Application device for medical adhesives

Abstract

This utility model relates to the field of medical product manufacturing technology, specifically a medical adhesive application device that is easy to operate, safe and reliable, prevents backflow, facilitates verification of product use, and allows for visual and controllable dispensing of adhesive. The device comprises a glass tube, a filter plug, a sleeve, and an applicator head. The filter plug is located outside the outlet of the glass tube, the sleeve is fitted over the glass tube and the filter plug, and the applicator head is located at the front end of the sleeve. The device is characterized by the inclusion of a transparent silicone tube connected between the sleeve and the applicator head. Compared with existing technologies, this device offers significant advantages such as ease of operation, safety and reliability, backflow prevention, easy verification of product use, and controllable dispensing volume through the setting of the width and length of the liquid guide tube and the applicator head.

Description

Technical fields:

[0001] This utility model relates to the field of medical product manufacturing technology, specifically a medical adhesive application device that is easy to operate, safe and reliable, prevents backflow, facilitates verification of product use, and allows for visual and controllable application of adhesive. Background technology:

[0002] Medical adhesives are a class of adhesives with α-cyanoacrylate as the main component. Their primary application is the closure of small wounds or surgical incisions on the human body, and they are also suitable for veterinary use. These medical adhesives are normally liquid, but when exposed to air or applied to human skin, they rapidly solidify to form a film, thus achieving wound closure. In the domestic market, they are typically stored in stable glass ampoules. However, in actual use, the ampoule must be opened, and the liquid drawn out using a pipette; this process is cumbersome and prone to leakage. Some foreign manufacturers have addressed this issue by encapsulating the medical adhesive in plastic ampoules or plastic blister packs. However, during storage, an additional outer packaging layer is still required to isolate the bottle from air and prevent the adhesive inside from failing due to contact with air. For example, a multi-layer packaging sheet disclosed in U.S. Patent Nos. 4,698,247 and 4,777,805 by Murray et al. can be constructed into a closed and sealed packaging structure adapted to contain cyanoacrylate compositions.

[0003] With continuous innovation and research and development by domestic and foreign manufacturers, an adhesive application device made of fragile glass ampoules has emerged. When the fragile ampoule breaks, the adhesive flowing out can be applied to the wound site through the applicator. Patent documents such as US8852231B2, CN215780956U, CN215938760U, CN116889675A, CN216136562U, and CN211835782U all disclose technical solutions for related medical adhesive application devices.

[0004] However, existing applicators have significant limitations. Firstly, users find it difficult to accurately and appropriately squeeze and apply fluids such as adhesives to wounds. Secondly, users cannot easily determine whether the device is in use, making it difficult to promptly ascertain whether replacement is necessary. Furthermore, internal pressure in the applicator can cause fluid leakage or lead to the user applying excessive adhesive, as the internal pressure can force fluid to overflow from the applicator tip. When the applicator needs to perform multiple applications or be used on multiple wounds, the need arises for placement. There is a problem with adhesive being squeezed out and flowing back when the applicator is placed flat or upside down, potentially coming into contact with filters or broken glass and causing adhesion, ultimately leading to adhesive loss. Summary of the Invention:

[0005] This invention addresses the shortcomings and deficiencies of existing technologies by proposing a medical adhesive application device that is easy to operate, safe and reliable, prevents backflow, facilitates verification of product use, and allows for visual and controllable application of adhesive.

[0006] This utility model achieves its purpose through the following measures:

[0007] A medical adhesive application device includes a glass tube, a filter plug, a sleeve, and an application head. The filter plug is located outside the outlet of the glass tube, the sleeve is fitted over the glass tube and the filter plug, and the application head is located at the front end of the sleeve. The device is characterized by further including a transparent silicone tube, which is connected between the sleeve and the application head.

[0008] The transparent silicone tube of this invention has an enlarged portion. Due to the softness of the material, the transparent silicone tube, in conjunction with the enlarged portion, can effectively store the outflowing adhesive liquid and facilitate the control of the amount of adhesive liquid flowing out under different levels of extrusion operations by the user.

[0009] The present invention also provides a check valve between the filter plug and the transparent silicone tube. Furthermore, this can be achieved by setting an adapter with a check valve between the filter plug and the transparent silicone tube. The adapter with the check valve is interference-fitted with the sleeve and the transparent silicone tube, and the check valve ensures that the adhesive liquid will not flow back.

[0010] The present invention provides a liquid guide tube between the transparent silicone tube and the applicator head. The rear end of the liquid guide tube is inserted into the front end of the transparent silicone tube. The front end of the liquid guide tube tapers into a dropper shape and is connected to the applicator head to limit the amount of colloid delivered to the applicator head.

[0011] In use, the adhesive is placed in a glass tube. First, the ampoule (the aforementioned glass tube) is crushed by applying appropriate external force. At this time, the liquid adhesive inside the tube flows out under pressure. Then, the liquid passes through the filter plug and then flows through the adapter with a check valve. After passing through the check valve inside the adapter, it enters the silicone tube. When all the liquid has entered the silicone tube, the user can clearly observe the appearance and remaining content of the liquid due to the good transparency of the silicone tube. Then, by squeezing the silicone tube, the liquid is driven by pressure to flow through the liquid guide tube to the application head. The application head then evenly applies the adhesive to the skin area where it needs to be applied, completing the entire application operation.

[0012] Compared with the prior art, this utility model has significant advantages such as simple operation, safety and reliability, backflow prevention, easy verification of product activation, and control of adhesive dispensing volume by setting the width and length of the liquid guide tube and the applicator head. Attached image description:

[0013] Appendix Figure 1This is a schematic diagram of the structure of this utility model.

[0014] Appendix Figure 2 This is an exploded structural diagram of the present invention.

[0015] Attached reference numerals: 1. Sleeve; 2. Glass tube; 3. Filter plug; 4. Adapter with check valve; 5. Silicone tube; 6. Liquid guide tube; 7. Application head. Detailed implementation method:

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] As attached Figure 1 and appendix Figure 2 As shown, this utility model proposes a medical adhesive application device, which includes a glass tube 2, a filter plug 3, a sleeve 1, and an application head 7. The filter plug 3 is located outside the outlet of the glass tube 2, the sleeve 1 is sleeved on the outside of the glass tube 2 and the filter plug 3, the application head 7 is located at the front end of the sleeve 1, and a transparent silicone tube 5 is also provided, which is connected between the sleeve 1 and the application head 7.

[0018] The transparent silicone tube 5 of this invention has an enlarged portion. Due to the softness of the material, the transparent silicone tube 5, in conjunction with the enlarged portion, can effectively store the outflowing adhesive liquid and facilitate the control of the amount of adhesive liquid flowing out under different levels of extrusion operations by the user.

[0019] The present invention further includes a check valve between the filter plug 3 and the transparent silicone tube 5. This can be achieved by setting an adapter 4 with a check valve between the filter plug and the transparent silicone tube. The adapter 4 with the check valve is press-fitted with the sleeve 1 and the transparent silicone tube 5, and the check valve ensures that the adhesive will not flow backward.

[0020] The present invention provides a liquid guide tube 6 between the transparent silicone tube 5 and the applicator head 6. The rear end of the liquid guide tube 6 is inserted into the front end of the transparent silicone tube 5. The front end of the liquid guide tube 6 tapers into a dropper shape and is connected to the applicator head 7 to limit the amount of colloid delivered to the applicator head 7.

[0021] Example:

[0022] This example presents a method as shown in the appendix. Figure 1 , 2The medical adhesive application device shown in this example uses polyethylene glycol (PE) or thermoplastic elastomer (TPE) as the material for the sleeve 1. It primarily serves to protect and support the internal glass tube. The wall thickness of the sleeve 1 in this example is set within the range of 0.8-1.2 mm. This wall thickness range is limited because if the wall thickness is too thin, it will be difficult to effectively perform its protective function; conversely, if the wall thickness is too thick, the external force required to crush the internal glass tube will be excessive, which is not conducive to practical operation.

[0023] The glass tube 2 described in this example is a key component for containing liquid adhesive. It is made of high borosilicate glass with a wall thickness between 0.25-0.35 mm. This material and wall thickness specification can meet the safety requirements for containing liquid adhesive, while taking into account its applicability and stability in actual use.

[0024] The filter plug 3 described in this example plays a crucial role in the filtration process of the entire device. Its function is to ensure that the liquid adhesive can pass through smoothly while effectively filtering out any glass residue that may be generated, thereby ensuring the safety of subsequent use. From a biosafety perspective, the filter plug is made of sintered polyethylene (PE) particles with a mesh size ranging from 20 to 40 mesh. This specification ensures that the adhesive flows smoothly through the filter plug while reliably blocking glass residue from passing through, thus maintaining the purity of the adhesive and the stability of subsequent adhesive application operations.

[0025] This example also includes an adapter 4 with a check valve, made of high-density polyethylene (HDPE). Thanks to the material's inherent high hardness, it possesses excellent structural stability. Its diameter is 0.2-0.4 mm larger than the sleeve and silicone tube, and it achieves a secure connection with the sleeve and silicone tube respectively through an interference fit. Crucially, the adapter is equipped with a check valve. This check valve effectively prevents backflow of the adhesive after it has passed through one end, providing reliable assurance for the unidirectional nature of the entire adhesive application process and precise control of the adhesive flow direction.

[0026] The silicone tube 5 described in this example has suitable transparency and is relatively soft, allowing users to easily pinch it. This characteristic facilitates the smooth extrusion of the adhesive, enabling users to control the extrusion of the adhesive more precisely during operation and improving the controllability and accuracy of the adhesive application operation.

[0027] The bottom end of the liquid guide tube 6 described in this example is a slender tube with a certain length and a specific diameter. Its structure is similar to a dropper head. This design aims to precisely control the amount of adhesive extruded each time, ensuring that the amount of adhesive extruded each time is within an appropriate range, thereby meeting the requirements for precise control of adhesive amount in different application scenarios and avoiding excessive or insufficient adhesive amount from affecting the application effect.

[0028] The application head 7 described in this example is made of soft thermoplastic elastomer (TPE) or soft silicone. Its main purpose is to evenly apply the adhesive squeezed from the infusion tube onto the skin to achieve a good application effect. Furthermore, the head of the application head has a certain width. This width design facilitates the formation of an adhesive film of appropriate width during the application process, ensuring the coverage and adhesion of the adhesive film on the skin, meeting the practical application requirements of medical adhesive application.

[0029] In use, the adhesive is placed in a glass tube 2. First, the ampoule (glass tube 2) is crushed by applying appropriate external force. At this time, the liquid adhesive in the tube flows out under pressure. Then, the liquid passes through the filter plug 3 and then flows through the adapter 4 with a check valve. After passing through the check valve inside the adapter, it enters the silicone tube 5. When all the liquid has entered the silicone tube 5, the user can clearly observe the appearance and remaining content of the liquid due to the good transparency of the silicone tube 5. Then, by squeezing the silicone tube 5, the liquid is driven by pressure to flow through the liquid guide tube to the application head. The application head then evenly applies the adhesive to the skin area where it needs to be applied, completing the entire application operation.

Claims

1. A medical adhesive application device, comprising a glass tube, a filter plug, a sleeve, and an applicator head, wherein the filter plug is disposed outside the outlet of the glass tube, the sleeve is sleeved over the glass tube and the filter plug, and the applicator head is disposed at the front end of the sleeve, characterized in that, It also includes a transparent silicone tube, which connects the sleeve and the applicator head.

2. The applicator for applying medical adhesive according to claim 1, characterized in that, The transparent silicone tube has an enlarged portion.

3. The applicator for applying medical adhesive according to claim 1, characterized in that, A check valve is also provided between the filter plug and the transparent silicone tube.

4. The applicator for applying medical adhesive according to claim 1, characterized in that, An adapter with a check valve is installed between the filter plug and the transparent silicone tube. The adapter with the check valve is interference-fitted with the sleeve and the transparent silicone tube.

5. The applicator for applying medical adhesive according to claim 1, characterized in that, A liquid guide tube is provided between the transparent silicone tube and the applicator head. The rear end of the liquid guide tube is inserted into the front end of the transparent silicone tube. The front end of the liquid guide tube tapers into a dropper shape and is connected to the applicator head to limit the amount of colloid delivered to the applicator head.

Images