A low temperature low humidity sterilization device for heart occlusion degradable materials

Abstract

This invention discloses a low-temperature, low-humidity sterilization device for biodegradable materials used in cardiac occlusion, relating to the field of sterilization technology. The oscillating irradiation mechanism includes a motor and two fixing bars fixedly connected to the top of the sterilization chamber. A cable tray is fixedly connected to the top of the motor, and a rotating disk is fixedly connected to the output end of the motor. A swing shaft is rotatably connected between the inner walls of the two fixing bars. By setting up the oscillating irradiation mechanism, the ultraviolet sterilization lamp at the bottom of the mounting frame oscillates in a fan shape, and the illumination angle is dynamically adjusted in real time with the movement of the mechanism. This allows the ultraviolet light to fully cover all areas inside the sterilization chamber, completely eliminating the sterilization dead zones caused by the fixed irradiation angle and range of traditional fixed-point sterilization lamps. This ensures that all parts of the biodegradable cardiac occlusion material are effectively irradiated, killing all hidden microorganisms and meeting the sterility requirements for medical implants.

Description

Technical Field

[0001] This invention relates to the field of sterilization technology, specifically to a low-temperature, low-humidity sterilization device for biodegradable materials used in cardiac occlusion. Background Technology

[0002] Cardiac occluders are the core implantable devices for interventional treatment of congenital heart disease. Traditional occluders are mostly made of metal. Although their clinical application is mature, long-term retention of metallic foreign bodies in the body can easily lead to complications such as thrombosis, endothelial hyperplasia, and arrhythmias, and also poses a potential impact on the cardiac growth and development of children. To address these issues, biodegradable cardiac occluder materials have emerged, becoming an important development direction for cardiovascular interventional devices. These materials are based on biodegradable polymers such as polylactic acid, polyglycolic acid, and polylactic-co-glycolic acid copolymers, and are sometimes combined with biodegradable metal substrates such as magnesium alloys. They possess good biocompatibility, mechanical support, and controllable degradation. After implantation, they can be used to complete cardiac occlusion. Based on defect sealing and repair, the material gradually degrades into water and carbon dioxide as the myocardial tissue heals and is metabolized and absorbed by the body, leaving no foreign body residue for a long time. This significantly reduces the risk of postoperative complications, making it particularly suitable for the clinical needs of children, adolescents, and other patients in their growth and development stages. However, the physicochemical properties of this type of biodegradable material are extremely sensitive to environmental temperature and humidity. High temperatures can easily lead to thermal degradation and a sharp drop in mechanical strength, while high humidity can cause hydrolysis, deformation, and a decrease in molecular weight. Furthermore, the intricate structure of the material, such as tissue gaps and micropores, can easily become hiding places for microorganisms. If sterilization is not thorough, it can lead to serious postoperative infections after implantation. Therefore, strict and specific requirements are put forward for its sterilization treatment, including low temperature, low humidity, no damage, and sterility.

[0003] However, most traditional low-temperature and low-humidity sterilization devices use sterilization lamps installed at fixed points, often arranged in an array on the top or side wall of the cavity. They lack dynamic adjustment structures and are limited by their installation location, resulting in fixed irradiation angles and coverage areas. In contrast, cardiac occluders are irregularly shaped and precision structures with obstructions such as gaps in the occluder's weave, the area below the connecting rod, and the inner side of the occluder surface. The light from the fixed sterilization lamp cannot bypass these obstructions, creating sterilization blind spots. Consequently, microorganisms in these areas cannot be effectively killed, resulting in substandard sterilization and failure to meet the sterility requirements for medical implants. Summary of the Invention

[0004] The purpose of this invention is to provide a low-temperature, low-humidity sterilization device for biodegradable materials used in cardiac occlusion, thereby solving the technical problems mentioned in the background section.

[0005] The objective of this invention can be achieved through the following technical solutions: A low-temperature, low-humidity sterilization device for biodegradable materials used in cardiac occlusion includes a sterilization chamber, an ultraviolet sterilization lamp, and an air pump. The top of the sterilization chamber is equipped with a swing-type irradiation mechanism.

[0006] The oscillating sterilization mechanism includes a motor and two fixing bars fixedly connected to the top of the sterilization chamber. A cable tray is fixedly connected to the top of the motor, and a rotating disk is fixedly connected to the output end of the motor. A swing shaft is rotatably connected between the inner walls of the two fixing bars. A mounting bracket and two connecting bars are fixedly connected to the surface of the swing shaft, respectively. A connecting shaft is fixedly connected between the inner walls of the two connecting bars. A sliding sleeve is slidably connected to the surface of the connecting shaft, and a transmission shaft is fixedly connected to the surface of the sliding sleeve.

[0007] As a further aspect of the present invention: multiple ultraviolet sterilization lamps are provided and are distributed in a linear array on the bottom of the mounting frame.

[0008] As a further aspect of the present invention: the inner wall of the sterilization chamber is rotatably connected to two rotating door hinges, and door panels are fixedly connected to the surfaces of the two rotating door hinges, and handles are fixedly connected to the front of the two door panels.

[0009] As a further aspect of the present invention: a base is fixedly connected to the bottom of the sterilization box, a support column is fixedly connected to the bottom of the base, and a support base plate is fixedly connected to the bottom end of the support column.

[0010] As a further aspect of the present invention: a support platform is fixedly connected to the top of the base, the air pump is fixedly connected to the top of the support platform, and the air pump and the sterilization chamber are fixedly connected.

[0011] As a further aspect of the present invention: the drive shaft and the rotating disk are adapted to each other, and the cable tray is fixedly connected to the inner wall of the sterilization chamber.

[0012] As a further aspect of the present invention: four support columns are provided and are distributed in a rectangular array at the bottom edge of the base.

[0013] Beneficial effects This invention provides a low-temperature, low-humidity sterilization device for biodegradable materials used in cardiac occlusion. Compared with existing technologies, it has the following advantages: This invention employs a swinging irradiation mechanism, where the ultraviolet sterilization lamp at the bottom of the mounting frame swings back and forth in a fan shape. The angle of illumination is dynamically adjusted in real time according to the movement of the mechanism, ensuring that the ultraviolet light fully covers all areas within the sterilization chamber. This completely eliminates sterilization dead zones caused by the fixed angle and range of traditional fixed-point sterilization lamps, ensuring that all parts of the biodegradable cardiac occlusion material are effectively irradiated, killing all hidden microorganisms and meeting the sterility requirements for medical implants. While achieving dynamic and uniform irradiation, this invention also avoids damage such as aging and decreased mechanical strength of biodegradable polymer materials caused by excessive local light exposure under traditional fixed-lamp irradiation. Attached Figure Description

[0014] Figure 1This is a diagram of the main body of the present invention; Figure 2 This is a plan view of a partial structure of the present invention; Figure 3 This is a diagram showing the door panel of a partial structure of the present invention in an open state; Figure 4 This is a perspective view of the swinging irradiation mechanism of the present invention; Figure 5 This is an anatomical diagram of the swinging irradiation mechanism of the present invention; Figure 6 This is a perspective view of a partial structure of the present invention.

[0015] In the diagram: 1. Sterilization chamber; 2. Ultraviolet sterilization lamp; 3. Air pump; 4. Swinging irradiation mechanism; 41. Motor; 42. Fixing strip; 43. Cable tray; 44. Rotating disc; 45. Swing shaft; 46. Mounting bracket; 47. Connecting strip; 48. Connecting shaft; 49. Sliding sleeve; 410. Drive shaft; 5. Rotating door hinge; 6. Door panel; 7. Handle; 8. Base; 9. Support column; 10. Support base plate; 11. Support platform. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] Please see Figure 1-6As shown, the present invention is a low-temperature and low-humidity sterilization device for biodegradable materials for cardiac occlusion, including a sterilization chamber 1, an ultraviolet sterilization lamp 2, and an air pump 3. The inner top of the sterilization chamber 1 is provided with a swing irradiation mechanism 4. The swing irradiation mechanism 4 includes a motor 41 and two fixing bars 42 fixedly connected to the inner top of the sterilization chamber 1. The motor 41 is a servo geared motor, which can precisely control the rotation speed and rotation angle of the output shaft. The motor 41 is electrically connected to an external power supply and is controlled by an external program. A cable tray 43 is fixedly connected to the top of the motor 41, and a rotating disk 44 is fixedly connected to the output end of the motor 41. A swing shaft 45 is rotatably connected between the inner walls of the two fixed strips 42. A mounting bracket 46 and two connecting strips 47 are fixedly connected to the surface of the swing shaft 45, respectively. A connecting shaft 48 is fixedly connected between the inner walls of the two connecting strips 47. A sliding sleeve 49 is slidably connected to the surface of the connecting shaft 48, and a transmission shaft 410 is fixedly connected to the surface of the sliding sleeve 49. By setting the swing irradiation mechanism 4, the ultraviolet sterilization lamp 2 at the bottom of the mounting bracket swings back and forth in a fan shape. The light angle is dynamically adjusted in real time with the movement of the mechanism, so that the ultraviolet light can fully cover all areas in the sterilization chamber, completely eliminating the sterilization dead corners formed by the fixed irradiation angle and range of traditional fixed-point sterilization lamps. This ensures that all parts of the biodegradable material for cardiac occlusion can be effectively irradiated, killing all hidden microorganisms and meeting the sterility requirements for medical implants. While achieving dynamic and uniform irradiation, it also avoids damage such as aging and decreased mechanical strength of biodegradable polymer materials caused by excessive local light exposure under traditional fixed lamp irradiation.

[0018] Multiple ultraviolet (UV) sterilization lamps 2 are arranged in a linear array on the bottom of the mounting bracket 46. The UV sterilization lamps 2 are the core actuators for achieving non-destructive sterilization. They work in conjunction with the oscillating irradiation mechanism and the low-temperature, low-humidity environment to ensure the sterilization effect and structural integrity of the biodegradable materials used for cardiac occlusion. Using 254nm wavelength UV light, they can destroy the DNA structure of bacteria, spores, and other microorganisms, achieving rapid sterilization and meeting medical implant-grade sterility standards. UV light is a cold light source, with no significant temperature rise during operation, and will not cause thermal degradation or a decrease in mechanical strength of biodegradable materials such as polylactic acid (PLGA). A high-transmittance quartz glass cover is added to the lamp body surface to prevent condensation from affecting light efficiency in low-temperature, low-humidity environments, while also preventing lamp body contamination of materials. This technology is existing and will not be elaborated further in this article. The UV sterilization lamps 2 are electrically connected to an external power supply and are controlled by an external program.

[0019] The inner wall of the sterilization chamber 1 is rotatably connected to two rotating door hinges 5. Door panels 6 are fixedly connected to the surface of both rotating door hinges 5, and handles 7 are fixedly connected to the front of both door panels 6.

[0020] The bottom of the sterilization chamber 1 is fixedly connected to a base 8, the bottom of the base 8 is fixedly connected to a support column 9, and the bottom end of the support column 9 is fixedly connected to a support base plate 10.

[0021] A support platform 11 is fixedly connected to the top of the base 8. The air pump 3 is fixedly connected to the top of the support platform 11. The air pump 3 and the sterilization chamber 1 are fixedly connected. The air pump 3 is a key device to realize the core function of "low temperature and low humidity". Through the air intake pipe, it sends the outside air into the molecular sieve dehumidifier and low temperature refrigeration module, and processes it into dry (relative humidity <30%) and low temperature (20-40℃) sterile air before sending it into the sterilization chamber. At the same time, it will replace the original humid air in the chamber with the chamber exhaust port, thereby quickly establishing and stabilizing the low temperature and low humidity environment in the chamber, avoiding the hydrolysis of biodegradable materials due to high humidity and thermal degradation due to high temperature. At the air intake end, the air pump is equipped with a medical sterile filter with a precision of 0.22μm, which can completely filter bacteria, spores and dust particles in the air, preventing external bacteria from entering the chamber and contaminating the heart occlusion material, meeting the cleanliness requirements of medical implants. Moreover, this is existing technology and will not be described in detail in this article. The air pump 3 is electrically connected to an external power supply and is controlled by an external program.

[0022] The drive shaft 410 and the rotating disk 44 are compatible with each other, and the cable tray 43 is fixedly connected to the inner wall of the sterilization chamber 1. The cable tray 43 can provide a connection channel for the electrical components inside.

[0023] There are four support columns 9, which are arranged in a rectangular array at the bottom edge of the base 8. The design of multiple support columns 9 ensures the stability of the entire device.

[0024] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0025] The working principle of this invention is as follows: First, preliminary preparation is carried out: the biodegradable heart-sealing material to be sterilized is placed in the sterilization chamber 1, the door panel 6 is closed and sealed, and the air pump 3 is started to replace the air in the chamber, introducing dry and sterile low-temperature air to maintain a low-temperature and low-humidity environment in the chamber; then, oscillating irradiation sterilization is carried out: the oscillating irradiation mechanism 4 is started, the motor 41 drives the rotating disk 44 to rotate, the rotating disk drives the transmission shaft 410 to make eccentric circular motion, the transmission shaft slides on the connecting shaft 48 through the sliding sleeve 49, thereby driving the connecting strip 47 and the swing shaft 45 to swing back and forth, and finally the ultraviolet sterilization lamp 2 at the bottom of the mounting frame 46 swings back and forth in a fan shape in sync, realizing dynamic irradiation of the sterilization chamber without dead angles; after sterilization, the material is processed: after sterilization, the air pump 3 is started again to replace the residual gas in the chamber. After the parameters in the chamber meet the standards, the door panel 6 is opened and the sterilized material is taken out.

[0026] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0027] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A low-temperature, low-humidity sterilization device for biodegradable materials used in cardiac occlusion, comprising a sterilization chamber (1), an ultraviolet sterilization lamp (2), and an air pump (3), characterized in that: The sterilization chamber (1) is equipped with a swing irradiation mechanism (4) at its inner top. The swing sterilization mechanism (4) includes a motor (41) and two fixing bars (42) fixedly connected to the top of the sterilization chamber (1). A cable tray (43) is fixedly connected to the top of the motor (41). A rotating disk (44) is fixedly connected to the output end of the motor (41). A swing shaft (45) is rotatably connected between the inner walls of the two fixing bars (42). A mounting bracket (46) and two connecting bars (47) are fixedly connected to the surface of the swing shaft (45). A connecting shaft (48) is fixedly connected between the inner walls of the two connecting bars (47). A sliding sleeve (49) is slidably connected to the surface of the connecting shaft (48). A transmission shaft (410) is fixedly connected to the surface of the sliding sleeve (49).

2. The low-temperature, low-humidity sterilization device for biodegradable materials used in cardiac occlusion according to claim 1, characterized in that: Multiple ultraviolet sterilization lamps (2) are provided and are arranged in a linear array on the bottom of the mounting frame (46).

3. The low-temperature, low-humidity sterilization device for biodegradable materials used in cardiac occlusion according to claim 1, characterized in that: The inner wall of the sterilization chamber (1) is rotatably connected to two rotating door hinges (5), and door panels (6) are fixedly connected to the surfaces of the two rotating door hinges (5). Handles (7) are fixedly connected to the front of the two door panels (6).

4. The low-temperature, low-humidity sterilization device for biodegradable materials used in cardiac occlusion according to claim 1, characterized in that: The bottom of the sterilization box (1) is fixedly connected to a base (8), the bottom of the base (8) is fixedly connected to a support column (9), and the bottom end of the support column (9) is fixedly connected to a support base plate (10).

5. A low-temperature, low-humidity sterilization device for biodegradable materials used in cardiac occlusion according to claim 4, characterized in that: The base (8) is fixedly connected to a support platform (11), the air pump (3) is fixedly connected to the top of the support platform (11), and the air pump (3) and the sterilization box (1) are fixedly connected.

6. The low-temperature, low-humidity sterilization device for biodegradable materials used in cardiac occlusion according to claim 1, characterized in that: The drive shaft (410) and the rotating disk (44) are adapted to each other, and the cable tray (43) is fixedly connected to the inner wall of the sterilization box (1).

7. A low-temperature, low-humidity sterilization device for biodegradable materials used in cardiac occlusion according to claim 4, characterized in that: The support columns (9) are provided in four and are arranged in a rectangular array at the bottom edge of the base (8).

Images