Which IM injection site is located just below the iliac crest?

The ventrogluteal site is located just below the iliac crest and is one of the preferred sites for intramuscular (IM) injections. This area is safer and generally provides better muscle mass than some other injection sites, making it suitable for administering larger volumes of medication. The ventrogluteal site is found by palpating the greater trochanter of the femur with the heel of the hand, and the index finger points towards the anterior superior iliac spine, while the middle finger extends back toward the iliac crest. This positioning defines a triangle where the injection should be given.

The dorsogluteal site, while also used for IM injections, is less preferred because of the proximity to the sciatic nerve and major blood vessels, which increases the risk of nerve injury and bleeding. The deltoid site is suitable for smaller injections but is not optimal for larger volumes due to the limited muscle mass. The vastus lateralis site is commonly used, especially in pediatric patients, but it is located more anteriorly on the thigh and does not answer the question regarding the specific location just below the iliac crest.