An externally applied patch

Abstract

The present application provides an external application patch and a method for using the same, which relates to the technical field of medical consumables. The patch includes a patch body that adheres to the skin. The patch body includes a waterproof film and a drug release layer fixed in the middle of the inner side of the waterproof film. The drug release layer is made of medical absorbent cotton; a central gradient cotton sheet is fixed in the middle of the inner side of the drug release layer, and the density of the central gradient cotton sheet gradually decreases from its center to the outside; an infusion channel is disposed through the middle of the drug release layer, and the outlet end of the infusion channel is aligned with the middle of the central gradient cotton sheet. The present application saves manpower while improving the effect of disinfecting or applying medicine to the patient's wound.

Description

Technical Field

[0001] This application relates to the technical field of medical consumables, and particularly to an external application patch and its usage method. Background Art

[0002] In medical care, many patients need to be treated by applying drugs externally. However, traditional methods often have problems such as uneven drug release, difficulty in controlling the release time, poor efficacy due to easy volatilization of the drug, and lack of an effective reminder mechanism. In addition, the fixation of external application gauze often requires additional steps and tools, which affects the nursing efficiency and patient experience. Summary of the Invention

[0003] In order to improve the problem that the uneven drug release during external drug application affects the nursing efficiency, this application provides an external application patch and its usage method.

[0004] In a first aspect, an external application patch provided by this application adopts the following technical solution:

[0005] An external application patch includes

[0006] a patch body, which is adhered to the skin. The patch body includes a waterproof film and a drug release layer fixed in the middle of the inner side of the waterproof film. The drug release layer is made of medical absorbent cotton;

[0007] a central gradient cotton sheet, which is fixed in the middle of the inner side of the drug release layer, and the density of the central gradient cotton sheet gradually decreases from its center to the outside;

[0008] an infusion channel, which is arranged through the middle of the drug release layer, and the outlet end of the infusion channel is aligned with the middle of the central gradient cotton sheet.

[0009] Furthermore, a card slot plate is fixed in the middle of the inner side of the waterproof film, the drug release layer is embedded and installed on the side of the card slot plate away from the waterproof film, and the infusion channel is sequentially arranged through the middle of the card slot plate and the drug release layer.

[0010] Furthermore, an electronic timer is detachably installed on the outer side of the waterproof film.

[0011] Furthermore, a non-woven fabric layer is arranged around the card slot plate on the inner side of the waterproof film.

[0012] Furthermore, strong patches are arranged on the four sides of the waterproof film.

[0013] Furthermore, pressure bands are arranged on the four sides of the waterproof film, and the strong patches are located on the pressure bands.

[0014] Furthermore, a tube fixing clip is provided inside the waterproof film. One end of the tube fixing bracket points to the slot board and communicates with the slot board, and the other end extends to the edge of the waterproof film.

[0015] Furthermore, a liquid storage bladder is provided between the slot board and the waterproof film. The liquid outlet of the liquid storage bladder is aligned with the infusion channel. By squeezing the liquid storage bladder, the liquid outlet of the liquid storage bladder is squeezed open, and the liquid stored in the liquid storage bladder can be squeezed into the infusion channel.

[0016] In a second aspect, a method for using an external application patch provided by the present application, based on the above-mentioned external application patch, includes the following steps:

[0017] S1. Fix the patch body, and use the waterproof film to seal and cover the drug release layer and the central gradient cotton sheet at the patient's wound.

[0018] S2. Inject liquid medicine. Pierce the waterproof film with a syringe containing liquid medicine and insert it into the infusion channel. Then, squeeze the liquid medicine in the syringe into the middle of the drug release layer through the infusion channel. The liquid medicine in the middle of the drug release layer not only gradually penetrates the central gradient cotton sheet along the thickness direction of the central gradient cotton sheet, but also gradually penetrates from the center of the central gradient cotton sheet to the surrounding. Since the density of the central gradient cotton sheet gradually decreases from its center to the outside, the humidity at each part on the side of the central gradient cotton sheet close to the patient's wound is similar, so that the central gradient cotton sheet can evenly release the liquid medicine to the patient's wound.

[0019] S3. Timing and monitoring. When the injection of liquid medicine is completed, start the electronic timer for timing and monitoring. When the preset time is reached, the electronic timer starts an alarm to remind the patient or medical staff to replace or process the patch.

[0020] In a third aspect, a method for using an external application patch provided by the present application, based on the above-mentioned external application patch, includes the following steps:

[0021] S1. Fix the patch body, and use the waterproof film to seal and cover the drug release layer and the central gradient cotton sheet at the patient's wound. At this time, the liquid storage bladder storing liquid medicine is also firmly fixed at the patient's wound.

[0022] S2, injecting liquid medicine, squeezing the liquid storage capsule, so that the liquid outlet of the liquid storage capsule is squeezed open, and the liquid medicine stored in the liquid storage capsule can be squeezed into the infusion channel, and then the liquid medicine reaches the middle of the drug release layer. The liquid medicine in the middle of the drug release layer not only gradually penetrates the central gradient cotton sheet along the thickness direction of the central gradient cotton sheet, but also gradually penetrates from the center of the central gradient cotton sheet to the surrounding areas. Since the density of the central gradient cotton sheet gradually decreases from the center to the outside, the humidity of each part of the central gradient cotton sheet close to the patient's wound is similar, so that the central gradient cotton sheet can evenly release the liquid medicine to the patient's wound;

[0023] S3, timing monitoring, when the liquid drug injection is completed, start the electronic timer for timing monitoring. When the preset time is reached, the electronic timer starts the alarm to remind the patient or medical staff to change or handle the dressing.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] 1. The present invention integrates multiple functions such as disinfectant or liquid drug release, gradient disinfection or dressing, wound protection and pipeline fixation, which greatly simplifies the nursing process of patients with tubes, reduces the manpower output in the nursing process, and improves the nursing efficiency;

[0026] 2. The design of the central gradient cotton pad ensures precise control of the disinfection or dressing range and uniform release, which improves the effect of disinfection or dressing. At the same time, the design of the card slot plate ensures the airtightness of the disinfectant or liquid medicine, avoids the volatilization of the disinfectant or liquid medicine, and further consolidates the effect of disinfection or dressing;

[0027] 3. By setting an electronic timer, excessive drug release or failure to replace the dressing in time can be avoided, thus improving the scientificity and safety of the treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 It is a schematic diagram of the overall front view structure in the embodiment of the present application.

[0030] Figure 2 It is a schematic diagram of the overall rear view structure in the embodiment of the present application.

[0031] Figure 3 It is a schematic diagram of the overall explosion structure in the embodiment of the present application.

[0032] Reference numerals: 1, waterproof film; 2, non-woven fabric layer; 3, pressure band; 4, strong patch; 5, card slot plate; 6, infusion channel; 7, drainage tube; 8, drug release layer; 9, central gradient cotton sheet; 10, tube fixing clip; 11, liquid storage sac; 12, electronic timer. Detailed implementation manners

[0033] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings in the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0034] The application embodiment discloses an external application patch and its using method. Referring to Figure 1 、 Figure 2 and Figure 3 , an external application patch includes a patch body and a central gradient cotton sheet 9. The patch body includes a waterproof film 1 and a drug release layer 8. The waterproof film 1 is made of a transparent medical-grade polyurethane or polyvinyl chloride material, has good air permeability and skin compatibility, and also has good adhesiveness and waterproofness. The size of the waterproof film 1 is 15 cm x 15 cm. The drug release layer 8 is fixed in the middle of the inner side of the waterproof film 1, and the drug release layer 8 is made of highly absorbent and hypoallergenic medical absorbent cotton, and its size is 10 cm x 10 cm. The center of the drug release layer 8 coincides with the center of the waterproof film 1. The central gradient cotton sheet 9 is press-fitted and fixed in the middle of the inner side of the drug release layer 8, and its size is 8 cm x 8 cm. The center of the central gradient cotton sheet 9 coincides with the center of the drug release layer 8. The central gradient cotton sheet 9 is formed by laminating and pressing together multiple cotton sheets with different sizes, so that the thickness of the central gradient cotton sheet 9 gradually decreases from its center to the periphery, and thus the density of the central gradient cotton sheet 9 gradually decreases from its center to the outside.

[0035] In order to stably fix the drug release layer 8 with the central gradient cotton sheet 9 on the inner side of the waterproof film 1, referring to Figure 1 、 Figure 2 and Figure 3A slot plate 5 is provided between the waterproof film 1 and the drug release layer 8. The outer side of the slot plate 5 is flat and stably bonded to the waterproof film 1, and the inner side is provided with a groove for embedding and installing the drug release layer 8. In order to improve the comfort of wearing the patch, the slot plate 5 is made of medical-grade PVC material with high transparency and high flexibility. The slot plate 5 and the drug release layer 8 are both provided with an infusion channel 6 at the center. The slot plate 5 is provided with a drainage tube 7 in the infusion channel 6. The drainage tube 7 is provided in a funnel shape at one end close to the waterproof film 1, and the other end points to and abuts against the center of the central gradient cotton sheet 9.

[0036] In a feasible embodiment, when a patch is needed to disinfect or apply medicine to the patient's wound, the drainage tube 7 can be quickly found through the transparent waterproof film 1, the syringe can be pierced through the waterproof film 1 and inserted into the drainage tube 7, and then the disinfectant or liquid medicine in the syringe can be squeezed out, so that the solution quickly reaches the middle of the drug release layer 8 under the drainage effect of the drainage tube 7. The liquid medicine in the middle of the drug release layer 8 not only gradually penetrates the central gradient cotton sheet 9 along the thickness direction of the central gradient cotton sheet 9, but also gradually penetrates from the center of the central gradient cotton sheet 9 to the surroundings. Although the liquid medicine content at the center of the central gradient cotton sheet 9 is high and the liquid medicine content around it is low, because the density of the central gradient cotton sheet 9 gradually decreases from its center to the outside, after a certain period of time, the humidity of each part of the central gradient cotton sheet 9 close to the patient's wound is similar, ensuring that the central gradient cotton sheet 9 can evenly release the liquid medicine to the patient's wound. Through the transparent waterproof film 1 and the transparent card slot plate 5, the infiltration of the liquid drug on the drug release layer 8 can be quickly checked. When the drug release layer 8 is completely infiltrated, it can be indicated that the current central gradient cotton sheet 9 has been completely infiltrated, and the liquid drug has been released to the patient's wound more evenly. In addition, the card slot plate 5 can also prevent the liquid drug from overflowing to the outside of the card slot plate 5, ensuring that the waterproof film 1 can be stably attached to the patient's skin.

[0037] In another possible embodiment, referring to Figure 1 , Figure 2 and Figure 3, a liquid storage bag 11 is stably placed between the waterproof film 1 and the card slot plate 5. The liquid storage bag 11 is made of medical silicone or polyurethane material, and a liquid medicine for disinfection or dressing is stored in the liquid storage bag 11. One end of the liquid storage bag 11 is set as the liquid outlet, and the rest is integrally formed. The liquid storage bag 11 is located on one side of the drainage tube 7, and the liquid outlet of the liquid storage bag 11 is aligned with the drainage tube 7. The liquid outlet of the liquid storage bag 11 is hot melt pressed and can only be squeezed open when being squeezed. When the content of the disinfectant or liquid medicine required by the patient is small, the disinfectant or liquid medicine can be injected into the liquid storage bag 11 in advance, and the liquid storage bag 11 is fixed on the outer side of the card slot plate 5 through the waterproof film 1. When it is necessary to disinfect or dress the patient's wound, since the waterproof film 1 has a certain ductility, the liquid storage bag 11 can be squeezed on the outer side of the waterproof film 1, so that the internal pressure of the liquid storage bag 11 increases, prompting the liquid outlet of the liquid storage bag 11 to be opened, and the liquid medicine stored in the liquid storage bag 11 can be squeezed into the drainage tube 7, and then the liquid medicine reaches the middle of the drug release layer 8. The liquid medicine in the middle of the drug release layer 8 not only gradually penetrates the central gradient cotton sheet 9 along the thickness direction of the central gradient cotton sheet 9, but also gradually penetrates from the center of the central gradient cotton sheet 9 to the surrounding. Although the content of the liquid medicine at the center of the central gradient cotton sheet 9 is high and the content of the liquid medicine around is low, due to the density of the central gradient cotton sheet 9 gradually decreasing from its center to the outside, after a certain time, the humidity at each part on the side of the central gradient cotton sheet 9 close to the patient's wound is similar, ensuring that the central gradient cotton sheet 9 can evenly release the liquid medicine to the patient's wound. Through the transparent waterproof film 1 and the transparent card slot plate 5, the infiltration situation of the liquid medicine on the drug release layer 8 can be quickly checked. When the drug release layer 8 is completely infiltrated, it can indicate that the current central gradient cotton sheet 9 has been completely infiltrated, and the liquid medicine has been more evenly released to the patient's wound. In addition, the card slot plate 5 can also prevent the liquid medicine from overflowing to the outside of the card slot plate 5, ensuring that the waterproof film 1 can be stably attached to the patient's skin.

[0038] In still another embodiment, the above two embodiments can be combined, that is, when the liquid medicine in the liquid storage bag 11 is used up, if it is still necessary to continue to supplement the medicine to the patient's wound, a syringe can be used to pierce the waterproof film 1, and the liquid medicine is continuously injected into the drug release layer 8 and the central gradient cotton sheet 9 through the drainage tube 7, so that the patient's wound can be evenly disinfected or medicated.

[0039] Although the situation of disinfecting or dressing the patient's wound can be quickly checked through the transparent waterproof film 1 and the transparent card slot plate 5, to further ensure that the patient's wound can be treated in time, refer to Figure 1, an electronic timer 12 is detachably installed outside the waterproof film 1. The electronic timer 12 is temporarily fixed outside the waterproof film 1 through a medical tape. After the liquid medicine is injected, the electronic timer 12 is started for timing monitoring. When the preset time is reached, the electronic timer 12 starts an alarm to remind the patient or medical staff to replace or process the dressing.

[0040] Considering that the waterproof film 1 needs to be stably attached to the patient's skin to ensure effective treatment of the patient's wound, with reference to Figure 1 , Figure 2 and Figure 3 , a non-woven fabric layer 2 is adhered to the inner side wall of the waterproof film 1. The non-woven fabric layer 2 is arranged in a zigzag shape. The slot board 5 is embedded in the zigzag non-woven fabric layer 2 and is stably connected to the non-woven fabric layer 2, further improving the stability of the installation of the slot board 5 on the waterproof film 1. Pressing belts 3 extend from all around the non-woven fabric layer 2. One end of the pressing belt 3 is fixedly connected to the side wall of the slot board 5 and the other end extends outside the waterproof film 1, and the pressing belt 3 is stably adhered to the non-woven fabric layer 2. The pressing belt 3 is made of an elastic bandage material and has a certain ductility. A strong dressing 4 is adhered to the inner side wall of the end of the pressing belt 3 far from the slot board 5. When the pressing belt 3 is tightened and fixedly adhered to the patient's skin through the strong dressing 4, it can provide sufficient pressure to make the dressing fit more closely to the patient's skin, preventing the leakage of the solution and the entry of air.

[0041] In medical care, drainage tubes and other tubes are inserted at the wounds of some patients. When disinfecting or applying medicine to the wounds with inserted tubes by applying an external dressing, to avoid the existence of the tubes affecting the stability and sealing of the dressing's adhesion to the patient's skin, with reference to Figure 1 , Figure 2 and Figure 3 , a tube fixing clip 10 is arranged inside the waterproof film 1. The tube fixing clip 10 is made of a soft and elastic medical-grade silicone or polyurethane material. An embedding groove for accommodating and fixing the tube fixing clip 10 is opened on the slot board 5. A receiving groove for accommodating the tube is opened on the side of the tube fixing clip 10 far from the waterproof film 1. The receiving groove on the tube fixing clip 10 communicates with the groove inside the slot board 5, so that when the dressing is attached to the patient's skin, the tube at the patient's wound can be properly fixed in the receiving groove of the tube fixing clip 10, avoiding the influence of the random swing of the tube on the adhesion effect of the dressing to the patient's skin.

[0042] A method for using an external dressing provided by this application adopts the following technical solution:

[0043] S1, fix the dressing body, use the waterproof film 1, the pressing belt 3 and the strong dressing 4 to seal and cover the drug release layer 8 and the central gradient cotton sheet 9 on the patient's wound, and place the tube properly in the receiving groove of the tube fixing clip 10;

[0044] S2. Inject liquid medicine. Pierce the waterproof film 1 with the syringe containing the liquid medicine and align it to insert into the drainage cylinder 7. Then, squeeze the liquid medicine in the syringe into the middle of the drug release layer 8 through the infusion channel 6. The liquid medicine in the middle of the drug release layer 8 not only gradually penetrates the central gradient cotton sheet 9 along the thickness direction of the central gradient cotton sheet 9, but also gradually penetrates from the center of the central gradient cotton sheet 9 to the surrounding areas. Although the liquid medicine content at the center of the central gradient cotton sheet 9 is high and the liquid medicine content around it is low, due to the density of the central gradient cotton sheet 9 gradually decreasing from its center to the outside, after a certain period of time, the humidity at each place on the side of the central gradient cotton sheet 9 close to the patient's wound is similar, ensuring that the central gradient cotton sheet 9 can evenly release the liquid medicine to the patient's wound;

[0045] S3. Observe the drug penetration situation in real time. Through the transparent waterproof film 1 and the transparent slot plate 5, it is possible to quickly check the infiltration situation of the liquid medicine on the drug release layer 8. When the drug release layer 8 is completely infiltrated, it can indicate that the current central gradient cotton sheet 9 has been completely infiltrated, and the liquid medicine has also been relatively evenly released to the patient's wound. In addition, the slot plate 5 can also prevent the liquid medicine from overflowing to the outside of the slot plate 5, ensuring that the waterproof film 1 can be stably attached to the patient's skin;

[0046] S4. Timing monitoring. After the liquid medicine injection is completed, start the electronic timer 12 for timing monitoring. When the preset time is reached, the electronic timer 12 activates an alarm to remind the patient or medical staff to replace or process the dressing.

[0047] Another method for using the external application dressing provided by this application adopts the following technical solution:

[0048] S1. Fix the dressing body. Use the waterproof film 1, the pressure band 3, and the strong dressing 4 to seal and cover the drug release layer 8 and the central gradient cotton sheet 9 at the patient's wound, and ensure that the pipeline is properly placed in the receiving groove of the pipe fixing clip 10;

[0049] S2. Inject liquid medicine. Squeeze the liquid storage bag 11 so that the liquid outlet of the liquid storage bag 11 is squeezed open, and the liquid medicine stored in the liquid storage bag 11 can be squeezed into the drainage cylinder 7. Subsequently, the liquid medicine reaches the middle of the drug release layer 8. The liquid medicine in the middle of the drug release layer 8 not only gradually penetrates the central gradient cotton sheet 9 along the thickness direction of the central gradient cotton sheet 9, but also gradually penetrates from the center of the central gradient cotton sheet 9 to the surrounding areas. Although the liquid medicine content at the center of the central gradient cotton sheet 9 is high and the liquid medicine content around it is low, due to the density of the central gradient cotton sheet 9 gradually decreasing from its center to the outside, after a certain period of time, the humidity at each place on the side of the central gradient cotton sheet 9 close to the patient's wound is similar, ensuring that the central gradient cotton sheet 9 can evenly release the liquid medicine to the patient's wound;

[0050] S3. Observe the drug penetration situation in real time. Through the transparent waterproof film 1 and the transparent card slot plate 5, it is possible to quickly check the wetting situation of the liquid drug on the drug release layer 8. When the drug release layer 8 is completely wetted, it can indicate that the current central gradient cotton sheet 9 has been completely wetted, and the liquid drug is also released relatively evenly to the patient's wound. In addition, the card slot plate 5 can also prevent the liquid drug from overflowing to the outside of the card slot plate 5, ensuring that the waterproof film 1 can be stably attached to the patient's skin;

[0051] S4. Timing monitoring. After the liquid drug injection is completed, start the electronic timer 12 for timing monitoring. When the preset time is reached, the electronic timer 12 activates an alarm to remind the patient or medical staff to replace or process the dressing.

[0052] This application also provides a method for using an external dressing, adopting the following technical solution:

[0053] S1. Fix the dressing body. Use the waterproof film 1, the pressure band 3 and the strong dressing 4 to seal and cover the drug release layer 8 and the central gradient cotton sheet 9 at the patient's wound, and ensure that the pipeline is properly placed in the receiving groove of the pipe fixing clip 10;

[0054] S2. Inject the liquid drug. Squeeze the liquid storage bag 11 so that the liquid outlet of the liquid storage bag 11 is squeezed open, and the liquid drug stored in the liquid storage bag 11 can be squeezed into the drainage tube 7. Subsequently, the liquid drug reaches the middle of the drug release layer 8. The liquid drug in the middle of the drug release layer 8 not only gradually penetrates the central gradient cotton sheet 9 along the thickness direction of the central gradient cotton sheet 9, but also gradually penetrates from the center of the central gradient cotton sheet 9 to the surrounding. Although the liquid drug content at the center of the central gradient cotton sheet 9 is high and the liquid drug content around it is low, due to the density of the central gradient cotton sheet 9 gradually decreasing from its center to the outside, after a certain time, the humidity at each place on the side of the central gradient cotton sheet 9 close to the patient's wound is similar, ensuring that the central gradient cotton sheet 9 can evenly release the liquid drug to the patient's wound;

[0055] S3. Drug supplement. When the liquid drug in the liquid storage bag 11 is used up, if it is still necessary to continue to supplement the drug at the patient's wound, a syringe can be used to pierce the waterproof film 1, and the liquid drug can be continuously injected into the drug release layer 8 and the central gradient cotton sheet 9 through the drainage tube 7, so that the patient's wound can be evenly disinfected or medicated;

[0056] S4. Observe the drug penetration situation in real time. Through the transparent waterproof film 1 and the transparent card slot plate 5, it is possible to quickly check the infiltration situation of the liquid drug on the drug release layer 8. When the drug release layer 8 is completely infiltrated, it can indicate that the current central gradient cotton sheet 9 has been completely infiltrated, and the liquid drug is also released relatively evenly to the patient's wound. In addition, the card slot plate 5 can also prevent the liquid drug from overflowing to the outside of the card slot plate 5, ensuring that the waterproof film 1 can be stably attached to the patient's skin;

[0057] S5. Timing monitoring. After the liquid drug injection is completed, start the electronic timer 12 for timing monitoring. When the preset time is reached, the electronic timer 12 activates an alarm to remind the patient or medical staff to replace or process the dressing.

[0058] The implementation principle of an external dressing and its usage method in the embodiment of this application is as follows: First, use the waterproof film 1, the pressure band 3, and the strong dressing 4 to seal and cover the drug release layer 8 and the central gradient cotton sheet 9 at the patient's wound, and properly place the pipeline in the receiving groove of the pipe fixing clip 10; then inject the liquid drug by squeezing the liquid storage sac 11 and / or the syringe, so that the liquid drug reaches the middle of the drug release layer 8 under the drainage of the drainage tube 7; the liquid drug in the middle of the drug release layer 8 not only gradually penetrates the central gradient cotton sheet 9 along the thickness direction of the central gradient cotton sheet 9, but also gradually penetrates from the center of the central gradient cotton sheet 9 to the surrounding; although the liquid drug content at the center of the central gradient cotton sheet 9 is high and the liquid drug content around it is low, due to the density of the central gradient cotton sheet 9 gradually decreasing from its center to the outside, after a certain period of time, the humidity at each place on the side of the central gradient cotton sheet 9 close to the patient's wound is similar, ensuring that the central gradient cotton sheet 9 can release the liquid drug evenly to the patient's wound. Finally, observe the infiltration situation of the liquid drug on the drug release layer 8 through the transparent waterproof film 1 and the transparent card slot plate 5, and at the same time, cooperate with the timing monitoring of the electronic timer 12 to remind the patient or medical staff to replace or process the dressing in time.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An external application patch, characterized in that: include The patch body is adhered to the skin, and the patch body includes a waterproof film and a drug release layer fixed to the middle of the inner side of the waterproof film, and the drug release layer is made of medical absorbent cotton; The central gradient cotton sheet is fixed in the middle of the inner side of the drug release layer. The central gradient cotton sheet is composed of multiple layers of cotton sheets of different sizes stacked and pressed together, and the density of the central gradient cotton sheet gradually decreases from the center to the outside. An infusion channel is arranged through the middle of the drug release layer, and an outlet end of the infusion channel is aligned with the middle of the central gradient cotton sheet; A card slot plate is fixed in the middle of the inner side of the waterproof film, the drug release layer is embedded and installed on the side of the card slot plate away from the waterproof film, and the infusion channel is sequentially opened in the middle of the card slot plate and the drug release layer; A liquid storage bag is arranged between the card slot plate and the waterproof film, and the liquid outlet of the liquid storage bag is arranged to be aligned with the infusion channel. By squeezing the liquid storage bag, the liquid outlet of the liquid storage bag is squeezed open, and the liquid stored in the liquid storage bag can be squeezed into the infusion channel.

2. The external application patch according to claim 1, characterized in that: An electronic timer is detachably mounted on the outer side of the waterproof film.

3. The external application patch according to claim 2, characterized in that: A non-woven fabric layer is arranged on the inner side of the waterproof film around the card slot plate.

4. The external application patch according to claim 2, characterized in that: Strong patches are arranged around the waterproof film.

5. The external application patch according to claim 4, characterized in that: The waterproof film is surrounded by pressure belts, and the strong application is located on the pressure belts.

6. The external application patch according to claim 2, characterized in that: A tube fixing clamp is arranged inside the waterproof film, one end of the tube fixing bracket points to the card slot plate and is connected with the card slot plate, and the other end extends to the edge of the waterproof film.

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