Patent attributes
Tissue access devices and methods of using and making the same are disclosed. The devices can have a needle, a housing having wings, a tube having a flow channel, a tube first extension, and a tube second extension, and a torsion spring having a first coil and a second coil. The first coil can have a first coil first arm and a first coil second arm. The first coil first arm can be shorter than the first coil second arm. The second coil can have a second coil first arm and a second coil second arm. The second coil first arm can be shorter than the second coil second arm. The devices can have a sensor. More energy can stored in the torsion spring when the sensor is in a sensor closed configuration than when the sensor is in a sensor open configuration.
