of the dressing is covered with a biofilm.

Description

Technical Field

[0001] The utility model relates to the technical field of wound care equipment, in particular to a self-expanding medicine thread and a negative pressure drainage dressing system containing the medicine thread. Background Art

[0002] Drug-soaked drainage technology plays a vital role in the treatment of sinus tracts and fistulas, especially in complex cases that require continuous drug delivery and effective drainage. This technology achieves direct release of drugs to the target location by placing drug-soaked threads or belts into the lesion area, while using the physical structure of the drug thread itself to promote the drainage of fluid. This method is particularly effective for managing difficult-to-heal wounds such as sinus tracts and fistulas, because it not only clears wound fluid and reduces the chance of infection, but also acts directly on the lesion by continuously releasing antibiotics or other therapeutic drugs. The application of this technology has greatly improved the treatment effect and healing speed of such complex wounds, and is an important supplement to traditional drainage and drug dressing methods.

[0003] However, there are currently two main problems with medicated suture drainage: first, the expansion degree of the suture is uncontrollable and cannot be adjusted according to the patient's specific situation; second, during the negative pressure drainage treatment of sinus tracts, the elongated foam material is easily broken in the sinus tract due to insufficient tensile strength when it is removed, and the sponge debris is retained in the sinus tract and is difficult to remove, increasing the difficulty of treatment and the patient's pain. Utility Model Content

[0004] The utility model provides a self-expanding medicine thread and a dressing system thereof, which are used to solve the problem that the medicine thread cannot be well fixed in the sinus tract and the dressing is easy to remain in the sinus tract when used in combination with the dressing.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A self-expanding medicine thread and a dressing system thereof, wherein the medicine thread body is a solid or hollow cylindrical structure, the surface of the medicine thread has a medicine storage component formed by an inward depression, the medicine thread has a drainage channel, the medicine thread is placed in a sinus tract, the medicine thread is connected to the inside of a dressing, the dressing is placed on the skin around the sinus tract for use, and the surface of the dressing is covered with a biofilm.

[0007] Furthermore, the drug line is a solid drug line, and the outer surface of the solid drug line has a plurality of drug storage ball grooves, the drug storage ball grooves are formed by the outer surface being recessed inwards, and the drug storage ball grooves are hollow ball-segment structures.

[0008] Furthermore, the outer surface of the physical drug line has a plurality of drainage grooves, the drainage grooves are formed by the outer surface being recessed inwards, and the drainage grooves extend along the longitudinal direction of the physical drug line and pass through the upper and lower surfaces of the physical drug line.

[0009] Furthermore, the medicine line is a tubular medicine line in the shape of a hollow cylinder, the side surface of the tubular medicine line has several through drainage holes, the inner surface or outer surface of the tubular medicine line has several medicine storage grooves, the openings of the medicine storage grooves are located on the inner surface or outer surface, and the medicine storage grooves extend along the longitudinal direction of the tubular medicine line.

[0010] Furthermore, the medicine storage slot is a first medicine storage slot and a second medicine storage slot that are spaced apart, and the opening of the first medicine storage slot is larger than the opening of the second medicine storage slot.

[0011] Furthermore, at least one fixing ring is protruded outwardly on the outer surface of the medicine wire.

[0012] Furthermore, the center of the dressing has a dressing groove formed by an inward depression, the depth of the dressing groove is half the thickness of the dressing, and the diameter of the dressing groove is equivalent to the outer diameter of the expanded medicine thread.

[0013] Furthermore, it also includes: a dressing cover, the depth of the dressing cover is equivalent to the thickness of the dressing and the biofilm, and the center of the dressing cover is provided with a negative pressure connection port for passing a drainage tube.

[0014] Furthermore, the dressing cover is surrounded by an extension sheet, and the extension sheet is placed on the skin.

[0015] Furthermore, an adhesive sheet is fixed on the lower surface of the extension sheet for sealing and fixing the dressing cover on the skin.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] The drug line is fixed in the sinus after self-expansion. The drug line stores drugs through a hollow spherical structure or a strip-shaped drug storage groove. After expansion, the drugs are gradually released to achieve the effect of drug administration.

[0018] Drainage is carried out through the internal hollow structure or the drainage groove on the side surface, and a negative pressure drainage system is constructed by combining dressings, biofilms and drainage tubes to achieve negative pressure drainage of the sinus combined with drug lines;

[0019] The opening size of the hollow spherical cavity and the opening size and depth of the drug storage slot are adjustable to achieve the effect of long-term drug delivery.

[0020] The fixing ring increases the fixation of the drug line in the sinus tract and prevents the drug line from falling out of the sinus tract;

[0021] The dressing cover makes the assembly of the dressing system more convenient and quick. It can be snapped on and pasted on the skin surface to seal and fix it, making the negative pressure drainage effect better. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of the first type of drug thread in a self-expanding drug thread and a dressing system of the utility model;

[0023] Figure 2 This is a schematic diagram of the initial state of the second type of drug thread in the self-expanding drug thread and dressing system of the utility model;

[0024] Figure 3 This is a schematic diagram of the second type of drug thread after expansion in a self-expanding drug thread and a dressing system thereof of the utility model;

[0025] Figure 4 This is a schematic diagram of the structure of a third type of drug thread in a self-expanding drug thread and a dressing system of the utility model;

[0026] Figure 5 This is a first-view schematic diagram of a self-expanding cord and a dressing system of the utility model;

[0027] Figure 6 This is a second perspective schematic diagram of a self-expanding medicine thread and a dressing assembly in a dressing system of the utility model;

[0028] Figure 7 This is a schematic diagram of a self-expanding drug thread and a biofilm assembly in a dressing system of the utility model;

[0029] Figure 8 This is a first-view schematic diagram of a self-expanding medicine thread and a dressing cover in a dressing system of the utility model;

[0030] Fig. 9 This is a second viewing angle schematic diagram of a dressing cover in a self-expanding medicine thread and a dressing system thereof of the utility model.

[0031] Among them, 10-solid drug line, 11-drug storage ball groove, 12-drainage groove, 100-tubular drug line, 110-drainage hole, 120-drug storage strip groove, 121-first drug storage groove, 122-second drug storage groove, 130-fixing ring, 200-dressing, 210-dressing groove, 300-biofilm, 400-dressing cover, 410-negative pressure connection port, 420-extension sheet. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict.

[0033] In order to solve the problem of fixing the drug line in the sinus tract, the utility model is made of PHEMA (polyhydroxyethyl methacrylate) material with self-expansion properties. PHEMA (polyhydroxyethyl methacrylate) is a hydrogel material widely used in biomedicine and other fields. One of its most striking properties is its self-expansion ability, which makes PHEMA particularly suitable for application scenarios that require volume regulation. When exposed to moisture or physiological environments, PHEMA can absorb water and swell, thereby changing its volume. This expansion property makes PHEMA an ideal material for making implantable medical devices, drug delivery systems, and as a tissue engineering scaffold. The expansion process is reversible, and PHEMA can adjust its size according to changes in external conditions, providing extremely high adaptability and flexibility.

[0034] The following effects are achieved through structural optimization: automatic release of drug administration, smooth drainage of fluid in the sinus tract, and readjustment and assembly of the negative pressure drainage dressing system to avoid dressing residues remaining in the sinus tract. Example 1

[0035] This embodiment provides a structure of a self-expanding drug line, such as Figure 1 As shown, the main body of the self-expanding drug thread is a solid drug thread 10, and a plurality of hollow spherical notches, namely drug storage spherical grooves 11, are formed on the side surface of the solid drug thread 10, and drugs are stored in the drug storage spherical grooves 11. At the same time, a drainage groove 12 is formed on the side surface of the solid drug thread 10, and the direction of the drainage groove 12 extends along the longitudinal direction of the solid drug thread 10 and passes through the upper and lower surfaces of the solid drug thread 10.

[0036] When the solid drug line 10 expands, the opening of the drug storage ball groove 11 opens further, and the drug inside is gradually released. In this structure, the shape of the ball makes the opening smaller. After the inside is compacted and filled with drugs, the drugs will be properly stored in the drug storage ball groove 11 before use. Of course, in order to ensure that the drugs are retained in the drug storage balloon 11 during transportation and long-term storage, as one of the options, a covering film can be fixed on the surface of the drug storage ball groove 11. As the drug line expands, the covering film gradually cracks or detaches from the surface of the drug line, and the internal drugs are released at this time. Example 2

[0037] This embodiment provides another structure of a self-expanding medicine thread, which is more friendly to negative pressure drainage. In Embodiment 1, the drainage groove 12 has a small volume, and the drainage effect may be insufficient.

[0038] like Figure 2 and Figure 3 As shown, the main body of the medicine thread is a tubular medicine thread 100, which is a hollow cylindrical structure; on the side surface of the tubular medicine thread 100, especially near the bottom (placed at the bottom of the sinus when in use), there are several drainage holes 110, and the drainage holes 110 are circular through holes for draining the drainage fluid between the sinus and the tubular medicine thread 100 into the tube.

[0039] The inner surface of the tubular drug string 100 is inwardly recessed to form a drug storage slot 120, the opening of which is located on the inner surface of the tubular drug string 100. The drug storage slot 120 extends along the longitudinal direction of the tubular drug string 100, and drugs are pre-stored in the drug storage slot 120. Like the drug storage ball slot 11, when the tubular drug string 100 is expanded, the opening of the drug storage slot 120 is further opened, such as Figure 3 As shown, at this time, the drug flows out from the drug storage strip groove 120, and the outflowing drug flows into the sinus along the tubular drug line 100 and the drainage hole 110. Of course, as another option, the drug storage strip groove 120 can also be formed by being recessed inward from the outer surface of the tubular drug line 100, that is, the opening of the drug storage strip groove 120 is located on the outer surface of the tubular drug line 100. Example 3

[0040] As an optimized structure of Example 2, considering the time period of drug release, such as Figure 4 As shown, the depth of the drug storage slot 120 and the width of the opening are adjustable, thereby meeting the long-term release requirements of the drug. In this embodiment, the first drug storage slot 121 and the second drug storage slot 122 are arranged on the inner side of the tubular drug line 100 at intervals, and the opening of the first drug storage slot 121 is larger than the opening of the second drug storage slot. Therefore, after the tubular drug line 100 expands, the drug in the first drug storage slot 121 will be released preferentially and in large doses, and the drug in the second drug storage slot 122 will be slowly released over time. Example 4

[0041] On the basis of Example 2, this example provides a solution for applying a tubular medicine thread 100 to negative pressure drainage. The outer surface of the tubular medicine thread 100 has at least one fixing ring 130 protruding outward, and the fixing ring 130 serves as an auxiliary fixation for fixing the tubular medicine thread 100 in the sinus tract.

[0042] like Figure 5 , Figure 6As shown, one end of the tubular medicine thread 100 is inserted into the dressing groove 210 at the center of the dressing 200, and the depth of the dressing groove 210 is half the height of the dressing 200; the dressing groove 210 is circular in shape, and its size is equivalent to the outer diameter of the tubular medicine thread 100 after expansion. The shape of the dressing is a conventional rectangular shape, and the dressing 200 uses conventional negative pressure drainage dressings, such as polyvinyl alcohol sponge. Figure 7 As shown, the other side of the dressing 200 (the side where the tubular drug line 100 is not assembled) is placed with a biofilm 300, and the biofilm 300 is used to construct a negative pressure environment. After the dressing system is assembled, the tubular drug line 100 is placed in the sinus tract (its length is cut to be consistent with the depth of the sinus tract), and the dressing 200 is now tightly attached to the skin around the sinus tract, and finally the biofilm 300 is completely wrapped around the dressing 200. Of course, like the negative pressure drainage system, in this embodiment, a drainage tube is connected to the dressing 200, and the other end of the drainage tube is connected to a negative pressure source for use, which will not be repeated here. Example 5

[0043] On the basis of Example 4, a dressing cover 400 is added for convenient and quick assembly. Figure 8 , Fig. 9 As shown, the depth of the dressing cover 400 is equivalent to the sum of the thickness of the dressing 200 and the biofilm 300. The dressing cover 400 has a negative pressure connection port 410 in the center. The negative pressure connection port 410 is used for the drainage tube to pass through. Its diameter is equivalent to the outer diameter of the drainage tube (of course, a circle of silicone sealing ring can also be connected to the inner surface of the negative pressure connection port to achieve a sealing effect, which will not be repeated here). The drainage tube passes through the biofilm 300 and is fixed inside the dressing 200. The dressing cover 400 has a circle of extension sheet 420 around it. The extension sheet 420 is placed on the skin to play a role of sealing and fixing. Of course, in order to achieve its sealing and fixing effects, the lower surface of the extension sheet 420 has an adhesive sheet for sticking it on the skin and fixing it.

[0044] When in use, the biofilm 300 has a larger area than the dressing 200 and is sufficient to wrap the lower surface and the side surface of the dressing 200 . The dressing cover 400 buckles the dressing 200 and the biofilm 300 as a whole inside the dressing cover 400 .

[0045] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A self-expanding drug thread and a dressing system thereof, characterized in that: The main body of the medicine line is a solid or hollow cylindrical structure, the surface of the medicine line has a medicine storage component formed by an inward depression, the medicine line has a drainage channel, the medicine line is placed in the sinus, the medicine line is connected to the inside of the dressing, the dressing is placed on the skin around the sinus for use, and the surface of the dressing is covered with a biofilm.

2. A self-expanding cord and dressing system according to claim 1, characterized in that: The medicine line is a solid medicine line, and the outer surface of the solid medicine line has a plurality of medicine storage ball grooves, the medicine storage ball grooves are formed by the outer surface being concave inwards, and the medicine storage ball grooves are hollow ball-segment structures.

3. A self-expanding cord and dressing system thereof according to claim 2, characterized in that: The outer surface of the physical drug line has a plurality of drainage grooves, the drainage grooves are formed by the outer surface being recessed inwards, and the drainage grooves extend along the longitudinal direction of the physical drug line and pass through the upper and lower surfaces of the physical drug line.

4. A self-expanding cord and dressing system thereof according to claim 1, characterized in that: The medicine line is a tubular medicine line in the shape of a hollow cylinder, the side surface of the tubular medicine line has several through drainage holes, the inner surface or outer surface of the tubular medicine line has several medicine storage grooves, the openings of the medicine storage grooves are located on the inner surface or outer surface, and the medicine storage grooves extend along the longitudinal direction of the tubular medicine line.

5. A self-expanding cord and dressing system thereof according to claim 4, characterized in that: The medicine storage slots are a first medicine storage slot and a second medicine storage slot which are arranged at intervals, and the opening of the first medicine storage slot is larger than the opening of the second medicine storage slot.

6. A self-expanding cord and dressing system thereof according to claim 1, characterized in that: At least one fixing ring is protruded outwardly on the outer surface of the medicine line.

7. A self-expanding cord and dressing system thereof according to claim 1, characterized in that: The center of the dressing has a dressing groove formed by an inward depression, the depth of the dressing groove is half the thickness of the dressing, and the diameter of the dressing groove is equivalent to the outer diameter of the expanded medicine line.

8. A self-expanding cord and dressing system thereof according to claim 1, characterized in that: Also includes: A dressing cover, wherein the depth of the dressing cover is equivalent to the thickness of the dressing and the biofilm, and a negative pressure connection port is provided at the center of the dressing cover for passing a drainage tube.

9. A self-expanding cord and dressing system thereof according to claim 8, characterized in that: The dressing cover is surrounded by a circle of extension pieces, and the extension pieces are placed on the skin.

10. A self-expanding cord and dressing system thereof according to claim 9, characterized in that: An adhesive sheet is fixed on the lower surface of the extension sheet, which is used to seal and fix the dressing cover on the skin.

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