The SPEAR device features a sharper needle point, reducing the amount of force required to insert the needle, as well as a spin-lock feature that helps prevent premature separation between the needle and catheter. To help with confirmation of depth and success, the device has centimeter depth markings and a detachable, low-pressure one-way check valve that creates an audible whistle as air rushes through. The one-way valve can be removed from the needle and either reapplied to the catheter or left off entirely, according to local protocols. Upon removal of the needle, the remaining catheter is a flexible, kink-resistant material with a soft tip to lessen the impact on possible tissue contact. Also, the catheter features 3 fenestrations (holes) along the length to aid in air flow.