Problem: When a client demonstrates the technique for self-administering NPH insulin, which action indicates that the client needs additional teaching? Need Assignment Help? shaking the vial to properly mix the medication before drawing it up introducing the needle into subcutaneous tissue using a quick, dartlike action pulling back on the syringe plunger as soon as the needle is in subcutaneous tissue holding an antiseptic sponge against the needle when removing it from subcutaneous tissue