injuries poisoning
How To Do an Ophthalmic Nerve Block
Warnings and Common Errors
To minimize the risk of needle breakage, do not bend the needle at its hub, insert it to its full depth (ie, to the hub), or attempt to change direction of the needle while it is inserted. To help prevent nerve injury or intraneural injection, instruct patients to report paresthesias or pain during the nerve block procedure. To help prevent intravascular injections, aspirate before injecting. 