What is Syringe Needle Shield?

Syringe needle shields have several functions. For example, they protect the needle when a physician is injecting a medication into a patient. They also prevent exposure to infectious materials and foreign objects. are also used to administer vaccines.
Syringe needle shields typically have a cylinder-shaped outer shield and an inner holder. They may not have radially-extending flanges that are used for finger grips. This design helps prevent improper assembly and rotation during use. The inner holder may have a finger grip flange.

Another useful safety device is a sliding needle shield. The shield is biased toward the distal position by a spring. This spring may be a compression, tension, or torsion spring. The spring may also be an adjustable spring. The sliding needle shield is advantageous Because it conceals the hypodermic needle of a pre-filled syringe.

The distal end wall of the needle shield comprises a central aperture 1.1.3 aligned on the central axis A. The inner diameter of this central aperture is smaller than the outer diameter of the needle cap. Hence, a patient will be unable to see the needle. Moreover, the distal end wall of the shield contains two detents that prevent the syringe needle from disengagement.

The pre-filled syringe 2 is attached to a releasable mounting means 1.4. The needle shield 1.1 extends distally in the direction of the support body 1.2. The needle shield 1.1 surrounds the hypodermic needle 2.1 while the syringe is in an advance.