What are the applications of medical-grade stainless steel tubing?

01 Aug,2022

Due to Medical stainless steel tubing In other fields, it differs significantly from stainless steel; therefore, it must maintain stable and excellent corrosion resistance—including resistance to intergranular corrosion, stress corrosion, and other forms of localized corrosion—to prevent rapid failure of implanted medical devices and minimize the dissolution of harmful metal ions, thereby ensuring the safety and reliability of stainless steel implants in clinical applications. Consequently, medical-grade stainless steel tubes with superior corrosion resistance are commonly used as implant materials. At present, … 316L and 317L of Fe-Cr-Ni-Mo Austenitic stainless steel materials, characterized by their stable austenitic microstructure, have been widely used in clinical practice.

Medical stainless steel tubing It possesses relatively low strength and a high elastic modulus; therefore, in medical-grade stainless steel tubes, it is common practice to add more than… 10% Nickel, which represents a drawback compared with other structural materials currently used in clinical practice. Therefore, developing new types of medical stainless steel tubes and enhancing the performance of medical-grade stainless steel is of great importance. Fortunately, China has already pioneered a range of novel medical stainless steels, including high-nitrogen, nickel-free austenitic stainless steels, antibacterial stainless steels, and corrosion‑resistant alloys for cardiovascular stents. ISR (In-stent restenosis) Stainless steel. High‑nitrogen, nickel‑free austenitic stainless steel with excellent performance. Since nickel in stainless steel may pose health risks, the development of low‑nickel and nickel‑free medical austenitic stainless steels has become a major global trend in the field. Nitrogen strongly stabilizes the austenitic structure in stainless steel; therefore, substituting nitrogen–manganese for nickel can maintain the austenitic phase, significantly enhancing the mechanical properties and corrosion resistance of medical stainless steel tubing. Medical stainless steel tubing is also widely used in the market.

Medical-grade stainless steel tubing is widely used in the manufacture of anti‑… for cardiovascular stents. ISR Stainless steel. Cardiovascular interventional therapy has already treated many patients with coronary artery disease caused by coronary artery stenosis. However, stent implantation is prone to induce… ISR clinical issues, particularly after stent implantation 3-6 Within a month, ISR The incidence rate is as high as 20%-30% Scientific studies have shown that trace amounts of copper confer numerous benefits to the human cardiovascular system. When trace copper is continuously released at the implantation site, it can help suppress in-stent restenosis from a materials‑based perspective.

Therefore, widely used in clinical practice 316L Building on the foundation of stainless steel for cardiovascular stents, domestic research institutions have developed copper‑containing stainless steel for use in cardiovascular stents, enabling… Medical stainless steel tubing After implantation, it can continuously release trace amounts of copper at the implantation site, enabling the stent to not only provide mechanical support but also to inhibit ISR The results indicate that medical-grade stainless steel tubing can significantly reduce platelet adhesion to its surface, thereby decreasing the propensity for thrombus formation. Consequently, it is evident that copper-containing stainless steels should possess inhibitory… ISR Medical functions that occur, thus used in the manufacture of cardiovascular stents to resist… ISR Stainless steel should be very promising.