At its core, the definition of a hypotube is a small, micro or nano radius tube as small as .005" in outside diameter. Hypotubes can be any length. The most common material is 304 stainless steel hypotubes. I don't believe that there is a definition for the size at which hypotubing is just called tubing. Hypotubes can also be called metric tubing. Modern Grinding can custom manufacture hypotube shafts with stainless steel 304, 316 or nitinol from 11G (.12") down to 34G (.007") sizes.
Stainless Steel Hypotubes are the most common material that hypotubes are made with. This can be 304L stainless steel or 316L. The major difference between stainless steel hypotubes and nitinol hypotubes is that stainless steel kink whereas nitinol is kink resistant.
Although stainless steel is the most common hypotubes, nitinol hypotubes have been gaining momentum in medical devices recently. The upside to nitinol is it's kink resistance. The downside is cost. Prototyping nitinol hypotube devices can be costly. When you get to the production level, the costs can be more economical. Nitinol hypotubes can be more abrasive when in contact with the grinding wheel. Often a secondary process will be required to smooth the ground walls of the nitinol hypotube.
Hypotubes can also be called hypodermic tubing. Hypodermic needles are typically made out of hypodermic tubing.
Hypotubes are often associated with stent designs or other applications in which an opening is laser cut from the outside diameter of a hypotube.
Are you a medical device design firm, OEM or contract manufacturer? Work with our talented engineering staff to understand the manufacturing process and what types of hypotubes are possible. We manufacture needles and custom hypotubes.
Modern Grinding is a custom hypotube manufacturer. We are happy to discuss your next hypotube project and provide a competitive proposal for you.
If you have questions about the definition of a hypotube or types of products that are made out of hypotube material please contact us and we will add it to our page to help other medical designers. email@example.com
Hypotube with a tip laser welded on for a very small needle: