Ultrasonic Spray Coating Machine for Aortic Stents

Aortic stents are core therapeutic devices in the field of cardiovascular intervention. Their core function is to be implanted into the aortic lesion site (such as aortic aneurysm, aortic dissection, and vascular stenosis) through minimally invasive intervention. Relying on their supporting force, they expand blood vessels, reshape vascular morphology, isolate abnormal blood flow, and restore vascular patency, earning them the reputation of “minimally invasive saviors of aortic diseases.” They are widely used in cardiology and vascular surgery, suitable for the treatment of high-risk diseases such as aortic aneurysms and aortic dissections. They can replace traditional open-chest surgery, significantly reducing surgical trauma and shortening the patient’s recovery period. They directly affect the success rate of surgery, postoperative survival rate, and complication rate, making them an indispensable key implantable device in modern minimally invasive cardiovascular treatment. As a precision medical device implanted in the human body and in long-term contact with blood, aortic stents require extremely high standards for the anticoagulant properties, abrasion resistance, endothelialization-promoting ability, and coating adhesion of their coatings. The professional coating treatment using Cheersonic ultrasonic spraying machines is a key process for optimizing performance, compensating for inherent shortcomings, and adapting to the stringent clinical interventional needs, showcasing Cheersonic professional strength in the field of cardiovascular interventional device processing.

Cheersonic ultrasonic spraying machine, with its core technological advantages of precise atomization, uniform film formation, non-destructive spraying, and high material utilization, is perfectly suited to the intricate mesh structure, special material properties, and the need to maintain the supporting toughness of aortic stents. It can precisely cover the inner and outer surfaces of the stent, stent wire gaps, and overlay connections, meeting the needs of multi-functional coatings such as anticoagulation, wear resistance, and endothelialization promotion. It effectively solves the pain points of traditional spraying processes, such as uneven coating, stent wire accumulation, and poor adhesion, overcoming the limitations of traditional coating technologies in terms of micron-level uniformity and material compatibility. Its working principle involves using 50kHz-120kHz high-frequency ultrasonic vibration to atomize specialized medical heparin anticoagulant coating, paclitaxel drug coating, and endothelialization promotion coating into highly uniform micron-sized droplets with a particle size of 1-50μm. Employing a “soft landing” method, these droplets are precisely and uniformly deposited on the stent surface. The coating thickness is controllable and uniformly dense, with a fluctuation error of ≤±3%. It can achieve nanoscale drug dispersion and ultra-thin coating processes, precisely controlling drug loading and release rates. This process preserves the stent’s support strength, flexibility, and biocompatibility without affecting its expansion performance and implantation flexibility. It also comprehensively enhances its anticoagulant properties, wear resistance, and endothelialization promotion capabilities, meeting the core requirements of “precision, safety, and long-lasting effect” in cardiovascular intervention. Furthermore, it can be combined with plasma activation treatment to improve the adhesion of the coating to substrates such as nickel-titanium alloys and cobalt-chromium alloys, preventing coating detachment due to long-term implantation or blood flow erosion.

The Cheersonic ultrasonic spray coating machine employs a rigorous and standardized process for coating aortic stents, fully adhering to the relevant requirements for Class III medical device production and the quality standards for cardiovascular interventional devices, taking into account both the stent’s structural characteristics and clinical implantation needs. The coating uses a medical-grade formula, is non-allergenic and non-cytotoxic, and meets the GB/T 16886 series of biocompatibility standards. The heparin anticoagulant coating continuously inhibits thrombin activity, reduces platelet adhesion, and lowers the risk of thrombosis; the paclitaxel drug coating slowly releases drugs, inhibiting excessive intimal proliferation and reducing in-stent restenosis; the endothelialization-promoting coating promotes endothelial cell adhesion and growth, accelerates vascular wall repair, and achieves organic integration of the stent and the blood vessel. Before spraying, the stent blank undergoes ultra-clean pretreatment to remove surface oil, impurities, and processing residues, and plasma activation treatment enhances surface activity. During spraying, ultrasonic parameters are precisely adjusted to avoid excessive buildup in stent wire gaps, ensuring no missed spraying and no air bubbles. After spraying, it undergoes low-temperature curing to form a stable functional layer, followed by rigorous testing and sterilization packaging, meeting Class 10000 cleanroom production requirements throughout the entire process.

Aortic stents treated with Cheersonic ultrasonic spraying exhibit significantly improved overall performance, with marked anticoagulant effects that effectively inhibit thrombus formation and in-stent restenosis, ensuring long-term vascular patency. The smooth, wear-resistant surface reduces abrasion to the vascular endothelium, lowering the risk of vascular damage. It also promotes endothelialization, accelerating vascular wall repair and enhancing long-term stability after stent implantation. The coating exhibits strong adhesion, showing no detachment after simulated blood flow and long-term implantation tests, without affecting the stent’s support toughness and expansion performance. Compared to traditional spraying processes, Cheersonic ultrasonic spraying achieves a material utilization rate of over 90%, eliminating splashing waste and precisely covering the stent’s fine mesh structure. The spray nozzle is less prone to clogging, resulting in low maintenance costs and effectively reducing manufacturing costs, enhancing product competitiveness, and meeting the large-scale production needs of multi-specification, customized aortic stents.

In clinical applications, aortic stents treated with Cheersonic ultrasonic spraying have gained widespread recognition from cardiovascular medicine and vascular surgery professionals and medical device manufacturers. They are suitable for interventional treatment of various high-risk cardiovascular diseases such as aortic aneurysms and aortic dissections, and are especially suitable for aortic lesions with complex anatomical structures. They can significantly improve the accuracy and safety of interventional surgery, replace traditional open-chest surgery to reduce trauma, shorten the patient’s recovery period, and improve the patient’s postoperative quality of life.

About Cheersonic

Cheersonic is the leading developer and manufacturer of ultrasonic coating systems for applying precise, thin film coatings to protect, strengthen or smooth surfaces on parts and components for the microelectronics/electronics, alternative energy, medical and industrial markets, including specialized glass applications in construction and automotive.

Our coating solutions are environmentally-friendly, efficient and highly reliable, and enable dramatic reductions in overspray, savings in raw material, water and energy usage and provide improved process repeatability, transfer efficiency, high uniformity and reduced emissions.

Email: market2@cheersonic.com