Plaster convenient for absorbing exudate at puncture position of indwelling catheter

Abstract

The patch comprises a positioning patch body, a liquid absorption patch body and a protection patch body which are sequentially pasted and fixed, the positioning patch body is of an annular structure with a liquid absorption cavity in the middle, a positioning protruding ring A is arranged on the top face of the positioning patch body, and an operation opening is formed in the middle of the liquid absorption patch body. A positioning convex ring B matched with the positioning convex ring A is arranged on the bottom surface of the liquid absorption patch and located on the outer side of the operation opening, a liquid absorption strip is arranged on the bottom surface of the liquid absorption patch and located between the positioning convex ring B and the operation opening, and when the liquid absorption patch and the positioning patch are pasted and fixed, the inner side wall of the positioning convex ring B is matched with the outer side wall of the positioning convex ring A, and the liquid absorption strip is located within the range defined by the positioning convex ring A; when the protection paste is pasted and fixed to the liquid absorption paste, the liquid absorption paste is located within the range of the bottom face of the protection paste, and the range of the liquid absorption cavity is larger than that of a body surface catheter fixator at a catheter puncture position. According to the structure, the application convenient for absorbing the seepage at the catheterization puncture position can effectively absorb the seepage at the catheterization puncture position and keep the skin of the body surface at the catheterization puncture position dry and comfortable.

Description

Technical Field

[0001] The present invention relates to the technical field of medical auxiliary instruments after surgical clinical wounds, and particularly relates to a dressing convenient for absorbing exudate at the puncture site of a catheter. Background Art

[0002] In clinical work, whether it is the wound of a patient after surgery or the puncture site after some catheterizations (such as PICC catheterization), there will be phenomena of bleeding and exudation. This often contaminates clothes or bed sheets and quilts. Moreover, the skin that is soaked in exudate for a long time is prone to dermatitis. Changing dressings multiple times a day not only increases the medical expenses of patients but also increases the risk of infection. For surgical wounds, since it is only one wound and there are no other utensils at the wound site, covering with a dressing can solve the problem. The traditional method is to use gauze dressings and foam dressings. After absorbing exudate in this way, the gauze dressing or foam dressing needs to be replaced in time. Otherwise, the dressing that has absorbed more exudate will also cause contamination of clothes or bed sheets and quilts, and the condition of the wound cannot be observed intuitively. Now there are also some transparent dressings. A transparent dressing is a transparent film. Although it can observe the wound, it cannot absorb exudate. For the puncture site after some catheterizations, there will also be bleeding and exudation. However, dealing with the bleeding and exudation at this puncture site is more troublesome. In addition to dealing with the same problems as the exudation and bleeding of the above-mentioned wounds, because there is also the body surface tube part of the catheter at the puncture site, due to the stimulation of the tube at the puncture site to the patient's puncture area, there will often be intermittent exudation or bleeding at the puncture site. In addition, it is also very difficult to fix the body surface tube part of the catheter without affecting the convenient use of the catheter. Moreover, because the existing dressings are directly pasted and fixed to the skin, every time the dressing is changed, the patient has to endure the pain when the dressing is peeled off the skin. And when the pasted dressing is separated from the skin, it will inevitably cause certain damage to the skin surface. In addition, the exudation and bleeding conditions of different patients are also different, and a dressing that can be applied to different exudation and bleeding conditions is needed. Summary of the Invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a dressing convenient for absorbing exudate at the puncture site of a catheter, which can effectively absorb the exudate of the wound or puncture opening and keep the body surface skin of the wound or puncture site dry.

[0004] The technical solution adopted by the present invention is: A dressing for facilitating the absorption of exudate at the puncture site of a catheter placement tube, comprising a positioning patch, an absorbent patch, and a protective patch that are sequentially pasted and fixed from bottom to top. The positioning patch is an annular structure with an absorbent cavity in the middle. On the top surface of the positioning patch, there is a positioning convex ring A along the inner edge. The positioning convex ring A extends downward along the inner edge of the positioning patch to the bottom surface of the positioning patch. There is an operation opening in the middle of the absorbent patch. On the bottom surface of the absorbent patch, outside the operation opening, there is a positioning convex ring B that matches the positioning convex ring A. On the bottom surface of the absorbent patch, between the positioning convex ring B and the operation opening, there is also an absorbent strip. When the absorbent patch is pasted and fixed to the positioning patch, the inner wall of the positioning convex ring B matches the outer wall of the positioning convex ring A, and the absorbent strip is within the range enclosed by the positioning convex ring A. When the protective patch is pasted and fixed to the absorbent patch, the absorbent patch is within the range of the bottom surface of the catheter placement tube. The range of the absorbent cavity is larger than the body surface catheter fixator at the puncture site of the catheter placement tube.

[0005] A further improvement of the present invention is that the bottom surface of the positioning patch is provided with an adhesive layer A, and on the top surface of the positioning patch, along the outer edge of the positioning convex ring A, there is an adhesive layer B. There is a spacing between the outer edge of the adhesive layer B and the corresponding side edge of the positioning patch.

[0006] A further improvement of the present invention is that the material of the positioning patch is foamed PU, and the positioning patch is evenly distributed with a plurality of air holes A that penetrate through the top and bottom. The adhesive layer A and the adhesive layer B are adhesive layers evenly distributed around the air holes A.

[0007] A further improvement of the present invention is that at the corresponding corners of the absorbent patch, the positioning convex ring B extends respectively to be provided with two parallel extending convex strips. The ends of the extending convex strips far from the positioning convex ring B respectively extend to the two adjacent side edges of the corner, and the bottom of the extending convex strips is flush with the bottom of the positioning convex ring B.

[0008] A further improvement of the present invention is that on the bottom surface of the absorbent patch, a plurality of strip-shaped through holes are respectively equidistantly arranged along the edge of the absorbent patch. The strip-shaped through holes are within the range enclosed by the extending convex strips and the positioning convex ring B at the two adjacent corners of the side edge where they are located.

[0009] A further improvement of the present invention is that the material of the absorbent patch is spunlace cloth, and the material of the absorbent strip is hydrocolloid or alginate gel.

[0010] A further improvement of the present invention is that the absorbent strip is an annular structure, and the range enclosed by the absorbent strip is larger than the body surface catheter fixator at the puncture site of the catheter placement tube.

[0011] A further improvement of the present invention is that the absorbent patch is evenly distributed with a plurality of air holes B that penetrate through the top and bottom.

[0012] A further improved solution of the present invention is that a plurality of air holes C penetrating the top and bottom are evenly distributed on the protective patch.

[0013] A further improved solution of the present invention is that gauze is filled through the operation port within the range surrounded by the liquid absorption strip.

[0014] The beneficial effects of the invention are as follows: First, the dressing for facilitating the absorption of exudate at the catheter puncture site of the present invention can effectively absorb the exudate at the catheter puncture site and keep the skin surface of the catheter puncture site dry.

[0015] Second, the dressing for facilitating the absorption of exudate at the catheter puncture site of the present invention can select whether to insert gauze according to different exudate conditions at the catheter puncture site, improving the applicability of the protective patch.

[0016] Third, the dressing for facilitating the absorption of exudate at the catheter puncture site of the present invention is divided into a positioning patch, a liquid absorption patch and a protective patch. When the exudate is relatively large and the dressing needs to be replaced, only the protective patch, the protective patch and the gauze, the protective patch and the liquid absorption patch, or the protective patch and the gauze and the liquid absorption patch need to be replaced. Moreover, neither the replacement of the protective patch nor the replacement of the liquid absorption patch is directly pasted and fixed to the patient's skin. Therefore, when replacing, the pain caused by the separation of the adhesive from the skin and the damage to the skin surface at the position fixed by the protective patch can be avoided, and the replacement cost is also reduced.

[0017] Fourth, the dressing for facilitating the absorption of exudate at the catheter puncture site of the present invention can timely observe the situation at the catheter puncture site, thus facilitating the decision of subsequent corresponding operations.

[0018] Fifth, the dressing for facilitating the absorption of exudate at the catheter puncture site of the present invention can accurately fix the liquid absorption strip around the catheter puncture site and accurately fix the liquid absorption patch on the surface of the positioning patch through the action of the positioning convex ring A and the positioning convex ring B.

[0019] Sixth, the dressing for facilitating the absorption of exudate at the catheter puncture site of the present invention, the positioning convex ring A extends downward along the inner edge of the positioning patch to the bottom of the positioning patch, thus playing a blocking role on the liquid absorption strip, avoiding the moisture of the liquid absorption strip from contacting the positioning patch and causing the positioning patch to be moist due to capillary action, thereby affecting the fixed effect of the positioning patch on the patient's skin.

[0020] Seventh, the dressing for facilitating the absorption of exudate at the catheter puncture site of the present invention, the end of the body surface tube part of the catheter at the puncture site is fixed by extending into the space between the protective patch and the liquid absorption patch through the area between the positions of two adjacent strip-shaped through holes. Thus, it is convenient for the end of the body surface tube part of the catheter at the puncture site to be inserted and fixed between the protective patch and the liquid absorption patch when not in use and taken out from between the protective patch and the liquid absorption patch when in use. In addition, it can also prevent the end of the body surface tube part of the catheter at the puncture site from being contaminated. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is the front sectional view schematic diagram when the present application is in use.

[0022] Figure 2 This is the front sectional view schematic diagram when the present application is used with a gauze inserted.

[0023] Figure 3 This is the top view schematic diagram when the present application is in use.

[0024] Figure 4 This is the bottom view schematic diagram when the present application is in use.

[0025] Figure 5 This is the front sectional view schematic diagram of the positioning sticker when not in use.

[0026] Figure 6 This is the front sectional view schematic diagram of the positioning sticker when in use.

[0027] Figure 7 This is the top partial sectional view schematic diagram of the positioning sticker when not in use.

[0028] Figure 8 This is the bottom partial sectional view schematic diagram of the positioning sticker when not in use.

[0029] Figure 9 This is the top view schematic diagram of the positioning sticker when in use.

[0030] Figure 10 This is the enlarged bottom view schematic diagram of a partial part of the positioning sticker.

[0031] Figure 11 This is the front sectional view schematic diagram of the liquid absorption sticker when not in use.

[0032] Figure 12 This is the front sectional view schematic diagram of the liquid absorption sticker after removing the protective film when not in use.

[0033] Figure 13 This is the top view schematic diagram of the liquid absorption sticker after removing the protective film when not in use.

[0034] Figure 14 This is the bottom view schematic diagram of the liquid absorption sticker after removing the protective film when not in use.

[0035] Figure 15 This is the front sectional view schematic diagram of the liquid absorption sticker when in use.

[0036] Figure 16 This is the top partial sectional view schematic diagram of the liquid absorption sticker when in use.

[0037] Figure 17 This is the bottom view schematic diagram of the liquid absorption sticker when in use.

[0038] Figure 18 It is an enlarged top view schematic diagram of a partial part of the liquid-absorbing patch.

[0039] Figure 19 It is a front view sectional schematic diagram of the protective patch when not in use.

[0040] Figure 20 It is a bottom view schematic diagram of the protective patch when not in use.

[0041] Figure 21 It is an enlarged top view schematic diagram of a partial part of the protective patch. Specific implementation manners

[0042] Combined Figures 1 to 21 As can be seen, the dressing for facilitating the absorption of exudate at the catheter puncture site includes a positioning patch 1, a liquid-absorbing patch 2, and a protective patch 3 that are sequentially pasted and fixed from bottom to top. The positioning patch 1 is an annular structure with a liquid-absorbing cavity 4 in the middle. On the top surface of the positioning patch 1, along the inner edge, there is a positioning convex ring A7, and the positioning convex ring A7 extends downward along the inner edge of the positioning patch 1 to the bottom surface of the positioning patch 1. In the middle of the liquid-absorbing patch 2, there is an operation opening 8. On the bottom surface of the liquid-absorbing patch 2, outside the operation opening 8, there is a positioning convex ring B10 that matches the positioning convex ring A7. On the bottom surface of the liquid-absorbing patch 2, between the positioning convex ring B10 and the operation opening 8, there is also a liquid-absorbing strip 9. When the liquid-absorbing patch 2 is pasted and fixed to the positioning patch 1, the inner wall of the positioning convex ring B10 matches the outer wall of the positioning convex ring A7, and the liquid-absorbing strip 9 is within the range surrounded by the positioning convex ring A7. When the protective patch 3 is pasted and fixed to the liquid-absorbing patch 2, the liquid-absorbing patch 2 is within the bottom surface range of the protective patch 3. The range of the liquid-absorbing cavity 4 is larger than the body surface catheter fixator at the catheter puncture site.

[0043] On the bottom surface of the positioning patch 1, there is an adhesive layer A5. On the top surface of the positioning patch 1, along the outer edge of the positioning convex ring A7, there is an adhesive layer B6, and there is a spacing between the outer edge of the adhesive layer B6 and the corresponding side edge of the positioning patch 1.

[0044] The material of the positioning patch 1 is foamed PU. The positioning patch 1 is evenly distributed with a plurality of air holes A14 that penetrate the top and bottom. The adhesive layer A5 and the adhesive layer B6 are adhesive layers evenly distributed around the air holes A14.

[0045] Each air hole 14 is respectively provided with an annular adhesive mark 15 with its own hole center as the center of the circle, and the adhesive marks 15 corresponding to adjacent air holes A14 intersect with each other to form an adhesive layer.

[0046] On the bottom surface and the top surface of the unused positioning patch 1, there are respectively a protective paper A18 and a transparent protective film 19, and the edges of the protective paper A18 and the transparent protective film 19 respectively match the corresponding edges of the positioning patch 1.

[0047] The corresponding positioning convex ring B10 is respectively provided with two parallel extending convex strips 12 at the vertex angles of the liquid absorption patch 2. The ends of the extending convex strips 12 far from the positioning convex ring B10 respectively extend to the adjacent side edges of the vertex angle, and the bottoms of the extending convex strips 12 are flush with the bottom of the positioning convex ring B10.

[0048] On the bottom surface of the liquid absorption patch 2, a plurality of strip-shaped through holes 11 are respectively arranged at equal intervals along the edge of the liquid absorption patch 2. The strip-shaped through holes 11 are located within the range surrounded by the extending convex strips 12 and the positioning convex ring B10 at the two adjacent vertex angles of the side edge where they are located.

[0049] The length direction of the strip-shaped through holes 11 is parallel to the side edge where they are located.

[0050] The positioning convex ring A7, the positioning convex ring B10, and the extending convex strips 12 are all made of silica gel.

[0051] The liquid absorption patch 2 is made of spunlace cloth, and the liquid absorption strip 9 is made of hydrocolloid or alginate gel.

[0052] The liquid absorption strip 9 is in a ring structure, and the range surrounded by the liquid absorption strip 9 is larger than the body surface catheter fixator at the catheterization puncture site.

[0053] On the bottom surface and the top surface of the unused liquid absorption patch 2, a protective paper B20 and a protective paper C21 are respectively provided. The edges of the protective paper B20 and the protective paper C21 respectively match the corresponding edges of the liquid absorption patch 2.

[0054] The liquid absorption patch 2 is evenly distributed with a plurality of air-permeable holes B16 penetrating through the top and the bottom.

[0055] The protective patch 3 is evenly distributed with a plurality of air-permeable holes C17 penetrating through the top and the bottom.

[0056] The aperture of the air-permeable hole C17 is smaller than the aperture of the air-permeable hole B16, the aperture of the air-permeable hole B16 is smaller than the aperture of the air-permeable hole A14, and the distribution density of the air-permeable hole C17 is greater than the distribution density of the air-permeable hole B16, and the distribution density of the air-permeable hole B16 is greater than the distribution density of the air-permeable hole A14.

[0057] The protective patch 3 is made of flexible polyurethane transparent film.

[0058] On the bottom surface of the unused protective patch 3, a protective paper D22 is provided. The edges of the protective paper D22 respectively match the corresponding edges of the protective patch 3.

[0059] Within the range surrounded by the liquid absorption strip 9, gauze 13 is filled through the operation port 8.

[0060] Such as Figures 1 to 21It can be known that when the present application is used, after the catheterization puncture is completed, first fix the catheter on the body surface at the puncture site through the body surface catheter fixator and straighten the catheter on the body surface. Then, tear off the protective paper A18 of the positioning patch 1, and then paste and fix the positioning patch 1 on the body surface skin around the catheterization puncture site through the adhesive layer A5. Observe through the transparent protective film 19 to make the catheterization puncture site located at the central position within the liquid absorption cavity 4 of the positioning patch 1, and fix one end of the catheter on the body surface close to the body surface catheter fixator to the body surface skin through one side of the positioning patch 1, and the free end of the catheter on the body surface is located outside the positioning patch 1. Then, tear off the transparent protective film 19, and then tear off the protective paper B20 of the liquid absorption patch 2. Then, after positioning through the positioning convex ring B10 at the bottom of the liquid absorption patch 2 and the positioning convex ring A7 of the positioning patch 1, paste and fix each side edge of the liquid absorption patch 2 to the adhesive layer B6 on the top surface of the positioning patch 1 through the area enclosed between the positioning convex ring B10 and the corresponding extension strips 12 at both ends of the edge, so that the liquid absorption strip 9 is located within the liquid absorption cavity 4 and around the catheterization puncture site. Press the edge of the liquid absorption patch 2 to make the part of the adhesive layer B6 of the positioning patch 1 corresponding to the position of the strip-shaped through hole 11 of the liquid absorption patch 2 protrude upward through the strip-shaped through hole 11. Then, tear off the protective paper C21. At this time, the operation port 8 is located directly above the catheterization puncture site. If there is a large amount of exudate and frequent exudate at the catheterization puncture site, it is necessary to stuff multiple layers of gauze 13 into the range surrounded by the liquid absorption strip 9 through the operation port 8, so that the gauze 13 can fill the space within the range surrounded by the liquid absorption strip 9 between the liquid absorption patch 2 and the body surface skin corresponding to the position of the body surface catheter fixator. After the gauze 13 is filled or if the exudate at the catheterization puncture site is relatively less, bend the catheter on the body surface and place the free end of the catheter on the body surface in the area between two adjacent strip-shaped through holes 11 above the corresponding liquid absorption patch 2 that fixes the catheter on the body surface. Then, tear off the protective paper D22, and paste and fix the edges of the protective patch 3 to the adhesive layer B6 on the top surface of the positioning patch 1 extending from the strip-shaped through holes 11 of the liquid absorption patch 2 respectively, so that the edge of the protective patch 3 is fixed to the edge of the liquid absorption patch 2. At the same time, the free end of the catheter on the body surface is also fixed between the protective patch 3 and the liquid absorption patch 2. Moreover, the protective patch 3 can also protect the top surface of the liquid absorption patch 2 and the operation port 8. At the same time, since the material of the protective patch 3 is a flexible polyurethane transparent film, it can not only have sufficient flexible tension so that the area of the protective patch 3 corresponding to the range surrounded by the strip-shaped through holes 11 can fit with the liquid absorption patch 2, thereby making the overall protective patch have a certain compressive force on the catheterization puncture site, but also observe the situation of the catheterization puncture site or observe the situation of the gauze 13 or the liquid absorption strip 9 through the operation port 8.

[0061] Since the material of the liquid absorbent strip 9 is hydrocolloid or alginate gel, the hydrocolloid or alginate gel has the function of absorbing exudate, and can absorb the exudate at the catheter puncture site in time, and has self-adhesiveness, can fit the skin around the catheter puncture site well, and prevent the exudate from continuing to seep out. After the liquid absorbent strip 9 absorbs enough exudate, the hydrocolloid or alginate gel will be saturated with water, resulting in the liquid absorbent strip 9 being unable to continue to absorb the exudate. In addition, the surface of the hydrocolloid or alginate gel is a layer of semi-permeable polymer membrane structure, and the semi-permeable polymer membrane structure on the surface can allow oxygen and water vapor to exchange, but has a barrier property against external granular foreign matter such as dust and bacteria. Since the material of the liquid absorbent patch 2 fixed with the liquid absorbent strip 9 is spunlace cloth (a non-woven fabric), and the air permeability B16 is evenly distributed, the liquid absorbent patch 2 can volatilize the water in the liquid absorbent strip 9 into the air through capillary action, so that the liquid absorbent strip 9 can continue to absorb the exudate at the catheter puncture site, thereby extending the service life of the liquid absorbent strip 9.

[0062] If the amount of exudate at the catheter puncture site is large and the exudate is frequent, the capillary action of the absorbent patch 2 alone will cause the absorbent patch 2 to not have time to evaporate water to the outside, which will cause the absorbent patch 2 to be in a wet state for a long time, which will cause the fixation effect between the absorbent patch 2 and the positioning patch 1 and the protective patch 3 and the positioning patch 1 to deteriorate, and the strength of the absorbent patch 2 itself is also reduced, which also affects the patient's life, so this leads to the need for frequent replacement of the absorbent patch 2. Therefore, at this time, it is necessary to insert the gauze 13 through the operating port 8 so that the gauze 13 can play a more effective capillary role on the absorbent strip 9, and if the gauze 13 is inserted enough and contacts the skin around the catheter puncture site, the gauze 13 can even directly absorb the exudate; in addition, the gauze 13 can also play a certain buffering and protective role on the surface catheter fixer.

[0063] The protective patch 3 can block the surface of the liquid absorbent patch 2. Through the air holes C17 of the protective patch 3, the liquid absorbent patch 2 can still be effectively ventilated with the outside air, and it is also convenient for the liquid absorbent patch 2 to evaporate water vapor to the outside.

[0064] When the gauze 13 needs to be inserted or the gauze 13 needs to be removed after being soaked by liquid, the protective patch 3 only needs to be torn open to expose the operation port 8, and then the gauze 13 is inserted into the operation port 8 from the operation port 8 or the gauze 13 in the operation port 8 is taken out respectively, and the protective patch 3 is fixed to the liquid absorbent patch 2 again after the operation is completed. When the protective patch 3 is torn open, since the strip-shaped through holes 11 are arranged at equal intervals on each side edge of the liquid absorbent patch 2, the protective patch 3 can be quickly separated from the liquid absorbent patch 2 by only pulling up the portion between two adjacent strip-shaped through holes 11 on the edge of the protective patch 3 corresponding to any side edge of the liquid absorbent patch 2.

[0065] When the surface of the liquid absorption patch 2 becomes wet or when the liquid absorption strip 9 reaches the replacement period, it is necessary to replace the liquid absorption patch 2; when tearing off the liquid absorption patch 2, by pulling upward at the position between two adjacent extended ridges 12 at the top corner of the liquid absorption patch 2, due to the action of the extended ridges 12, a cavity is formed at the corresponding position between the top corner of the liquid absorption patch 2 and the positioning patch 1, which is convenient for tearing the liquid absorption patch 2 from the positioning patch 1.

[0066] The structure of the glue mark 15 of the positioning patch 1 can not only ensure that the positioning patch 1 has sufficient sticking and fixing effect, but also does not affect the air permeability of the positioning patch 1, thus improving the comfort of the skin contacted by the positioning patch 1.

Claims

1. A dressing for facilitating the absorption of exudate at the puncture site of a catheter insertion, characterized in that: It includes a positioning sticker (1), a liquid-absorbing sticker (2) and a protective sticker (3) which are pasted and fixed in sequence from bottom to top. The positioning sticker (1) is an annular structure with a liquid-absorbing cavity (4) in the middle. On the top surface of the positioning sticker (1), along the inner edge, there is a positioning convex ring A (7), and the positioning convex ring A (7) extends downward along the inner edge of the positioning sticker (1) to the bottom surface of the positioning sticker (1). In the middle of the liquid-absorbing sticker (2), there is an operation opening (8). On the bottom surface of the liquid-absorbing sticker (2), outside the operation opening (8), there is a positioning convex ring B (10) that matches the positioning convex ring A (7). On the bottom surface of the liquid-absorbing sticker (2), between the positioning convex ring B (10) and the operation opening (8), there is also a liquid-absorbing strip (9). When the liquid-absorbing sticker (2) is pasted and fixed to the positioning sticker (1), the inner wall of the positioning convex ring B (10) matches the outer wall of the positioning convex ring A (7), and the liquid-absorbing strip (9) is within the range enclosed by the positioning convex ring A (7). When the protective sticker (3) is pasted and fixed to the liquid-absorbing sticker (2), the liquid-absorbing sticker (2) is within the range of the bottom surface of the protective sticker (3). The range of the liquid-absorbing cavity (4) is larger than the body surface catheter fixator at the catheterization puncture site.

2. The dressing for facilitating the absorption of exudate at the puncture site of the indwelling tube according to claim 1, wherein: On the bottom surface of the positioning sticker (1), there is a paste layer A (5). On the top surface of the positioning sticker (1), along the outer edge of the positioning convex ring A (7), there is a paste layer B (6), and there is a spacing between the outer edge of the paste layer B (6) and the corresponding side edge of the positioning sticker (1).

3. The dressing for facilitating the absorption of exudate at the puncture site of the indwelling catheter according to claim 2, wherein: The positioning sticker (1) is made of foamed PU, and the positioning sticker (1) is evenly distributed with a plurality of air-permeable holes A (14) that penetrate the top and bottom. The paste layer A (5) and the paste layer B (6) are glue layers evenly distributed around the air-permeable holes A (14).

4. The dressing for facilitating the absorption of exudate at the puncture site of the indwelling catheter according to claim 1, wherein: At the corresponding corners of the liquid-absorbing sticker (2), the positioning convex ring B (10) extends respectively with two parallel extension convex strips (12). The ends of the extension convex strips (12) far from the positioning convex ring B (10) extend to the two adjacent side edges of the corner respectively, and the bottom of the extension convex strips (12) is flush with the bottom of the positioning convex ring B (10).

5. The dressing for facilitating the absorption of exudate at the puncture site of the indwelling catheter according to claim 4, characterized in that: On the bottom surface of the liquid-absorbing sticker (2), along the edge of the liquid-absorbing sticker (2), a plurality of strip-shaped through holes (11) are arranged at equal intervals respectively. The strip-shaped through holes (11) are within the range enclosed by the extension convex strips (12) and the positioning convex ring B (10) at the two adjacent corners of the side edge where they are located.

6. The dressing for facilitating the absorption of exudate at the puncture site of the indwelling tube according to claim 1, wherein: The liquid-absorbing sticker (2) is made of spunlace cloth, and the liquid-absorbing strip (9) is made of hydrocolloid or alginate gel.

7. The dressing for facilitating the absorption of exudate at the puncture site of the indwelling catheter according to claim 1, wherein: The liquid-absorbing strip (9) is an annular structure, and the range enclosed by the liquid-absorbing strip (9) is larger than the body surface catheter fixator at the catheterization puncture site.

8. The dressing for facilitating the absorption of exudate at the puncture site of the indwelling tube according to claim 1, characterized in that: The liquid-absorbing sticker (2) is evenly distributed with a plurality of air-permeable holes B (16) that penetrate the top and bottom.

9. The dressing for facilitating the absorption of exudate at the puncture site of the indwelling catheter according to claim 1, wherein: The protective sticker (3) is evenly distributed with a plurality of air-permeable holes C (17) that penetrate the top and bottom.

10. The dressing for facilitating the absorption of exudate at the puncture site of the indwelling tube according to claim 1, wherein: Within the range enclosed by the liquid-absorbing strip (9), a gauze (13) is filled through the operation opening (8).

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