What Is a Cannula? Types, Tips and Design Considerations
Looking for Cannulas? We Can Help!
Whether you need standard configurations or a custom-engineered solution, our team can help you select the right cannula for your application.
Cannula vs Needle: What’s the Difference?
A cannula is a thin-walled tube with a small internal diameter that is often used to transport, dispense or remove fluids. Cannulas are frequently used in the medical field and are inserted into the body to deliver medicine, drain fluids or introduce a surgical instrument. Other industries use them by integrating them into systems for controlled fluid handling. Vita Needle manufactures precision cannulas for medical and industrial applications. A needle is an assembly that consists of a sharpened cannula attached to a hub for handling or connecting. The hub is the connector component, which provides structural support by securing a cannula in place and provides a connection point to syringes or other systems.
Cannula Tip Designs and Their Uses
The tip of a cannula directly affects the insertion force, flow behavior, precision and repeatability of the process. The sharpness of needles reduces friction, which reduces patient pain, and the optimal bevel is neither too short nor too long. There are many different ways to design the end of a cannula. Vita Needle offers a variety of custom cannula points to meet specific application needs.
Blunt End
A flat or slightly rounded opening. Often used in dispensing systems and lab equipment.
Beveled End
An angled cut at the tip, which has an easy entry into soft materials, improved directional control and is commonly used in medical devices and sampling applications. Bevels are often defined by their angle and can be shallow about 12–18°, steep about 30–35°, or in between.
Trocar Point
A three facet, triangular sharpened point with a high penetration efficiency and minimal force upon insertion. Commonly used for penetrating deep tissue in surgeries.
Lancet Point
A sharpened point typically formed by grinding the primary angle and adding two secondary angles tri bevel. Less aggressive than a trocar point but can still penetrate materials with minimal force and offer high precision and clean entry. For medical purposes, the typical lancet is in the 12–15° degree range. Learn more about lancet point needle designs.
Tapered End
Gradual reduction in diameter without a cutting edge, which allows for controlled insertion and alignment into fittings.
Side Port End
An opening on the side of the tube near the tip, which can be a slot or a hole. Can be helpful for distributing or collecting fluid over a wider area and may have an improved flow distribution.
Why Cannulas Matter
Cannulas are key components for optimal system performance. Their dimensions, surface finish and tip geometry directly affect flow consistency, accuracy and reliability. In medical applications, these factors are particularly important, as cannulas play a direct role in device performance and patient outcomes. High-quality cannulas help ensure dependable operation and repeatable results in the final product. Our team will work with you to identify the optimal cannula design for your specific application. Learn more about our precision small diameter tubing capabilities and custom fabrication expertise.
