The job of the nurse is to put the end of the needle into the muscle (IM=intramuscular), not to shove it in as far as it can go. So, if the nurse did get the needle into the muscle, it should be effective.
An "hypodermic injection" or in the US a "shot".
Gluteus medius and Gluteus maximus
Doing a buttocks injection is simple. You find the spot where the needle of solution needs to go in, insert the needle, and inject the fluid.
Yes, it has to be to complete the injection.
What is the maximum insertion when inserting a needle
To give a cat an IM, or intramuscular injection, position the cat on their right side, pressing hind legs against the table or floor, and holding her head immobile with your left hand. Insert the needle into the fleshiest part of the thigh. Pull slightly back on the plunger to make sure you do not draw blood. If no blood, proceed with the injection by pushing down on the plunger. If there is blood, reinsert the needle into a different spot.
I begged the nurse not to insert the needle into my skin
3/8
0.75 inch needle at 45 degrees.
I think the needle will be inserted in lumbar 3 and 4 for epidural.
Aspirate
Insert the knitting needle into the loop as if to knit (as opposed to the direction you insert to purl), slip the loop onto the inserted needle without creating a new stitch.