A recognizable safety syringe with a breathable membrane exhaust valve
By designing a syringe with a breathable membrane exhaust valve, the problem of drug leakage during the exhaust process of traditional syringes is solved, achieving safe and reliable gas venting and drug leakage prevention, and reducing the occupational exposure risk of medical staff.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CANCER HOSPITAL AFFILIATED TO SHANTOU UNIV SCHOOL OF MEDICINE
- Filing Date
- 2025-04-24
- Publication Date
- 2026-07-17
AI Technical Summary
Traditional syringes are prone to spilling medication during the venting process, which can harm the health of medical staff due to the chemotherapy drugs, and it is difficult to ensure that the gas is completely vented.
Design a syringe with a breathable membrane exhaust valve. The breathable membrane allows only gas to pass through and changes color when it comes into contact with liquid. Combined with a protective cap and return tank, it prevents liquid leakage. A buffer section and a reservoir store excess liquid.
It effectively prevents drug spillage, reduces occupational exposure risk, ensures complete venting of gas, facilitates observation of venting status, reduces drug dripping, and lowers the risk of medical accidents.
Smart Images
Figure CN224506016U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of medical device technology, and in particular to an identifiable safety syringe with a breathable membrane exhaust valve. Background Technology
[0002] Chemotherapy is one of the important methods for treating cancer in the treatment of tumors. One of the routes of chemotherapy administration is bolus chemotherapy, which refers to the direct and rapid injection of chemotherapy drugs into the patient's blood circulation through injection, so that the drugs can be quickly distributed to all parts of the body to kill cancer cells or prevent their growth. In clinical practice, it is necessary to purge the air from the syringe before bolus chemotherapy treatment. Otherwise, if air enters the blood vessels, it can easily cause air embolism. However, the traditional method of purging the syringe is to push the piston on the syringe until the drug overflows from the needle. However, if the chemotherapy drugs overflow from the syringe and are not cleaned up in time, they may harm the health of medical staff through the skin, eyes, respiratory tract, etc. Utility Model Content
[0003] This invention provides an identifiable safety syringe with a breathable membrane exhaust valve, which can effectively solve the above-mentioned problems.
[0004] This utility model is implemented as follows:
[0005] This utility model provides an identifiable safety syringe with a breathable membrane exhaust valve, comprising: a syringe, the syringe having a syringe barrel, a nipple disposed at a first end of the syringe barrel, and a piston disposed at a second end of the syringe barrel, the nipple being connected to an exhaust valve, the exhaust valve being used to prevent the internal medication of the syringe from overflowing during the venting operation of the syringe; the exhaust valve having a connecting sleeve adapted to the nipple, the connecting sleeve having a protrusion at the end away from the nipple, the protrusion having a plurality of support columns, an exhaust channel for gas discharge being formed between two adjacent support columns, the support columns having a protective cap at the end away from the protrusion, the protrusion having a groove for connecting a breathable membrane, the breathable membrane being configured to only change color when gas passes through and comes into contact with liquid.
[0006] As a further improvement, the connecting cylinder is provided with a connecting groove, and the connecting groove has an arc-shaped contact surface on the side near the nipple.
[0007] As a further improvement, the protective cover has a return groove formed on the side near the protrusion.
[0008] As a further improvement, the connecting groove has a buffer portion formed on the side near the recess.
[0009] As a further improvement, the buffer section is provided with a liquid storage tank for storing liquid.
[0010] The beneficial effects of this utility model are:
[0011] This invention effectively prevents medication leakage during syringe venting through an exhaust valve design, avoiding occupational exposure injuries to medical personnel from high-risk chemotherapy drugs and reducing the risk of medical accidents. The breathable membrane allows gas to pass through while blocking liquid passage, and changes color upon contact with liquid; this color change indicates that the gas inside the syringe has been vented, facilitating direct observation by medical personnel. The protective cover and return reservoir prevent medication leakage from the exhaust valve when the breathable membrane is damaged or malfunctioning, ensuring the medication directly impacts the return reservoir and drips back into the exhaust valve. The transparent cover allows medical personnel to easily observe whether the breathable membrane has changed color. The buffer section and reservoir effectively prevent the nipple from piercing the breathable membrane, while the reservoir stores excess medication, preventing dripping and occupational exposure injuries to medical personnel when the syringe separates from the exhaust valve. Attached Figure Description
[0012] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.
[0013] Figure 1 This is a schematic diagram of the overall structure of an identifiable safety syringe with a breathable membrane exhaust valve according to this utility model.
[0014] Figure 2 This is a cross-sectional view of the overall structure of an identifiable safety syringe with a breathable membrane exhaust valve according to this utility model.
[0015] Figure 3 This is a schematic diagram of the exhaust valve structure of an identifiable safety syringe with a breathable membrane exhaust valve according to this utility model.
[0016] Figure 4 This is a cross-sectional view of the exhaust valve structure of an identifiable safety syringe with a breathable membrane exhaust valve according to this utility model.
[0017] In the diagram: 1-syringe, 11-syringe, 12-nipple, 13-piston, 2-vent valve, 21-connecting cylinder, 211-connecting groove, 212-contact surface, 22-protrusion, 221-groove, 23-support column, 24-protective cover, 241-return tank, 25-buffer, 251-reservoir, 3-breathable membrane. Detailed Implementation
[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.
[0019] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0020] Reference Figure 1-2As shown, a recognizable safety syringe with a breathable membrane vent valve includes: a syringe 1, which has a syringe barrel 11, a nipple 12 at a first end of the syringe barrel 11, and a piston 13 at a second end of the syringe barrel 11; a vent valve 2 is connected to the nipple 12, which prevents the liquid inside the syringe 1 from overflowing during venting operations; the vent valve 2 has a connecting tube 21 adapted to the nipple 12, and the connecting tube 21 has a protrusion 22 at the end away from the nipple 12. The device 2 is provided with several support columns 23, and an exhaust channel for gas discharge is formed between two adjacent support columns 23. A protective cover 24 is provided at the end of the support column 23 away from the protrusion 22. A groove 221 is provided in the protrusion 22 for connecting the breathable membrane 3. The breathable membrane 3 is configured to only change color when the gas passes through and comes into contact with the liquid. The exhaust valve design can effectively prevent the liquid from overflowing when the syringe is venting, avoid occupational exposure injury to medical staff caused by high-risk chemotherapy drugs, and reduce the risk of medical accidents.
[0021] Furthermore, referring to Figure 3-4 As shown, to facilitate the venting of gas from the syringe and prevent occupational exposure due to drug dripping, an exhaust valve 2 is provided. The exhaust valve 2 is equipped with a connecting tube 21 that is compatible with the nipple 12 of the syringe 1. The connecting tube 21 has a connecting groove 211 inside, and the connecting groove 211 has an arc-shaped contact surface 212 on the side near the nipple 12. The arc-shaped contact surface 212 facilitates the insertion or removal of the nipple 12 into the connecting tube 21. The connecting tube 21 has a protrusion at the end away from the nipple 12. Part 22, the protrusion 22 is provided with a groove 221, and a number of support columns 23 are provided on the side of the protrusion 22 away from the connecting cylinder 21. An exhaust channel for gas discharge is formed between two adjacent support columns 23. A protective cover 24 is provided at the end of the support column 23 away from the protrusion 22. The protective cover 24 is used to prevent liquid from spraying to the outside when the breathable membrane 3 is damaged or fails. The protective cover 24 is made of transparent material so that medical staff can observe the condition of the breathable membrane 3 through the protective cover 24.
[0022] Furthermore, to facilitate medical staff's direct understanding of whether the gas inside the syringe 1 has been expelled and to prevent liquid from dripping from the exhaust valve 2, a breathable membrane 3 is provided. The breathable membrane 3 is located in the groove 221 of the protrusion 22. The breathable membrane 3 is made of a polymer material with a microporous structure, such as a polytetrafluoroethylene membrane or other special materials. The micropore size is smaller than the minimum diameter of liquid molecule clusters. Gas molecules are small and can freely pass through the micropores, while liquid cannot pass through the micropores due to surface tension. Thus, the breathable membrane 3 has the effect of allowing gas to pass through while blocking liquid from passing through. At the same time, the breathable membrane 3 is also equipped with a water-sensitive color-changing material. When the breathable membrane 3 comes into contact with liquid, the color-changing material changes color through chemical reaction or physical adsorption properties. Medical staff can directly observe the color change of the breathable membrane 3 through the protective cover 24. When the breathable membrane 3 changes color, it means that the gas inside the surface syringe 1 has been completely expelled. Secondly, if the exhaust valve 2 has changed color before use, it means that the surface exhaust valve 2 is contaminated by liquid, and medical staff should replace the exhaust valve 2 with a new one.
[0023] Furthermore, to prevent the syringe 1 from puncturing the breathable membrane 3 when connected to the exhaust valve 2, thus causing the breathable membrane 3 to fail, a buffer section 25 is provided. The buffer section 25 is formed on the side of the connecting groove near the recess 221. The buffer section 25 is used to abut against the nipple 12 when the syringe 1 is inserted, preventing the nipple 12 from directly contacting the breathable membrane 3. A liquid storage tank 251 is provided inside the buffer section 25 for storing liquid. When the liquid contacts the breathable membrane 3 and causes a discoloration reaction, the liquid storage tank 251 guides the residual liquid in the buffer section 25 to the liquid storage tank 251, preventing... When the syringe 1 separates from the exhaust valve 2, residual liquid drips into the outside, causing occupational exposure for medical staff. To reduce liquid loss, the diameter of the hole in the buffer part 25 is defined as A, and the diameter of the hole at the end of the nipple 12 is defined as B, then A≤B; the protective cover 24 has a return groove 241 formed on the side near the protrusion 22. The return groove 241 is a hemispherical groove. If the breathable membrane 3 is damaged or fails, the liquid in the syringe 1 can easily hit the protective cover 24. The return groove 241 is set so that the liquid drips back to the transparent membrane 3, thereby reducing the liquid dripping into the outside.
[0024] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. An identifiable safety syringe with a vented membrane exhaust valve, comprising: A syringe (1), the syringe (1) being provided with a syringe barrel (11), a nipple (12) disposed at a first end of the syringe barrel (11), and a piston (13) disposed at a second end of the syringe barrel (11); characterized in that, An exhaust valve (2) is connected to the nipple (12), and the exhaust valve (2) is used to prevent the liquid inside the syringe (1) from overflowing when the syringe (1) is venting. The exhaust valve (2) is provided with a connecting tube (21) adapted to the nipple (12). The connecting tube (21) has a protrusion (22) at one end away from the nipple (12). The protrusion (22) is provided with a plurality of support columns (23). An exhaust channel for gas discharge is formed between two adjacent support columns (23). The support column (23) is provided with a protective cover (24) at one end away from the protrusion (22). The protrusion (22) is provided with a groove (221) for connecting a breathable membrane (3). The breathable membrane (3) is configured to only change color when gas passes through it in contact with liquid.
2. The safety pen injector with a vented membrane vent valve according to claim 1, wherein The connecting cylinder (21) is provided with a connecting groove (211), and the connecting groove (211) has an arc-shaped contact surface (212) on the side near the nipple (12).
3. The safety pen injector with a vented membrane vent valve according to claim 1, wherein The protective cover (24) has a return groove (241) formed on the side near the protrusion (22).
4. The safety pen injector with a vented membrane exhaust valve according to claim 2, wherein The connecting groove (211) has a buffer portion (25) formed on the side near the groove (221).
5. The safety pen injector with a vented membrane vent valve according to claim 4, wherein The buffer section (25) is provided with a liquid storage tank (251) for storing liquid.