Syringes and Needles Medical Syringes Luer Lock Types of Injections, Same Needle Different Depths IV, IM, SC, and ID look similar but act very differently inside the body. This visual shows where each injection goes, how deep it travels, Needle Injection Techniques Every Nurse Should Know! Whether you're prepping for your NCLEX or brushing up on your skills, here's a quick breakdown of the most common injection routes you'll encounter How to self inject intramuscular vitamin B12 Overview Guy's and St Thomas' NHS Foundation Trust