Syringe Needle Holder related knowledge points introduction!

Typical syringe needle holders incorporate a ratchet mechanism that clamps the needle between the jaws. This enables the user to maneuver the needle through tissues. The jaws are usually short and have a textured pattern. The holder is made of stainless steel. The holder may be disposable or non-disposable.

The holder also includes a ball, which defines a first longitudinal axis. The holder also has a hub that supports the needle. The hub is engageable with the injector. The ball and the hub cooperate to allow fluid communication between the holder and the carpule. The holder may be sterilized.

The holder may include a packing member, which may be an expansible material. The holder may be able to produce a contact seal when the packing member is compressed. The holder may also have an O-ring at the top of the assembly, which is designed to provide an airtight seal with the bottom of the needle.

The holder may also have a latch to fix the ball to the hub. The holder may be positioned vertically or horizontally. It is recommended that the holder be replaced after a few months of use.
The holder may also have textured patterns, which can be etched directly onto the stainless steel. The holder's jaws should match the size of the needle.

The holder's jaws may have a concave recess 158, which is a size to allow the needle to move in and out. The holder's jaws should also be able to hold the hair of the back of the hand.