Hydrogel fixing patch cutter

Abstract

The utility model provides a hydrogel fixing patch cutter which is an auxiliary instrument matched with a hydrogel fixing patch for use and is used for solving the problem that the fixing patch cannot be automatically adjusted according to the size of a catheter. According to the hydrogel fixing patch cutter, a fixing patch is composed of a hydrogel main body, the hydrogel main body is completely or partially made of temperature-sensitive gel, a catheter hole which is formed by cutting of the fixing patch cutter and penetrates through the upper surface and the lower surface of the fixing patch is formed in the center of the hydrogel main body, and the catheter hole is used for containing and fixing a catheter. One side of the catheter hole is provided with a leading-in groove which is formed by cutting of the fixing paster cutter, extends outwards and penetrates through the upper surface and the lower surface of the fixing paster, and a catheter can penetrate through the leading-in groove.

Description

Technical Field

[0001] This utility model relates to the field of catheter fixation auxiliary device technology, specifically to a hydrogel fixation patch cutter. Background Technology

[0002] Catheter fixation dressings, as an important medical auxiliary product, play a crucial role in securing infusion catheters, drainage catheters, and other similar devices. Currently, commonly used catheter fixation dressings in clinical practice mainly include adhesive products such as transparent dressings, hydrocolloid dressings, and non-woven self-adhesive dressings. They generally have a three-layer structure, including a release layer, a backing layer, and an adhesive layer. During use, the release layer is removed, and the dressing is then applied to the location where the catheter needs to be secured. However, existing catheter fixation dressings have some problems in clinical application, such as easy lifting, blistering, and channel formation. This can cause the secured catheter to loosen, causing discomfort to the patient and increasing the workload of nursing staff. Furthermore, changing the dressing can easily strain the skin, leading to tension injuries, skin abrasions, and blistering. Poor adhesion can also cause the dressing to detach, and repositioning the catheter further increases patient discomfort. These problems, to some extent, affect the effectiveness of clinical treatment and the patient's recovery process. Utility Model Content

[0003] This invention provides a hydrogel fixation patch cutter, which is an auxiliary device used in conjunction with hydrogel fixation patches to solve the problem that fixation patches cannot be automatically adjusted according to the size of the catheter.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A hydrogel adhesive patch cutter is disclosed, wherein the adhesive patch is composed of a hydrogel body, which is wholly or partially thermosensitive gel. At the center of the hydrogel body is a conduit hole, formed by the adhesive patch cutter, penetrating the upper and lower surfaces of the adhesive patch for placing and fixing a conduit. On one side of the conduit hole is an outwardly extending guide groove, also formed by the adhesive patch cutter, penetrating the upper and lower surfaces of the adhesive patch for the passage of the conduit. The adhesive patch cutter consists of a guide groove cutter and a conduit hole cutter connected vertically; the guide groove cutter is used to cut and form the guide groove, and the conduit hole cutter is used to cut and form the conduit hole.

[0006] Furthermore, the cutting body of the inlet slot cutter is a hollow shell structure, consisting of a lower inverted trapezoidal part and a set of parallel upper cutting blades that protrude upwards from the middle of the upper surface of the inverted trapezoidal part. The front side of the inverted trapezoidal part has a front cutting blade that protrudes outwards.

[0007] Furthermore, the catheter hole cutter consists of a fixed foot and a cutting foot. The fixed foot is used to fix it on the hydrogel, and the cutting foot rotates along the center formed by the fixed foot to complete the cutting. The length corresponding to the angle between the cutting foot and the fixed foot is less than the radius of the catheter.

[0008] Furthermore, the back of the inverted trapezoidal portion is connected to the upper part of the connecting part via a connecting rod, and the fixing foot and the cutting foot are movably fixed to the lower part of the connecting part.

[0009] Furthermore, the guide groove formed by the cutter consists of an upper rectangular groove and a lower inverted trapezoidal groove, with the upper surface of the rectangular groove penetrating the upper surface of the hydrogel body and the lower surface of the inverted trapezoidal groove penetrating the lower surface of the hydrogel body.

[0010] Furthermore, the width of the rectangular groove is less than 1 cm; the diameter of the guide hole is 1-3 mm smaller than that of the guide.

[0011] Furthermore, the fixation patch is composed of hydrogel and several temperature-sensitive gel blocks evenly distributed on the lower surface of the hydrogel.

[0012] Furthermore, the fixing patch is stored, cut, and used in the fixing groove. The main body of the fixing groove is a shell structure with an opening at the top. The lower surface of the fixing groove has several inwardly recessed temperature-sensitive protrusion fixing grooves for fixing the temperature-sensitive gel block.

[0013] Furthermore, a scale is provided between the fixed foot and the cutting foot.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] (1) The cutter used with the cutting and fixing patch of this utility model can freely adjust the cutting of the catheter hole according to the diameter of the catheter to meet the needs of catheter fixing of different diameters. The cutting of the inlet groove can be quickly completed by the cutter on the other side of the inlet groove in conjunction with the fixing groove, forming an open path for the catheter to pass through, which is very beneficial to the promotion of clinical use.

[0016] (2) This utility model provides a fixation patch with hydrogel as the main body, and at least part of it uses thermosensitive gel. The advantage of thermosensitive gel is that it can undergo phase change at body temperature. After phase change, the viscosity increases significantly, reaching 8000 Pa·s. It can adhere well to the skin surface. When it needs to be removed, it is only necessary to raise or lower the temperature to adjust it to outside the phase change temperature range, so that it can be removed without scars or pain.

[0017] (3) This utility model provides a modified composite thermosensitive gel to solve the problem that the thermosensitive gel is liquid outside the phase change temperature and will precipitate some water at the phase change temperature. When it is combined with sodium alginate, sodium alginate will absorb the thermosensitive gel outside the phase change temperature and make it form as a whole. At the phase change temperature, the thermosensitive gel will gradually become viscous and precipitate, and the water produced can be stored in sodium alginate.

[0018] (4) The catheter fixing patch provided by this utility model has a catheter hole and an inlet groove. The inlet groove allows the catheter to pass through, and the size of the catheter hole is slightly smaller than the diameter of the catheter, which can strengthen and seal the catheter from above. The width of the inlet groove is also very narrow, which can allow the catheter to pass through and can also close easily when it moves inward to protect the wound around the catheter. Moreover, the inside of the inverted trapezoidal groove can be filled with absorbent cotton after the catheter is in place to absorb the exudate from the wound around the catheter.

[0019] (5) This utility model uses hydrogel as the main body, which is also a good drug carrier. It can carry antibacterial and anti-inflammatory drugs and avoid inflammation of the wound around the catheter.

[0020] (6) The fixing groove of this utility model can not only fix and store the fixing sticker, but also play an auxiliary role in use. Heating the fixing sticker before use can make it adhere well to the skin. The direct use method has the advantage of convenience, but it is necessary to wait 30-60 seconds for the temperature-sensitive gel to react and reach sufficient viscosity. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a temperature-sensitive catheter fixation patch according to Embodiment 1 of this utility model;

[0022] Figure 2 This is a schematic diagram of the cross-section of the inlet groove in a temperature-sensitive catheter fixing patch according to Embodiment 1 of this utility model;

[0023] Figure 3 This is a top view schematic diagram of a temperature-sensitive catheter fixation patch according to Embodiment 1 of this utility model;

[0024] Figure 4 This is a bottom view of a temperature-sensitive catheter fixation patch according to Embodiment 1 of this utility model;

[0025] Figure 5 This is a schematic diagram of the structure of a temperature-sensitive catheter fixing patch fixing groove according to Embodiment 2 of this utility model;

[0026] Figure 6 This is a phase transition temperature test diagram of the modified thermosensitive gel in Embodiment 3 of this utility model;

[0027] Figure 7This is a phase transition viscosity change diagram of the modified thermosensitive gel in Example 3 of this utility model;

[0028] Figure 8 This is a schematic diagram of the structure of a hydrogel fixing and cutting device according to Embodiment 5 of this utility model;

[0029] Figure 9 This is a schematic diagram of the inlet groove cutter in a hydrogel fixation tape cutter according to Embodiment 5 of this utility model.

[0030] Among them, 10-fixing sticker, 100-main body, 110-conduit hole, 120-inlet groove, 121-inverted trapezoidal groove, 122-rectangular groove, 130-thermal-sensitive protrusion, 20-fixing groove, 210-groove body, 220-thermal-sensitive protrusion fixing groove;

[0031] 1-Inlet groove cutter, 11-Cutting body, 12-Front cutting blade, 13-Upper cutting blade, 2-Guide hole cutter, 21-Fixing foot, 22-Cutting foot, 3-Connecting part, 31-Connecting rod. Detailed Implementation

[0032] The technical solution of this utility model will be clearly and completely described below through embodiments.

[0033] Patent CN116139330A discloses a method for fixing catheters using a liquid dressing. This method involves sequentially spraying a quick-drying adhesive and a film-forming liquid to fix the catheter. The quick-drying adhesive has a drying time of 60 seconds, and the film-forming liquid has a film-forming time of 70 seconds, totaling more than two minutes. This presents significant challenges in clinical use, as catheter movement or shaking during the process can lead to insecure fixation and gaps. Furthermore, the long time required for each catheter increases the burden on nursing staff. This utility model, however, is based on a one-piece, pre-formed dressing, achieving its purpose through material optimization. Example 1

[0034] Temperature-sensitive catheter fixation patch, such as Figure 1 As shown, the main body 100 of the fixing patch 10 is made of hydrogel or thermosensitive hydrogel. In this embodiment, the main body 100 is made of hydrogel. A circular conduit hole 110, penetrating the upper and lower surfaces of the main body 100, is cut at the center of the main body 100 for placing a conduit. The size of the conduit hole 110 is adjusted according to the diameter of the conduit to be placed, so that the two sizes match. In this embodiment, the diameter of the conduit hole 110 is slightly smaller than the diameter of the conduit (1-3 mm smaller), so that after the conduit is placed in the conduit hole 110, the conduit hole 110 can completely and tightly contact the outer surface of the conduit.

[0035] After cutting, a guide groove 120 is connected through the guide hole 100 in any direction. The guide groove 120 is used for the guide to pass through and reach the predetermined guide hole 110, such as... Figure 2 As shown, the inlet groove 120 is integrally formed by an upper rectangular groove 122 and a lower inverted trapezoidal groove 121. The inlet groove 120 penetrates the upper and lower surfaces of the main body 100, thus forming a channel for the catheter to enter the catheter hole 110 area. The lower part of the inlet groove 120 has an inverted trapezoidal cross-section, and its width is greater than the diameter of the catheter, which facilitates the movement of the catheter. The upper part is a rectangular groove 122 with a rectangular cross-section. The width of the rectangular groove 122 is less than 1 cm, preferably 0.3-0.5 mm. The advantage is that the hydrogel dressing is elastic, and the catheter can pass through the rectangular groove 122 and the inverted trapezoidal groove 121 when passing through the inlet groove 120. After the catheter reaches the catheter hole 110, the rectangular groove 122 also returns to its smaller width. When applying, actively bringing the rectangular groove 122 towards the center and then fixing it can close the gap above the rectangular groove 122. Figure 3 As shown.

[0036] like Figure 4 As shown, the back of the main body 100 has several evenly arranged temperature-sensitive protrusions 130. The temperature-sensitive protrusions 130 are made of temperature-sensitive hydrogel. The temperature-sensitive protrusions 130 become more adhesive within the body temperature range and can be firmly adhered to the skin. When heated or cooled to a certain temperature above or below, their adhesiveness decreases, and the fixation patch 10 can be easily removed. The hydrogel itself has a good skin feel as the main body of the fixation patch 10, and the hydrogel is a good carrier. Adding antibacterial and anti-inflammatory ingredients to it helps to maintain the stability and safety of the environment around the catheter. Example 2

[0037] In Example 1, the fixing patch 10 is cut to size according to the diameter of the conduit. Because the hydrogel material is easily deformed during cutting, resulting in an undesirable cut pattern, it needs to be used in conjunction with a fixing groove 20. The fixing groove 20 also serves as a carrier for storing the fixing patch 10. The main body of the fixing groove 20 is a groove body 210, which is a shell structure with an opening at the top. The fixing patch 10 is placed inside the groove body 210, and a sealing film is fixed to the top of the groove body 210. The sealing film is removed before cutting. Several downward-recessed temperature-sensitive raised fixing grooves 220 are formed on the bottom surface of the groove body 210. The temperature-sensitive raised pieces 130 are placed in the temperature-sensitive raised fixing grooves 220 for fixation. The advantage is that the temperature-sensitive raised pieces 130 also provide a fixing effect, making it less likely for the fixing patch 10 to shift during the cutting process.

[0038] If pure thermosensitive gel is used as the thermosensitive protrusion 130, the viscosity of the thermosensitive protrusion 130 made from the original thermosensitive gel is insufficient for shaping. Therefore, a thermosensitive protrusion fixing groove 220 is also needed. After cutting, the fixing groove 20 is placed in a constant temperature water bath (the phase transition temperature of the thermosensitive gel) for 30-60 seconds. At this time, the fixing patch 10 is taken out and pasted on the skin. The phase transition temperature is also the skin temperature, which can maintain sufficient adhesion. When it is necessary to remove it, heating or cooling can reduce the viscosity of the thermosensitive gel, achieving the purpose of removing it safely without leaving a trace. Of course, the above method can also be used for modified thermosensitive protrusions 130 that are sufficiently shaped. Example 3

[0039] This embodiment illustrates the preparation method of the thermosensitive hydrogel in Example 1. The thermosensitive hydrogel in this embodiment is a modified thermosensitive hydrogel, which also has a certain viscosity outside the phase transition temperature and can maintain the predetermined shape of the fixed patch 10.

[0040] S1: Add ammonium persulfate and distilled water to a container and stir to dissolve. Add N-isopropylacrylamide and N,N'-methylenebisacrylamide, heat to 65℃ and react for 30-60 minutes. Observe the solution becoming turbid during the process.

[0041] S2: Turn off the heating and cool to room temperature, add N-isopropylacrylamide, then add N,N,N',N'-tetramethylethylenediamine and sodium alginate, and continue the reaction for 2-4 hours;

[0042] S3: Pour out the upper reaction solution, wash the lower gel with distilled water 3-5 times, and vacuum dry to obtain the modified thermosensitive gel.

[0043] In step S1, the weight ratio of ammonium sulfate to N-isopropylacrylamide and N,N'-methylenebisacrylamide is 1:(40-50):2; in step S2, the weight ratio of N-isopropylacrylamide, N,N,N',N'-tetramethylethylenediamine and sodium alginate is (80-90):1:(115-125); and in step S3, the vacuum drying temperature is 25℃.

[0044] The thermosensitive hydrogel prepared by this invention has been formed because sodium alginate has good viscosity and liquid absorption capacity, so it can absorb and form PNIPAm below the phase transition temperature. Moreover, after heating, the liquid precipitated by PNIPAm can continue to maintain the absorption state, thereby keeping the surface of the fixation patch relatively dry.

[0045] like Figure 6 As shown, the phase transition temperature of the modified thermosensitive gel is 32.8℃. Figure 7As shown, the viscosity of the modified thermosensitive gel was increased from 26 Pa·s before the phase transition to 8000 Pa·s, which is sufficient to adhere firmly to the skin. The phase transition temperature can also be finely adjusted as needed to suit the skin temperature of different people. Example 4

[0046] The method for preparing the fixation patch 10 in Example 1, which consists of a hydrogel as the main body 100 and a thermosensitive hydrogel as the thermosensitive protrusion 130, has the advantage of reducing costs and making removal faster. Only heating or cooling a portion of the hydrogel is needed to achieve quick, painless, and scarless removal.

[0047] S11: Add 10g of acrylamide monomer, 0.05g of MBA crosslinking agent, and 0.05g of APS initiator to 100ml of deionized water and stir until homogeneous;

[0048] S12: Pour the mixed solution into the mold and place the mold in a constant temperature water bath at 60℃ for 2 hours to react;

[0049] S13: Cut the thermosensitive gel obtained in step S3 into small pieces, place them on the upper surface of the hydrogel in S12, and put the whole thing into a constant temperature water bath at 40°C for 0.5-1h. Example 5

[0050] The fixing sticker in the above embodiment needs to be used in conjunction with a cutter because the cutting needs to be carried out in the fixing groove. In order to improve the cutting efficiency, the cutter in this embodiment is provided.

[0051] The cutter consists of two parts, upper and lower, as follows: Figure 8 As shown, it consists of an inlet groove cutter 1 and a conduit hole cutter 2 connected vertically. The inlet groove cutter 1 is used to cut and form an inlet groove 120, and the conduit hole cutter 2 is used to cut and form a conduit hole 110.

[0052] like Figure 9 As shown, the main body of the guide groove cutter 1 is a hollow cutting body 11. The cross-sectional shape of the cutting body 11 is the same as that of the guide groove 120. It consists of an inverted trapezoidal part and a parallel upper cutting blade 13 protruding from the upper surface of the inverted trapezoidal part. A front cutting blade 12 protrudes outward from the front side of the inverted trapezoidal part. In use, according to... Figure 9 Insert it below the gel layer in the direction shown (the catheter hole 110 needs to be cut first), and cut outward from the catheter hole to form the inlet groove 120.

[0053] The rear side (back side of the front cutter) of the inlet groove cutter is connected to the upper part of the connecting part 3 via a connecting rod 31. A fixing foot 21 and a cutting foot 22 are movably fixed to the lower part of the connecting part 3. The fixing foot 21 and the cutting foot 22 are combined to form the conduit hole cutter 2, which is used to cut the hydrogel to form the conduit hole 110.

[0054] In use, fix the fixing foot 21 vertically on the hydrogel, adjust the cutting foot 22 to a suitable angle. The suitable angle is the angle calculated based on the catheter radius (slightly smaller than the catheter radius). Rotate the connecting part 3 to complete the cutting.

[0055] Of course, to make it easier to use the cutting foot 22 for cutting, a scale (not shown in the figure) can also be set on the cutting foot 22 and the fixing foot 21. The scale can be used to directly adjust to the predetermined size without having to calculate the angle or measure the angle.

[0056] The above embodiments are only some embodiments of the present utility model and are not intended to limit the present utility model in any form or substance. It should be noted that those skilled in the art can make several improvements and additions without departing from the concept of the present utility model, and these improvements and additions should also be considered within the protection scope of the present utility model.

Claims

1. A hydrogel adhesive tape cutter, characterized in that, The fixing patch is composed of a hydrogel body, which is wholly or partially thermosensitive gel. At the center of the hydrogel body is a conduit hole, formed by a fixing patch cutter, penetrating the upper and lower surfaces of the fixing patch, for placing and fixing a conduit. On one side of the conduit hole is an outwardly extending guide groove, also formed by a fixing patch cutter, penetrating the upper and lower surfaces of the fixing patch, for the passage of the conduit. The fixing patch cutter consists of a guide groove cutter and a conduit hole cutter connected vertically. The guide groove cutter is used to cut and form the guide groove, and the conduit hole cutter is used to cut and form the conduit hole.

2. The hydrogel fixation and cutting device according to claim 1, characterized in that, The cutting body of the inlet slot cutter is a hollow shell structure, consisting of a lower inverted trapezoidal part and a set of parallel upper cutting blades that bulge upwards from the middle of the upper surface of the inverted trapezoidal part. The front side of the inverted trapezoidal part has a front cutting blade that bulges outwards.

3. A hydrogel fixation and cutting device according to claim 2, characterized in that, The catheter hole cutter consists of a fixed foot and a cutting foot. The fixed foot is used to fix it on the hydrogel, and the cutting foot rotates along the center formed by the fixed foot to complete the cutting. The length corresponding to the angle between the cutting foot and the fixed foot is less than the radius of the catheter.

4. A hydrogel fixation and cutting device according to claim 3, characterized in that, The back of the inverted trapezoidal portion is connected to the top of the connecting part via a connecting rod, and the fixed foot and the cutting foot are movably fixed to the bottom of the connecting part.

5. A hydrogel fixation and cutting device according to claim 4, characterized in that, The inlet groove formed by the cutter consists of an upper rectangular groove and a lower inverted trapezoidal groove, with the upper surface of the rectangular groove penetrating the upper surface of the hydrogel body and the lower surface of the inverted trapezoidal groove penetrating the lower surface of the hydrogel body.

6. A hydrogel fixation and cutting device according to claim 5, characterized in that, The width of the rectangular groove is less than 1 cm; the diameter of the guide hole is 1-3 mm smaller than that of the guide.

7. A hydrogel fixation and cutting device according to claim 1, characterized in that, The fixation patch consists of hydrogel and several temperature-sensitive gel blocks evenly distributed on the lower surface of the hydrogel.

8. A hydrogel fixation and cutting device according to claim 7, characterized in that, The fixing patch is stored, cut, and used in the fixing groove. The main body of the fixing groove is a shell structure with an opening at the top. The lower surface of the fixing groove has several inwardly recessed temperature-sensitive protrusion fixing grooves for fixing the temperature-sensitive gel block.

9. A hydrogel fixation and cutting device according to claim 3, characterized in that, A scale is provided between the fixed foot and the cutting foot.

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